Patent US4737892A successfully refreshed from Google Patents.
US4737892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch arrangements in portable flashlights
Assignee: SHIZUSHIN LEASING COMPANY A CORP OF JAPAN
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Filing: 1986-07-15
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Granted: 1988-04-12
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Expires: 2006-07-15
Abstract
Abstract A portable flashlight including a body having therein a dry cell assembly and a dry cell holder frame and having on its front face a light source unit, wherein the body is provided on the bottom face with a first contact plate coming into contact with a first dry cell and a second contact plate coming into contact with a second dry cell, one of said contact plates being integrally provided with a projecting contact piece, which has its contact end extended above the other contact plate, and an axially turnable keep member is attached on the contact piece, said keep member being turned at a given angle, whereby the contact piece is forced down into contact with the other contact plate.
Inventors
- 👤 Keiichi Ohashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:11
CPC Classifications
F; F21; F21V; F21V23/00; F21V23/04; F21V23/0414; F21V23/0421; F21L; F21L2/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A portable flashlight, comprising a body containing at least two dry cells, a light source unit attached to a first end of the body, and first and second contact plates disposed in a second end of the body, said first contact plate being in contact with a first dry cell, said second contact plate being in contact with a second dry cell and having a projecting contact piece which extends above the first contact plate, said portable flashlight further comprising an end cap rotatably fitted to said second end, said cap having a keeper integrally attached thereto and projecting from, wherein when said cap is rotated, the keeper presses the projecting contact piece against the first contact plate.
Claim 2
Dependent Claim
118 words
A portable flashlight, comprising a body containing at least two dry cells, a light source unit attached to a first end of the body, and first and second contact plates disposed in a second end of the body, said first contact plate being in contact with a first dry cell, said second contact plate being in contact with a second dry cell and having a projecting contact piece which extends above the first contact plate, said portable flashlight further comprising an end cap rotatably fitted to said second end, said cap having a keeper integrally attached thereto and projecting from, wherein when said cap is rotated, the keeper presses the projecting contact piece against the first contact plate.
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) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |