Patent US4088200A successfully refreshed from Google Patents.
US4088200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lifting apparatus
Assignee: John Laing and Son Ltd
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Filing: 1976-11-11
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Granted: 1978-05-09
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Expires: 1996-11-11
Abstract
Abstract A lifting apparatus, which is particularly suitable for mounting on a truck, includes a vertically extendable telescopic arm having outriggers which can be extended to the ground to provide support and a cage, supported on a second arm which extends from the upper end of the telescopic arm, the second arm being rotatable about the axis of the telescopic arm and pivotable with respect to the arm in a plane containing the said axis.
Inventors
- 👤 David Cowley
- 👤 Raymond J. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:40
CPC Classifications
B; B66; B66F; B66F11/00; B66F11/04; B66F11/044; B66F11/046
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
153 words
Lifting apparatus including a telescopically extending arm, a plurality of tubular members constituting the arm, a base, means to pivot the arm about the base, a plurality of telescopically extendable outrigger legs arranged to provide support to the apparatus and a second arm, means for rotatably attaching the second arm to the one of the tubular members remote from the base, a motor, the motor being coupled to the second arm in such a way that the second arm is rotatable continuously through 360° about the longitudinal axis of the said one of the tubular members and means for rotatably attaching the said second arm to the said one of the tubular members for rotation in a plane containing the said axis, wherein means for supplying power for the motor and for rotating the second arm in the plane containing the axis are arranged within the tubular members constituting the first mentioned arm.
Claim 2
Dependent Claim
153 words
Lifting apparatus including a telescopically extending arm, a plurality of tubular members constituting the arm, a base, means to pivot the arm about the base, a plurality of telescopically extendable outrigger legs arranged to provide support to the apparatus and a second arm, means for rotatably attaching the second arm to the one of the tubular members remote from the base, a motor, the motor being coupled to the second arm in such a way that the second arm is rotatable continuously through 360° about the longitudinal axis of the said one of the tubular members and means for rotatably attaching the said second arm to the said one of the tubular members for rotation in a plane containing the said axis, wherein means for supplying power for the motor and for rotating the second arm in the plane containing the axis are arranged within the tubular members constituting the first mentioned arm.
Claim 3
Dependent Claim
37 words
Apparatus as claimed in claim 1 including means for pivotally attaching the outrigger legs to a second one of the tubular members, the second one of the members being the one directly attached pivotally to the base.
Claim 4
Dependent Claim
29 words
Apparatus as claimed in claim 1 including a plate constituting the base, whereby the base can be attached to a vehicle, the vehicle also providing support for the apparatus.
Claim 5
Dependent Claim
26 words
Apparatus as claimed in claim 2 including a platform attached to the second arm at a point remote from the said one of the tubular members.
Claim 6
Dependent Claim
67 words
Apparatus as claimed in claim 1 including a pinion wheel attached to the first mentioned one of the tubular members and fixed relative thereto, a worm attached to the second arm and a motor arranged to rotate the worm, the worm and pinion co-operating to cause rotation of the second arm about the longitudinal axis of the first-mentioned arm in accordance with the rotation of the motor.
Claim 7
Dependent Claim
102 words
Apparatus as claimed in claim 1 including a source of hydraulic fluid, a plurality of piston and cylinders coupled to the said source, a plurality of electromagnetically operated valves arranged to control the flow of hydraulic fluid to respective ones of the cylinders and a plurality of push-buttons connected electrically to respective valves to control the operation of the valves, respective ones of the pistons and cylinders controlling the extension of the telescopic arm, the pivoting of the arm about the base, the extension of the outrigger legs and the rotation of the second arm in the plane containing the said axis.
References Cited (Backward Citations)
US1960355A
Cited
US3072215A
Cited
US2988163A
Cited
US3154199A
Cited
US3481409A
Cited
US3927732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |