Patent US3918751A successfully refreshed from Google Patents.
US3918751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latch device
Assignee: General Electric Co
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Filing: 1974-09-20
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Granted: 1975-11-11
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Expires: 1994-09-20
Abstract
Abstract A latch device for street lighting luminaires for latching a refractor closure to the luminaire housing. The device comprises a catch on the housing, a slot formed in the closure adjacent to the catch in the closed assembly, spaced bearing means integrally formed in the closure on opposite ends of the slot, a lever extending through the slot and formed integrally with a hook portion on the interior side of the closure engageable with the catch. The lever is formed intermediate its ends with opposite laterally projecting shoulder portions separably engaging the spaced bearing means for rocking therein about a pivot axis. A coil spring engages the lever and the closure for retaining the lever in engagement with the bearing means and for urging it in a rotary direction about the pivot axis for holding the hook portion in yieldable engagement with the catch. The lever has a hinged extension arm at its outer end and spring means to hold the extension arm in retracted position when not in use.
Inventors
- 👤 Walter R Blake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:45
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/08; F21S8/085; F21S8/086; E; E05; E05C; E05C3/00; E05C3/12; E05C3/16; E05C3/22; E05C3/30; F21V; F21V17/00; F21V17/10; F21V17/16; F21V17/166; F21V17/107; Y; Y10; Y10S; Y10S292/00; Y10S292/31; Y10T; Y10T292/00; Y10T292/08; Y10T292/0911; Y10T292/0926; Y10T292/0928; Y10T292/0932
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
170 words
A closure device comprising, in combination, a housing having an opening, closure means for closing said opening, and latch means for releasably securing said closure means to said housing comprising a catch on said housing, first bearing means on said closure means defining a bearing axis, a lever having opposite ends and having second bearing means intermediate its ends engaging said first bearing means for turning about said bearing axis, said lever having a hook portion at one end engageable with said catch, first spring means for urging said lever about said bearing axis for holding said hook portion in yieldable engagement with said catch, tab means pivotally secured to said lever at the other end thereof, said tab means being turnable to an operative projecting position engaging and forming an extension of said lever for operating the same and turnable to an inoperative retracted position away from said projecting position and disengaged from said lever, and second spring means for urging said tab means into said inoperative retracted position.
Claim 2
Dependent Claim
170 words
A closure device comprising, in combination, a housing having an opening, closure means for closing said opening, and latch means for releasably securing said closure means to said housing comprising a catch on said housing, first bearing means on said closure means defining a bearing axis, a lever having opposite ends and having second bearing means intermediate its ends engaging said first bearing means for turning about said bearing axis, said lever having a hook portion at one end engageable with said catch, first spring means for urging said lever about said bearing axis for holding said hook portion in yieldable engagement with said catch, tab means pivotally secured to said lever at the other end thereof, said tab means being turnable to an operative projecting position engaging and forming an extension of said lever for operating the same and turnable to an inoperative retracted position away from said projecting position and disengaged from said lever, and second spring means for urging said tab means into said inoperative retracted position.
Claim 3
Dependent Claim
62 words
A device as defined in claim 1, said tab means comprising a plate member having a gripping portion, a contact portion and pivot bearing means between said portions defining a pivot axis, said contact portion in said operative projecting position of said tab means engaging said lever on the side of said pivot axis away from said other end of said lever.
Claim 4
Dependent Claim
28 words
A device as defined in claim 2, said plate member in said inoperative retracted position lying substantially along the plane of said closure means and closely adjacent thereto.
Claim 5
Dependent Claim
219 words
A closure device comprising, in combination, a housing having an opening, closure means for closing said opening, and latch means for releasably securing said closure means to said housing comprising a catch on said housing, first bearing means on said closure means defining a bearing axis, a lever having opposite ends and having second bearing means intermediate its ends engaging said first bearing means for turning about said bearing axis, said lever having a hook portion at one end engageable with said catch, first spring means for urging said lever about said bearing axis for holding said hook portion in yieldable engagement with said catch, tab means pivotally secured to said lever at the other end thereof, said tab means being turnable to an operative projecting position forming an extension of said lever for operating the same and turnable to an inoperative retracted position away from said projecting position, and second spring means for urging said tab means into said inoperative retracted position, said tab means comprising a plate member having a gripping portion, a contact portion and pivot bearing means between said portions, said contact portion engaging said lever in said operative projecting position of said tab means, said second spring means bearing against said lever and said plate member on opposite sides of said pivot bearing means.
Claim 6
Dependent Claim
219 words
A closure device comprising, in combination, a housing having an opening, closure means for closing said opening, and latch means for releasably securing said closure means to said housing comprising a catch on said housing, first bearing means on said closure means defining a bearing axis, a lever having opposite ends and having second bearing means intermediate its ends engaging said first bearing means for turning about said bearing axis, said lever having a hook portion at one end engageable with said catch, first spring means for urging said lever about said bearing axis for holding said hook portion in yieldable engagement with said catch, tab means pivotally secured to said lever at the other end thereof, said tab means being turnable to an operative projecting position forming an extension of said lever for operating the same and turnable to an inoperative retracted position away from said projecting position, and second spring means for urging said tab means into said inoperative retracted position, said tab means comprising a plate member having a gripping portion, a contact portion and pivot bearing means between said portions, said contact portion engaging said lever in said operative projecting position of said tab means, said second spring means bearing against said lever and said plate member on opposite sides of said pivot bearing means.
Claim 7
Dependent Claim
35 words
A device As defined in claim 4, including a pivot pin interconnecting said lever and said plate member at said pivot bearing means, said second spring means having coil portions extending around said pivot pin.
Claim 8
Dependent Claim
93 words
A device as defined in claim 1, said closure means having front and rear ends and being movably secured at its rear end for movement between closed and open positions relative to said housing, said closure means being formed with a slot at its front end, said first bearing means comprising spaced bearings formed in said closure means at opposite ends of said slot, said lever extending through said slot and formed intermediate its ends with opposite laterally projecting shoulder portions engageable with said spaced bearings for rocking therein about said bearing axis.
Claim 9
Dependent Claim
38 words
A device as defined in claim 6, said first spring means having opposite ends respectively engaging said lever and said closure means and being the sole means to retain said lever in engagement with said first bearing means.
Claim 10
Dependent Claim
35 words
A device as defined in claim 1, said closure means formed with a downwardly opening cavity in the region of said latch means, said tab means substantially covering said opening in said retracted position thereof.
References Cited (Backward Citations)
US3455590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |