Patent US4048695A successfully refreshed from Google Patents.
US4048695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door check and closure device
Assignee: Individual
•
Filing: 1975-11-20
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Granted: 1977-09-20
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Expires: 1995-11-20
Abstract
Abstract This invention relates to a door closer and holder having a longitudinally movable rod containing a niche which rests against a stop plate to hold the door in an open position. A rotating cam is positioned adjacent the niche in the rod so that further movement of the rod in a longitudinal matter rotates the cam causing the rod to ride over and bypass the stop plate allowing the door to close.
Inventors
- 👤 Otto H. Juilfs
- 👤 Donald R. Juilfs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:29
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/22; E05F3/223; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10S; Y10S16/00; Y10S16/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
A door closure device comprising a cylindrical shell, a spring disposed within said shell, a piston rod adapted to interact with said spring for resisting the opening of a door and for causing closing of a door, a slot disposed longitudinally in said rod, a plate fixedly mounted in said shell against which one end of the spring rests, a slot cut into said plate, a key within said slot which is adapted to engage a niche in said rod to hold a door in an open position, a rotatable cam rotatably mounted within the slot in the rod adapted to allow the key to override the niche in said rod to allow a door to close.
Claim 2
Dependent Claim
117 words
A door closure device comprising a cylindrical shell, a spring disposed within said shell, a piston rod adapted to interact with said spring for resisting the opening of a door and for causing closing of a door, a slot disposed longitudinally in said rod, a plate fixedly mounted in said shell against which one end of the spring rests, a slot cut into said plate, a key within said slot which is adapted to engage a niche in said rod to hold a door in an open position, a rotatable cam rotatably mounted within the slot in the rod adapted to allow the key to override the niche in said rod to allow a door to close.
Claim 3
Dependent Claim
17 words
The device of claim 1 wherein a spring biases said key in the direction of said rod.
Claim 4
Dependent Claim
15 words
The device of claim 1 comprising a leaf spring to resist rotation of said cam.
References Cited (Backward Citations)
GB190601177A
Cited
US3555591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |