Patent US4703404A successfully refreshed from Google Patents.
US4703404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable lighting device
Assignee: Individual
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Filing: 1981-02-17
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Granted: 1987-10-27
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Expires: 2001-02-17
Abstract
Abstract A portable electric lighting device is provided having an open top closable by two rotatable members oppositely hinged. The members allow easy access to the interior of the device for bulb, light filter or lens changing. Heat from the lamp is dissipated by including air vents in the members and constructing at least one member with heavy heat conductive material. The device includes a bulb ejector lever and resilient biasing wires to maintain the bulb in a secure position.
Inventors
- 👤 Charles J. Helton, III
- 👤 George N. Panagiotou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:03
CPC Classifications
F; F21; F21V; F21V29/00; F21V29/50; F21V29/70; F21L; F21L14/00; F21L14/02; F21V29/73; F21V29/74; F21V29/745; F21V29/76; F21V29/83; F21V17/00; F21V17/10; F21V17/107; F21V19/00; F21V19/04; F21V21/00; F21V21/14; F21V21/30; F21W; F21W2131/00; F21W2131/40; F21W2131/406
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
112 words
An electric portable lamp comprising a housing having an open front end and an open top which is closable by first and second members each of which are hinged to upper opposing end portions of said housing whereby the free ends of said members are adjacent each other when closed over the housing top; a bulb mounting assembly positioned within said housing having a bulb mounted therein directed toward the housing open front end, said assembly including a bottom frame secured to said housing supporting an electric contact means for supplying electric power to said bulb; and, a plate secured within said housing having an aperture aligned with said housing front end.
Claim 2
Dependent Claim
112 words
An electric portable lamp comprising a housing having an open front end and an open top which is closable by first and second members each of which are hinged to upper opposing end portions of said housing whereby the free ends of said members are adjacent each other when closed over the housing top; a bulb mounting assembly positioned within said housing having a bulb mounted therein directed toward the housing open front end, said assembly including a bottom frame secured to said housing supporting an electric contact means for supplying electric power to said bulb; and, a plate secured within said housing having an aperture aligned with said housing front end.
Claim 3
Dependent Claim
20 words
The lamp of claim 1 wherein at least one of said members includes openings therethrough for the passage of air.
Claim 4
Dependent Claim
16 words
The lamp of claim 2 wherein at least one of said members comprises a heat sink.
Claim 5
Dependent Claim
30 words
The lamp of claim 1 including spring biasing means mounted in said housing for pressing against the exterior surfaces of said bulb to maintain said bulb in a secure position.
Claim 6
Dependent Claim
67 words
The lamp of claim 4 wherein said apertured plate extends across said housing and is spaced apart from said contact means a distance about equal to the length of said bulb and wherein said spring biasing means comprises resilient wire secured to said frame and the upper portion of said apertured plate in a manner to exert a bias against said bulb proximate opposing side surfaces thereof.
Claim 7
Dependent Claim
22 words
The lamp of claim 2 wherein the openings of at least one of said members include a plurality of upwardly inclined vanes.
Claim 8
Dependent Claim
59 words
The lamp of claim 1 including bulb ejector means comprising a lever pivotaby mounted on said bottom frame having an arm portion underlying said bulb and an upstanding portion adjacent said bulb whereby manual rotation of said upstanding portion will cause said arm portion to exert an upward force against the bulb causing its dislodgement from said contact means.
Claim 9
Dependent Claim
18 words
The lamp of claim 5 including a mounting bracket located co-extensive with said apertured plate within said housing.
Claim 10
Dependent Claim
56 words
The lamp of claim 2 wherein the free end of one of said members includes an outwardly extending lip portion and the free end of the other of said members includes an offset outwardly extending flange portion whereby said flange portion overlies said lip portion when said members are closed together over said housing open top.
Claim 11
Dependent Claim
22 words
The lamp of claim 1 wherein said housing is about U-shaped in cross-section and includes a plate across the back end thereof.
Claim 12
Dependent Claim
20 words
The lamp of claim 3 wherein said member closest said bulb comprises said heat sink and is constructed of metal.
Claim 13
Dependent Claim
18 words
The lamp of claim 10 wherein said housing includes handle means attached thereto for manually manipulating said lamp.
References Cited (Backward Citations)
US3126785A
Cited
US3140053A
Cited
US3461282A
Cited
US3541492A
Cited
US3639751A
Cited
US3689761A
Cited
US3936686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-26 | 1991-04-27 | 1991-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-26 | 1995-04-27 | 1995-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-26 | 1999-04-27 | 1999-10-27 | $7700.00 | Window Closed / Lapsed |