US3586270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple stage extensible boom
Assignee: Electro Motion Pacific Inc
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Filing: 1968-11-12
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Granted: 1971-06-22
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Expires: 1988-11-12
Abstract
Abstract An extensible boom for portable lights has a two-part base. One part of the base is fixed to a trailer or other vehicle and the other part is rotatable with respect thereto about a vertical axis. Hinged to the rotatable part about a horizontal axis is a telescopic multisection boom. A first winch elevates the boom from horizontal to vertical position. A second winch controls a cable system located inside the boom sections to elevate the boom. A manually extensible top boom section may be used to increase the maximum height.
Inventors
- 👤 Erich W Loffler
- 👤 Hans Kruger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:55
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/14; F21V21/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
144 words
An extensible boom for portable lights comprising a vehicle, a first base section mounted on said vehicle, a second base section, means mounting said base sections together for rotation of said second base section relative to said first base section about a vertical axis through substantially 360*, a hollow first boom section, means mounting said first boom section on said second base section for pivotal movement between a horizontal collapsed position and a vertical erect position, first winch means on said second base section for moving said first boom section between collapsed and erect positions, a second boom section telescopically movable within said first boom section between retracted and extended positions, second winch means on said first boom section for moving said second boom section between retracted and extended positions, and lights mounted on the outer end of the outermost of said boom sections.
Claim 2
Dependent Claim
144 words
An extensible boom for portable lights comprising a vehicle, a first base section mounted on said vehicle, a second base section, means mounting said base sections together for rotation of said second base section relative to said first base section about a vertical axis through substantially 360*, a hollow first boom section, means mounting said first boom section on said second base section for pivotal movement between a horizontal collapsed position and a vertical erect position, first winch means on said second base section for moving said first boom section between collapsed and erect positions, a second boom section telescopically movable within said first boom section between retracted and extended positions, second winch means on said first boom section for moving said second boom section between retracted and extended positions, and lights mounted on the outer end of the outermost of said boom sections.
Claim 3
Dependent Claim
62 words
An extensible boom according to claim 1 in which said second winch is provided with a cable, said cable reeved extending from said second winch up inside said first boom section around a pulley fixed to the inside of the outer end of said first boom section and thence back to an anchor on the lower end of said second boom section.
Claim 4
Dependent Claim
70 words
An extensible Boom according to claim 2 which further comprises a third boom section telescopically movable within said second boom section, a second cable fixed to said first boom section, a second pulley fixed to the inside of the outer end of said second boom section, said second cable running around said second pulley and thence back to a second anchor on the lower end of said third boom section.
Claim 5
Dependent Claim
68 words
An extensible boom according to claim 3 which further comprises a fourth boom section on which said lights are mounted, said fourth boom section being telescopically movable in said third boom section and manually movable between retracted and extended positions, latch means securing said fourth boom relative to said third boom, and each of said boom sections having noncircular tubular members which are nonrotatable relative to each other.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |