US3591224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Divided thumbpiece latch
Assignee: AMERICAN BUILDERS HARDWARE Corp
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Filing: 1969-09-26
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Granted: 1971-07-06
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Expires: 1989-09-26
Abstract
Abstract A handle and latch assembly for a door having a thumbpiece actuating a retractable latchbolt from engagement with a strike. A generally upright handle is mounted on the door with the thumbpiece having a single actuating shank behind the upper end of the handle and a divided or bifurcated thumb-engaging portion extending around and outwardly of the upright handle with the bifurcation allowing movement of the thumbpiece relative to the handle.
Inventors
- 👤 Robert K Unter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:40
CPC Classifications
E; E05; E05C; E05C1/00; E05C1/08; E05C1/12; E05C1/14; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0974; Y10T292/57
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
111 words
In a latchbolt assembly for a door, the combination of an elongated upright handle secured to the door, and a thumbpiece pivotally mounted in the door behind the upper portion of the handle and spaced from the ends of the handle, said thumbpiece having a central rearwardly extending stem and a wider exposed forward portion with diverging edges, and thumbpiece being bifurcated at the front edge by a U-shape notch into a pair of arms extending outwardly at both sides of and generally encompassing and spanning the upper portion of the handle with said handle projecting through said notch to provide for pivotal movement of the thumbpiece relative to the handle.
Claim 2
Dependent Claim
111 words
In a latchbolt assembly for a door, the combination of an elongated upright handle secured to the door, and a thumbpiece pivotally mounted in the door behind the upper portion of the handle and spaced from the ends of the handle, said thumbpiece having a central rearwardly extending stem and a wider exposed forward portion with diverging edges, and thumbpiece being bifurcated at the front edge by a U-shape notch into a pair of arms extending outwardly at both sides of and generally encompassing and spanning the upper portion of the handle with said handle projecting through said notch to provide for pivotal movement of the thumbpiece relative to the handle.
Claim 3
Dependent Claim
79 words
In a latchbolt assembly as set forth in claim 1, in which a pair of spaced backplates are secured to the door with the handle being secured to said backplates, the central stem of said thumbpiece extending through one of said backplates and into cooperative engagement with actuating mechanism for a latchbolt, said central stem having a notch on its lower surface acting as a fulcrum and a lifting surface on its upper surface cooperating with the actuating mechanism.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |