US2237841A - Valve for door checks and closers - Google Patents

Description

April 8, 1941. 5 05 NEWELL 2 231841 VALVE FUR EOBR CHECKS AND CLOSERS Filed May 18, 194.0

Patented Apr. 8, 1941 UNITED STATES PATENT OFFICE 4 Claims.

This invention relates to the class of door checks and closers and pertains particularly to improvements in certain detailed features of a door check such as an air bleeding valve and mounting for the piston unit thereof.

One of the principal objects of the present invention is to provide a novel bleed valve designed primarily for use in connection with an air cushioned door check by means of which valve the escape of air from the check during the closing of a door to which the check is attached, may be readily controlled so as to permit such door to close slowly or rapidly as may be desired.

Another object of the invention is to provide in a spring actuated door check, a novel mounting for a piston upon a piston stem and an end of a spring encircling the same stem whereby the force of such spring may be conveyed to the piston through the stem without imposing strain upon the piston unit itself with the possible result of loosening the piston on the carrying stem.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming part of this specification, with the understanding, however, that the invention is not to be confined to any strict conformity with the showing of the drawing but may be changed or modified so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the appended claims.

In the drawing:

Fig. 1 is a view illustrating in top plan a door check constructed in accordance with the present invention and showing the same applied to a door which is in fully opened position.

Fig. 2 is a sectional view on the line 2-2 of Fig. 1.

Fig. 3 is a transverse section on the line 3--3 of Fig. 2.

Fi 4 is a sectional view on the line 4-4 of Fig. 1.

Referring now more particularly to the drawing, the numeral I designates a wall at one side of a door opening, one side of the jamb for such opening being indicated at 2. The numeral 3 designates a door which is hingedly joined to an edge of the jamb, as indicated at 4, and this door is here shown as having been swung through an arc of approximately 180 to fully opened position.

I my co-pending application, Ser. No. 290,697, I have illustrated a door check and closure of In one end of the cylinder 5 is secured a head I through which extends a piston stem 8 upon the inner end of which carried a piston which is indicated as a Whole by the numeral 9. Between the piston 9 and the head I, an expansion spring It is disposed which is compressed when the door is opened and the piston has been shifted to the rear end of the cylinder or that end in which the head 1 is secured.

To the inner face of the jamb 2 there is secured a bracket II by means of a pair or more of screws l2. This bracket carries a vertical pivot pin I3. The pin I3 is vertically arranged and passes through an end of a link l4 which is preferably formed of fiat material and is of longitudinally arcnate form, as indicated at l5, through the major portion of its length and merges at the end which is attached to the pin I3 into the short straight portion 16. The concave side of the portion l5 of the link is directed toward the door 3 and toward the face of the door to which the cylinder 5 is secured, when the door is in closed position. The free end of the arcuate portion l5 of the link has the outer end of the piston stem 8 pivotally connected thereto. By reason of the novel formation of thelink I4, the door is permitted to swing through approximately of movement from opened to closed position or vice versa, and when the door is in fully opened position, the short inner end of the link will be in engagement with a head of a bracket securing screw l2, as shown in Fig. 1.

The end of the cylinder 5 remote from the head 1 is closed by a wall in the form of a disk ll. This wall has a central flat portion l8 through the center of which an aperture I9 is formed. The wall H, which is formed of relatively light metal, has the flat portion l8 thereof provided with the several radial outpressed ribs 20, each of which provides upon the inner side of the wall a radial channel 2| which at its inner end runs into the central aperture I9. Thus these outpressed portions provide upon the inner side of the wall radial channels communicating with the aperture 19 and upon the outer side of the wall raised ribs for maintaining in spaced relation with the outer central fiat portion [8 of the wall, a nut 22.

The nut 22 is threaded upon the outer end of a stem 23 which extends through the aperture l9 and which at its inner end carries a washer head 24. Interposed between the washer head 24 and the inner side of the fiat portion I8 of the wall is a collar 25 which surrounds the stem and which is made of relatively soft rubber. This collar rests against the inner surface of the fiat portion I8 and covers the major portion of each of the channels 2!. The outer end of the stem 23 is enlarged slightly, as indicated at 26, to prevent the nut from being completely removed therefrom.

When the collar 25 is uncompressed or is in its normal form, it merely covers the channels 2| and does not interfere'with the free passage of air along these channels and through the aperture Iii around the threaded stem 23. However, if the nut 22 is threaded up on the stem so as to draw the head toward the wall, the collar 25 will be compressed and being of soft rubber, it will be forced into the channels 2i where it lies over the same and will thus obstruct the passage of air therethrough. Naturally the degree of compression of the collar and the extent to which it is forced into the channels can be readily controlled so that the channels may be completely filled with the rubber and thus prevented from conveying any air or they may only be partly filled so that air can fiow slowly therethrough either into or out of the cylinder.

The piston 9 is, as previously stated, mounted upon the stem 8. The piston comprises a metal cup 21 disposed within a flexible cup of leather or similar material 28. The end of the stem extends through the centers of these two cups and is swaged over, as indicated at N, while upon the inner side of the leather cup, a washer 36 is located through the center of which the stem passes and this washer is held firmly in place against the leather cup by the portion 3! of the stem which is upset, as illustrated. Thus the cups and the washer 36 are firmly secured between the swaged end 29 of the stern and the upset portion 3 l.

Upon the inner side of the upset portion there is located upon the stem the washer 32 and. against this washer the inner end of the spring It bears, as illustrated in Fig. 4. By this construction, it will be readily seen that the spring is provided with a firm seat against which to bear to force the piston forwardly in the cylinder, but the force of the spring is carried by the portion 3| instead of by the piston 9 as is the usual manner of arranging these parts and, therefore, the piston will not be caused to work loose on the stem through the constant pressure of the spring thereagainst. This is a condition which at the present time develops in various implements of this type where an end of a compression spring is permitted to bear against a piston.

In view of the foregoing, it will be readily apparent that there is disclosed a simple but novel bleed valve construction for use in inexpensively produced door checks and closers of the type stated and also that the means disclosed for connecting the operating spring with the piston is novel and of simple form whereby it can be readily constructed so as to make it possible to employ such construction in inexpensive structures of the character stated.

What is claimed is:

1. In a device of the character stated, a bleed valve, comprising a fiat body having an aperture therethrough and having a channel formed therein and leading into the aperture, a deformable body disposed upon one side of the first body and overlying said channel, and means connected with the deformable body and extending through the aperture facilitating the compression of the deformable body into the channel for the control of the passage of air through the channel and aperture.

2. A bleed valve of the character stated, comprising a fiat body having an aperture therethrough, said body being pressed to provide a rib and a channel extending radially from the aperture, the channel opening into the aperture, a stem extending through the aperture, a deformable collar encircling the stem and covering the major portion of said channel, means connecting an end of the stem with the end of the collar remote from the wall, and a nut threaded upon the other end of the stem upon the opposite side of the wall from the collar and resting upon said rib, the nut when threaded up on the stem compressing the collar into the channel.

3. A bleed valve construction, comprising a fiat body having an aperture and having a channel formed therein and opening at one end into the aperture, a body of soft rubber disposed upon the side of the fiat body in which the channel is formed and overlying the channel and the aperture, and means for compressing the rubber body to effect the flowing of a portion thereof into the channel and the control of the flow of air through the channel to the aperture.

4. A bleed valve construction, comprising a relatively thin plate having an aperture therethrough, the plate being pressed to form a plurality of channels extending radially from the aperture, the channels upon one side of the plate forming ribs extending radially of the aperture, a threaded stem extending through the aperture and carrying a washer upon the end thereof nearest the channels, a collar of soft rubber encircling the stem and interposed between the Washer and the side of the plate in which the channels are formed, said collar covering the major portion of the channels, and a nut threaded upon the other end of the stem and bearing upon said ribs and functioning when threaded up on the stem to compress the rubber collar into the channels.

FRANK MCGEE NEVVELL.

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