Patent US4388674A successfully refreshed from Google Patents.
US4388674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable electric flashlight
Assignee: Maxell Ltd
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Filing: 1981-03-31
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Granted: 1983-06-14
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Expires: 2001-03-31
Abstract
Abstract An improved portable electric flashlight capable of changing over state of light projections continuously between a forward projection and a diffused peripheral projection, which is simple in construction and stable in functioning, and is also applicable to a variety of end uses, for example, as a normal flashlight to be carried about with hands, a lantern to be placed on desks or floors or hung from ceilings, etc.
Inventors
- 👤 Tadao Sano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:54
CPC Classifications
F; F21; F21V; F21V23/00; F21V23/04; F21S; F21S9/00; F21S9/02; F21V15/00; F21V15/02; F21V19/00; F21V19/04; F21V19/047; F21V21/00; F21V21/40; F21V3/00; F21V3/04; F21V3/049
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
167 words
A portable electric flashlight which comprises a battery case open at one side face for accomodating at least one electric battery therein, a hood receiving member releasably mounted on the battery case for covering the open side face of said battery case, a battery depressing plate for mounting an electric bulb to be illuminated by the at least one battery accommodated in said battery case and electrically conductive means for establishing an electrical connection between the at least one battery and said electric bulb, the battery depressing plate being held in position between said battery case and said hood receiving member, and a light transmitting hood member having a front light transmitting portion and a diffused light transmitting portion at a predetermined peripheral surface portion thereof, and means for mounting the light transmitting hood member so as to enable vertical movement thereof with respect to said hood receiving member whereby light may be selectively projected through the front light transmitting portion and the diffused light transmitting portion.
Claim 2
Dependent Claim
167 words
A portable electric flashlight which comprises a battery case open at one side face for accomodating at least one electric battery therein, a hood receiving member releasably mounted on the battery case for covering the open side face of said battery case, a battery depressing plate for mounting an electric bulb to be illuminated by the at least one battery accommodated in said battery case and electrically conductive means for establishing an electrical connection between the at least one battery and said electric bulb, the battery depressing plate being held in position between said battery case and said hood receiving member, and a light transmitting hood member having a front light transmitting portion and a diffused light transmitting portion at a predetermined peripheral surface portion thereof, and means for mounting the light transmitting hood member so as to enable vertical movement thereof with respect to said hood receiving member whereby light may be selectively projected through the front light transmitting portion and the diffused light transmitting portion.
Claim 3
Dependent Claim
39 words
A portable electric flashlight as claimed in claim 1, wherein said hood receiving member is provided with a grip portion to be held with a hand and for enabling a hanging of said portable electric flashlight during use thereof.
Claim 4
Dependent Claim
27 words
A portable electric flashlight as claimed in claim 2, wherein said grip portion extends in a direction of the vertical movement of said light transmitting hood member.
Claim 5
Dependent Claim
68 words
A portable electric flashlight as claimed in claim 2, wherein said grip portion is integrally formed with said hood receiving member so as to extend outwardly from said hood receiving member, and wherein a junction between said hood receiving member and said grip portion is set on a vertical line passing through a center of gravity of said portable electric flashlight containing the at least one battery therein.
Claim 6
Dependent Claim
30 words
A portable electric flashlight as claimed in claim 1, wherein said battery depressing plate includes a peripheral wall depending from a peripheral edge thereof for surrounding said electrically conductive means.
Claim 7
Dependent Claim
90 words
A portable electric flashlight as claimed in claim 1, wherein said hood receiving member is cylindrical and includes guide means arranged at confronting positions on a side wall of said hood receiving member for guiding the vertical movement of said light transmitting hood member, stopper means in contact with an inner surface of said light transmitting hood member for restricting lateral swaying of said hood member, said stopper means being provided in positions intersecting at right angles with said guide means on an upper surface of said hood receiving member.
Claim 8
Dependent Claim
34 words
A portable electric flashlight as claimed in claim 6, wherein means are provided on an inner surface of said light transmitting hood member for holding said light transmitting hood member in a raised position.
Claim 9
Dependent Claim
147 words
A portable electric flashlight which comprises a battery case open at its one side face for accommodating electric batteries therein, a hood receiving member releasably mounted on the battery caee for covering the open side face of said battery case, a battery depressing plate which has an electric blub to be illuminated by the batteries accommodated in said battery case and electrically conductive pieces for electrical connection between the batteries and said electric bulb, and which is held in position between said battery case and said hood receiving member, and a light transmitting hood member having a reflecting mirror fixedly provided at its inner forward portion for simultaneous movement with said light transmitting hood member and a diffused light transmitting portion at a predetermined peripheral portion thereof said light transmitting hood member being movably mounted for continuous vertical movement thereof, with respect to said hood receiving member.
Claim 10
Dependent Claim
147 words
A portable electric flashlight which comprises a battery case open at its one side face for accommodating electric batteries therein, a hood receiving member releasably mounted on the battery caee for covering the open side face of said battery case, a battery depressing plate which has an electric blub to be illuminated by the batteries accommodated in said battery case and electrically conductive pieces for electrical connection between the batteries and said electric bulb, and which is held in position between said battery case and said hood receiving member, and a light transmitting hood member having a reflecting mirror fixedly provided at its inner forward portion for simultaneous movement with said light transmitting hood member and a diffused light transmitting portion at a predetermined peripheral portion thereof said light transmitting hood member being movably mounted for continuous vertical movement thereof, with respect to said hood receiving member.
Claim 11
Dependent Claim
18 words
A portable electric flashlight as claimed in claim 6, wherein said stopper means are formed as plate members.
Claim 12
Dependent Claim
41 words
A portable electric flashlight as claimed in claim 7, wherein said means for holding includes restricting ribs adapted to be brought into contact with free ends of the stopper means when the light transmitting hood member is in the raised position.
Claim 13
Dependent Claim
92 words
A portable electric flashlight as claimed in claim 1, wherein said electrically conductive means includes a switch means having resilient switching members mounted on the battery depressing plate and being adapted to open and close the electrical connection between the at least one battery and the electric bulb, the battery depressing plate includes an outwardly projecting side portion along a peripheral portion thereof for accommodating the resilient switching members, and wherein the electrically conductive means further includes an electrically conductive strip means interposed between said resilient switching members and the electric bulb.
Claim 14
Dependent Claim
69 words
A portable electric flashlight as claimed in claim 11, wherein the battery case includes a frame portion for accommodating said switch means, the switch means includes a switch button provided with means for selectively bringing the switching members into and out of electrical contact, and wherein means are provided on said frame portion and said switch button for enabling a mounting of said switch button for a rocking movement.
Claim 15
Dependent Claim
68 words
A portable electric flashlight as claimed in one of claims 11 or 12, wherein a grip portion is formed on said hood receiving member so as to extend outwardly therefrom, and wherein a junction between said hood receiving member and said grip portion is disposed on a vertical line passing through a center of gravity of the portable electric flashlight having the at least one battery contained therein.
Claim 16
Dependent Claim
34 words
A portable electric flashlight as claimed in claim 13, wherein means are provided on an inner surface of the light transmitting hood member for holding said light transmitting hood member in a raised position.
References Cited (Backward Citations)
US4257085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |