Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3763519 A
Publication typeGrant
Publication dateOct 9, 1973
Filing dateMay 19, 1971
Priority dateJan 8, 1971
Also published asDE2103536A1
Publication numberUS 3763519 A, US 3763519A, US-A-3763519, US3763519 A, US3763519A
InventorsL Favre
Original AssigneeL Favre
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Door spring
US 3763519 A
Abstract
A device adapted to return a door to its closing position after it has been opened.
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

I United States Patent 11 1 1111 3,763,519 Favre Get. 9, 1973 [54] DOOR SPRING 2,694,389 11/1954 Turkish 74/569 O 1 Invent Lucien Gland, Swnzehand 531;??? 311320 52121 .Iffik [22] Filed: May 1971 FOREIGN PATENTS OR APPLICATIONS [21] App]. N0; 144,842 777,449 2/1968 Canada 16/190 1,263,866 4/1902 France 74/569 [30] Foreign Apphc atlou Pnonty Data Primary ExaminerBernard A. Gelak Jan. 8, 1971 Switzerland 299/71 Assistant Examiner peter A Aschenbrenner Att -R d A. R b [52] us. c1 16/72, 16/190, 16/145, 9

16/129 51 1111.0 E051 H08 [57] ABSTRACT [58] Field of Search 16/72, 80, 145, 85, A device adapted to return a door to its closing posi- 16/129, 180, 190, 181, 182, 86 A; 74/569 .tion after it has been opened.

The device comprises a cam adapted to be fixed on [56] References C'ted the door and a casing adapted to be fixed on the frame UNITED STATES PATENTS of the door, the casing comprises a spring exerting 21 1,645,977 10/1927 Titus 16/80 x force on a roller which is held in Contact with the 753,998 3/1904 Moore 16/72 curve of the cam and means adapted to control the 328,192 10/1885 Coultaus 16/71 force of the roller on the cam, the cam and the casing 2,219,820 l0/ 9 SChOniIZerm 16/35 X being provided with means to adjustably mount them 967,289 8/1910 Adam 16/72 on the door d the f 1,987,512 l/l935 Leonard 16/180X 2,580,152 12/1951 Bergstrom et a1. 74/569 3 Claims, 2 Drawing Figures noon SPRING FIELD OF THE INVENTION The present invention relates to a door closure.

DESCRIPTION OF THE PRIOR ART Devices are known that bring a door back to its closed position after the latter having been opened. These devices are spring actuated and are provided with a brake system to prevent a sudden release of the spring. Such a brake system which usually uses the compression of a liquid or air requires a very precise setting. In order to obtain such a setting, complicated means must be foreseen. For this reason, the cost of these devices is rather high. Furthermore, the operation of these devices may sometimes fail when the temperatures vary considerably and in particular when these temperatures are very low. Another disadvantage of these devices consists in the fact that a light pressure on the door may cause it to open.

SUMMARY OF THE INVENTION An object of the present invention is toovercome the above-mentioned disadvantages. I

More specifically, the invention is a door closure for closing an opening formed by a frame part and a door part swingingly connected to the frame part, this closure comprising: a cam fixed to one of the parts and having a camming edge; a follower fixed to the other part and including a follower roller and resilient means biasing the roller against the camming edge for constant application thereagainst. The aforementioned camming edge is' formed, in succession, of a straight portion that extends at right angle to the said one part, a curved portion that extends in a direction away from the follower and a stop notch adapted-to receive the follower roller to hold the door part in open position.

BRIEF DESCRIPTION OF THE DRAWING A drawing is annexed to illustrate an embodiment of the invention, wherein FIG. 1 is a top plan view of the door closure when the door is slightly open;

FIG. 2 is a front view of the door spring mounted at the top of the door.

DESCRIPTION OF THE PREFERRED EMBODIMENT The door closure shown in-the drawing comprises a cam provided with a curved surface 11. The cam 10 is fixed by means of a metallic strip 12 in a corner located at the top of the frame 13 of the door. This strip 12 is provided with elongated slot '14 through which screws are inserted to fasten the strip to the frame 13 of the door. On account ,of the'elong ated slot 14 provided in the metallic strip 12, the cam 10 may take a desired orientation relative to the frame 13 of the door and then rigidly fixed by means of the screws 15 on the said frame. The leaf 16 which is swingingly mounted in the frame of the door by some known means, is provided with a strip 17 in which is fixed a support 18 provided with means which cooperate with the cam 10. The support 18 is provided with slots 19 through which the screws 20 pass to rigidly secure the strip 17. The elongation of the slots 19 enables the support 18 to take a variety of orientations over the strips 17 carried by the leaf l6.

The support 18 carries follower assembly formed of a casing 21 in which is located a roller holder 22 and a roller 23 extending outside the casing 21. The roller holder 22 is under the action of a force exerted by a spring 24 located inside the casing 21. The end of the casing 21 opposite the roller 23 is provided with a threaded hole through which is mounted a setting screw 25. The screw 25 is adapted to exert a pressure on a small plate 26 which is in contact with the spring 24. When the setting screw 25 is rotated, the force exerted by the spring may be controlled.

The roller 23 is located in such a way as to come in contact with the curved surface 11 of the cam 10. The pressure at which the roller 23 is applied against the curved surface 11 of the cam 10 may be varied and adjusted by means of the setting screw 25.

The curved surface 11 is provided at the end of the path of the roller 23, with a notch 27 in which the roller 23 can be lodged. In this position, the leaf remains open and the door does not close by itself by means of the door closure.

The operation of the door closure, as described above, is as follows:

When the leaf 16 is open, the roller 23 moves from a straight surface a of the camming surface 11 to a surface b curving in the direction of opening of the door. The roller is pushed inwardly of the housing 21 by the cam 10 and against the pressure exerted by the spring 24. As soon as the pressure exerted on the leaf stops, the latter is brought back to its closing position by means of the door spring. For this purpose, the spring applies a pressure against the roller holder 22 and this pressure is transmitted by means of the roller 23 on the camming surface 11 of the cam 10. The closing of the leaf 16 takes place in such a way that as long as the roller 23 rides on the curved surface b, the door closes relatively slowly. But as soon as it comes in contact with the straight surface a, extending substantially at right angle to the door frame 13, the door closes rather abruptly ensuring complete closure thereof. Once the door is closed, it will not open by itself.

The pressure which is necessary to open the door may be controlled by means of the setting screw 25. The position of the cam 10 which is also adjustable, also influences the pressure with which the leaf 16 is applied against the frame 13. As stated above, the various parts of the door closure may be fixed to the frame 13 of the door and to the leaf 16 in such a way that they may be moved and adjusted as well as solidly fixed in a desired position.

Every part of the door closure which constitute the above-described embodiment are simple to manufacture. This lowers its cost as compared to the known devices.

An alternative embodiment of the above-described invention would consist in that the cam with its camming surface 11 be fixed to the leaf 16. The support 18 as well as the parts cooperating with the cam 10 would then be fixed to the frame 13 of the door.

I claim:

1. A door closure for closing an opening formed by a frame part and a door part swingingly connected to said frame part, said closure comprising:

a. a cam fixed to one of said parts and having a camming edge;

b. a follower fixed to the other part and including a follower roller and resilient means biassing said roller against said camming edge for constant application thereagainst, and

c. wherein said camming edge is formed, in succession, of a straight portion extending at right angle to said one of such part, a curved portion extending in a direction away from said follower and a stop notch adapted to receive said follower roller to hold said door part in open position,

whereby, when said door part moves from open to closed position, said biassed roller first rides on said curved portion to force said door to close relatively slowly and then rides on said straight portion to allow said door part to move abruptly towards said frame part to ensure complete closure.

2. A door closure as claimed in claim 1 wherein said cam is fixed to said frame part and means so fixing it as to allow displacement of said camming surface with respect to said follower roller.

3. A door closure as claimed in claim 2 wherein said follower is fixed to said door part and comprises a casing, a roller holder rod slidably received in said casing to which said follower roller is mounted and a spring in said casing biassing said rod and roller outwardly against said camming edge, and means fixing said casing to said door part adjustably in longitudinal direction whereby said casing may be displaced longitudinally to vary the biassing pressure acting on said roller.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US328192 *Oct 13, 1885 of bbooklyn
US753998 *Sep 18, 1903Mar 8, 1904John Crawford MooreDoor-spring.
US967289 *Dec 1, 1909Aug 16, 1910Roman Edward AdamSelf-closing device for doors.
US1645977 *Oct 20, 1925Oct 18, 1927Titus Alfred EDoor hinge
US1987512 *Apr 5, 1932Jan 8, 1935Jamison Cold Storage Door CompHinge for doors
US2219820 *Feb 5, 1940Oct 29, 1940Rudolph I SchonitzerDoor opening means
US2513751 *Dec 4, 1947Jul 4, 1950Gen Motors CorpDoor check and hold-open
US2517966 *Jan 15, 1948Aug 8, 1950Boye James H Mfg CoScreen door check and silencer
US2580152 *Aug 25, 1950Dec 25, 1951Crompton & Knowles Loom WorksPicking shoe for looms
US2694389 *Oct 14, 1952Nov 16, 1954Eaton Mfg CoValve gear length adjusting mechanism
CA777449A *Feb 6, 1968M. Himes JohnCabinet hinge
FR1263866A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3947918 *Feb 25, 1975Apr 6, 1976Lucien Henri FavreDoor closer
US4692964 *Mar 5, 1986Sep 15, 1987Amerock CorporationConcealed self-closing hinge
US4773125 *Oct 7, 1987Sep 27, 1988Takaharu WatabeDoor closer
US7275284 *May 4, 2002Oct 2, 2007Mepla-Werke Lautenschlager Gmbh & Co. KgDamping device
US7562416Oct 4, 2006Jul 21, 2009Lautenschlaeger Gerhard WilhelmDamping device with a joint hinge
US7712185 *Oct 3, 2008May 11, 2010Samsung Precision Industrial Co., Ltd.Door hinge device for absorbing the closing impact of furniture door
US7865999Feb 2, 2007Jan 11, 2011Yale Security Inc.Door motion controller assembly
US7900321 *Apr 20, 2007Mar 8, 2011Julius Blum GmbhDamper arrangement
US8671521 *May 5, 2011Mar 18, 2014Robert F. IrwinControl motion hinge with torsion spring
US20040205935 *May 4, 2002Oct 21, 2004Lautenschlaeger Gerhard WilhelmDamping device
US20070062366 *Oct 4, 2006Mar 22, 2007Mepla-Werke Lautenschlager Gmbh & Co. KgDamping device
US20070220705 *Apr 20, 2007Sep 27, 2007Helmut FitzDamper arrangement
US20080184627 *Feb 2, 2007Aug 7, 2008Hilger Timothy JDoor motion controller assembly
US20090165244 *Oct 3, 2008Jul 2, 2009Samsung Precision Industrial Co., Ltd.Door hinge device for absorbing the closing impact of furniture door
US20110271485 *May 5, 2011Nov 10, 2011Irwin Robert FControl motion hinge with torsion spring
US20150176319 *Dec 20, 2013Jun 25, 2015Shen-Fu HuangCam-type oil-free automatic door closer
US20160376823 *Sep 9, 2016Dec 29, 2016Julius Blum GmbhActuating drive for furniture flaps
Classifications
U.S. Classification16/72
International ClassificationE05F1/10, E05D11/10
Cooperative ClassificationE05Y2201/702, E05F1/105, E05Y2900/132, E05Y2600/20, E05D11/1064
European ClassificationE05F1/10D2