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US4865368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide latch gravity lock
Assignee: Smith Corona Corp
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Filing: 1987-12-17
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Granted: 1989-09-12
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Expires: 2007-12-17
Abstract
Abstract The slide latch gravity lock of the present invention includes means which prevent the lock from opening when the article with which the lock is utilized is in its vertical position. When the article is moved from its horizontal position to a vertical position, a ball located within the lock mechanism moves by gravity from a first position wherein it does not restrain movement of the slide latch to a second position where it does.
Inventors
- 👤 Melvin D. McCall
- 👤 Lawrence D. Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:53
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/52; E05B65/5292; Y; Y10; Y10S; Y10S292/00; Y10S292/48; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0997; Y10T292/14; Y10T70/00; Y10T70/70; Y10T70/7153; Y10T70/7169
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
196 words
A slide latch gravity lock for locking first and second portions of an article together, said lock comprising: a fastening device having an eye therein secured to the first portion of the article; a slide latch slidably secured to the second portion of the article, said slide latch includes an integrally formed hook fixedly attached to said slide latch which is moveable into and removable from the eye of the fastening device for locking and unlocking the first and second portions when the article is in a horizontal position, an integrally formed ball housing section, and an integrally formed abutment; a ball supported within said ball housing section when the article is in a horizontal position for allowing said hook to be removed from the eye of the fastening device for unlocking the first and second portions; and means on the second portion for maintaining the ball outside said ball housing section and in the path of said abutment of said slide latch when the article is in a vertical position to cause said abutment to abut against the ball to prevent unlocking movement of said slide latch for locking the first and second portions together.
Claim 2
Dependent Claim
196 words
A slide latch gravity lock for locking first and second portions of an article together, said lock comprising: a fastening device having an eye therein secured to the first portion of the article; a slide latch slidably secured to the second portion of the article, said slide latch includes an integrally formed hook fixedly attached to said slide latch which is moveable into and removable from the eye of the fastening device for locking and unlocking the first and second portions when the article is in a horizontal position, an integrally formed ball housing section, and an integrally formed abutment; a ball supported within said ball housing section when the article is in a horizontal position for allowing said hook to be removed from the eye of the fastening device for unlocking the first and second portions; and means on the second portion for maintaining the ball outside said ball housing section and in the path of said abutment of said slide latch when the article is in a vertical position to cause said abutment to abut against the ball to prevent unlocking movement of said slide latch for locking the first and second portions together.
Claim 3
Dependent Claim
33 words
A slide latch gravity lock as recited in claim 1 further comprising a spring for biasing said slide latch to a position for locating said hook into the eye of the fastening device.
Claim 4
Dependent Claim
24 words
A slide latch gravity lock as recited in claim 1 wherein said ball housing section includes an inclined linear portion for supporting the ball.
Claim 5
Dependent Claim
90 words
A slide latch gravity lock as recited in claim 3 wherein said means for maintaining the ball outside said ball housing section when the article is in a vertical position includes an inclined projection on the second portion which is in alignment with said inclined linear portion of said ball housing section so that when the article is in a vertical position, the force of gravity will cause the ball to roll along said inclined linear portion of said ball housing section onto said inclined projection of the second portion.
Claim 6
Dependent Claim
33 words
A slide latch gravity lock as set forth in claim 1 wherein the first portion of the article is a liquid crystal display housing and the second portion is a typewriter mask portion.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |