US3193315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door latches
Assignee: Micro and Precision Mouldings Cheltenham Ltd
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Filing: 1962-05-11
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Granted: 1965-07-06
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Expires: 1982-05-11
Abstract
No abstract record available.
Inventors
- 👤 James Michael Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:19
CPC Classifications
E; E05; E05C; E05C1/00; E05C1/08; E05C1/12; E05C1/16; E05B; E05B13/00; E05B13/005; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0977; Y10T292/0982; Y10T292/0986; Y10T292/0989
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A DOOR LATCH COMPRISING A HOUSING, A LATCH BOLT SLIDABLY MOUNTED IN SAID HOUSING, A LATCH SPRING URGING THE BOLT TO THE LATCHING POSITION IN WHICH IT PROJECTS FROM THE OUTER END OF SAID HOUSING, AN OPERATING SHAFT ADAPTED TO BE ROTATIONALLY COUPLED TO DOOR HANDLES RESPECTIVELY MOUNTED ON OPPOSITE SIDES OF THE DOOR, SAID BOLT BEING APERTURED TO ALLOW PASSAGE OF SAID SHAFT LATERALLY THERETHROUGH AND THE SHAFT BEING AXIALLY DISPLACEABLE FROM ONE SIDE OF THE DOOR FROM A POSITION IN WHICH ROTATION OF THE HANDLES WITHDRAWS THE BOLT FROM THE LATCHING POSITION OF THE RELEASE THE LATCH TO A LOCKING POSITION IN WHICH THE SHAFT IS INOPERATIVE ON TURNING THE HANDLE ON THE OTHER SIDE OF THE DOOR TO RELEASE THE LATCH, AND DETENT MEANS WHICH ARE MOUNTED IN THE BOLT ON THE INNER SIDE OF THE SHAFT AND AUTOMATICALLY COME INTO OPERATION WHEN THE SHAFT IS DISPLACED TO THE LOCKING POSITION AND ACT TO RETAIN THE SHAFT IN THAT POSITION, THE DETENT MEANS BEING AUTOMATICALLY DISENGAGED FROM THE SHAFT ON INWARD MOVEMENT WITH THE LATCH BOLT FROM THE LATCHING POSITION.
Claim 2
Dependent Claim
183 words
A DOOR LATCH COMPRISING A HOUSING, A LATCH BOLT SLIDABLY MOUNTED IN SAID HOUSING, A LATCH SPRING URGING THE BOLT TO THE LATCHING POSITION IN WHICH IT PROJECTS FROM THE OUTER END OF SAID HOUSING, AN OPERATING SHAFT ADAPTED TO BE ROTATIONALLY COUPLED TO DOOR HANDLES RESPECTIVELY MOUNTED ON OPPOSITE SIDES OF THE DOOR, SAID BOLT BEING APERTURED TO ALLOW PASSAGE OF SAID SHAFT LATERALLY THERETHROUGH AND THE SHAFT BEING AXIALLY DISPLACEABLE FROM ONE SIDE OF THE DOOR FROM A POSITION IN WHICH ROTATION OF THE HANDLES WITHDRAWS THE BOLT FROM THE LATCHING POSITION OF THE RELEASE THE LATCH TO A LOCKING POSITION IN WHICH THE SHAFT IS INOPERATIVE ON TURNING THE HANDLE ON THE OTHER SIDE OF THE DOOR TO RELEASE THE LATCH, AND DETENT MEANS WHICH ARE MOUNTED IN THE BOLT ON THE INNER SIDE OF THE SHAFT AND AUTOMATICALLY COME INTO OPERATION WHEN THE SHAFT IS DISPLACED TO THE LOCKING POSITION AND ACT TO RETAIN THE SHAFT IN THAT POSITION, THE DETENT MEANS BEING AUTOMATICALLY DISENGAGED FROM THE SHAFT ON INWARD MOVEMENT WITH THE LATCH BOLT FROM THE LATCHING POSITION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |