Patent US3729772A successfully refreshed from Google Patents.
US3729772A
Expired / Lapsed
US
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Torsion bar hold-open hinge
Assignee: AVM ACQUISITION Co A CORP OF
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Filing: 1972-03-13
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Granted: 1973-05-01
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Expires: 1992-03-13
Abstract
Abstract The torsion bar on the body half of the hinge has a fluted roller rotatably mounted on and movable with one end of it in lieu of the usual arrangement of two such rollers mounted in spaced relation on the door half with rivets and spring washers. This permits using two shouldered pins riveted on a flange on the door half and spaced more or less to meet each customer''s special requirements and serving as the means for actuating the aforesaid single roller to hold the door open in predetermined positions. The fluted roller has a concentric cylindrical shank portion against which a tab on the body half bears under spring loading of the torsion bar to hold the roller against turning except upon rolling contact with the striker pins. Since the fluted roller is always held against turning except during rolling contact with the pins when the shank of the roller is moved clear of the tab it is always assured of proper orientation with the respective pins, which is important because the pins have to register properly with the troughs in the flutes for correct hold-open operation in each open position of the door. The roller has a blind hole to receive the one end of the torsion bar limiting endwise movement of the roller in one direction while a horizontal surface on a flange on the door half has abutment with the flat top surface on the roller to retain it against endwise movement in the other direction, the torsion bar in turn being retained in assembled position on the body half by a flattened portion on the opposite end of the bar.
Inventors
- 👤 J Marchione
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:50
CPC Classifications
E; E05; E05D; E05D11/00; E05D11/10; E05D11/1028; E05D11/1042; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/53; E05Y2900/531
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
205 words
In a hinge comprising a pair of hinge members pivotally connected by a pintle, one of which members is adapted to be secured to a body and the other to a door swingable to and from an open position relative to the body, the improvement consisting in the provision of an elongated torsion bar mounted on one of said members with a preload spring tension therein, the bar having radius arms on opposite ends, the first of which radius arms has a detent end portion on its outer end and the other having an anchor end portion on its outer end, the detent end portion being movable in an arc relative to said torsion bar by deflection of said first radius arm in a direction to increase spring tension in said bar, a roller rotatably mounted on the end of said detent end portion, and a plurality of strikers spaced in a predetermined manner in an arc relative to said pintle on the other of said hinge members so as to have abutment and rolling contact with said roller in door opening movement to deflect said first radius arm to increase spring tension in said torsion bar above preload spring tension for a hold-open action.
Claim 2
Dependent Claim
205 words
In a hinge comprising a pair of hinge members pivotally connected by a pintle, one of which members is adapted to be secured to a body and the other to a door swingable to and from an open position relative to the body, the improvement consisting in the provision of an elongated torsion bar mounted on one of said members with a preload spring tension therein, the bar having radius arms on opposite ends, the first of which radius arms has a detent end portion on its outer end and the other having an anchor end portion on its outer end, the detent end portion being movable in an arc relative to said torsion bar by deflection of said first radius arm in a direction to increase spring tension in said bar, a roller rotatably mounted on the end of said detent end portion, and a plurality of strikers spaced in a predetermined manner in an arc relative to said pintle on the other of said hinge members so as to have abutment and rolling contact with said roller in door opening movement to deflect said first radius arm to increase spring tension in said torsion bar above preload spring tension for a hold-open action.
Claim 3
Dependent Claim
22 words
A hinge structure as set forth in claim 1 including stop means for positively limiting door opening movement in fully opened position.
Claim 4
Dependent Claim
40 words
A hinge structure as set forth in claim 1 wherein the roller is fluted and the strikers are generally cylindrical pins adapted each to fit in the troughs of the flutes in rolling action of said roller on said pins.
Claim 5
Dependent Claim
93 words
A hinge structure as set forth in claim 1 wherein the roller is fluted and the strikers are generally cylindrical pins adapted each to fit in the troughs of the flutes in rolling action of said roller on said pins, said fluted roller having a concentric reduced cylindrical shank portion which, when the roller is not engaging one of said pins, is spring pressed by the torsion action of said torsion bar into frictional engagement with a surface in a fixed predetermined spaced relationship to said detent end portion of said torsion bar.
Claim 6
Dependent Claim
153 words
A hinge structure as set forth in claim 1 wherein the roller is fluted and the strikers are generally cylindrical pins adapted each to fit in the troughs of the flutes in rolling action of said roller on said pins, said fluted roller having a concentric reduced cylindrical shank portion which, when the roller is not engaging one of said pins, is spring pressed by the torsion action of said torsion bar into frictional engagement with a surface in a fixed predetermined spaced rElationship to said detent end portion of said torsion bar, the latter spacing being such that the shank portion of said roller is moved clear of the surface mentioned in the rolling of the fluted roller on either one of said pins so as to avoid frictional drag during the rolling action and yet have the hold on the roller help to hold the door in a given open position.
Claim 7
Dependent Claim
90 words
A hinge structure as set forth in claim 1 wherein the roller having a blind hole provided therein to receive the end of the detent end portion of said torsion bar whereby to limit endwise movement of said roller in one direction from assembled position, and the hinge member carrying the strikers having a flat surface engaging the outer end of the roller to prevent endwise displacement thereof from said detent end portion throughout the movement of said hinge members relative to one another in door opening and closing movements.
Claim 8
Dependent Claim
126 words
A hinge structure as set forth in claim 1 wherein the roller having a blind hole provided therein to receive the end of the detent end portion of said torsion bar whereby to limit endwise movement of said roller in one direction from assembled position, and the hinge member carrying the strikers having a flat surface engaging the outer end of the roller to prevent endwise displacement thereof from said detent and portion throughout the movement of said hinge members relative to one another in door opening and closing movements, there being means for holding said torsion bar against endwise movement relative to its supporting hinge member, whereby to keep said roller in operative relationship to the strikers and the other hinge member carrying the same.
Claim 9
Dependent Claim
109 words
A hinge structure as set forth in claim 1 wherein the roller is fluted and the strikers are generally cylindrical pins adapted each to fit in the troughs of the flutes in rolling action of said roller on said pins, said pins having reduced concentric end portions received with a closed fit in holes provided in a flange on the other hinge member, the holes being located according to the specific hold-open requirements of the hinge and being differently located to meet different hold-open requirements on different hinges, the extremities of the reduced end portions protruding from the holes and being upset to secure the pins permanently in place.
Claim 10
Dependent Claim
55 words
A hinge structure as set forth in claim 1, wherein the roller is fluted and has a concentric blind hole provided therein opening from one end to receive the end of the detent end portion of said torsion bar, said roller having a reduced cylindrical shank portion concentric therewith for rolling contact with said striker.
Claim 11
Dependent Claim
26 words
The structure as set forth in claim 9, wherein the fluted roller has a hole provided in the wall forming the closed end of the bore.
Claim 12
Dependent Claim
22 words
The structure set forth in claim 9, wherein the blind hole in said fluted roller has a longitudinally extending groove provided therein.
Claim 13
Dependent Claim
21 words
The structure set forth in claim 9, wherein the blind hole in said fluted roller has longitudinally extending grooves provided therein.
Claim 14
Dependent Claim
25 words
The structure set forth in claim 9, wherein the blind hole in said fluted roller has longitudinally extending grooves provided therein in diametrically opposed relationship.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |