US3110924A

US3110924A - Door closer

Info

Publication number: US3110924A
Application number: US150268A
Authority: US
Inventors: Wartian George
Original assignee: Individual
Current assignee: Individual
Priority date: 1961-11-06
Filing date: 1961-11-06
Publication date: 1963-11-19
Anticipated expiration: 1980-11-19

Description

G- WARTIAN Nov. 19, 1963 DO0R`CLOSER Filed Nov. 6, 1961 iialW #naw/VIVA'.

INVENTOR.

United States Patent O 3,119,924 DQQR @MEER George War-lian, East Detroit, Mich. Wartian Lock Co., 20525 E. Nine Mile Road, St. Clair Shores, Mich.) Filed Nov. 6, i961, Ser. No. 150,268 2 Claims. Cl. 1li- 52) This invention relates to a door closer and has particular reference to a door closer in which a piston is adapted to compress a spring as the door is opened and in which the rate of closing of the door is controlled by forcing a [liquid trapped behind the piston through a restricted bleed orifice. The construct-ion of the present door closer is such that the hydraulic liquid is contained within 'the cylinder on only one side of the piston and does no-t flow through the piston or valve devices carried by the piston, thereby eliminating the need for a seal between the cylinder and the piston rod which is attached to the door.

A principal object of the invention lis to provide a new and improved spring actuated hydraulically regulated door closer.

Another object of the invention is to provide a door closer which is simple in construction and eloien't in operation.

A further yobject of the invention is to provide a door closer having an improved means of regulating the closing movement of the door.

Other and further objects of the invention will be apparent rom the fol-lowing description and claims and may be understood by reference to the accompanying drawing, which by way of illustration shows a preferred embodiment of the invention and what l now consider to be the best mode of applying the principles thereof. Other embodiments of the invention may be used without departing from the scope of the present invention `as set forth in the appended claims.

In the drawing:

FIG. l is a side elevational view of the doo-r closer;

FIG. 2 is a sectional view taken yon line 2--2 of FIG. 4;

FIG. 3 is a sectional view taken on line 3 3 of FlG. 4; and

FIG. 4 is a sectional view taken on lin-e 4-4 of FIG. 2.

The door closer comprises a housing itl having a hinge member l2 projecting from one end thereof and adapte to receive a pin i4 for pivotally connecting the housing lll to a bracket lo secured to the door frame i3. The housing defines a reservoir 2? adapted to contain a supply of liquid such as oil and is provided with a Cover plate 22 secured thereto in any suitable manner. ie housing further includes a boss 2d projecting downwardly from its bottom wall at one end thereof. The boss is provided with a cavity deiining a valve chamber 26 which is threaded at its outer end to receive the inner end of a cylinder 28 in the form of a cylindrical tube. A piston Btl is reciprocable within the cylinder 2S and includes a washer 32 secured thereto by a rivet 3d on the end of the pis-ton rod 36, The piston rod 3o projects through the end Zcap 3S on the outer end `of the cylinder .Z5 and is pivotally connected to a bracket il by mean-s of a pin d2. The bracket lil is secured to the door 19, although it will be apparent that the housing could be mounted on the door and the piston rod mounted on the door frame ii desired.

A passage 44 provides communication between the reservoir Ztl and the valve chamber. A valve seat Li6 is formed around the passage 4dwhere the latter enters the chamber 2,6. A valve member d is slidable axially within the chamber 26 and is provided with a restricted opening l! therein in line with the passage 44. The valve member 48 is provided with a series of notches 52 in its 3,1 W392i Patented Nov. i9, i963 ice outer periphery defining passages for the unrestricted ow of liquid past the valve member 41S into the inner end of the cylinder 2S when the valve member d is disengaged from the valve seat d6, as shown in the drawing.

When the door is opened the piston 3d will be moved by the piston rod 35l outwardly through the cylinder 2S against the force of the spring 5d which is conlined between the piston 3d and the end leap 3d, thus providing a predetermined resistance to opening movement oi the door. The movement of the piston through the cylinder will reduce the pressure within the valve chamber 26 suiciently to pull the valve member 48 away from the valve seat 46 so as to permit substantially unrestricted flow of oil from the reservoir 261 through passage 4.4 and around valve member d8 into the left-hand end of the cylinder' 28.

When the door is released, the spring 54 will force piston Se to the left and the increased pressure in the valve chamber 26 will `force the valve member i8 into engagement with its valve seat d6, thereby closing the unrestricted communication between the reservoir 2d and the valve chamber. The liquid thus trapped in the lefthand end of the cylinder 28 and the valve chamber 26 can escape only through the bleed orifice Sil' thereby controlling the rate of closing movement of the door.'

A baille 6d, which is arcuate in cross section as shown in FlG. 2, is located in the bottom of the reservoir Ztl and is provided with elongated cut-out portions 62 at each side thereof. The upper end of the passage 44 opens into the space beneath the battle 6d and the oil returning through lthe passage 44 is prevented by the baille 6d from being ejected directly against the underside of the cover plate 2,2. The icover plate 2,2 is provided with a vent passage 61E communicating with the reservoir 2li. The bali-le d@ prevents the returning liquid from possibly being discharged through the vent passage del and insures that the yliquid above `the baille 6i) will be in a relatively quiescent state.

lt will be seen that the present invention provides a relatively simple device of very few parts but which is very eidcient in operation and will accurately regulate the rate Koff closing of the door. By viL ue of the valve construction used herein the oil is prevent-ed by the seal 312 from reaching the right-hand end of the cylinder 2S and there is therefore no need for a seal between the piston rod 36 and the outer end of the cylinder. The opening in the end cap 38 through which the piston rod extends may be large enough to provide an air vent for the right-hand end of the cylinder.

While I have illustrated and described a preferred embodiment of my invention, it is understood that this is capable of modication, and I therefore do not wish to be limited to the precise details set forth but desire to avail myself of such changes and alterations as fall within the purview of the following claims.

I claim:

l. A door closer comprising a housing having a valve chamber therein, a cylinder having one end threaded into and communicating with said valve chamber and extending outwardly from said housing, a piston reciprocable in said cylinde a piston rod secured to said piston and projecting through the other end of said cylinder, a spring urging said piston toward said one end of said cylinder, a liquid reservoir 4in said housing, a passage in said housing between said reservoir and said valve chamber, a valve seat at one end of said valve chamber around said passage and opposed to said one end of said cylinder, a discshaped valve member slidably mounted in said valve chamber and having a 'restricted opening therethrough aligned with said passage, said valve member being engageable with said valve seat as said piston moves toward lsaid yone end of said cylinder whereby the liquid trapped in said cylinder is discharged back to said reservoir through said restricted opening to regulate movement of said piston toward said one end orf said cylinder, said valve member having notches in its periphery and being movable away from said valve seat in response te the suction created by movement of said piste-n toward the other end of said cylinder thereby to open said passage to permit unrestricted 110W of liquid from said reservoir into said cylinder, and means on said ltiousinfy and on the outer end o-f the said piston rod for pivotaily mounting one of such members on a door lframe and the other on a door.

2. A door closer according to claim 1 including a baffle extending across the bottom of said reservoir, said balie overlying the opening of said passage into said reservoir and being spaced frorntlie botto-rn Wall of said reservoir to define a space finto which the liquid returning from said cylinder' is discharged.

References Cited in the le of this patent UNITED STATES PATENTS 1,386,196 Munn Aug. 2, 1921 1,898,609 Anderson Feb. 2l, 1933 1,931,178 Carlson Oct. 17, 1933 2,239,112 Nickelsen Apr. 22, 1941 2,446,901 Blaisdell et al e Aug. 10, 1948 2,496,166 Keller Jan. 31, 195() 2,722,289 Girard Nov. 1, 1955 2,953,810

Hail Sept. 27, 1960

Claims

1. A DOOR CLOSER COMPRISING A HOUSING HAVING A VALVE CHAMBER THEREIN, A CYLINDER HAVING ONE END THREADED INTO AND COMMUNICATING WITH SAID VALVE CHAMBER AND EXTENDING OUTWARDLY FROM SAID HOUSING, A PISTON RECIPROCABLE IN SAID CYLINDER, A PISTON ROD SECURED TO SAID PISTON AND PROJECTING THROUGH THE OTHER END OF SAID CYLINDER, A SPRING URGING SAID PISTON TOWARD SAID ONE END OF SAID CYLINDER, A LIQUID RESERVOIR IN SAID HOUSING, A PASSAGE IN SAID HOUSING BETWEEN SAID RESERVOIR AND SAID VALVE CHAMBER, A VALVE SEAT AT ONE END OF SAID VALVE CHAMBER AROUND SAID PASSAGE AND OPPOSED TO SAID ONE END OF SAID CYLINDER, A DISCSHAPED VALVE MEMBER SLIDABLY MOUNTED IN SAID VALVE CHAMBER AND HAVING A RESTRICTED OPENING THERETHROUGH ALIGNED WITH SAID PASSAGE, SAID VALVE MEMBER BEING ENGAGEABLE WITH SAID VALVE SEAT AS SAID PISTON MOVES TOWARD SAID ONE END OF SAID CYLINDER WHEREBY THE LIQUID TRAPPED IN SAID CYLINDER IS DISCHARGED BACK TO SAID RESERVOIR THROUGH SAID RESTRICTED OPENING TO REGULATE MOVEMENT OF SAID PISTON TOWARD SAID ONE END OF SAID CYLINDER, SAID VALVE MEMBER HAVING NOTCHES IN ITS PERIPHERY AND BEING MOVABLE AWAY FROM SAID VALVE SEAT IN RESPONSE TO THE SUCTION CREATED BY MOVEMENT OF SAID PISTON TOWARD THE OTHER END OF SAID CYLINDER THEREBY TO OPEN SAID PASSAGE TO PERMIT UNRESTRICTED FLOW OF LIQUID FROM SAID RESERVOIR INTO SAID CYLINDER, AND MEANS ON SAID HOUSING AND ON THE OUTER END OF THE SAID PISTON ROD FOR PIVOTALLY MOUNTING ONE OF SUCH MEMBERS ON A DOOR FRAME AND THE OTHER ON A DOOR.