US2493117A

US2493117A - Hydraulic checking hinge

Info

Publication number: US2493117A
Application number: US691559A
Authority: US
Inventors: Henry S Diebel
Original assignee: G G BAKEWELL
Current assignee: G G BAKEWELL
Priority date: 1946-08-19
Filing date: 1946-08-19
Publication date: 1950-01-03
Anticipated expiration: 1967-01-03

Description

Jan. 3, 1950 H. s. DIEBEL 2,493,117

HYDRAULI C CHECKING HINGE Filed Aug. 19, 1946 2 Sheets-Sheet 1 FIG. I.

EOR

I" II|I HENRY. S. DIEBEL ATTORNEY Jan. 3, 1950 I H. s. DIEBEL 2,493,117

HYbRAULIC CHECKING HINGE Fil ed Aug. 19, 1946 2 Sheets-Sheet 2 33 I ATTORNEY Patented Jan. 3, 1950 UNl'FE-D STATi ES:

HYDRAULIGLCHEOKINGcHINGE Henry.S.,Diebel,.Downey, Califi, assignor to G2 G. Bakewell, Pasadena; Calif.

ApplicationAugust 19, 1946;;Serial- No; 691,559."

vention which. will .-be=described'-bel0W,-: and will.

be understood from-the description and the ac-. companyingdrawings in which :;v

Fig. 1 is a cross-sectional view .partlyimsectionshowing a preferred.formsotthe hydraulic check.- ing. hinge of my inventiom Fig. 2 is atopview 'ofmy checking hinge,=show-- ing the attachment-t the hingeleaves: to-.a=door and to a doorframe;..

Fig: 3 is a'crossesectionalview taken-,on the line 33 of Fig. 1;

Fig;. i is. a cross-.sectionaluviewitaken on the line 4-4 of .Figgl Fig. 5. is a cross-sectional..viewwtakenon the line 55 of Fig.1;

Fig. 6 is a.cross-sectionalviewsimilar to Fig.4, but with the hinge leaves:-partly .open; and

Fig. 7 is a .-crossesectional..viewl-takenon the line 'l-'l of. Fig. 3.-

Referring: to. the-drawings, the hydraulic checking hinge El consists..of:.a:.casing..II having a cylindrical cavity and an..attached,or vintegral leaf l2, with countersunkscrewzholes 13 for attaching the leai tolthe door frameqF. A hinge pin-l4 is mountedin the cavity, thehinge pin being pivotedv in the-bearing. I5 .in theibottom. of the casing II. A .pair ofasleevesbearings -IB :is provided at ,the..upper end. ofwthe. cavity, .being held in place by .the-closure..bushing.-. I! .which is screw-threaded intothe top of the. cavity.- A rubber-like seal-ing...ring i8 is provided in the space between the ends of the sleeve bearings l6 adapted to prevent any leakage=-of hydraulic fluid. up the hinge. pin, 1 4... A: reservoir. cup I 9 1 is provided in the upper end ofithe. cavity below the closure bushing l1, locking rings and 2| being provided'to-hol'd the reservoir 'cup in position. Below the reservoinzcup. I9 is provideda segmental partition -member: or.:.-dam 22 whose radial ends formthe end. wallszof aaworkingch'am- 2. ber..23-for. thehydraulic piston. 24 whichisatw tachedtothe hinge pin .14 within. theworking chamber. The segmentalpartition member or damazzrisl preferablymade integrally with the casing; H. The reservoir .cup .l9 is positioned radially bymeans. .of the .dowel pin 25in corre-' spondingholes. inthe-dam andthje reservoir cup, Thefiowcof hydraulic-liquidfrom one side of the piston .24 to the. other. during the movement "of the piston inthe, workingchamber is controlled by variable constricted conduits to give the se-" lected effects upon the door opening and closing.

The upper end-of the hinge pin I4 is provided with an axial hole 26in which. the metering pin 2'! slides, the upper portion of the hole 26 being.

. pin'ld'leadingiromone'side of thepiston .24to

the other. Byadjusting the position of the meter-- ing pin 21 relative to the hole 33, the -,hydraulic friction-of the hydraulic liquid passing through this hole may be regulated; Also a one+wayconduit St is provided throughthe hinge pin [4 within the working; chamber 23, this one-way 'conduit having agseatedjbail 35 and retainer -36theref0r whichpermits the liquid to flow'freely'from one side .of thepiston to the other, but shuts "oft-the flow whenthe movement is in-the opposite 'direc-' tion:

The reservoir. :cup "l 9 is hydraulicallyconnected to the working chamber by two check-valved ori-.' fices 3'! which permit the "hydraulic fluid to flow from, the reservoir into the working chamberion either sideof the piston but prevent it. from flow: ing in the opposite direction. The hydraulic liquid in the reservoir is non-pressured and in the 'eventthatany hydraulic liquid leaks out of the working-chamber,- it 'is replenished from the reservoir'when-a-reduced pressure results in the working chamber on one side of the piston from the rotary movement of the-piston." The lower surface of-the-reservoircup serves as the upp r wall of the =working- 'cham'ber 23. This surface within the working chamber is provided with a groove or grooves of various sizes which affect the hydraulic friction at diflerent angular positions of the piston. As shown, the groove 38 starting from the open position of the hinge is large enough in cross-sectional area so that substantially no hydraulic friction is introduced in the initial movement of the hydraulic piston 24 from the open position of the hinge. As the piston approaches the closed hinge position, a tapered constricted groove 39 is provided for a few degrees of rotation to retard the movement, and as the hinge (and the door) approaches complete closing, the unrestricted groove 40 is provided, so that the energy from a closing force will cause the attached door to close completely into the latch. In the opposite direction of movement of the piston, the hydraulic liquid flows freely through the one-way conduit 34 so that the grooves in the reservoir bottom do not affect the hydraulic friction in the opening direction of movement. As noted above, the reservoir cup l9, including the bottom thereof which serves as a closing wall for the working chamber, is readily removed and replaced by taking out the closure bushing II and the

locking rings

20 and 2|. This arrangement permits changing the reservoir and its

grooves

38, 39 and 40, and consequently changing the hydraulic friction or checking effect to any desired position in the cycle, and to any desired amount. Interchangeable reservoir cups with different by-pass grooving may be provided, so that the selected door checking may be had by inserting the proper cup at the time of original installation, or at any subsequent time.

The other leaf 4! which is usually attached to the edge of the door D by screw holes I3, is provided with a split hub member 42 having an axial hole 43 adapted to engage the upper end portion of the hinge pin it. Clamp screws 44 are provided in the hub member 42 to hold it non-rotatably on the hinge pin 14. A closing cap 45 may be provided to cover the knurled adjusting knob 28 of the metering pin.

I claim:

1. In an hydraulic checking hinge, two hinge leaves, an hydraulic cylinder attached to one of said leaves, a fixed partition defining a segmental working space in said cylinder, a rotary piston in said working space, a shaft for said rotary piston rotating therewith and attached to the other hinge leaf, a closing end wall for said working space adjacent the end sliding surface of said piston, a non-pressured liquid reservoir adjacent said cylinder having one-way conduits to said cylinder adapted at times to deliver hydraulic liquid to one or the other side of said piston, said shaft serving as a hinge pin, grooves in said end closing wall adapted to convey hydraulic liquid with variable degrees of frictional resistance from one side of the piston to an opposite side, whereby to control the resistance to movement of said hinge at selected positions.

2. In an hydraulic checking hinge, two hinge leaves, an hydraulic cylinder attached to one of said leaves, a fixed partition defining a segmental working space in said cylinder, a rotary piston in said working space, a shaft for said rotary piston rotating therewith and attached to the other hinge leaf, an interchangeable liquid reservoir disposed adjacent said cylinder and having its bottom wall forming a piston-contacting surface within said working space, one-way conduits between said reservoir and said cylinder, said oneway conduits being disposed to at times admit liquid to said cylinder from said reservoir on one or the other side of said piston, said shaft serving as a hinge pin, a one-way liquid passage through said piston adapted to convey fluid from one side of said piston to an opposite side within the working space, and a tapering groove in said bottom wall adapted to by-pass hydraulic liquid around said piston under varying degrees of liquid resistance.

3. In an hydraulic hinge having hinge leaves operating on a hinge pin and a concentric hydraulic cylinder attached to one of said leaves and provided with an internal working space, with a rotary piston movable in said working space; an interchangeable non-pressured liquid reservoir adapted to be placed adjacent said cylinder and forming one wall thereof, one-way conduits between said reservoir and said cylinder, said one-Way conduits being adapted to at times admit hydraulic liquid to said cylinder from said reservoir on one or the other side of said piston, the outside face of the wall of said reservoir being provided with groove means disposed in positions to be passed over by said piston, said groove means having varying crosssectional areas and being adapted to control the hydraulic friction in passing liquid from one side of said piston to the other.

4. In an hydraulic checking hinge having hinge leaves and an hydraulic cylinder and piston arrangement to control the hydraulic friction, a removable interchangeable liquid reservoir adjacent said cylinder, one-way conduits between said reservoir and said cylinder, said one-way conduits being disposed to at times admit liquid to said cylinder from said reservoir on one or the other side of said piston, a one-way fluid passage through said shaft adapted to convey fluid from one side of said piston to an opposite side within the cylinder, and means including a groove having different cross-sectional areas at different positions linearly of said groove in the contact surface between said piston and the bottom of said reservoir, for varying the hydraulic friction in said hinge.

5. In an hydraulic checking hinge having a cylinder, a shaft, a fixed partition, and a rotary piston, with the shaft serving as a hinge pin, a one-way check-valved fluid passage in said shaft adapted to convey fluid from one side of said piston to an opposite side, and means including by-pass grooves in a contact surface passed over by said rotary piston, at least one of said grooves being of tapered conformation to gradually check the movement of said piston in a part of its stroke in the closing direction.

6. In an hydraulic checking hinge having a cylinder, a shaft, a fixed partition, and a rotary piston, with the shaft serving as a hinge pin, a one-way check-valved fluid passage in said shaft adapted to convey fluid from one side of said piston to an opposite side, and by-pass grooves in a removable member constituting a portion of the contact surface passed over by said rotary piston.

HENRY S. DIEBEL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,837,716 Johnsen Dec. 22, 1931 2,159,067 Weiser May 23, 1939 2,216,695 Potter Oct. 1, 1940