Patent US3755987A successfully refreshed from Google Patents.
Patent US3840936A successfully refreshed from Google Patents.
US3840936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hinge
Assignee: Individual
•
Filing: 1972-09-25
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Granted: 1974-10-15
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Expires: 1992-09-25
Abstract
Abstract A hinge for holding a door in an open position and controlling the movement of the door toward its open or closed positions, is disclosed. The hinge includes a fixed leaf having joining parts or knuckles thereof rigidly secured to a hinge pintle, a movable leaf having joining parts or knuckles thereof rotatably connected to the pintle, at least one cam rigidly secured to the pintle, the at least one cam having a curved surface and adapted to control movement of the movable leaf or door, and a spring secured to the movable leaf intermediate its ends and the ends thereof attached to a roller which travels along the curved surface of the cam.
Inventors
- 👤 J Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:49
CPC Classifications
E; E05; E05D; E05D11/00; E05D11/06; E05D11/10; E05D11/1007; E05F; E05F5/00; E05F5/006; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
An integral hinge and hinge stop device for holding doors and the like having hinge pintles, comprising a fixed hinge leaf and a movable hinge leaf having joining knuckles pivotally connected to said hinge pintle, a plurality of cams fixed to said pintle, each having a different curved surface, a plurality of springs rigidly secured to the movable leaf intermediate the ends of said springs and a roller means or cam follower attached to each of the spring ends and positioned to move along the curved surfaces of the cams, said cams, said springs and said roller means coacting to control the movement of the movable leaf.
Claim 2
Dependent Claim
107 words
An integral hinge and hinge stop device for holding doors and the like having hinge pintles, comprising a fixed hinge leaf and a movable hinge leaf having joining knuckles pivotally connected to said hinge pintle, a plurality of cams fixed to said pintle, each having a different curved surface, a plurality of springs rigidly secured to the movable leaf intermediate the ends of said springs and a roller means or cam follower attached to each of the spring ends and positioned to move along the curved surfaces of the cams, said cams, said springs and said roller means coacting to control the movement of the movable leaf.
References Cited (Backward Citations)
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US1636019A
Cited
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Cited
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Cited
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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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |