US2310902A - Check valve for door closers - Google Patents

Description

Fens, 1943. y' "u, VQELKEL 2,310,902

CHECK VALVE FOR DOOR CLOSERS Filed May 13, 1940 ORNEY.

Patented Feb. 9, 1943 CHECK VALVE FOR DOOR YCLOSERS John F. Voelkel, Brooklyn, N. Y., assigner, by mesne assignments, to Marie Alina. Bommel Frohlich Application May 13, 1940, Serial No. 334,779

1 Claim.

This invention relates -to a check valve for door closers and checks, and has for its object to prov-ide an improvementl therein whereby the parts operate with `greater facility, are more simple and at the same time the control is improved.

In door closers and checks-of this kind, which operate with oil as a fluid medium, there has been considerable dimculty in adjusting the `passages for the oil so as to determine the amount of oil to pass through. A further difculty yhas been that after door `closers and checks of this kind are installed in the oor of a building, it is very diicult to obtain access thereto for either adjustmentor repair.

The purpose of this invention is to overcome these objections and the invention of the improvement herein described consists in providing regulative means after the doorcloser andcheck have been installed without the necessity of taking the closer andchec-k away from its installed position or without the necessity of removing the coverings either of wood or cement.

For this purpose my invention consists of the improvement hereinafter described, the embodiment of which is shown in the drawing and which Will be nally pointedout in the claim.

In the accompanying drawing:

Figure 1 is an end View of my improved door closer and check.

Figure 2 is a vertical longitudinal sectionftaken on line 2-2 of Figure 1.

Figure 3 is a detailed sectionftaken on the line 3-3 of Figure 1, and

Figure 4 isa detailed section taken on line 4-4 of Figure 2.

Similar characters of reference indicate corresponding parts throughout the Yvarious views.

Referring to the drawing, and vmore particularly to lFigures 1 and 2, `the usual housing is shown in dotted lines in AFigure 1 and indicated by the character I0. This housing has inwardly projecting shoulders I I and upon these shoulders the projecting shoulders I2 of the casing I3 are placed. The shoulders I2 are provided with screw threaded socket portions I4 adapted to receive screw threaded members therein.

Within the casing I3 a piston I5 is arranged, which has a piston pin I6 engaging the piston rod I'I.

The interior of the casing I3 forms a cylindrical member I8, for the movement of the piston I5 and beyond this cylindrical member I8, an enlarged cut-out portion I9 is provided which has a larger diameter than the diameter of the cylindrical portion I B.

The .piston .I is also .provided with a ,conduit 29 yinclined in .position as it `passes through the piston l5 and having Aan enlarged portion 2I in which there .is .placed a Vball 22, held therein `by the pin 23.

The piston head .Ita has a longitudinal conduit A2li and another conduit Aat right ,angles thereto indicated by 25.

The `parts just .described ,are `old and well known.

The vimprovement .in a structure of vthe `kind described consists in providing the exterior of the casing 4I3 witha vertically slidable cylindrical member :38, whichmember has a bore 3;I vextending transversely therethrough. The internal configuration of Athis bereis of general oval or elliptical shape as is .shown inFigure fi. The actual shape .is not important, but what lis important is Athat the bore .should be `larger `than the diameterofthepin 13,3 supportedinthe Walls ofthecasing lSand passing through the bore 3l The lower part of Athis.member 35] is shaped in the form of a cone and indicated by A34 Vso as to rest upon similarly inclined sides 135 in the vcasing I3.

The conically shaped member E4, when resting upon the similarly inclined seats 35, acts to throttle Vthe conduit 25 Yand control the passage of oil or other fluid therethrough.

The external circumferenceof the cylindrical member 3i) is somewhat smallerthanthe circumference or the v bore :Sfiin the casing I3 so that there is Aa freedomof movement, both vertically and transverselyv ofthe cylinder member ,30 Withinvthe .bore 36.01 thecasing I3, the `conically shaped lend .34 finding its own position in respect to the sides 35.

'Theupper part of the cylindrical member it is providedwith a sphericallykshaped concave cavity il?, which is engaged by a similarly shaped end, but .of convex .form indicated by 3.3 of .a rodor spindle 39. This rod 3S has at its other end a screw threaded portion ,dil `which engages Ycorrepass in engaging these registered openings, through the irregularly shaped opening 3l of the cylinder member 39.

There is a certain amount of looseness of movement of the member in respect to the casing I3 due to the fact that the bore 3| is larger than the pin 33. Were the diameter of the pin 33 of exactly the same size as the bore 3|, there would not be this freedom of movement. The invention, however, consists in providing this freedom of movement as described.

Due to the fact that the upper part of the cylinder 33 is provided with the concave portion 31 and the pin 39 is provided with the convex portion 38, the positioning of the cylindrical member 30 is controlled to a certain extent by the spindle 39 in that at whatever position the convex portion 38 may contact with the concave portion 31, a self-aligning of the member 3U with the spindle 39 will take place.

This is important because after the door closer and check has been installed, its adjustment can be carried out without breaking up the floor under which it has been installed. The regulation of the spindle 39 passing through the iioor 42 and being adjustable in respect thereto, permits adjustment of the cylinder member 30 from the outside of the upper part of the floor.

The upper end of the member 39 is provided with a slot 40a for the entrance of a tool so as to rotate the member 39 for adjustment purposes described.

In Figure 3 is shown a check valve which is arranged in the piston I5 in the position shown in Figure 1. This check valve consists of an opening in a seat 49, a cylindrical portion 41 and a screw threaded portion 48.

Within the cylindrical portion 41 is a ball 49 of an exterior diameter almost equal to the interior diameter of the cylindrical wall 41 and the ball is adapted to rest upon a conically inclined shoulder 46 and thereby when so resting thereon, closing the passage 45.

The screw threaded portion 48 of the piston I5 is engaged by a member 50 having an external screw thread 5I engaging the internal screw threads 48 and this member 50 may be provided with a transverse slot to enable the member 50 to be engaged by a screw driver or other tool. This member 50 also has a bore 52 and a conical seat 53 for one end of the spring 35. y

Interposed between the conical seat 53 of the member 53 and the ball 49 is a spiral spring 55, which serves to press the ball 49 against the conical seat 46. By moving the member 50 inwardly, a greater pressure is exerted upon the spring 55 and by moving the member outwardly, a less pressure upon the spring 55 results. This regulation of seating power of the spring 55, which spring presses the ball 49 against its seat 46, is then determined by member 5D. Thus the fluid which passes from the interior of cylinder I8 through the piston I5, from one side to the other of the piston I5, is regulated not alone by the valve 22 in the manner well known, but a more refined and a more accurate regulation results from the use of the regulating device shown in Figure 3.

My device is, therefore, very simple in its construction, may be easily manufactured and may be equally easily installed.

In one embodiment of the invention the center lines or axes of the valve member 30 and the adjusting member 39 are in substantial alinement and disposed substantially vertically and with the cone seat 34 concentric of the longitudinal center or axis of the valve member 30. There is no connection between the members 30 and 39, that is no direct mechanical connection. The longitudinal center or axis of the adjusting member 39 is xed by the support 42 while the center line or axis of the member 30 may move laterally or horizontally within the limits of the pin member 33 in all radial directions to permit the cone 34 to accommodate itself by its weight into a central or proper sealing position upon the casing seat 35 which may be concentrically arranged in the casing uid passage 25.

The ball and socket joint or confronting faces 31, 38 enable this horizontal movement of the valve member 39 with respect to the fixed axis of the adjusting member 39. The surfaces 31, 38 being parts of spheres are self centering causing the floating valve member 35 to seek a central position with respect to the adjusting member 34 Whenever the valve member 30 moves up in response to the pressure of the iiuid or is forced down upon its seat by the pressure of the adjusting member 39 from above.

Having described the invention in character with an embodiment thereof, it is not intended that the invention be limited to the precise form and arrangement, but that the scope of the invention is set forth in the appended claim.

What is claimed is:

A check valve for use in a door closer and check, comprising a valve chamber having a conical valve seat, a valve member in said chamber having a concaved upper end and a lower end conically shaped and adapted to cooperate with said conical valve seat, said valve chamber above said seat being diametrically larger than said valve member to permit relative movement of the latter transversely in said valve chamber, whereby said valve member accommodates itself to said valve seat, said valve member having a transverse opening, a transverse rod of a diameter less than the diameter of said opening secured at its opposite ends to the wall of said valve chamber and spaced from the walls of said opening, said transverse rod and opening forming a loose connection permitting said valve member to flow transversely and longitudinally freely in said chamber between the limits of said loose connection, and adjusting means movable towards and away from said valve member and cooperating with said valve member for adjusting the extent of longitudinal movement of the latter away from said valve seat Within the limits of said loose connection, and having a convex portion cooperating with the concave portion of the `valve member.

JOHN F. VOELKEL.

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