US20050248195A1 - Adjustable chair - Google Patents
Adjustable chair Download PDFInfo
- Publication number
- US20050248195A1 US20050248195A1 US10/709,123 US70912304A US2005248195A1 US 20050248195 A1 US20050248195 A1 US 20050248195A1 US 70912304 A US70912304 A US 70912304A US 2005248195 A1 US2005248195 A1 US 2005248195A1
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- United States
- Prior art keywords
- leg
- insert
- threaded
- extension
- chair
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/002—Chair or stool bases
- A47C7/008—Chair or stool bases for uneven surfaces
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B91/00—Feet for furniture in general
- A47B91/02—Adjustable feet
- A47B91/022—Adjustable feet using screw means
- A47B91/024—Foot attached to a rotating bolt supported in an internal thread
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/20—Chairs or stools with vertically-adjustable seats
- A47C3/24—Chairs or stools with vertically-adjustable seats with vertical spindle
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/20—Chairs or stools with vertically-adjustable seats
- A47C3/40—Telescopic guides
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C4/00—Foldable, collapsible or dismountable chairs
- A47C4/02—Dismountable chairs
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C4/00—Foldable, collapsible or dismountable chairs
- A47C4/02—Dismountable chairs
- A47C4/03—Non-upholstered chairs, e.g. metal, plastic or wooden chairs
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C5/00—Chairs of special materials
- A47C5/12—Chairs of special materials of plastics, with or without reinforcement
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K3/00—Baths; Douches; Appurtenances therefor
- A47K3/12—Separate seats or body supports
- A47K3/122—Seats
Definitions
- the present invention relates to chairs having a height adjustment. It finds particular application in conjunction with bathing chairs and will be described with particular reference thereto. It will be appreciated, however, that the invention is also amenable to other applications.
- Adjustable chairs are useful for assisting disabled persons while bathing. Depending on the type and/or severity of the disability, a person may prefer or have no choice but to sit while bathing. In this case, it is desirable to use a chair having a seat easily adjustable to various heights. Furthermore, because the terrain of the bathing area (e.g., a tub or shower) may be uneven, it is also desirable that the legs be independently adjustable to accommodate even slight irregularities in the surface of the bathing area while ensuring that the seat is level (e.g., parallel to the ground).
- the terrain of the bathing area e.g., a tub or shower
- the legs be independently adjustable to accommodate even slight irregularities in the surface of the bathing area while ensuring that the seat is level (e.g., parallel to the ground).
- One conventional chair used for assisting disabled persons while bathing includes a leg having an upper portion secured to an underside of a seat.
- a continuously threaded section extends from the upper portion of the leg.
- a lower portion of the leg includes a hollow cavity with continuous threads that mate with the threaded section of the upper portion.
- the threaded section of the upper portion is screwed into the cavity of the lower portion until a desired height of the seat is attained.
- the height of the seat is adjusted by turning (e.g., screwing and/or unscrewing) the threaded section of the upper portion to a new position within the cavity.
- the seat portions of conventional bathing seats are not curved in a way that creates a perception of a more accommodating seat.
- the present invention provides a new and improved apparatus and method which addresses the above-referenced problems.
- an adjustable leg for a chair includes a leg housing, secured to a seat, that includes a threaded inner wall.
- a leg extension is received into the leg housing and includes external threaded portions that mate with the threaded inner wall.
- a tab in the leg housing cooperates with the external threaded portions and secures the leg extension at a predefined position in the leg housing.
- an adjustable leg for a chair in another embodiment, includes a leg housing secured to a seat.
- An insert is secured in the leg housing and includes a threaded inner wall.
- a leg extension is received into the insert and includes external threaded portions that mate with the threaded inner wall.
- a depression is defined between the threaded portions.
- a tab on the insert cooperates with the threaded portions and the depression. The leg extension is secured at a predefined position in the insert when the tab is in the depression.
- a chair has an adjustable leg.
- the leg includes an upper leg portion secured to a seat.
- An insert is secured in the upper leg portion and includes a threaded inner wall.
- a lower leg portion is received in the insert and includes a partial external threaded portion, which mates with the threaded inner wall, and a valley.
- a means provides visual and tactile feedback to a user when the lower leg portion is at a predetermined position in the upper leg portion.
- an adjustable leg for a chair in another embodiment, includes a leg housing secured to a seat.
- a leg extension is received into the housing and includes external threaded portions that mate with a threaded inner wall of the leg housing.
- a plurality of indices are between the threaded portions on the leg extension.
- a locking mechanism is associated with the leg housing. Preset positions of the leg extension within the housing are determined as a function of respective ones of the indices being engaged with the locking mechanism.
- a method for adjusting a leg of a chair includes rotating a leg extension within an insert that is secured within a leg housing. External threaded portions of the leg extension mate with a threaded inner wall of the insert as the leg extension is rotated. When the leg extension is at a predefined position in the insert, a tab on an inner surface of the insert engages in a valley between the threaded portions.
- FIG. 1 illustrates an exploded view of a chair in accordance with one embodiment of the present invention
- FIG. 2 illustrates a top of the seat portion in accordance with one embodiment of the present invention
- FIG. 3 illustrates a bottom of the seat portion in accordance with one embodiment of the present invention
- FIGS. 4-17 illustrate various cross-sectional views through the bottom of the seat portion in FIG. 3 ;
- FIG. 18 illustrates an exploded view of a leg housing, an insert, and a leg extension in accordance with one embodiment of the present invention
- FIG. 19 illustrates a sectional view of the insert in accordance with one embodiment of the present invention.
- FIG. 20 illustrates the leg insert in accordance with one embodiment of the present invention
- FIG. 21 illustrates another embodiment of the present invention.
- FIG. 22 illustrates another embodiment of the present invention.
- a chair 10 includes a seat portion 12 , a back portion 14 , and a plurality of leg housings 16 a , 16 b , 16 c , 16 d secured to the seat portion 12 .
- leg housings 16 a , 16 b , 16 c , 16 d are shown in the illustrated embodiment, it is to be understood that other numbers of leg housings are also contemplated.
- a plurality of leg extensions 20 a , 20 b , 20 c , 20 d are received in respective inserts 18 a , 18 b , 18 c , 18 d , which are secured in the leg housings 16 a , 16 b , 16 c , 16 d.
- a top portion 22 of the seat portion 12 includes a plurality of holes 24 for providing drainage.
- a plurality (e.g., two (2)) of hand grips 26 a , 26 b are also provided.
- a bottom portion 30 of the seat portion 12 includes a plurality of housing receiving portions 32 a , 32 b , 32 c , 32 d , which are designed to mate with an upper portion 34 a (see FIG. 16 ) of the leg housing 16 a (see FIG. 18 ).
- FIGS. 4-7 illustrate cross-sectional views of the housing receiving portion 32 a .
- FIGS. 8-11 illustrate cross-sectional views of the housing receiving portion 32 b .
- FIGS. 12 and 13 illustrate cross-sectional views of the housing receiving portion 32 c .
- FIGS. 14 and 15 illustrate cross-sectional views of the housing receiving portion 32 d.
- each of the housing receiving portions 32 a , 32 b , 32 c , 32 d is a pocket having a triangular lobe geometry.
- Each of the pockets is deep enough (e.g., at least about 2.0 inches deep) for providing adequate contact area between the housing receiving portions 32 a , 32 b , 32 c , 32 d and the respective leg housings 16 a , 16 b , 16 c , 16 d to increase lateral stability.
- the pocket design of the housing receiving portions 32 a , 32 b , 32 c , 32 d provides for easy interchangeability between various leg extensions 20 a , 20 b , 20 c , 20 d (see FIG. 1 ) (e.g., leg extensions made from different materials such as composite materials and/or metals including aluminum).
- FIGS. 16 and 17 illustrate cross-sectional views through the seat portion 12 .
- a seating surface 33 of the seat portion 12 is dished in such a fashion that a center 33 a of the seating surface 33 is lower than an outer edge 33 b of the seating surface 33 .
- a depth 35 (front to back) of the seating surface 33 area is less than a width 37 (side to side) of the seating surface 33 area.
- the gradual radius and seating surface proportions provides a smooth and comfortable surface that cradles the user.
- the center 33 a of the seating surface 33 is lower than the outer edge 33 b by about 0.875 inches, the depth 35 is about 75% of the width 37 , and the dished surface is radius at about 60 inches; however, other embodiments, which include other dimensions, are also contemplated.
- FIG. 18 illustrates a perspective view of the leg housing 16 a , the insert 18 a , the leg extension 20 a , and a tip portion 36 a , which is secured to a bottom of the insert 18 a .
- the top portion 34 a includes locking tabs (one of which is illustrated as 40 a and one of which is not shown).
- the locking tabs 40 a cooperate with openings 42 a 1 , 42 a 2 (see FIGS. 3-5 ) in the respective housing receiving portion 32 a (without the use of tools) to secure the leg housing 16 a to the housing receiving portion 32 a .
- the locking tabs 40 a are biased in an outward direction from the housing receiving portion 32 a to facilitate engagement in the openings 42 a 1 , 42 a 2 .
- the locking tabs 40 a are of a sufficient length and positioned on substantially opposite sides of the top portion 34 a for facilitating disengagement of the top portion 34 a from the housing receiving portion 32 a when a user merely uses a single hand for performing the disengagement.
- the tip portion 36 a is a non-skid material (e.g., a material that may be injection molded as a soft substance such as rubber or Sarlink from DSM, Inc.) that improves traction with a ground surface.
- the insert 18 a includes a plurality (e.g., two (2)) portions 18 a 1 , 18 a 2 .
- Each of the portions 18 a 1 , 18 a 2 includes an internally threaded wall portion 44 a 1 , 44 a 2 .
- one of the portions 44 a 2 includes a flexing portion 46 (see FIG. 19 ) and a tab 50 (see FIG. 19 ) (locking device or mechanism) on the inner wall.
- the tab 50 includes a well (recessed portion), which is defined by walls of the flexing portion 46 .
- the portions 18 a 1 , 18 a 2 are assembled together to form the insert 18 .
- the internally threaded wall portions cooperate to form a continuous internally threaded wall on the insert 18 .
- the tab 50 is biased toward a center of the insert 18 by the flexing portion 46 .
- the insert 18 a is frictionally secured in a cavity at the bottom end of the leg housing 16 a.
- the leg extension 20 a includes a plurality (e.g., two (2)) of external threaded portions 52 a 1 , 52 a 2 and a plurality of indicators 54 (indices), which are positioned along a longitudinal axis of the leg extension 20 a and between the threaded portions 52 a 1 , 52 a 2 .
- the threaded portions 52 a 1 , 52 a 2 are raised with respect to a remainder of the portion 56 (e.g., valley or depression) between the threaded portions 52 a 1 , 52 a 2 .
- the indicators 54 are also raised with respect to the portion 56 .
- the threaded portions 52 a 1 , 52 a 2 of the leg extension 20 a are sized for mating with the internally threaded wall of the insert 18 a (see FIG. 18 ). Therefore, the leg extension 20 a is drawn into (or extended from) the insert 18 a (see FIG. 18 ) and the leg housing 16 a (see FIG. 18 ) as the leg extension 20 a is rotated.
- the leg extension 20 a also includes a collar 58 , which abuts the insert 18 (see FIG. 18 ) when the leg extension 20 a is fully extended from the housing 16 a (see FIG. 18 ). In this manner, the collar 58 prevents the leg extension 20 a from being completely unscrewed from the housing (see FIG. 18 ).
- the tab 50 rides on (over) the threaded portions 52 a 1 , 52 a 2 and also rides in the portion 56 between the threaded portions 52 a 1 , 52 a 2 .
- the edges of the threaded portions 52 a 1 , 52 a 2 are sloped to cooperate with the oncoming edge of the tab 50 as the leg extension 20 a is rotated into the insert 18 a .
- the tab 50 rides over one of the threaded portions 52 a 1 , into the space 56 between the threaded portions 52 a 1 , 52 a 2 , and then over the other of the threaded portions 52 a 2 .
- the sloped edges of the threaded portions 52 a 1 , 52 a 2 ease the transition of the tab 50 from the space 56 between the threaded portions to the next threaded portion 52 a 1 , 52 a 2 .
- a user screwing the leg extension 20 a into the insert 18 a feels resistance as the tab 50 transitions from one of the threaded portions 52 a 1 , 52 a 2 , to the space 56 between the threaded portions, and then to the other of the threaded portions 52 a 1 , 52 a 2 .
- the leg extension 20 a is secured in the insert 18 a when the tab 50 is in the space 56 between the threaded portions 52 a 1 , 52 a 2 .
- the number of the indicators 54 exposed from the insert 18 a represent a length of the leg extension 20 a extending from the insert 18 a.
- the well defined by the tab 50 is sized to be seated over and surround the indicators 54 included on the leg extension 20 a . More specifically, as the tab 50 encounters the first one of the indicators 54 , the flexing portion 46 causes the first wall of the tab 50 to move over the indicator 54 (index). Then, as the user continues to turn the leg extension 20 a , the indicator 54 becomes removably secured in the well between the two walls of the tab 50 . The respective indicators 54 become secured in the tab 50 at predetermined (preset) positions in the insert 18 a (and the leg housing 16 a ). Therefore, a length of the leg extension 20 a extending from the leg housing 16 a is related to the indicator 54 secured by the tab 50 .
- the user may determine the length of the leg extension 20 a extending from the leg housing 16 a by observing which one of the indicators 54 is secured by the tab 50 . Then, the user may determine the length of the leg extension 20 a extending from the leg housing 16 a as a function of the indicator 54 secured by the tab 50 .
- the indicator 54 When the indicator 54 is secured in the well defined by the tab 50 , the user feels resistance when turning the leg extension 20 a . By exerting enough force, the user can turn through the resistance so that the indicator 54 is disengaged from the tab 50 and the tab 50 begins riding over the next one of the threaded portions 52 a 1 , 52 a 2 . The increased resistance the user feels as the tab 50 encounters the indicators 54 provide a means of tactile feedback to the user regarding the amount of the leg extension 20 a extending from the leg housing 16 a . Furthermore, in one embodiment, the indicators 54 are numbers in numerical order that provide a means of visual feedback to the user regarding the amount of the leg extension 20 a extending from the leg housing 16 a.
- the respective indicators 54 on the various leg extensions 20 a , 20 b , 20 c , 20 d will be utilized by the user to adjust all of the legs to a common height.
- the tabs 50 on the respective leg housings 16 a , 16 b , 16 c , 16 d are secured over a corresponding one of the indicators 54 on each of the leg extensions 20 , the seat portion 12 will be substantially level if the chair 10 is placed on a level surface.
- leg housings 16 a Although only one of the leg housings 16 a , inserts 18 a , and extensions 20 a have been illustrated, it is to be understood the other leg housings, inserts, and extensions are assembled in a similar manner.
- Each of the top portions 34 a , 34 b , 34 c , 34 d is shaped to fit within the respective housing receiving portions 32 a , 32 b , 32 c , 32 d (see FIG. 3 ) in a single orientation, thereby helping to assure correct assembly. Furthermore the top portions 34 a , 34 b , 34 c , 34 d are shaped as triangular lobes including straight, flat surfaces for distributing forces in the leg housings 16 a , 16 b , 16 c , 16 d and the leg extensions 20 a , 20 b , 20 c , 20 d , which are generated by a user moving on the seat portion 12 (see FIG. 1 ).
- FIG. 21 illustrates another embodiment of the present invention.
- like components are designated by like numerals with a primed (′) suffix and new components are designated by new numerals.
- a leg housing 60 includes an internally threaded wall 62 . Therefore, the leg extension 20 ′ screws directly into the leg housing 60 .
- a locking mechanism 64 (tab) on the leg housing 60 interacts with the depression between threaded portions on the leg extension 20 ′ as described above.
- FIG. 22 illustrates another embodiment of the present invention.
- telescoping legs 70 a , 70 b , 70 c , 70 d made from a non-composite material include respective upper portions 72 a , 72 b , 72 c , 72 d having the triangular lobe shape for mating with the housing receiving portions 32 a , 32 b , 32 c , 32 d (see FIG. 3 ).
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Abstract
Description
- The present invention relates to chairs having a height adjustment. It finds particular application in conjunction with bathing chairs and will be described with particular reference thereto. It will be appreciated, however, that the invention is also amenable to other applications.
- Adjustable chairs are useful for assisting disabled persons while bathing. Depending on the type and/or severity of the disability, a person may prefer or have no choice but to sit while bathing. In this case, it is desirable to use a chair having a seat easily adjustable to various heights. Furthermore, because the terrain of the bathing area (e.g., a tub or shower) may be uneven, it is also desirable that the legs be independently adjustable to accommodate even slight irregularities in the surface of the bathing area while ensuring that the seat is level (e.g., parallel to the ground).
- One conventional chair used for assisting disabled persons while bathing includes a leg having an upper portion secured to an underside of a seat. A continuously threaded section extends from the upper portion of the leg. A lower portion of the leg includes a hollow cavity with continuous threads that mate with the threaded section of the upper portion. The threaded section of the upper portion is screwed into the cavity of the lower portion until a desired height of the seat is attained. Furthermore, the height of the seat is adjusted by turning (e.g., screwing and/or unscrewing) the threaded section of the upper portion to a new position within the cavity.
- Although the mating threads on the respective portions of the legs provide a means for adjusting a height of the seat, no means for indexing the height of the legs and/or comparing the height of one leg of the chair with respect to any of the other legs is provided. Therefore, assembling the chair to sit on a relatively flat surface requires a trial-by-error approach whereby a user makes a first attempt at adjusting the legs to achieve a level seat. Then, the user places the chair on the ground and makes the necessary adjustments to the heights of the respective legs until the seat is level and, furthermore, the desired height of the seat is achieved. Obviously, this multi-step process of leveling the seat at a desired height is cumbersome.
- Furthermore, conventional bathing chairs having independently attachable legs do not offer desired levels of stability.
- Also, the seat portions of conventional bathing seats are not curved in a way that creates a perception of a more accommodating seat.
- The present invention provides a new and improved apparatus and method which addresses the above-referenced problems.
- In one embodiment, an adjustable leg for a chair includes a leg housing, secured to a seat, that includes a threaded inner wall. A leg extension is received into the leg housing and includes external threaded portions that mate with the threaded inner wall. A tab in the leg housing cooperates with the external threaded portions and secures the leg extension at a predefined position in the leg housing.
- In another embodiment, an adjustable leg for a chair includes a leg housing secured to a seat. An insert is secured in the leg housing and includes a threaded inner wall. A leg extension is received into the insert and includes external threaded portions that mate with the threaded inner wall. A depression is defined between the threaded portions. A tab on the insert cooperates with the threaded portions and the depression. The leg extension is secured at a predefined position in the insert when the tab is in the depression.
- In another embodiment, a chair has an adjustable leg. The leg includes an upper leg portion secured to a seat. An insert is secured in the upper leg portion and includes a threaded inner wall. A lower leg portion is received in the insert and includes a partial external threaded portion, which mates with the threaded inner wall, and a valley. A means provides visual and tactile feedback to a user when the lower leg portion is at a predetermined position in the upper leg portion.
- In another embodiment, an adjustable leg for a chair includes a leg housing secured to a seat. A leg extension is received into the housing and includes external threaded portions that mate with a threaded inner wall of the leg housing. A plurality of indices are between the threaded portions on the leg extension. A locking mechanism is associated with the leg housing. Preset positions of the leg extension within the housing are determined as a function of respective ones of the indices being engaged with the locking mechanism.
- In another embodiment, a method for adjusting a leg of a chair includes rotating a leg extension within an insert that is secured within a leg housing. External threaded portions of the leg extension mate with a threaded inner wall of the insert as the leg extension is rotated. When the leg extension is at a predefined position in the insert, a tab on an inner surface of the insert engages in a valley between the threaded portions.
- In the accompanying drawings which are incorporated in and constitute a part of the specification, embodiments of the invention are illustrated, which, together with a general description of the invention given above, and the detailed description given below, serve to exemplify the embodiments of this invention.
-
FIG. 1 illustrates an exploded view of a chair in accordance with one embodiment of the present invention; -
FIG. 2 illustrates a top of the seat portion in accordance with one embodiment of the present invention; -
FIG. 3 illustrates a bottom of the seat portion in accordance with one embodiment of the present invention; -
FIGS. 4-17 illustrate various cross-sectional views through the bottom of the seat portion inFIG. 3 ; -
FIG. 18 illustrates an exploded view of a leg housing, an insert, and a leg extension in accordance with one embodiment of the present invention; -
FIG. 19 illustrates a sectional view of the insert in accordance with one embodiment of the present invention; -
FIG. 20 illustrates the leg insert in accordance with one embodiment of the present invention; -
FIG. 21 illustrates another embodiment of the present invention; and -
FIG. 22 illustrates another embodiment of the present invention. - With reference to
FIG. 1 , achair 10 according to the present invention includes aseat portion 12, aback portion 14, and a plurality ofleg housings seat portion 12. Although four (4)leg housings leg extensions respective inserts leg housings - With reference to
FIG. 2 , atop portion 22 of theseat portion 12 includes a plurality ofholes 24 for providing drainage. A plurality (e.g., two (2)) ofhand grips - With reference to
FIG. 3 , abottom portion 30 of theseat portion 12 includes a plurality ofhousing receiving portions upper portion 34 a (seeFIG. 16 ) of theleg housing 16 a (seeFIG. 18 ).FIGS. 4-7 illustrate cross-sectional views of thehousing receiving portion 32 a.FIGS. 8-11 illustrate cross-sectional views of thehousing receiving portion 32 b.FIGS. 12 and 13 illustrate cross-sectional views of thehousing receiving portion 32 c.FIGS. 14 and 15 illustrate cross-sectional views of thehousing receiving portion 32 d. - With reference again to
FIG. 3 , each of thehousing receiving portions housing receiving portions respective leg housings housing receiving portions various leg extensions FIG. 1 ) (e.g., leg extensions made from different materials such as composite materials and/or metals including aluminum). -
FIGS. 16 and 17 illustrate cross-sectional views through theseat portion 12. Aseating surface 33 of theseat portion 12 is dished in such a fashion that acenter 33 a of theseating surface 33 is lower than anouter edge 33 b of theseating surface 33. Also, a depth 35 (front to back) of theseating surface 33 area is less than a width 37 (side to side) of theseating surface 33 area. The gradual radius and seating surface proportions provides a smooth and comfortable surface that cradles the user. In one embodiment, thecenter 33 a of theseating surface 33 is lower than theouter edge 33 b by about 0.875 inches, thedepth 35 is about 75% of thewidth 37, and the dished surface is radius at about 60 inches; however, other embodiments, which include other dimensions, are also contemplated. -
FIG. 18 illustrates a perspective view of theleg housing 16 a, theinsert 18 a, theleg extension 20 a, and atip portion 36 a, which is secured to a bottom of theinsert 18 a. Thetop portion 34 a includes locking tabs (one of which is illustrated as 40 a and one of which is not shown). The lockingtabs 40 a cooperate with openings 42 a 1, 42 a 2 (seeFIGS. 3-5 ) in the respectivehousing receiving portion 32 a (without the use of tools) to secure theleg housing 16 a to thehousing receiving portion 32 a. The lockingtabs 40 a are biased in an outward direction from thehousing receiving portion 32 a to facilitate engagement in the openings 42 a 1, 42 a 2. In the illustrated embodiment, the lockingtabs 40 a are of a sufficient length and positioned on substantially opposite sides of thetop portion 34 a for facilitating disengagement of thetop portion 34 a from thehousing receiving portion 32 a when a user merely uses a single hand for performing the disengagement. In one embodiment, thetip portion 36 a is a non-skid material (e.g., a material that may be injection molded as a soft substance such as rubber or Sarlink from DSM, Inc.) that improves traction with a ground surface. - In the illustrated embodiment, the
insert 18 a includes a plurality (e.g., two (2))portions 18 a 1, 18 a 2. Each of theportions 18 a 1, 18 a 2 includes an internally threaded wall portion 44 a 1, 44 a 2. Furthermore, one of the portions 44 a 2 includes a flexing portion 46 (seeFIG. 19 ) and a tab 50 (seeFIG. 19 ) (locking device or mechanism) on the inner wall. In one embodiment, thetab 50 includes a well (recessed portion), which is defined by walls of the flexingportion 46. Theportions 18 a 1, 18 a 2 are assembled together to form the insert 18. When theportions 18 a 1, 18 a 2 are secured together, the internally threaded wall portions cooperate to form a continuous internally threaded wall on the insert 18. Also, thetab 50 is biased toward a center of the insert 18 by the flexingportion 46. Theinsert 18 a is frictionally secured in a cavity at the bottom end of theleg housing 16 a. - With reference to
FIG. 20 , theleg extension 20 a includes a plurality (e.g., two (2)) of external threaded portions 52 a 1, 52 a 2 and a plurality of indicators 54 (indices), which are positioned along a longitudinal axis of theleg extension 20 a and between the threaded portions 52 a 1, 52 a 2. The threaded portions 52 a 1, 52 a 2 are raised with respect to a remainder of the portion 56 (e.g., valley or depression) between the threaded portions 52 a 1, 52 a 2. In one embodiment, theindicators 54 are also raised with respect to theportion 56. The threaded portions 52 a 1, 52 a 2 of theleg extension 20 a are sized for mating with the internally threaded wall of theinsert 18 a (seeFIG. 18 ). Therefore, theleg extension 20 a is drawn into (or extended from) theinsert 18 a (seeFIG. 18 ) and theleg housing 16 a (seeFIG. 18 ) as theleg extension 20 a is rotated. Theleg extension 20 a also includes acollar 58, which abuts the insert 18 (seeFIG. 18 ) when theleg extension 20 a is fully extended from thehousing 16 a (seeFIG. 18 ). In this manner, thecollar 58 prevents theleg extension 20 a from being completely unscrewed from the housing (seeFIG. 18 ). - With reference again to
FIG. 18 , as theleg extension 20 a is drawn into theleg housing 16 a, thetab 50 rides on (over) the threaded portions 52 a 1, 52 a 2 and also rides in theportion 56 between the threaded portions 52 a 1, 52 a 2. The edges of the threaded portions 52 a 1, 52 a 2 are sloped to cooperate with the oncoming edge of thetab 50 as theleg extension 20 a is rotated into theinsert 18 a. More specifically, as theleg extension 20 a is rotated into theinsert 18 a and theleg housing 16 a, thetab 50 rides over one of the threaded portions 52 a 1, into thespace 56 between the threaded portions 52 a 1, 52 a 2, and then over the other of the threaded portions 52 a 2. The sloped edges of the threaded portions 52 a 1, 52 a 2 ease the transition of thetab 50 from thespace 56 between the threaded portions to the next threaded portion 52 a 1, 52 a 2. Consequently, a user screwing theleg extension 20 a into theinsert 18 a feels resistance as thetab 50 transitions from one of the threaded portions 52 a 1, 52 a 2, to thespace 56 between the threaded portions, and then to the other of the threaded portions 52 a 1, 52 a 2. - The
leg extension 20 a is secured in theinsert 18 a when thetab 50 is in thespace 56 between the threaded portions 52 a 1, 52 a 2. The number of theindicators 54 exposed from theinsert 18 a represent a length of theleg extension 20 a extending from theinsert 18 a. - In another embodiment, the well defined by the
tab 50 is sized to be seated over and surround theindicators 54 included on theleg extension 20 a. More specifically, as thetab 50 encounters the first one of theindicators 54, the flexingportion 46 causes the first wall of thetab 50 to move over the indicator 54 (index). Then, as the user continues to turn theleg extension 20 a, theindicator 54 becomes removably secured in the well between the two walls of thetab 50. Therespective indicators 54 become secured in thetab 50 at predetermined (preset) positions in theinsert 18 a (and theleg housing 16 a). Therefore, a length of theleg extension 20 a extending from theleg housing 16 a is related to theindicator 54 secured by thetab 50. In other words, the user may determine the length of theleg extension 20 a extending from theleg housing 16 a by observing which one of theindicators 54 is secured by thetab 50. Then, the user may determine the length of theleg extension 20 a extending from theleg housing 16 a as a function of theindicator 54 secured by thetab 50. - When the
indicator 54 is secured in the well defined by thetab 50, the user feels resistance when turning theleg extension 20 a. By exerting enough force, the user can turn through the resistance so that theindicator 54 is disengaged from thetab 50 and thetab 50 begins riding over the next one of the threaded portions 52 a 1, 52 a 2. The increased resistance the user feels as thetab 50 encounters theindicators 54 provide a means of tactile feedback to the user regarding the amount of theleg extension 20 a extending from theleg housing 16 a. Furthermore, in one embodiment, theindicators 54 are numbers in numerical order that provide a means of visual feedback to the user regarding the amount of theleg extension 20 a extending from theleg housing 16 a. - It is expected that the
respective indicators 54 on thevarious leg extensions FIG. 1 ) will be utilized by the user to adjust all of the legs to a common height. For example, if thetabs 50 on therespective leg housings indicators 54 on each of theleg extensions 20, theseat portion 12 will be substantially level if thechair 10 is placed on a level surface. - Although only one of the
leg housings 16 a, inserts 18 a, andextensions 20 a have been illustrated, it is to be understood the other leg housings, inserts, and extensions are assembled in a similar manner. - Each of the
top portions 34 a, 34 b, 34 c, 34 d is shaped to fit within the respectivehousing receiving portions FIG. 3 ) in a single orientation, thereby helping to assure correct assembly. Furthermore thetop portions 34 a, 34 b, 34 c, 34 d are shaped as triangular lobes including straight, flat surfaces for distributing forces in theleg housings leg extensions FIG. 1 ). Because such forces are distributed over a relatively large area, internal stresses acting on thetop portions 34 a, 34 b, 34 c, 34 d are reduced. The flat surfaces also reduce rocking when the user moves on the seat portion, thereby reinforcing the user's perception regarding the stability of the chair. -
FIG. 21 illustrates another embodiment of the present invention. For ease of understanding this embodiment, like components are designated by like numerals with a primed (′) suffix and new components are designated by new numerals. In this embodiment, aleg housing 60 includes an internally threadedwall 62. Therefore, theleg extension 20′ screws directly into theleg housing 60. A locking mechanism 64 (tab) on theleg housing 60 interacts with the depression between threaded portions on theleg extension 20′ as described above. -
FIG. 22 illustrates another embodiment of the present invention. In this embodiment,telescoping legs upper portions housing receiving portions FIG. 3 ). - While the present invention has been illustrated by the description of embodiments thereof, and while the embodiments have been described in considerable detail, it is not the intention of the applicants to restrict or in any way limit the scope of the appended claims to such detail. Additional advantages and modifications will readily appear to those skilled in the art. Therefore, the invention, in its broader aspects, is not limited to the specific details, the representative apparatus, and illustrative examples shown and described. Accordingly, departures may be made from such details without departing from the spirit or scope of the applicant's general inventive concept.
Claims (26)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/709,123 US6957865B1 (en) | 2004-04-14 | 2004-04-14 | Adjustable chair |
CA002495930A CA2495930A1 (en) | 2004-04-14 | 2005-02-03 | Adjustable chair |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/709,123 US6957865B1 (en) | 2004-04-14 | 2004-04-14 | Adjustable chair |
Publications (2)
Publication Number | Publication Date |
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US6957865B1 US6957865B1 (en) | 2005-10-25 |
US20050248195A1 true US20050248195A1 (en) | 2005-11-10 |
Family
ID=35115202
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/709,123 Expired - Lifetime US6957865B1 (en) | 2004-04-14 | 2004-04-14 | Adjustable chair |
Country Status (2)
Country | Link |
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US (1) | US6957865B1 (en) |
CA (1) | CA2495930A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070182221A1 (en) * | 2006-02-03 | 2007-08-09 | Mcconnell Dean E | Child activity center |
EP4115769A4 (en) * | 2021-08-24 | 2023-10-25 | Qingdao Centaury Design Co., Ltd. | Connecting structure and seat |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7549702B2 (en) * | 2007-04-30 | 2009-06-23 | Amg Medical Inc. | Foldable bath seat |
US8262160B2 (en) * | 2008-11-14 | 2012-09-11 | Mehri Mafi | Adjustable padded chair |
US9763545B2 (en) | 2011-03-17 | 2017-09-19 | Evolution Technologies Inc. | Bath chair |
US9149160B2 (en) * | 2011-03-17 | 2015-10-06 | Evolution Technologies Inc. | Bath chair |
USD812389S1 (en) * | 2016-04-19 | 2018-03-13 | Gang Laang Pong | Shower chair |
USD802405S1 (en) | 2016-10-28 | 2017-11-14 | Varidesk, Llc | Leg extender |
US10376129B2 (en) * | 2016-11-08 | 2019-08-13 | Whirlpool Corporation | Dishwasher leveling assembly |
US9854913B1 (en) * | 2017-05-11 | 2018-01-02 | Ann Yang Inc. | Telescopic leg unit for table and chair |
US10369066B2 (en) * | 2017-11-16 | 2019-08-06 | Wanda Spence | Person lifting assembly |
USD898493S1 (en) | 2017-11-29 | 2020-10-13 | Andrew Lentz | Fishing chair |
USD869870S1 (en) * | 2018-06-29 | 2019-12-17 | Ten Square Inc. | Chair |
USD899142S1 (en) | 2019-06-27 | 2020-10-20 | Upper Echelon Products, LLC. | Back cushion |
US11950735B1 (en) | 2021-03-15 | 2024-04-09 | Faith A. Griffin | Shaving assistance platform |
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EP4115769A4 (en) * | 2021-08-24 | 2023-10-25 | Qingdao Centaury Design Co., Ltd. | Connecting structure and seat |
Also Published As
Publication number | Publication date |
---|---|
US6957865B1 (en) | 2005-10-25 |
CA2495930A1 (en) | 2005-10-14 |
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