US3709322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overhead service apparatus with swivel platform
Assignee: Individual
•
Filing: 1971-02-01
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Granted: 1973-01-09
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Expires: 1991-02-01
Abstract
Abstract Overhead service apparatus having a telescopically extensible inclined mast, mounted on a mobile base which is operable to swivel the mast about a mast-swivel axis, combined with a platform support on the mast and on which a platform is mounted for both traversing movement and swivel movement. The combined swivel and traverse platform movement at the top of an inclined telescopic mast provides unique versatility for positioning a work platform in elevated positions, parallel to the work surface or zones anywhere in an extensive reach space. Mast swivel movement is provided either by driving the mobile base itself about a central mast-swivel axis, or by mounting the mast on a turntable which swivels on the base.
Inventors
- 👤 M Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:16
CPC Classifications
B; B66; B66F; B66F11/00; B66F11/04; B64; B64F; B64F5/00; B64F5/10
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
100 words
Overhead service apparatus comprising, in combination, a mobile base, an upstanding telescopically extensible mast on said base, a platform support carried by said mast and having an operative position at the top of the mast and movable in such position to elevated position by extension of the mast, a platform carrier mounted for swivel movement on said platform support, on an axis offset from the mast, an elongated platform mounted for traversing movement on said carrier, and control means to extend and retract said mast, to swivel said carrier on said support, and to traverse said platform on said carrier.
Claim 2
Dependent Claim
100 words
Overhead service apparatus comprising, in combination, a mobile base, an upstanding telescopically extensible mast on said base, a platform support carried by said mast and having an operative position at the top of the mast and movable in such position to elevated position by extension of the mast, a platform carrier mounted for swivel movement on said platform support, on an axis offset from the mast, an elongated platform mounted for traversing movement on said carrier, and control means to extend and retract said mast, to swivel said carrier on said support, and to traverse said platform on said carrier.
Claim 3
Dependent Claim
37 words
Overhead service apparatus according to claim 1 in which said mast is inclined outward from the vertical to carry the swivel axis of the platform carrier outward of the mobile base as the mast is telescopically extended.
Claim 4
Dependent Claim
28 words
Overhead service apparatus according to claim 1 in which the mast is inclined outward and the platform support is disposed at the outer side of the inclined mast.
Claim 5
Dependent Claim
82 words
Overhead service apparatus according to claim 3, in which the platform has a retracted position in which the major portion of its length extends inward from the carrier on said platform support and overlies the upper end of the mast, the platform support is movable along the outer face of the mast when the mast is in collapsed condition, and the platform has a door in its floor which opens to permit the mast to project through the plane of the platform.
Claim 6
Dependent Claim
66 words
Overhead service apparatus according to claim 1 in which the platform support is disposed at the outer side of the mast, and the platform carrier can be swivelled to a transverse position in which the platform clears the mast, the platform support being movable along the outer face of the mast to position the platform below the top of the mast in a transverse work position.
Claim 7
Dependent Claim
47 words
Overhead service apparatus according to claim 1 in which the platform support in said operative position at the top of the mast disposes the platform in a position to clear the mast, and said swivel mounTing being operable to swivel the platform through 360* in either direction.
Claim 8
Dependent Claim
61 words
Overhead service apparatus according to claim 1 in which the swivel mounting for the platform carrier includes a plurality of slip rings mounted on one of the relatively swivelling parts and contacts for such slip rings mounted on the other of such parts, and electrical circuits for energizing said control means, said circuits including connections through said slip rings and contacts.
Claim 9
Dependent Claim
39 words
Overhead service apparatus according to claim 2 with the addition of means associated with said mobile base for swivelling the mast about a vertical axis on the opposite side of the mast from the swivel axis of the platform.
Claim 10
Dependent Claim
32 words
Overhead service apparatus according to claim 8 in which said mast swivelling means comprises means to drive the mobile base about a swivel axis disposed centrally within the periphery of the base.
Claim 11
Dependent Claim
29 words
Overhead service apparatus according to claim 8 in which the mast is mounted on a swivel carriage and such carriage is mounted for swivel movement on the mobile base.
Claim 12
Dependent Claim
95 words
Overhead service apparatus according to claim 10, in which said mobile base comprises a truck having a frame supported in elevated position above ground level, a swivel ring mounted on said frame about an opening through the frame, said swivel carriage being mounted on said swivel ring, and said mast being mounted on said carriage in position to extend through the opening in the frame, the mast being thereby extended downward through the plane of its swivel support to permit the use of longer mast sections and thereby increase the reach height of the mast.
Claim 13
Dependent Claim
136 words
Overhead service apparatus comprising, in combination, a mobile base in the form of a truck having ground wheels and a frame supported thereon in elevated position above said wheels, said frame defining a central opening, an upstanding telescopically extensible mast comprising a base mast section and extensible mast sections, means to mount said base mast section in a fixed position of inclination extending through said frame opening and upward and downward therefrom, said extensible mast sections being telescopically movable relative to said base mast section and through said opening, said mast mounting means comprising a swivel support carried by the frame and a swivel carriage on which the base mast section is mounted for movement therewith a mast swivel axis, and a work platform carried by said extensible mast and movable thereby to elevated work positions.
Claim 14
Dependent Claim
136 words
Overhead service apparatus comprising, in combination, a mobile base in the form of a truck having ground wheels and a frame supported thereon in elevated position above said wheels, said frame defining a central opening, an upstanding telescopically extensible mast comprising a base mast section and extensible mast sections, means to mount said base mast section in a fixed position of inclination extending through said frame opening and upward and downward therefrom, said extensible mast sections being telescopically movable relative to said base mast section and through said opening, said mast mounting means comprising a swivel support carried by the frame and a swivel carriage on which the base mast section is mounted for movement therewith a mast swivel axis, and a work platform carried by said extensible mast and movable thereby to elevated work positions.
Claim 15
Dependent Claim
39 words
Overhead service apparatus according to claim 12 in which said swivel support comprises a swivel bearing ring mounted on said frame about said opening, and said carriage comprises a swivel ring mounted for swivel movement on said bearing ring.
Claim 16
Dependent Claim
44 words
Overhead service apparatus according to claim 12 with the addition that said mast carries a platform support projecting outward from one face of the mast, a platform carriage swivelled on said support for rotation about a vertical axis displaced from the mast swivel axis.
Claim 17
Dependent Claim
22 words
Overhead service apparatus according to claim 14 with the addition that the platform is mounted for traversing movement on said platform carriage.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |