Patent US3811302A successfully refreshed from Google Patents.
US3811302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock for sliding doors
Assignee: Individual
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Filing: 1972-07-26
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Granted: 1974-05-21
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Expires: 1992-07-26
Abstract
Abstract A lock for sliding doors that is adapted to be easily installed on the lower left, lower right, upper left or upper right-hand corner of the sliding door. The lock prevents the sliding door from being moved in a horizontal or vertical position. The lock includes a housing with a movable plunger mounted therein which has a retracted and locking position. Locking means within the housing lock the plunger in its locking position. Key actuated means activate the locking means to release the plunger so that the plunger may be moved from its locking position to its retracted position.
Inventors
- 👤 D Sorensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:03
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/08; E05B65/0864; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5173; Y10T70/5195; Y10T70/5199; Y10T70/5246; Y10T70/5296; Y10T70/5319
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
201 words
A lock for a sliding door, movable Along a horizontal track, adapted for mounting in any corner of said door comprising: a housing having a vertically extending opening; a plunger, having a slot and a groove, movably mounted in said opening, said plunger having a retracted position and a locked position, and said plunger further having an actuation end extending from said housing when said plunger is in said retracted position, and a locking end extending from said housing when said plunger is in said locked position; a stationary guide pin secured within said housing extending through said slot in said plunger; a spring-biased locking member movably mounted within said housing and adapted to extend into said groove in said plunger when said plunger is in its locked position; a cam engagable with said spring-biased locking member to release said plunger and permit said plunger to be moved to its retracted position; and a securing pin extending outwardly from said housing in a direction perpendicular to said plunger for retarding vertical forces applied to said sliding door, whereby said sliding door cannot be moved along said track, or raised off of said track when said plunger is in said locked position.
Claim 2
Dependent Claim
201 words
A lock for a sliding door, movable Along a horizontal track, adapted for mounting in any corner of said door comprising: a housing having a vertically extending opening; a plunger, having a slot and a groove, movably mounted in said opening, said plunger having a retracted position and a locked position, and said plunger further having an actuation end extending from said housing when said plunger is in said retracted position, and a locking end extending from said housing when said plunger is in said locked position; a stationary guide pin secured within said housing extending through said slot in said plunger; a spring-biased locking member movably mounted within said housing and adapted to extend into said groove in said plunger when said plunger is in its locked position; a cam engagable with said spring-biased locking member to release said plunger and permit said plunger to be moved to its retracted position; and a securing pin extending outwardly from said housing in a direction perpendicular to said plunger for retarding vertical forces applied to said sliding door, whereby said sliding door cannot be moved along said track, or raised off of said track when said plunger is in said locked position.
Claim 3
Dependent Claim
13 words
The lock of claim 1 wherein said cam is actuated by a key.
Claim 4
Dependent Claim
26 words
The lock of claim 1 wherein said housing includes a plurality of openings extending therethrough by which said housing may be attached to said sliding door.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |