Patent US4190272A successfully refreshed from Google Patents.
US4190272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw lock for interlocking sliding door and windows
Assignee: Individual
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Filing: 1978-07-20
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Granted: 1980-02-26
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Expires: 1998-07-20
Abstract
Abstract A screw lock permanently mounted on a sliding panel includes a finger engageable means mounted on a lock bolt threaded at its distal end. A spring biases the bolt to an unlatched position. A keeper member formed with a threaded opening is mounted on a fixed panel for registration with the threaded lock bolt in the closed panel position. A flange on the sliding panel interlocks with a flange on the fixed panel in the closed position.
Inventors
- 👤 Eugene R. Beard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:55
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/08; E05B65/0864; E05C; E05C5/00; E05C5/02; E05C5/04; Y; Y10; Y10S; Y10S292/00; Y10S292/46; Y10T; Y10T292/00; Y10T292/08; Y10T292/0863; Y10T292/0869; Y10T292/1099
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
204 words
A lock in combination with a pair of closure panels each having a frame member formed with flanges which interlock upon closure and at least one of said panels is slidably mounted in a track; said lock comprising: a. a lock housing affixed to said flange of one of said interlocking frame members and formed with a chamber having first and second axially spaced end walls; b. a lock bolt mounted in said housing for rotatable and axial reciprocating movement having a threaded portion at one end and a manually engageable member at the other end; c. a spring retainer connected to a mid portion of said lock bolt; d. a spring mounted within said chamber between said first wall of said chamber and said spring retainer and mounted to bias said spring retainer toward said second wall; e. a keeper mounted in a notch formed in said flange of the other of said interlocking frame members and formed with a threaded opening for threaded registration with said movable bolt; and f. said flange holding said lock housing is formed with a notch for registration with said keeper when said panels are in the closed position to prevent relative vertical movement of said panels.
Claim 2
Dependent Claim
204 words
A lock in combination with a pair of closure panels each having a frame member formed with flanges which interlock upon closure and at least one of said panels is slidably mounted in a track; said lock comprising: a. a lock housing affixed to said flange of one of said interlocking frame members and formed with a chamber having first and second axially spaced end walls; b. a lock bolt mounted in said housing for rotatable and axial reciprocating movement having a threaded portion at one end and a manually engageable member at the other end; c. a spring retainer connected to a mid portion of said lock bolt; d. a spring mounted within said chamber between said first wall of said chamber and said spring retainer and mounted to bias said spring retainer toward said second wall; e. a keeper mounted in a notch formed in said flange of the other of said interlocking frame members and formed with a threaded opening for threaded registration with said movable bolt; and f. said flange holding said lock housing is formed with a notch for registration with said keeper when said panels are in the closed position to prevent relative vertical movement of said panels.
Claim 3
Dependent Claim
15 words
A lock as described in claim 1 comprising: a. said spring is a cone spring.
Claim 4
Dependent Claim
32 words
A lock as described in claim 1 comprising: a. said spring retainer includes a pin mounted on said bolt and a washer mounted on said bolt between said pin and said spring.
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) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |