US2696632A - Door closer and stopper - Google Patents

Description

Dec. 14, 1954 \ANTRANIG DER SARKISSIAN 2,696,632

DOOR CLOSERAND STOPPER INVENTOR BY 20% ATTORNEY Filed NOV. 25, 1953 United States Patent 2,696,632 noon CLOSER AND STOPPER Antranig Der Sa'rkissian, Beirut," Lebanon Application November 25, 1953,'Serial No. 394,433

2 Claims. (CI. 1652) The present invention relates to: a 'door closer and stopper and vhas for 'an':object.to provide a device of this kind which is adaptedfor 'use'on both hinged'doors and sliding doors.

Another object of the present invention is to provide a dev1ceof this character capable of application to all kindsxof swinging doors from :the lightest-screen doors to heavy and wide doors, such as are found: in institntions, public buildings andindustrial plants.

A further object of the present invention is' to 'provide a door closer andstopper which can be:installed on either right-hand or left-handl hinged doors without changing the assembly of parts.

:The present invention aims to provide adevice of this type which is easy toinstall and .in which the only maintenance required is the addition-of a'small amount of grease at long intervals.

The present invention also aims to provide a structure which has been developed with a view to simplicity, ei'liciency, durability, good appearance and. low manufacturing cost as the larger parts can be made from tubing, rods, and the like, of standard or regular stock.

With the foregoing and other objects in view, the invention will be hereinafter more fully described and more particularlypointed out in the appended claims.

In the drawing in which the same parts are denoted by the same reference numerals throughout'theseveral views,

Figure l is a fragmentary horizontal sectional View of a door and a door casing having ap'pliedthereto a device constructed in accordance with thepresent invention,

Figure .2 is a front elevational View oftheimproved device,

Figure 3 is a sectional view'taken on the line 3-3 of Figure 2,

Figure 4 is an enlargedfragmentary sectional view of therocking squeezer and associated parts,

I Figure 5 is a sectional view takenon the line- 5 5 of Figure 4,

Figure 6 is a view similar to Figure 4 with the squeezer in its open position, and

Figure 7 is a fragmentary sectional view of the rocking squeezer and associated parts showing a modified form of the invention.

Referring more particularly to the drawing, 10 indicates one upright of a door frame on which a door 11 is pivotally mounted by hinges 12 only one of which is shown. The improved door closer and stopper is generally indicated at A and comprises two telescopic members 13 and 14 which may be in the form of tubes. The member 13 is of larger diameter than the member 14 and its inner end is open to telescopically receive the inner open ended portion of the member 14. The outer end of the member 13 is closed by a solid end portion 15 which is provided with a transversely extending through bore 16.

The member 13 may be pivotally mounted on the upright 10 by a bracket 17 which may be substantially U- shaped in cross section and have a pair of spaced apart parallel legs 18 and a connecting portion 19. The bracket 17 may be attached to the upright 10 by screws or other suitable fastening elements which extend through suitable openings in the portion 19 of the bracket and into the upright 10. The closed end portion 15 of the member 13 is received between the legs 18 of the bracket with the bore thereof in alignment with suitable aligned holes in the legs 18. Apintle21- is inserted through the aligned holes in the legs and the bore. A substantially circular boss '22 is secured or formed integral with the inner face of the closedend portion 15 and the "innerface ofthe adjacent wall of the tube 13. The boss 22 has a reduced inner end portion 23 which forms an annular seat v24 for the outer end of: a coil spring 25. The inner end of the coil spring-'25 a'buts aganist the outer end of a guide member 26, the main body portion of which is substantially circular and has a sliding fit on the inner face of the wall of the-tube1 3. The member 26' has an inner end portion-27 of reduced diameter which is 'exteriorly screwthreaded 'as -at 28 to receive the interiorlv screw threaded inner end portion 29 of the tube 14. The reduced portion 27 .of the member. 26' forms air-annular shoulder 30 upon -Which: seats the inner edge of the tube 14. Outwardly of the outermost screw thread on the tube 14 there is'formed; on the inner face ofthe wall of thevtube 14 a circular recess 31 which receives the flange 32 of a truncated cone shaped packing member 33 so that when thetube 141's screwed home on the member 26 the flange 32 will be frictionallyheld in the recess 31 by the free end of the, portion .27. I v I The packing member -33 and the guide member 26 have aligned through passages 34 and '35 through which extends a rod 36,' the outer endof which is screw threaded as at 37 {and isreceived 'by a screw threaded bore 38 formed inathe boss 22. CTh'e inner endportion of therod '36-.is flattenedasat 39 and its extreme inner end part. is received by a socket 40 formed in a rocking squeezer or valve member 41 which is pivotally mounted on the flattened end of the' rod 36 by a pivot pin 42 extending through suitable aligned holesin the squeezer 41 and the rod.36. The bottom 43* of the socket 4t) and the end 44 -of the rod 36 are cooperatingly curved to permit free rocking movement of the squeezer 41' with. respect to the rod'36. The rocking squeezer '41 is substantially hemispherical and its inner face 41a is substantially dome-shaped and its outer face 41b is flat. The inner and outer faces of the squeezer are joined by an annular portion 41c which is arcuate in cross-section and is spaced from'the inner face of the wall of the tube 14.

The outer end of the tubularmember14 is closed by a solid end portion 45 which is provided withfa transversely extending through'bore 46. The member 14 may be? pivotally mounted on the door "11 by a 'brack'etj47 which may be similar to the bracket 17. V The bracket 47 has apair of 'spacedapart parallel legs "481a'ndfaf connecting portion 49. The bracket 47 may be attachedto the door 11 by serews-fsopr' other suitable fastefningelements which 'ext'e'nd'through appropriate openings in the portion 49 of the bracket47 and into thedoor. The closed'eridzpor tion '45 of the memb'er14j 1s rece1ved'he tween thelegs48of the brack'e't 47'w1th the bore'46 thereof in alignment with suitable aligned holes in the legs 48. A pintle 51 extends through the aligned holes in the legs and the bore.

The tube 14 has a screw threaded filling opening 52 for the introduction of grease into the chamber 53. The opening 52 may be closed by a removable screw threaded plug 54.

In order to prevent inward telescoping of the tubes 13 and 14 and consequently the opening of the door, the tube 13 has formed in its wall diametrically aligned holes 55 for receiving a stop pin 56 held captive by a chain 57, one end of which is secured to the tube 13 by a staple 58, or the like, adjacent the inner end of the tube 13 and the opposite end of the chain is attached to the pin 56. The holes 55 are disposed adjacent to the outer end of the guide member 26 when the door 11 and the member are in their fully door closed position so that, when the pin 56 is positioned in the holes 55, the pin will be disposed between the two innermost convolutions of the spring 25 so as to arrest any movement of the member 26 and the tube 13 in its door opening direction.

The door may be held open at any desired angle or to any extent by a holding chain 59, one end of which is secured to the staple 58. The links of the chain 59 may be selectively engaged over the head 60 of the pintle 51 to hold the door in the desired open position. Such an arrangement will not interfere with the further opening of the door, but will permit the door to return only to its selected partially open position. The links of the chain 59 will have frictional engagement with the head 60 of the pintle 51 to prevent accidental escape of the selected link from the head 60, but to permit intentional removal therefrom by the hand of the user.

In the use of the device, the chamber 53 will be filled to capacity with a fairly heavy grease, for example, one having the weight of the conventional grease used in door checks of this type.

When the door begins to open, the distance between the pintles 21 and 51 will decrease, the spring 25 will be compressed and the squeezer 41 will rock on its pivot 42 in a clockwise direction to the position shown in Figure 6 of the drawing. In this position the squeezer will offer little resistance to the passage of the grease in the chamber 53 therearound and the dome-shaped contour of its inner face 41a and the arcuate portion 410 will further minimize the resistance of the squeezer to the passage of the grease therearound as the tube 14 telescopes into the tube 13 during the opening movement of the door. The grease which passes around the member 41 will be trapped by the packing member 33. The rocking of the squeezer is made possible by the fact that, while the squeezer is in a vertical position, there are two forces acting upon it. One force, that is, compression, acts on surface 41b and another force, that is, a suction force, acts on surface 41a creating a vacuum. The squeezer automatically rocks back, with the help of the rod 36 that pushes it back into tube 14, while the door is being opened. The compressed grease escapes around the edge of the squeezer gradually thus controlling the expansion of the spring 25.

As soon as the user releases the pressure on the door, the spring 25 will begin to expand and move the member 26 to the right looking at Figure 3 of the drawing and the squeezer 41 will rock back to its vertical position shown in Figures 3 and 4 of the drawing. In this position of the squeezer, in cooperation with the packing member 33 it will act as a dashpot and retard the closing movement of the door under the influence of the spring 25 and prevent slamming of the door. The flat face 41b will enhance the effectiveness of the squeezer in its capacity of a damper.

The packing member 33 prevents the leakage of grease from the chamber 53 along the rod 36 and between the tube 14 and the portion 27 of the member 26. The member 26 serves as a guide for keeping the telescopic members 13 and 14 in alignment, as a support and guide for the rod 36 and as an abutment for one end of the spring 25.

In the form of the invention illustrated in Figure 7 of the drawing, a needle-like rod 33a is firmly embedded in the packing 33 and extends from the packing 33 towards the squeezer 41 a suflicient distance so that the free end of the rod will contact the outer face of the squeezer when the parts have almost reached the end of their self closing movements, that is when the door is about to latch. At this {time the squeezer 41 will be rocked by the rod 33a to its fully open position and at this point the compression of the grease is released thereby releasing the drag so as to provide enough force for latching the door.

It is obvious that various changes and modifications may be made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims.

Whatl claim is:

1. A door closer and stopper comprising two telescoping members one of which is adapted to be movably connected to a door and the other of which is adapted to be movably connected to the door frame, means on said members for permitting free opening of the door and for retarding the closing movement of the door to prevent slamming thereof comprising a grease chamber in said one telescoping member, a rod fixed to said other telescoping member, a valve member on said rod and disposed in said grease chamber, grease entrapping means within said grease chamber and cooperating with said valve member to provide a dashpot and resilient means in said other telescoping member for urging said grease entrapping means towards said valve member for moving the entrapped grease past said valve member in a dashpot action during the closing movement of the door to prevent slamming of the door, said valve member being substantially hemispherical and having a fiat face, a dome-shaped face and an annular portion joining said flat face and said dome-shaped face, said annular portion being arcuate in cross-section and spaced from the wall of said grease chamber, a guide member having a sliding fit with said other telescoping member and connected to said one telescoping member, and a packing member carried by said guide member and said one telescoping member, said rod extending through said guide member and said packing member and serving as a guide and support therefor.

2. A door closer and stopper as claimed in claim 1 wherein a rod is carried by said packing member and extends therefrom towards said valve member for engaging said valve member, and moving it to its fully open position immediately before the end of the door closing movement of the parts to release the compression of the grease and to cause the door to latch.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,131,264 Pearson Mar. 9, 1915 1,149,790 Sherwood Aug. 10, 1915 2,128,030 Koleno Aug. 23, 1938 2,227,656 Lindsay Jan. 7, 194].

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