US20130014639A1 - Diaphragm - Google Patents
Diaphragm Download PDFInfo
- Publication number
- US20130014639A1 US20130014639A1 US13/637,877 US201113637877A US2013014639A1 US 20130014639 A1 US20130014639 A1 US 20130014639A1 US 201113637877 A US201113637877 A US 201113637877A US 2013014639 A1 US2013014639 A1 US 2013014639A1
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- United States
- Prior art keywords
- housing
- outer peripheral
- diaphragm
- peripheral flange
- flange portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J3/00—Diaphragms; Bellows; Bellows pistons
- F16J3/02—Diaphragms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
- F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
- F15B1/12—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery
- F15B1/125—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery characterised by the attachment means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/20—Accumulator cushioning means
- F15B2201/205—Accumulator cushioning means using gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/315—Accumulator separating means having flexible separating means
- F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/315—Accumulator separating means having flexible separating means
- F15B2201/3156—Accumulator separating means having flexible separating means characterised by their attachment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/60—Assembling or methods for making accumulators
- F15B2201/61—Assembling or methods for making separating means therefor
Definitions
- the present invention relates to a diaphragm, and more particularly, the diaphragm suitably used for an accumulator of a fluid pressure control apparatus for a vehicle, or the like.
- a diaphragm 1 made of a rubber-like elastic body, and including a flexible film portion 2 and an outer peripheral flange portion 3 integrally provided on the peripheral edge of the film portion 2 , has been known.
- the diaphragm 1 is used in, for example, the accumulator of the fluid pressure control apparatus for a vehicle, or the like, and is attached to a pressure room 32 in a housing 31 .
- the film portion 2 is flexibly deformed by operation of pressure, and changes a volume of the pressure room 32 and open/close a vent hole 33 .
- FIG. 6(A) a diaphragm having a type, in which one surface 2 a in the thickness direction of the film portion 2 and one end surface 3 a in the thickness direction of the outer peripheral flange portion 3 are arranged on the same plane, has been developed.
- the diaphragm 1 is attached by which the outer peripheral flange portion 3 is sandwiched between a pair of an upper housing 31 A and a lower housing 31 B.
- the film portion 2 becomes, as an initial moving attitude, a state in which one surface 2 a of the film portion 2 is in contact with a plane portion 35 of the housing 31 A in the lower side in FIG. 6(B) , where the vent hole 33 is provided.
- the diaphragm 1 illustrated in FIGS. 6(A) and 6(B) the diaphragm 1 is largely pressed and deformed when the outer peripheral flange portion 3 is inserted between the pair of the housings 31 A and 31 B.
- FIG. 6(C) by receiving the effect of the deformation, one surface 2 a of the film portion 2 may be separated and risen upward from the plane portion 35 of the lower side housing 31 . In such a case, it is necessary to prevent the rising upward of the film portion 2 and ensure an accurate initial moving attitude.
- the present invention is directed to provide a diaphragm enabling to prevent generation of the rising upward phenomenon of the film portion when the diaphragm is attached to the housing.
- the first aspect of the diaphragm in the present invention is that the diaphragm includes a flexible film portion and an outer peripheral flange portion integrally provided on a peripheral edge of the film portion.
- the outer peripheral flange portion is provided between and held by a pair of a first housing and a second housing.
- the outer peripheral flange portion includes a first pressed surface and a three-dimensional shape composed of a projected portion and a recessed portion.
- the first pressed portion is one surface of the diaphragm in the thickness direction and is in close contact with the first housing.
- the diaphragm according to the present invention includes the flexible film portion and the outer peripheral flange portion integrally provided on the peripheral edge of the film portion.
- the outer peripheral flange portion is provided between and held by a pair of the first housing and the second housing, for example, the diaphragm is used in an accumulator of the fluid pressure control apparatus for a vehicle, or the like, the state in which the film portion is seated in the first housing is set to be an initial moving attitude.
- the diaphragm operates so as to separate the film portion from the first housing.
- voids in the thickness direction can be defined between the outer peripheral flange portion and the first housing.
- the voids in the thickness direction absorbs the deformation by compression from the first housing and the second housing of the outer peripheral flange portion, so that the rising upward of the film portion from the first housing generated by the effect of the deformation can be prevented, when the diaphragm is attached between the first housing and the second housing, i.e., in the initial moving attitude where the pressure difference is not generated.
- the second aspect of the diaphragm in the present invention is that, in the diaphragm according to the first aspect, the three-dimension shape is an annular projection provided on a center portion in the diameter direction of the first pressed surface.
- the voids in the thickness direction is defined on the more outer side in the diameter direction than the annular projection on the first pressed surface.
- the voids in the thickness direction is defined on the more outer side in the diameter direction than the annular projection on the first pressed surface, so that a space of the voids in the thickness direction can be sufficiently secured by the annular projection.
- the third aspect of the diaphragm in the present invention is that, in the diaphragm according to the first aspect or second aspect, when the outer peripheral flange portion is attached between the first housing and the second housing, the outer peripheral flange portion is set to have the outer diameter size which can define the voids in the diameter direction between the outer peripheral surface of the outer peripheral flange portion and at least one of the first housing or the second housing, in the diameter direction of the diaphragm.
- the fourth aspect of the diaphragm in the present invention is that, in any one of the diaphragm according to the first aspect or third aspect, the outer peripheral flange portion includes a second pressed surface, which is another surface in the thickness direction of the diaphragm and pressed by the second housing, and a three-dimensional shape composed of a projected portion or a recessed portion on the second pressed surface.
- the voids in the thickness direction can be easily defined between the outer peripheral flange portion and the second housing.
- the deformation by the compression from the first housing and the second housing can be more easily absorbed by the voids in the thickness direction.
- the fifth aspect of a supporting structure of the diaphragm in the present invention is the diaphragm supporting structure which holds the diaphragm by the first housing and the second housing, and includes any one of diaphragm according to the first aspect or fourth aspect as the diaphragm.
- the rising upward of the film portion from the first housing can be prevented by any one of the diaphragm according to the first aspect or fourth aspect.
- the present invention has following effects.
- the voids in the thickness direction and the voids in the diameter direction are set around the outer peripheral flange portion and refuges of the rubber-like elastic body are secured at the time of deformation of the flange, so that the deformation of the flange portion can be absorbed in the refuges to prevent the influence of the deformation to reach the film portion in the inner peripheral side. Therefore, the phenomenon of the rising upward of the film portion can be prevented and the accurate initial moving attitude can be secured.
- FIG. 1 is a view illustrating a diaphragm according to an example of the present invention.
- A is a half cross-sectional view in the state before being attached and
- B is an enlarged view of the essential part of (A).
- FIG. 2 is a view illustrating the same diaphragm in FIG. 1 .
- (A) is a half cross-sectional view in the state being attached and (B) is an enlarged view of the essential part of (A).
- FIG. 3 is a view illustrating a diaphragm according to another example of the present invention.
- (A) is a half cross-sectional view in the state before being attached and
- (B) is an enlarged view of the essential part of (A).
- FIG. 5 is a cross-sectional view illustrating the attached state of a diaphragm according to a conventional example.
- FIG. 6 is the diaphragm according to the comparative example.
- A is a half cross-sectional view in the state before being attached
- B is an enlarged view of the essential part of (A)
- C is a half cross-sectional view in the defect generation state.
- a diaphragm 1 according to the present example is formed in a disk-like shape by a predetermined rubber-like elastic body.
- the diaphragm integrally includes a flexible film portion 2 and an annular outer peripheral flange portion (outer peripheral attaching portion) 3 provided at a peripheral edge of the film portion 2 .
- the diaphragm 1 according to the present examples is used for an accumulator of a fluid pressure control apparatus for vehicles which performs ABS control, ESC control, or the like.
- the outer peripheral flange portion 3 is sandwiched by a pair of upper and lower housings 31 A and 31 B to be attached to a pressure room 32 (refer to FIG.
- the film portion 2 is formed to be a flat plate having a uniform thickness over the whole surface (however, the case when a thick portion described below is provided is excepted).
- the film portion 2 includes one surface 2 a facing to one housing 31 A (a first housing), in which the vent hole 33 is provided, and another surface 2 b in the opposite side.
- the outer peripheral flange portion 3 is set to have a larger thickness than the film portion 2 and formed to have a cross-sectional approximately rectangular shape.
- One end surface in the thickness direction of the outer peripheral flange portion is set to be a pressed surface (a first pressed surface) 3 a with respect to the one housing 31 A in which the vent hole 33 is provided, and another end surface is set to be a pressed surface (a second pressed surface) 31 b pressed by the another housing (a second housing) 31 B.
- the first pressed surface 3 a and the one surface 2 a of the film portion 2 is arranged on the same plane to be a flat surface.
- the second pressed surface 3 b protrudes more in the thickness direction than the another surface 2 b of the film portion 2 .
- a thick portion 4 having recessed part 5 is integrally formed at the plane center of the film portion 2 .
- a recessed portion 34 for inserting the thick portion 4 is provided around the opening of the vent hole 33 in the one housing 31 A.
- the thick portion 4 and the recessed portion 34 are not indispensable configurations, so that these portions can not be provided.
- the plane portion 35 which is in contact with the approximately whole surface of the one surface 2 a of the film portion 2 , is provided.
- an annular attaching portion 36 (refer to FIG. 2 ) for attaching the outer peripheral flange portion 3 of the diaphragm 1 is provided.
- an annular step portion 37 is provided to form an outer peripheral wall 36 a of the attaching portion 36 and, in the another housing 31 B, an annular stopper portion 38 having a projection shape is provided to form an inner peripheral wall 36 b of the attaching portion 36 .
- a size c of the attaching portion 36 in the thickness direction is set to be smaller than a size d of the outer peripheral flange portion 3 in the thickness direction in a free state (c ⁇ d) (refer to FIG. 1 ).
- a size ⁇ e of the attaching portion 36 in the width direction is set to be larger than a size ⁇ f of the outer peripheral flange portion 3 in the width direction in the free state ( ⁇ e> ⁇ f) (refer to FIG. 1 ).
- a distance g between the plane portion 35 of the one housing 31 A and the stopper portion 38 of the another housing 31 B is set to be the same as a thickness size h of the film portion 2 (refer to FIG. 1 ) or a little larger than the thickness size of the film portion 2 (g ⁇ h).
- the film portion 2 can be already separated and risen from the planet portion 35 of the housing 31 A in the initial moving attitude in which the outer peripheral flange portion 3 is only attached between the housings 31 A and 31 B. In such a case, the countermeasure of this phenomenon is necessary.
- a three-dimensional shape 7 is provided on a part of the plane of the first pressed surface 3 a of the outer peripheral flange portion 3 .
- the three-dimensional shape 7 sets voids in the thickness direction 8 (which are illustrated in FIG. 2 ) between the outer peripheral flange portion 3 and the one housing 31 A.
- the voids in the thickness direction 8 becomes a refuge space at a time of deformation of the outer peripheral flange portion 3 and prevents generation of the phenomenon of rising upward of the film portion 2 by the deformation of the outer peripheral flange portion 3 , when the outer peripheral flange portion 3 is attached between the housings 31 A and 31 B and compressed and deformed.
- the projection 9 is annually formed on the whole periphery of the first pressed surface 3 a .
- the shape in the plane view is not limited to the circle shape but can be an arrangement in which a plurality of projections are arranged on the first pressed surface 3 a in the circumferential direction, if there are no problems in the sealing ability.
- the outer peripheral flange portion 3 is set to have the outer diameter size enabling to define voids in the diameter direction 10 (which is illustrated in FIG. 2 ) between the outer peripheral surface 3 c of the outer peripheral flange portion 3 and the outer peripheral wall 36 a of the housing attaching portion 36 , when the outer peripheral flange portion 3 is attached between the housings 31 A and 31 B.
- projections (not illustrated) can be provided and in contact with the outer peripheral wall 36 a of the housing attaching portion 36 .
- the second pressed surface 3 b of the outer peripheral flange portion 3 can be a flat surface
- a three-dimensional shape 11 in a part on the plane is also provided on the second pressed surface 3 b. More specifically, the three-dimensional shape 11 is provided as a projection 12 at a center portion in the diameter direction of the second pressed surface 3 b.
- the voids in the thickness direction 13 is set on the outer peripheral side of the projection 12 and between the second pressed surface 3 b of the outer peripheral flange portion 3 and a bottom surface 36 d in the opposite side of the housing attaching portion 36 , as illustrated in FIG. 2 .
- the projection 12 is formed to have a circle shape in a cross section cut by a plane containing a center axis of the diaphragm illustrated in FIG. 1 .
- the projection 12 is annually formed on the whole periphery of the second pressed surface 3 b.
- the shape of the plane view of the projection 12 is not limited to the circle shape but can be a structure in which a plurality of projections are arranged in the circumferential direction, if there are no problems in the sealing ability.
- the three-dimensional shape 7 in a part on the plane i.e., the projection 9
- the projection 9 is provided on the first pressed surface 3 a of the outer peripheral flange portion 3 .
- the voids in the thickness direction 8 is defined on the outer peripheral side of the projection 9 and between the first pressed surface 3 a of the outer peripheral flange portion 3 and the bottom surface 36 c of the housing attaching portion 36 .
- the voids in the thickness direction 8 _ has a size enabling to absorb the elastic deformation of the outer peripheral flange portion 3 by the compression in the vertical direction illustrated in FIGS.
- the voids in the thickness direction 8 can be provided not only on the outer peripheral side but also the inner peripheral side.
- the voids in the diameter direction 10 are defined between the outer peripheral surface 3 c of the outer peripheral flange portion 3 and the outer peripheral wall 36 a of the housing attaching portion 36 together with aforementioned voids in the thickness direction 8 .
- the voids in the diameter direction 10 absorbs a part of the elastic deformation of the outer peripheral flange portion 3 generated by the vertical compression illustrated in FIGS. 1 and 2 , when the diaphragm 1 is attached between the first housing 31 A and second housing 31 B.
- the voids in the diameter direction 10 By adding the voids in the diameter direction 10 to the voids in the thickness direction 8 , the voids absorbing the elastic deformation of the outer peripheral flange portion 3 can be more enlarged, and the generation of the rising upward of the film portion 2 can be more easily prevented.
- the three-dimensional shape 11 i.e., the projection 12 is also provided on the second pressed surface 3 b of the outer peripheral flange portion 3 , so that the voids in the thickness direction 13 is defined on the outer peripheral side of the projection 12 and between the second pressed surface 3 b and the bottom surface 36 b of the housing attaching portion 36 .
- the voids in the thickness direction 13 also absorbs a part of the elastic deformation of the outer peripheral flange portion 3 by the compression in the vertical direction illustrated in FIGS. 1 and 2 , when the diaphragm 1 is attached between the first housing 31 A and the second housing 31 B.
- the voids in the thickness direction 13 can enlarge more the voids absorbing the elastic deformation of the outer peripheral flange portion 3 , so that the generation of rising upward of the film portion 2 can be more easily prevented.
- the voids in the thickness direction 13 can be defined not only on the outer peripheral side of the projection 12 but also on the inner peripheral side of the projection 12 .
- the projected portion such as, the projections 9 and 12 which are the above voids three-dimensional shapes 7 and 11
- the projected portion there is a case in which a plurality of projected portions is respectively provided in parallel on the first pressed surface 3 a or the second pressed surface 3 b of the outer peripheral flange portion 3 .
- the voids in the thickness direction 8 and 13 which become the refuge of the rubber-like elastic body, are set between the projections 9 and 12 each other.
- the three-dimensional shape 7 , 11 can be a recessed portion instead of the projected portions, such as, the projections 9 and 12 .
- voids 8 and 13 which become the refuge of the rubber-like elastic body, are set between the outer peripheral flange portion 3 and the bottom surfaces 36 c and 36 d of the housing attaching portion 36 , while being in the state that the first pressed surface 3 a or the second pressed surface 3 b of the outer peripheral flange portion 3 are directly in contact with the bottom surface 36 c or 36 d of the housing attaching portion 36 and compressed.
- a plurality of recessed portions are arrange in parallel.
- the three-dimensional shape 11 in the upper side in figures is formed on the second pressed surface 3 b by a groove-shaped recessed portion 14 , in the upper and lower three-dimensional shapes 7 and 11 .
- each voids 8 , 10 , and 13 act as the refuge of the rubber-like elastic body when the outer peripheral flange portion 3 is sandwiched between the housings 31 A and 31 B, and compressed and deformed.
- the aforementioned each voids 8 , 10 , and 13 act as the refuge of the rubber-like elastic body when the outer peripheral flange portion 3 is sandwiched between the housings 31 A and 31 B, and compressed and deformed.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Diaphragms And Bellows (AREA)
- Braking Systems And Boosters (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Disclosed is a diaphragm having a flexible film portion and an outer peripheral flange portion integrally provided on the peripheral edge of the film portion, said outer peripheral flange portion being provided between and held by a first housing and a second housing, wherein the film portion is prevented from rising upward when the diaphragm is attached to the housings. The outer peripheral flange portion has a first pressed surface which is one surface of the diaphragm in the thickness direction and which is in close contact with the first housing, and a three-dimensional shape composed of a projected portion or a recessed portion, on the first pressed surface. When the outer peripheral flange portion is attached to the first housing and the second housing while being compressed and deformed therebetween, the three-dimensional shape defines voids in the thickness direction between the outer peripheral flange portion and the first housing.
Description
- This application is a U.S. National Stage Application of International Application No. PCT/JP2011/057082, filed on Mar. 24, 2011 and published in Japanese as WO 2011/122424-A1 on Oct. 6, 2011. This application claims the benefit of Japanese Application No. 2010-074546, filed on Mar. 29, 2010. The entire disclosures of the above applications are incorporated herein by reference.
- 1. Field of the Invention
- The present invention relates to a diaphragm, and more particularly, the diaphragm suitably used for an accumulator of a fluid pressure control apparatus for a vehicle, or the like.
- 2. Description of the Conventional Art
- From conventional, as illustrated in
FIG. 5 , adiaphragm 1 made of a rubber-like elastic body, and including aflexible film portion 2 and an outerperipheral flange portion 3 integrally provided on the peripheral edge of thefilm portion 2, has been known. Thediaphragm 1 is used in, for example, the accumulator of the fluid pressure control apparatus for a vehicle, or the like, and is attached to apressure room 32 in ahousing 31. Thefilm portion 2 is flexibly deformed by operation of pressure, and changes a volume of thepressure room 32 and open/close avent hole 33. - In the above outlines of the diaphragm, recently, as illustrated in
FIG. 6(A) , a diaphragm having a type, in which onesurface 2 a in the thickness direction of thefilm portion 2 and oneend surface 3 a in the thickness direction of the outerperipheral flange portion 3 are arranged on the same plane, has been developed. As illustrated inFIG. 6(B) , thediaphragm 1 is attached by which the outerperipheral flange portion 3 is sandwiched between a pair of anupper housing 31A and alower housing 31B. At this time, thefilm portion 2 becomes, as an initial moving attitude, a state in which onesurface 2 a of thefilm portion 2 is in contact with aplane portion 35 of thehousing 31A in the lower side inFIG. 6(B) , where thevent hole 33 is provided. - However, in the
diaphragm 1 illustrated inFIGS. 6(A) and 6(B) , thediaphragm 1 is largely pressed and deformed when the outerperipheral flange portion 3 is inserted between the pair of thehousings FIG. 6(C) , by receiving the effect of the deformation, onesurface 2 a of thefilm portion 2 may be separated and risen upward from theplane portion 35 of thelower side housing 31. In such a case, it is necessary to prevent the rising upward of thefilm portion 2 and ensure an accurate initial moving attitude. - In view of the above problems, the present invention is directed to provide a diaphragm enabling to prevent generation of the rising upward phenomenon of the film portion when the diaphragm is attached to the housing.
- For obtaining the above object, the first aspect of the diaphragm in the present invention is that the diaphragm includes a flexible film portion and an outer peripheral flange portion integrally provided on a peripheral edge of the film portion. The outer peripheral flange portion is provided between and held by a pair of a first housing and a second housing. The outer peripheral flange portion includes a first pressed surface and a three-dimensional shape composed of a projected portion and a recessed portion. The first pressed portion is one surface of the diaphragm in the thickness direction and is in close contact with the first housing. When the outer peripheral flange portion is attached to the first housing and the second housing while being compressed and deformed therebetween, the three-dimensional shape defines voids in the thickness direction between the outer peripheral flange portion and the first housing.
- The diaphragm according to the present invention includes the flexible film portion and the outer peripheral flange portion integrally provided on the peripheral edge of the film portion. When the outer peripheral flange portion is provided between and held by a pair of the first housing and the second housing, for example, the diaphragm is used in an accumulator of the fluid pressure control apparatus for a vehicle, or the like, the state in which the film portion is seated in the first housing is set to be an initial moving attitude. When a pressure difference between the space between the first housing and the diaphragm and the space between the diaphragm and the second housing is generated, the diaphragm operates so as to separate the film portion from the first housing. According to the first aspect, only making the first pressed surface to have the three dimensional shape, voids in the thickness direction can be defined between the outer peripheral flange portion and the first housing. The voids in the thickness direction absorbs the deformation by compression from the first housing and the second housing of the outer peripheral flange portion, so that the rising upward of the film portion from the first housing generated by the effect of the deformation can be prevented, when the diaphragm is attached between the first housing and the second housing, i.e., in the initial moving attitude where the pressure difference is not generated.
- Further, the second aspect of the diaphragm in the present invention is that, in the diaphragm according to the first aspect, the three-dimension shape is an annular projection provided on a center portion in the diameter direction of the first pressed surface. When the outer peripheral flange portion is attached to the first housing and the second housing while being compressed and deformed therebetween, the voids in the thickness direction is defined on the more outer side in the diameter direction than the annular projection on the first pressed surface.
- According to the second aspect, the voids in the thickness direction is defined on the more outer side in the diameter direction than the annular projection on the first pressed surface, so that a space of the voids in the thickness direction can be sufficiently secured by the annular projection. Thus, the deformation by the compression from the first housing and the second housing of the outer peripheral flange portion can be easily absorbed.
- Further, the third aspect of the diaphragm in the present invention is that, in the diaphragm according to the first aspect or second aspect, when the outer peripheral flange portion is attached between the first housing and the second housing, the outer peripheral flange portion is set to have the outer diameter size which can define the voids in the diameter direction between the outer peripheral surface of the outer peripheral flange portion and at least one of the first housing or the second housing, in the diameter direction of the diaphragm.
- According to the third aspect, the absorption of the deformation by the compression from the first housing and the second housing becomes more easily by the voids in the diameter direction.
- Further, the fourth aspect of the diaphragm in the present invention is that, in any one of the diaphragm according to the first aspect or third aspect, the outer peripheral flange portion includes a second pressed surface, which is another surface in the thickness direction of the diaphragm and pressed by the second housing, and a three-dimensional shape composed of a projected portion or a recessed portion on the second pressed surface.
- According to the fourth aspect, by only making the second pressed surface to have the three-dimensional shape, the voids in the thickness direction can be easily defined between the outer peripheral flange portion and the second housing. Thus, the deformation by the compression from the first housing and the second housing can be more easily absorbed by the voids in the thickness direction.
- Furthermore, the fifth aspect of a supporting structure of the diaphragm in the present invention is the diaphragm supporting structure which holds the diaphragm by the first housing and the second housing, and includes any one of diaphragm according to the first aspect or fourth aspect as the diaphragm.
- According to the fifth aspect, in the diaphragm supporting structure, the rising upward of the film portion from the first housing can be prevented by any one of the diaphragm according to the first aspect or fourth aspect.
- The present invention has following effects.
- That is, as described above, in the present invention, the voids in the thickness direction and the voids in the diameter direction are set around the outer peripheral flange portion and refuges of the rubber-like elastic body are secured at the time of deformation of the flange, so that the deformation of the flange portion can be absorbed in the refuges to prevent the influence of the deformation to reach the film portion in the inner peripheral side. Therefore, the phenomenon of the rising upward of the film portion can be prevented and the accurate initial moving attitude can be secured.
-
FIG. 1 is a view illustrating a diaphragm according to an example of the present invention. (A) is a half cross-sectional view in the state before being attached and (B) is an enlarged view of the essential part of (A). -
FIG. 2 is a view illustrating the same diaphragm inFIG. 1 . (A) is a half cross-sectional view in the state being attached and (B) is an enlarged view of the essential part of (A). -
FIG. 3 is a view illustrating a diaphragm according to another example of the present invention. (A) is a half cross-sectional view in the state before being attached and (B) is an enlarged view of the essential part of (A). -
FIG. 4 is a view illustrating the same diaphragm inFIG. 3 . (A) is a half cross-sectional view in the state being attached and (B) is an enlarged view of the essential part of (A). -
FIG. 5 is a cross-sectional view illustrating the attached state of a diaphragm according to a conventional example. -
FIG. 6 is the diaphragm according to the comparative example. (A) is a half cross-sectional view in the state before being attached, (B) is an enlarged view of the essential part of (A), and (C) is a half cross-sectional view in the defect generation state. - Then, the examples of the present invention will be described, referring to figures.
- As illustrated in
FIG. 1 andFIG. 2 , adiaphragm 1 according to the present example is formed in a disk-like shape by a predetermined rubber-like elastic body. The diaphragm integrally includes aflexible film portion 2 and an annular outer peripheral flange portion (outer peripheral attaching portion) 3 provided at a peripheral edge of thefilm portion 2. Further, thediaphragm 1 according to the present examples is used for an accumulator of a fluid pressure control apparatus for vehicles which performs ABS control, ESC control, or the like. In thediaphragm 1, the outerperipheral flange portion 3 is sandwiched by a pair of upper andlower housings FIG. 2 ) in thehousings vent hole 33 is provided in thelower side housing 31A inFIG. 1 and, at theupper side housing 31B, fore example, acommunication hole 39, which communicates with a flow path of an operation fluid of the fluid pressure control apparatus for vehicles, is provided. - As for a detailed structure of the
diaphragm 1, thefilm portion 2 is formed to be a flat plate having a uniform thickness over the whole surface (however, the case when a thick portion described below is provided is excepted). Thefilm portion 2 includes onesurface 2 a facing to onehousing 31A (a first housing), in which thevent hole 33 is provided, and anothersurface 2 b in the opposite side. The outerperipheral flange portion 3 is set to have a larger thickness than thefilm portion 2 and formed to have a cross-sectional approximately rectangular shape. One end surface in the thickness direction of the outer peripheral flange portion is set to be a pressed surface (a first pressed surface) 3 a with respect to the onehousing 31A in which thevent hole 33 is provided, and another end surface is set to be a pressed surface (a second pressed surface) 31 b pressed by the another housing (a second housing) 31B. The first pressedsurface 3 a and the onesurface 2 a of thefilm portion 2 is arranged on the same plane to be a flat surface. The second pressedsurface 3 b protrudes more in the thickness direction than the anothersurface 2 b of thefilm portion 2. - In addition, for preventing the
film portion 2 to interfere with the vent hole 33 (thefilm portion 2 is bitted into the vent hole), athick portion 4 having recessedpart 5 is integrally formed at the plane center of thefilm portion 2. Corresponding to thethick portion 4, a recessedportion 34 for inserting thethick portion 4 is provided around the opening of thevent hole 33 in the onehousing 31A. However, thethick portion 4 and the recessedportion 34 are not indispensable configurations, so that these portions can not be provided. - In the one
housing 31A in which theabove vent hole 33 is provided, theplane portion 35, which is in contact with the approximately whole surface of the onesurface 2 a of thefilm portion 2, is provided. Between a pair of thehousings FIG. 2 ) for attaching the outerperipheral flange portion 3 of thediaphragm 1 is provided. With this structure, in the onehousing 31A, anannular step portion 37 is provided to form an outerperipheral wall 36 a of the attachingportion 36 and, in the anotherhousing 31B, anannular stopper portion 38 having a projection shape is provided to form an innerperipheral wall 36 b of the attachingportion 36. - A size c of the attaching
portion 36 in the thickness direction (refer toFIG. 2 ) is set to be smaller than a size d of the outerperipheral flange portion 3 in the thickness direction in a free state (c<d) (refer toFIG. 1 ). In contrast, a size φe of the attachingportion 36 in the width direction (a diameter direction) (refer toFIG. 2 ) is set to be larger than a size φf of the outerperipheral flange portion 3 in the width direction in the free state (φe>φf) (refer toFIG. 1 ). Further, a distance g between theplane portion 35 of the onehousing 31A and thestopper portion 38 of the anotherhousing 31B (refer toFIG. 2 ) is set to be the same as a thickness size h of the film portion 2 (refer toFIG. 1 ) or a little larger than the thickness size of the film portion 2 (g≧h). - Assuming these items mentioned above, when the
diaphragm 1 is attached between a pair of thehousings FIG. 2 , the state in which thefilm portion 2 is in contact with theplane portion 35 of the onehousing 31A by the onesurface 2 a thereof becomes an initial moving attitude. When pressure is applied to the diaphragm in the initial moving attitude, thefilm portion 2 is separated from theplane portion 35 of thehousing 31A. The outerperipheral flange portion 3 is compressed and deformed when the diaphragm is attached between thehousings FIG. 1 toFIG. 2 . Even when the outerperipheral flange portion 3 is compressed and deformed, it is an ideal form for the diaphragm to keep the state in which thefilm portion 2 is in contact with theplane portion 35 of thehousing 31A. However, as described above, depending on the cross-sectional shape of thediaphragm 1, as illustrated inFIG. 6(C) , thefilm portion 2 can be already separated and risen from theplanet portion 35 of thehousing 31A in the initial moving attitude in which the outerperipheral flange portion 3 is only attached between thehousings - Thus, the present inventors have reached the present invention and propose the following examples according to the present invention.
- That is, as illustrated in
FIG. 1 , in thediaphragm 1 according to the examples, a three-dimensional shape 7 is provided on a part of the plane of the firstpressed surface 3 a of the outerperipheral flange portion 3. As illustrated inFIG. 2 , the three-dimensional shape 7 sets voids in the thickness direction 8 (which are illustrated inFIG. 2 ) between the outerperipheral flange portion 3 and the onehousing 31A. The voids in thethickness direction 8 becomes a refuge space at a time of deformation of the outerperipheral flange portion 3 and prevents generation of the phenomenon of rising upward of thefilm portion 2 by the deformation of the outerperipheral flange portion 3, when the outerperipheral flange portion 3 is attached between thehousings - More specifically, the three-
dimensional shape 7 is provided as aprojection 9 provided at the center portion in the diameter direction of the first compressed surface of 3 a. By being provided such theprojection 9, the voids in thethickness direction 8 is set, in the attached state of the diaphragm, on the outer periphery side of theprojection 9 and between the firstpressed surface 3 a of the outerperipheral flange portion 3 and thebottom surface 36 c of thehousing attaching portion 36. Theprojection 9 is formed in a circle shape in a cross section cut by a plane containing a center axis of the diaphragm illustrated inFIG. 1 . In a plane view viewing from the under side inFIG. 1 , theprojection 9 is annually formed on the whole periphery of the firstpressed surface 3 a. However, the shape in the plane view is not limited to the circle shape but can be an arrangement in which a plurality of projections are arranged on the firstpressed surface 3 a in the circumferential direction, if there are no problems in the sealing ability. - Further, the outer
peripheral flange portion 3 is set to have the outer diameter size enabling to define voids in the diameter direction 10 (which is illustrated inFIG. 2 ) between the outerperipheral surface 3 c of the outerperipheral flange portion 3 and the outerperipheral wall 36 a of thehousing attaching portion 36, when the outerperipheral flange portion 3 is attached between thehousings peripheral surface 3 c of the outerperipheral flange portion 3, projections (not illustrated) can be provided and in contact with the outerperipheral wall 36 a of thehousing attaching portion 36. - Further, although the second
pressed surface 3 b of the outerperipheral flange portion 3 can be a flat surface, in this example, a three-dimensional shape 11 in a part on the plane is also provided on the secondpressed surface 3 b. More specifically, the three-dimensional shape 11 is provided as aprojection 12 at a center portion in the diameter direction of the secondpressed surface 3 b. By being provided such aprojection 12, in the attaching state, the voids in thethickness direction 13 is set on the outer peripheral side of theprojection 12 and between the secondpressed surface 3 b of the outerperipheral flange portion 3 and abottom surface 36 d in the opposite side of thehousing attaching portion 36, as illustrated inFIG. 2 . Similar to theaforementioned projection 9, theprojection 12 is formed to have a circle shape in a cross section cut by a plane containing a center axis of the diaphragm illustrated inFIG. 1 . In a plane view viewing from the upper and under sides inFIG. 1 , theprojection 12 is annually formed on the whole periphery of the secondpressed surface 3 b. However, the shape of the plane view of theprojection 12 is not limited to the circle shape but can be a structure in which a plurality of projections are arranged in the circumferential direction, if there are no problems in the sealing ability. - According to the
diaphragm 1 including the aforementioned structure, the three-dimensional shape 7 in a part on the plane, i.e., theprojection 9, is provided on the firstpressed surface 3 a of the outerperipheral flange portion 3. By thisprojection 9, the voids in thethickness direction 8 is defined on the outer peripheral side of theprojection 9 and between the firstpressed surface 3 a of the outerperipheral flange portion 3 and thebottom surface 36 c of thehousing attaching portion 36. The voids in the thickness direction 8_has a size enabling to absorb the elastic deformation of the outerperipheral flange portion 3 by the compression in the vertical direction illustrated inFIGS. 1 and 2 , when thediaphragm 1 is attached between thefirst housing 31A and thesecond housing 31B. Therefore, even when the outerperipheral flange portion 3 is compressed and deformed, the influence hardly reaches to thefilm portion 2, so that the generation of rising upward phenomenon of thefilm portion 2, which is illustrated inFIG. 6(C) , can be prevented. In addition, the voids in thethickness direction 8 can be provided not only on the outer peripheral side but also the inner peripheral side. - Further, in the present examples, the voids in the
diameter direction 10 are defined between the outerperipheral surface 3 c of the outerperipheral flange portion 3 and the outerperipheral wall 36 a of thehousing attaching portion 36 together with aforementioned voids in thethickness direction 8. The voids in thediameter direction 10 absorbs a part of the elastic deformation of the outerperipheral flange portion 3 generated by the vertical compression illustrated inFIGS. 1 and 2 , when thediaphragm 1 is attached between thefirst housing 31A andsecond housing 31B. By adding the voids in thediameter direction 10 to the voids in thethickness direction 8, the voids absorbing the elastic deformation of the outerperipheral flange portion 3 can be more enlarged, and the generation of the rising upward of thefilm portion 2 can be more easily prevented. - Furthermore, in the present examples, together with the aforementioned voids, the three-
dimensional shape 11, i.e., theprojection 12 is also provided on the secondpressed surface 3 b of the outerperipheral flange portion 3, so that the voids in thethickness direction 13 is defined on the outer peripheral side of theprojection 12 and between the secondpressed surface 3 b and thebottom surface 36 b of thehousing attaching portion 36. The voids in thethickness direction 13 also absorbs a part of the elastic deformation of the outerperipheral flange portion 3 by the compression in the vertical direction illustrated inFIGS. 1 and 2 , when thediaphragm 1 is attached between thefirst housing 31A and thesecond housing 31B. In addition to the voids in thethickness direction 8 and the voids in thediameter direction 10, the voids in thethickness direction 13 can enlarge more the voids absorbing the elastic deformation of the outerperipheral flange portion 3, so that the generation of rising upward of thefilm portion 2 can be more easily prevented. In addition, the voids in thethickness direction 13 can be defined not only on the outer peripheral side of theprojection 12 but also on the inner peripheral side of theprojection 12. - Further, as for the projected portion, such as, the
projections dimensional shapes pressed surface 3 a or the secondpressed surface 3 b of the outerperipheral flange portion 3. In this case, the voids in thethickness direction projections - Further, the three-
dimensional shape projections peripheral flange portion 3 and the bottom surfaces 36 c and 36 d of thehousing attaching portion 36, while being in the state that the firstpressed surface 3 a or the secondpressed surface 3 b of the outerperipheral flange portion 3 are directly in contact with thebottom surface housing attaching portion 36 and compressed. There also can be a case in which a plurality of recessed portions are arrange in parallel. InFIG. 3 andFIG. 4 illustrated as another example, the three-dimensional shape 11 in the upper side in figures is formed on the secondpressed surface 3 b by a groove-shaped recessedportion 14, in the upper and lower three-dimensional shapes - In addition, the aforementioned each voids 8, 10, and 13 act as the refuge of the rubber-like elastic body when the outer
peripheral flange portion 3 is sandwiched between thehousings
Claims (9)
1-5. (canceled)
6. A diaphragm comprising a flexible film portion and an outer peripheral flange portion integrally provided on a peripheral edge of the film portion,
wherein at least a portion of one surface in the thickness direction of the film portion and at least a portion of one end surface in the thickness direction of the outer peripheral flange portion are arranged on the same plane to be a flat surface,
wherein another end surface in the thickness direction of the outer peripheral flange portion protrudes more in the thickness direction than another surface in the thickness direction of the film portion,
wherein, when the diaphragm is attached between a pair of a first housing and a second housing, the outer peripheral flange portion becomes to be a state compressed between the first housing and the second housing, and the film portion becomes to be a state in which one surface of the film portion in the thickness direction is in contact with the first housing over the approximately whole surface of the one surface of the film portion,
wherein the one end surface in the thickness direction of the outer peripheral flange portion includes a first pressed surface contacting the first housing, and a three dimensional shape comprising a projected portion or a recessed portion is provided on the first pressed surface,
wherein, when the outer peripheral flange portion is compressed in the thickness direction between a pair of the first housing and the second housing, the three-dimensional shape defines voids in the thickness direction between the outer peripheral flange portion and the first housing,
wherein the voids in the thickness direction absorbs compression and deformation of the outer peripheral flange portion, so that the influence of the compression and deformation hardly reaches to the film portion, and rising upward of the film portion from the first housing is prevented.
7. The diaphragm according to claim 6 ,
wherein the three-dimensional shape is an annular projection provided on a center portion in the diameter direction of the first pressed surface,
wherein, when the outer peripheral flange portion is attached to the first housing and the second housing while being compressed and deformed therebetween, the three-dimensional shape defines voids in the diameter direction on the more outer side than the annular projection on the first pressed surface.
8. The diaphragm according to claim 6 ,
wherein, when the outer peripheral flange portion is attached between the first housing and the second housing, the outer peripheral flange portion is set to have an outer diameter size enabling to define voids in the diameter direction between the outer peripheral surface of the outer peripheral flange portion and at least one of the first housing and the second housing, in the diameter direction of the diaphragm.
9. The diaphragm according to claim 6 ,
wherein the outer peripheral flange portion includes a second pressed surface and a three-dimensional shape,
wherein the second pressed surface is another surface in the thickness direction of the diaphragm and is pressed by the second housing,
wherein the three-dimensional shape includes a projected portion or a recessed portion on the second pressed surface.
10. A diaphragm supporting structure sandwiching a diaphragm by a first housing and a second housing,
wherein the diaphragm supporting structure includes the diaphragm according to claim 6 as the diaphragm.
11. The diaphragm according to claim 7 ,
wherein, when the outer peripheral flange portion is attached between the first housing and the second housing, the outer peripheral flange portion is set to have an outer diameter size enabling to define voids in the diameter direction between the outer peripheral surface of the outer peripheral flange portion and at least one of the first housing and the second housing, in the diameter direction of the diaphragm.
12. The diaphragm according to claim 8 ,
wherein the outer peripheral flange portion includes a second pressed surface and a three-dimensional shape,
wherein the second pressed surface is another surface in the thickness direction of the diaphragm and is pressed by the second housing,
wherein the three-dimensional shape includes a projected portion or a recessed portion on the second pressed surface.
13. A diaphragm supporting structure sandwiching a diaphragm by a first housing and a second housing,
wherein the diaphragm supporting structure includes the diaphragm according to claim 9 as the diaphragm.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010074546A JP5369037B2 (en) | 2010-03-29 | 2010-03-29 | Diaphragm |
JP2010-074546 | 2010-03-29 | ||
PCT/JP2011/057082 WO2011122424A1 (en) | 2010-03-29 | 2011-03-24 | Diaphragm |
Publications (1)
Publication Number | Publication Date |
---|---|
US20130014639A1 true US20130014639A1 (en) | 2013-01-17 |
Family
ID=44712133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/637,877 Abandoned US20130014639A1 (en) | 2010-03-29 | 2011-03-24 | Diaphragm |
Country Status (4)
Country | Link |
---|---|
US (1) | US20130014639A1 (en) |
JP (1) | JP5369037B2 (en) |
CN (1) | CN102822573B (en) |
WO (1) | WO2011122424A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150167853A1 (en) * | 2012-05-30 | 2015-06-18 | Kabushiki Kaisha Fujikin | Diaphragm and Diaphragm Valve |
US9303772B2 (en) | 2012-02-24 | 2016-04-05 | Advics Co., Ltd. | Diaphragm device and pressure regulating reservoir using the same |
US20180373274A1 (en) * | 2017-06-27 | 2018-12-27 | Walbro Llc | Diaphragm regulator for higher pressure input gas |
WO2019115027A1 (en) * | 2017-12-15 | 2019-06-20 | Wabco Europe Bvba | Membrane valve assembly for a compressed air braking system |
US11156219B2 (en) * | 2015-11-10 | 2021-10-26 | Repligen Corporation | Disposable alternating tangential flow filtration units |
US11391392B2 (en) | 2018-04-23 | 2022-07-19 | Rain Bird Corporation | Valve with reinforcement ports and manually removable scrubber |
US11549596B2 (en) * | 2017-01-19 | 2023-01-10 | Neoperl Gmbh | Diaphragm valve |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013238254A (en) * | 2012-05-11 | 2013-11-28 | Advics Co Ltd | Diaphragm device and pressure control reservoir using the same |
DK2818960T3 (en) * | 2013-06-24 | 2019-03-04 | Danfoss As | Dynamic valve diaphragm |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2623950A1 (en) * | 1976-05-28 | 1977-12-01 | Integral Hydraulik Langen & Co | Hydropneumatic pressure store - contains dividing membrane of solution resistant material with additional sealing ring |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5667457U (en) * | 1979-10-29 | 1981-06-04 | ||
JPH0627876Y2 (en) * | 1988-12-27 | 1994-07-27 | エヌオーケー株式会社 | Diaphragm |
JP2002022011A (en) * | 2000-07-07 | 2002-01-23 | Nok Corp | Diaphragm |
JP5060196B2 (en) * | 2007-08-01 | 2012-10-31 | 倉敷化工株式会社 | Diaphragm |
CN201202080Y (en) * | 2008-05-14 | 2009-03-04 | 赵慧江 | Rubber barrier diaphragm for hydraulic breaking hammer energy accumulator |
JP5304446B2 (en) * | 2008-08-28 | 2013-10-02 | 株式会社アドヴィックス | Pressure regulating reservoir |
-
2010
- 2010-03-29 JP JP2010074546A patent/JP5369037B2/en active Active
-
2011
- 2011-03-24 CN CN201180016086.1A patent/CN102822573B/en active Active
- 2011-03-24 US US13/637,877 patent/US20130014639A1/en not_active Abandoned
- 2011-03-24 WO PCT/JP2011/057082 patent/WO2011122424A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2623950A1 (en) * | 1976-05-28 | 1977-12-01 | Integral Hydraulik Langen & Co | Hydropneumatic pressure store - contains dividing membrane of solution resistant material with additional sealing ring |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9303772B2 (en) | 2012-02-24 | 2016-04-05 | Advics Co., Ltd. | Diaphragm device and pressure regulating reservoir using the same |
US20150167853A1 (en) * | 2012-05-30 | 2015-06-18 | Kabushiki Kaisha Fujikin | Diaphragm and Diaphragm Valve |
US9423037B2 (en) * | 2012-05-30 | 2016-08-23 | Kabushiki Kaisha Fujikin | Diaphragm with flange and annular ridge and diaphragm valve using the same |
US11156219B2 (en) * | 2015-11-10 | 2021-10-26 | Repligen Corporation | Disposable alternating tangential flow filtration units |
US20220008803A1 (en) * | 2015-11-10 | 2022-01-13 | Repligen Corporation | Disposable Alternating Tangential Flow Filtration Units |
US11549596B2 (en) * | 2017-01-19 | 2023-01-10 | Neoperl Gmbh | Diaphragm valve |
US20180373274A1 (en) * | 2017-06-27 | 2018-12-27 | Walbro Llc | Diaphragm regulator for higher pressure input gas |
WO2019115027A1 (en) * | 2017-12-15 | 2019-06-20 | Wabco Europe Bvba | Membrane valve assembly for a compressed air braking system |
US11391392B2 (en) | 2018-04-23 | 2022-07-19 | Rain Bird Corporation | Valve with reinforcement ports and manually removable scrubber |
Also Published As
Publication number | Publication date |
---|---|
CN102822573B (en) | 2015-05-13 |
JP5369037B2 (en) | 2013-12-18 |
WO2011122424A1 (en) | 2011-10-06 |
JP2011208675A (en) | 2011-10-20 |
CN102822573A (en) | 2012-12-12 |
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AS | Assignment |
Owner name: NOK CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TAKESHITA, SHUJI;SHIGETA, KAZUMA;AOBA, KOJI;SIGNING DATES FROM 20120908 TO 20120912;REEL/FRAME:029039/0317 Owner name: ADVICS CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TAKESHITA, SHUJI;SHIGETA, KAZUMA;AOBA, KOJI;SIGNING DATES FROM 20120908 TO 20120912;REEL/FRAME:029039/0317 |
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