EP0663503A1 - Door closer - Google Patents
Door closer Download PDFInfo
- Publication number
- EP0663503A1 EP0663503A1 EP94300258A EP94300258A EP0663503A1 EP 0663503 A1 EP0663503 A1 EP 0663503A1 EP 94300258 A EP94300258 A EP 94300258A EP 94300258 A EP94300258 A EP 94300258A EP 0663503 A1 EP0663503 A1 EP 0663503A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- door
- linkage arm
- door closer
- piston rod
- drive lever
- 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.)
- Withdrawn
Links
- 239000012530 fluid Substances 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims 1
- 238000013459 approach Methods 0.000 description 2
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
- E05F3/02—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with pneumatic piston brakes
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
- E05F3/22—Additional arrangements for closers, e.g. for holding the wing in opened or other position
- E05F3/221—Mechanical power-locks, e.g. for holding the wing open or for free-moving zones
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
- E05Y2201/21—Brakes
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
- E05Y2201/252—Type of friction
- E05Y2201/254—Fluid or viscous friction
- E05Y2201/256—Fluid or viscous friction with pistons or vanes
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
- E05Y2201/262—Type of motion, e.g. braking
- E05Y2201/264—Type of motion, e.g. braking linear
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
- E05Y2201/47—Springs
- E05Y2201/478—Gas springs
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
- E05Y2900/13—Type of wing
- E05Y2900/132—Doors
Definitions
- the present invention relates to a door closer. Specifically but not exclusively, it relates to a closure using a pneumatic cylinder in which a door may be latched in its open position (for example when the door is opened more than 90°). It further relates, in the preferred embodiment, to a closer which increases the speed of closure as the door moves towards the closed position.
- a conventional door closer comprises a linkage arm which is either loaded by a spring or attached to a pinion gear assembled to a rack portion of a piston element, so that when the door is closed the pinion gear is rotated by the piston element.
- the closing speed of the door is controlled by rotation of the linkage arm.
- Another type of known closer has a pneumatic, hydraulic or spring-loaded cylinder in which a piston rod is directly connected to the door or the door frame.
- This type of door closer is shown, for example, in US-A-4,190,926 and US-A-4,817,238.
- Such closers do not have the function of latching the door in the fully open position, when the door is opened beyond a predetermined limit. Also, such door closers do not have the function of increasing the closing speed of the door as the closure is completed.
- An object of the present invention is to provide a door closer constructed such that the door may be latched open when it is pushed open beyond a certain angle.
- a further object is for at least the preferred embodiment to increase the closing speed of the door as the door draws near the door frame while the door is being closed.
- a door closer characterised by a housing arranged to be mounted to a door, a first linkage arm extending from the housing, and a second linkage arm one end of which is articulated to the first linkage arm and other end of which is connected to a bracket arranged to be mounted to a door frame; and wherein the door closer further comprises a cylinder within the housing having a piston rod which co-operates with a drive lever.
- the upper end of the aforesaid drive shaft has the drive lever mounted thereto, one end of the first linkage arm being fixedly connected to the drive shaft.
- the drive lever has a concave recess formed at its end, into which the roller of the piston rod can be engaged.
- a piston having a bleed bore is slidably mounted in the pneumatic cylinder, the piston rod is attached to the piston, and a passage having a slightly larger length than that of the piston is formed inside the front end of the cylinder.
- Figure 1 shows that one side of a door 10 is connected by a hinge 12 to a door frame 14, and that the other side of the door has a door handle 18, by the operation of which a latch bolt 16 is brought into operation.
- the door 10 is closed.
- a door closer 20 according to the preferred embodiment of the present invention comprises a housing 22 mounted to the door 10, from which a first linkage arm 24 and a second linkage arm 26 articulated to the first linkage arm 24 extend.
- the end of the second linkage arm 26 is connected to a bracket 28 which is mounted to the door frame 14.
- Figure 1 to Figure 5 illustrate the operation of a door equipped with such a door closer 20.
- FIG 1 illustrates the door in the closed position against the door frame 14 with the door 10 latched to the door frame 14 by the latch bolt 16 which may be opened by the door handle 18.
- the door 10 is opened by turning the handle 18 which retracts the latch bolt 16.
- Figure 2 and Figure 3 respectively show the door 10 opened at angles of 45° and 90° with respect to the door frame 14.
- FIG 4 shows the door 10 opened at an angle of more than 90°. In this position it may be latched by the door closure: details will be described later.
- Figure 5 shows the door 10 drawing near the door frame 14 in the almost completely closed state.
- the door 10 can be completely and securely closed after overcoming the obstacle represented by the edge of the latch bolt 16 since the closing speed of the door is increased by the door closure of the preferred embodiment: details will be explained later.
- Figure 6 and Figure 7 show that the preferred door closure 20 comprises a housing 22 having an extended head portion 30.
- a pneumatic cylinder 34 from which a piston rod 32 extends.
- the end of the piston rod 32 extends into the head portion 30.
- a slidable-mounted piston 38 having a bleed bore 36 which can be closed by means of a washer 35.
- a yoke 40 is mounted and to its shaft 42, a roller 44 is rotatably mounted.
- a U-shaped bracket 46 is mounted in the extended head portion 30.
- a drive shaft 48 is mounted at a position offset from the route of the piston rod 32, and its upper end 50 extends outwardly from the head portion 30; one end of the first linkage arm 24 is fixedly connected to the upper end.
- Fixedly mounted to the middle of the drive shaft 48 is a drive lever 54, its rotation range being restricted by stops 52a, 52b mounted at both sides of the bracket 46.
- the side of the drive lever 54 is contacted by the roller 44 of the piston rod 32, and at its upper end a concave recess 56 is formed.
- a passage 58 is provided which is slightly longer than the piston 38.
- the passage 58 is formed at one side of the cylinder 34, towards the front end.
- the first linkage arm 24 rotates counterclockwise about the central axis of the drive shaft 48 when the door 10 is opened.
- the drive lever 54 is rotated counterclockwise and thus the piston rod 32 abutted by the roller 44 is forced to retract against the pressure of compressed air within the pneumatic cylinder ( Figure 8 and Figure 9).
- the drive lever 54 When the door is to be opened at a predetermined angle of opening, for example, more than 90° (desirably about 100°), it is sometimes desirable to latch the door in this position.
- the drive lever 54 When the door 10 is opened to an angle of more than 90° as shown in Figure 4, the drive lever 54 is rotated from the position shown in Figure 9 to the position shown in Figure 10.
- the roller 44 of the piston rod 32 which abuts the side of the drive lever 54 engages into the concave recess 56 formed at the distal end of the drive lever 54. In this position, movement of the piston rod and of the drive lever is restricted. Accordingly, the door 10 remains latched open so long as an external closing force is not applied to it.
- the door 10 is closed by the power of the pneumatic cylinder when an external closing force is applied.
- a closing force applied to the door causes the roller 44 of the piston rod 32 to be removed from the concave recess 56 of the drive lever 54, and to move down to abut the side of the drive lever 54.
- the piston rod 32 begins to extend by pressure within the pneumatic cylinder 34, thereby rotating the drive lever 54 clockwise. Accordingly, the door 10 is gradually closed while the first linkage arm 24 is rotated clockwise.
- the pneumatic cylinder 34 is slightly modified in the preferred embodiment by the provision of the passage 58 at the inner front end of the cylinder 34.
- This passage is slightly longer than the piston 38.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closing And Opening Devices For Wings, And Checks For Wings (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
A door closer comprises a housing (22) mounted to a door (10), a first linkage arm (24) extending from the housing (22), and a second linkage arm (26) one end of which is articulated to the first linkage arm (24) and other end of which is connected to a bracket (28) of a door frame (14). The first linkage arm (24) is coupled to a drive lever (54) within the housing, this lever being controlled by a piston and cylinder arrangement (32, 34, 38). A recess (56) on the drive lever (54) receives a roller (44) on the end of a piston rod (32), so latching the door in a fully open position.
Description
- The present invention relates to a door closer. Specifically but not exclusively, it relates to a closure using a pneumatic cylinder in which a door may be latched in its open position (for example when the door is opened more than 90°). It further relates, in the preferred embodiment, to a closer which increases the speed of closure as the door moves towards the closed position.
- A conventional door closer comprises a linkage arm which is either loaded by a spring or attached to a pinion gear assembled to a rack portion of a piston element, so that when the door is closed the pinion gear is rotated by the piston element. The closing speed of the door is controlled by rotation of the linkage arm.
- Such a type of door closer is disclosed in US-A-4,285,094, US-A-4,378,612, US-A-4,393,787 and US-A-4,937,914. This type of door closer, however, does not have both the function of being able to latch the door open automatically, when the door is opened beyond a predetermined limit, and the function of completely and securely closing the door toward the door frame by increasing the closing speed as the door approaches the frame.
- Another type of known closer has a pneumatic, hydraulic or spring-loaded cylinder in which a piston rod is directly connected to the door or the door frame. This type of door closer is shown, for example, in US-A-4,190,926 and US-A-4,817,238. Such closers, however, do not have the function of latching the door in the fully open position, when the door is opened beyond a predetermined limit. Also, such door closers do not have the function of increasing the closing speed of the door as the closure is completed.
- An object of the present invention, at least in a preferred embodiment, is to provide a door closer constructed such that the door may be latched open when it is pushed open beyond a certain angle. A further object is for at least the preferred embodiment to increase the closing speed of the door as the door draws near the door frame while the door is being closed.
- According to the present invention there is provided a door closer characterised by a housing arranged to be mounted to a door, a first linkage arm extending from the housing, and a second linkage arm one end of which is articulated to the first linkage arm and other end of which is connected to a bracket arranged to be mounted to a door frame; and wherein the door closer further comprises a cylinder within the housing having a piston rod which co-operates with a drive lever.
- Preferably, the upper end of the aforesaid drive shaft has the drive lever mounted thereto, one end of the first linkage arm being fixedly connected to the drive shaft.
- Preferably, the drive lever has a concave recess formed at its end, into which the roller of the piston rod can be engaged.
- Also preferably, a piston having a bleed bore is slidably mounted in the pneumatic cylinder, the piston rod is attached to the piston, and a passage having a slightly larger length than that of the piston is formed inside the front end of the cylinder.
- The invention may be carried into practice in various ways and one specific embodiment will now be described, by way of example, with reference to the drawings, in which:
- Figure 1 is a schematic plan view illustrating a door closer according to an embodiment of the present invention, with the door in the closed position;
- Figure 2 shows the closer with the door at an angle of about 45°;
- Figure 3 shows the closer with the door at an angle of about 90°;
- Figure 4 shows the closer with the door latched at an angle of more than 90°;
- Figure 5 is a schematic plan view showing how complete closure of the door is achieved by increasing rotation speed when the door draws near the door frame;
- Figure 6 is a sectional view of the door closer with the door in the closed position;
- Figure 7 is a sectional view taken on line VII-VII of Figure 6;
- Figure 8 is a sectional view similar to Figure 6 with the door at an angle of about 45°;
- Figure 9 is a sectional view similar to Figure 6 with the door at an angle of about 90°;
- Figure 10 is a sectional view similar to Figure 6 with the door latched at an angle of more than 90°; and
- Figure 11 is a sectional view similar to Figure 6 showing the increasing rotation speed of the door as the door draws near the door frame.
- The present invention in its preferred embodiment will be explained in more detail with reference to the accompanying drawings. Figure 1 shows that one side of a
door 10 is connected by ahinge 12 to adoor frame 14, and that the other side of the door has adoor handle 18, by the operation of which alatch bolt 16 is brought into operation. In Figure 1, thedoor 10 is closed. - A door closer 20 according to the preferred embodiment of the present invention comprises a
housing 22 mounted to thedoor 10, from which afirst linkage arm 24 and asecond linkage arm 26 articulated to thefirst linkage arm 24 extend. The end of thesecond linkage arm 26 is connected to abracket 28 which is mounted to thedoor frame 14. Figure 1 to Figure 5 illustrate the operation of a door equipped with such a door closer 20. - Figure 1 illustrates the door in the closed position against the
door frame 14 with thedoor 10 latched to thedoor frame 14 by thelatch bolt 16 which may be opened by thedoor handle 18. - The
door 10 is opened by turning thehandle 18 which retracts thelatch bolt 16. - Figure 2 and Figure 3 respectively show the
door 10 opened at angles of 45° and 90° with respect to thedoor frame 14. - Figure 4 shows the
door 10 opened at an angle of more than 90°. In this position it may be latched by the door closure: details will be described later. - Figure 5 shows the
door 10 drawing near thedoor frame 14 in the almost completely closed state. Thedoor 10 can be completely and securely closed after overcoming the obstacle represented by the edge of thelatch bolt 16 since the closing speed of the door is increased by the door closure of the preferred embodiment: details will be explained later. - Figure 6 and Figure 7 show that the preferred
door closure 20 comprises ahousing 22 having an extendedhead portion 30. Mounted within the housing is apneumatic cylinder 34 from which apiston rod 32 extends. The end of thepiston rod 32 extends into thehead portion 30. In thepneumatic cylinder 34 there is a slidable-mountedpiston 38 having ableed bore 36 which can be closed by means of awasher 35. At the end of thepiston rod 32, ayoke 40 is mounted and to itsshaft 42, aroller 44 is rotatably mounted. - In the extended
head portion 30, aU-shaped bracket 46 is mounted. Adrive shaft 48 is mounted at a position offset from the route of thepiston rod 32, and itsupper end 50 extends outwardly from thehead portion 30; one end of thefirst linkage arm 24 is fixedly connected to the upper end. Fixedly mounted to the middle of thedrive shaft 48 is adrive lever 54, its rotation range being restricted bystops bracket 46. The side of thedrive lever 54 is contacted by theroller 44 of thepiston rod 32, and at its upper end aconcave recess 56 is formed. - In the
pneumatic cylinder 34, apassage 58 is provided which is slightly longer than thepiston 38. Thepassage 58 is formed at one side of thecylinder 34, towards the front end. - Operation of the door closer of the preferred embodiment will now be explained.
- As shown in Figure 1, when the
door 10 is closed against thedoor frame 14, thepiston rod 32 of thepneumatic cylinder 34 is extended and in this position theroller 44 presses against the drive lever 54 (Figure 6). - As shown in Figure 2 and Figure 3, the
first linkage arm 24 rotates counterclockwise about the central axis of thedrive shaft 48 when thedoor 10 is opened. By virtue of this rotation of thedrive shaft 48, thedrive lever 54 is rotated counterclockwise and thus thepiston rod 32 abutted by theroller 44 is forced to retract against the pressure of compressed air within the pneumatic cylinder (Figure 8 and Figure 9). - When the door is to be opened at a predetermined angle of opening, for example, more than 90° (desirably about 100°), it is sometimes desirable to latch the door in this position. When the
door 10 is opened to an angle of more than 90° as shown in Figure 4, thedrive lever 54 is rotated from the position shown in Figure 9 to the position shown in Figure 10. Theroller 44 of thepiston rod 32 which abuts the side of thedrive lever 54 engages into theconcave recess 56 formed at the distal end of thedrive lever 54. In this position, movement of the piston rod and of the drive lever is restricted. Accordingly, thedoor 10 remains latched open so long as an external closing force is not applied to it. Thedoor 10 is closed by the power of the pneumatic cylinder when an external closing force is applied. - For example, when the
door 10 is latched open, as shown in Figure 4 and Figure 10, a closing force applied to the door causes theroller 44 of thepiston rod 32 to be removed from theconcave recess 56 of thedrive lever 54, and to move down to abut the side of thedrive lever 54. Thepiston rod 32 begins to extend by pressure within thepneumatic cylinder 34, thereby rotating thedrive lever 54 clockwise. Accordingly, thedoor 10 is gradually closed while thefirst linkage arm 24 is rotated clockwise. - When the
door 10 approaches thedoor frame 14 as shown in Figure 5, it is desirable that closing speed of thedoor 10 be increased. That is because thelatch bolt 16 of the door may act as an obstacle to the door fully closing. - To this end, the
pneumatic cylinder 34 is slightly modified in the preferred embodiment by the provision of thepassage 58 at the inner front end of thecylinder 34. This passage is slightly longer than thepiston 38. When, by extension of thepiston rod 32, thepiston 38 reaches the front end of thepneumatic cylinder 34 adjacent thepassage 58, fluid from in front of thepiston 38 is rapidly moved towards the rear through thepassage 58. This causes the speed of movement of the piston and hence the piston rod to increase. Consequently, thedoor 10 is completely closed toward thedoor frame 14 while thedrive lever 54 is rapidly rotated clockwise at an increased speed.
Claims (8)
- A door closer characterised by a housing (20) arranged to be mounted to a door (10), a first linkage arm (24) extending from the housing, and a second linkage arm (26) one end of which is articulated to the first linkage arm (24) and other end of which is connected to a bracket (28) arranged to be mounted to a door frame; and wherein the door closer further comprises a cylinder (34) within the housing having a piston rod (32) which cooperates with a drive lever (54).
- A door closer as claimed in Claim 1 in which the drive lever (54) is coupled to the first linkage arm (24).
- A door closer as claimed in Claim 2 in which the drive lever is mounted to a drive shaft (48), one end of the first linkage arm (24) being fixedly coupled to the drive shaft.
- A door closer as claimed in any one of the preceding claims in which the drive lever (54) has a concave recess (53) therein, the piston rod (34) being engageable within the recess, so latching the door in an open position.
- A door closer as claimed in any one of the preceding claims in which the piston rod (34) includes a roller (44) at the end thereof.
- A door closer as claimed in Claim 5 when dependent upon Claim 4 in which the roller (44) is engageable within the recess (56).
- A door closer as claimed in any one of the preceding claims in which the piston rod (34) is secured to a piston (38) within the cylinder (34), the piston having a bleed bore (36) therein.
- A door closer as claimed in Claim 7 in which the cylinder (34) provides a bypass fluid channel (58) towards its forward end.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94300258A EP0663503A1 (en) | 1994-01-14 | 1994-01-14 | Door closer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94300258A EP0663503A1 (en) | 1994-01-14 | 1994-01-14 | Door closer |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0663503A1 true EP0663503A1 (en) | 1995-07-19 |
Family
ID=8217529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94300258A Withdrawn EP0663503A1 (en) | 1994-01-14 | 1994-01-14 | Door closer |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0663503A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004026356A1 (en) * | 2004-05-26 | 2005-12-29 | Stabilus Gmbh | tension spring |
US7444713B2 (en) * | 2005-11-30 | 2008-11-04 | Dorma Gmbh + Co. Kg | Closer arm assembly for an automatic door closer |
CN104912419A (en) * | 2015-06-11 | 2015-09-16 | 希美克(广州)实业有限公司 | Speed-adjustable door closer |
IT201600081638A1 (en) * | 2016-08-03 | 2018-02-03 | Mypro Res S R L | DAMPING DEVICE. |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2303934A1 (en) * | 1972-01-26 | 1973-08-02 | Stanley Works | DOOR LOCKOUT WITH CONTROLLED RELEASE OF THE CLOSING MOVEMENT |
DE2313513A1 (en) * | 1970-09-10 | 1974-10-03 | Eaton Gmbh | DOOR CLOSER |
GB1512016A (en) * | 1975-05-23 | 1978-05-24 | Barber C | Release mechanisms for use with automatic door closers |
EP0409445A1 (en) * | 1989-07-21 | 1991-01-23 | Ryobi Ltd. | Door closer |
-
1994
- 1994-01-14 EP EP94300258A patent/EP0663503A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2313513A1 (en) * | 1970-09-10 | 1974-10-03 | Eaton Gmbh | DOOR CLOSER |
DE2303934A1 (en) * | 1972-01-26 | 1973-08-02 | Stanley Works | DOOR LOCKOUT WITH CONTROLLED RELEASE OF THE CLOSING MOVEMENT |
GB1512016A (en) * | 1975-05-23 | 1978-05-24 | Barber C | Release mechanisms for use with automatic door closers |
EP0409445A1 (en) * | 1989-07-21 | 1991-01-23 | Ryobi Ltd. | Door closer |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004026356A1 (en) * | 2004-05-26 | 2005-12-29 | Stabilus Gmbh | tension spring |
DE102004026356B4 (en) * | 2004-05-26 | 2008-07-31 | Stabilus Gmbh | tension spring |
US7444713B2 (en) * | 2005-11-30 | 2008-11-04 | Dorma Gmbh + Co. Kg | Closer arm assembly for an automatic door closer |
US7721386B2 (en) | 2005-11-30 | 2010-05-25 | Dorma Gmbh + Co. Kg | Closer arm assembly for an automatic door closer |
CN104912419A (en) * | 2015-06-11 | 2015-09-16 | 希美克(广州)实业有限公司 | Speed-adjustable door closer |
IT201600081638A1 (en) * | 2016-08-03 | 2018-02-03 | Mypro Res S R L | DAMPING DEVICE. |
WO2018025105A1 (en) * | 2016-08-03 | 2018-02-08 | Mypro Research S.R.L. | Damping device |
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