Patent US3817401A successfully refreshed from Google Patents.
US3817401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-propelled dual-jack hoist
Assignee: Individual
•
Filing: 1972-08-07
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Granted: 1974-06-18
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Expires: 1992-08-07
Abstract
Abstract A self-propelled, steerable hoist in the nature of a low-bed vehicle especially designed, but not limited, for use to liftfrom beneath and at selected points-a mobile home during the course of placement of said mobile home on blocks at a semipermanent location. The hoist includes a low-level but normally aboveground, elongated bed-frame adapted to be run under the mobile home and then lowered into engagement with the ground for use of the hoist, and a plurality of hydraulic jacks on the bedframe of the mobile home to lift the latter for the purpose described. The jacks are mounted on a powered reversible slide carried by the bed-frame so that the mobile home, as lifted by the jacks, is then positionally adjustable by the slide in the direction of movement thereof.
Inventors
- 👤 C Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:05
CPC Classifications
B; B66; B66F; B66F5/00; B66F5/04; B66F3/00; B66F3/24
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
100 words
A self-propelled hoist comprising a tractor, an elongated, low-level but normally aboveground bed-frame secured in connection with and projecting forwardly from the tractor, a plurality of power-actuated jacks supported by the bed-frame in longitudinally spaced relation thereon, vertically poweradjustable wheels mounted in connection with the front end of the frame, and means coupling the rear end of the frame in vertically power-adjustable relation to the tractor; the tractor including a steerable drive wheel, there being a motor on the tractor connected in driving relation to said wheel, and another motor on the tractor connected in steering relation to such wheel.
Claim 2
Dependent Claim
100 words
A self-propelled hoist comprising a tractor, an elongated, low-level but normally aboveground bed-frame secured in connection with and projecting forwardly from the tractor, a plurality of power-actuated jacks supported by the bed-frame in longitudinally spaced relation thereon, vertically poweradjustable wheels mounted in connection with the front end of the frame, and means coupling the rear end of the frame in vertically power-adjustable relation to the tractor; the tractor including a steerable drive wheel, there being a motor on the tractor connected in driving relation to said wheel, and another motor on the tractor connected in steering relation to such wheel.
Claim 3
Dependent Claim
92 words
A self-propelled hoist comprising a tractor, an elongated, low-level but normally aboveground bed-frame secured in connection with and projecting forwardly from the tractor, and a plurality of power-actuated jacks supported by the bed-frame in longitudinally spaced relation thereon; the tractor including a single drive wheel, a post on which such drive wheel is journaled, and a sleeve in which the post is turnable; there being outrigger arms projecting laterally from opposite sides of the sleeve, and ground-engaging wheels journaled on the outer ends of such arms in stabilizing relation to the tractor.
Claim 4
Dependent Claim
92 words
A self-propelled hoist comprising a tractor, an elongated, low-level but normally aboveground bed-frame secured in connection with and projecting forwardly from the tractor, and a plurality of power-actuated jacks supported by the bed-frame in longitudinally spaced relation thereon; the tractor including a single drive wheel, a post on which such drive wheel is journaled, and a sleeve in which the post is turnable; there being outrigger arms projecting laterally from opposite sides of the sleeve, and ground-engaging wheels journaled on the outer ends of such arms in stabilizing relation to the tractor.
Claim 5
Dependent Claim
24 words
A hoist, as in claim 2, including a bar fixed on and projecting rearwardly from the sleeve, and aN operator''s seat on such bar.
Claim 6
Dependent Claim
101 words
A self-propelled hoist comprising a tractor, an elongated, low-level but normally aboveground bed-frame secured in connection with and projecting forwardly from the tractor, a plurality of power-actuated jacks supported by the bed-frame in longitudinally spaced relation thereon, and a power-actuated slide on the bed-frame reversibly movable in a direction lengthwise of the latter; the jacks being secured on the slide, the bed-frame being a shallow, upwardly opening channel beam, and the slide being a plate matingly seating in such beam; there being means to prevent upward escape of the slide from said beam without restricting said lengthwise movement of the slide.
Claim 7
Dependent Claim
101 words
A self-propelled hoist comprising a tractor, an elongated, low-level but normally aboveground bed-frame secured in connection with and projecting forwardly from the tractor, a plurality of power-actuated jacks supported by the bed-frame in longitudinally spaced relation thereon, and a power-actuated slide on the bed-frame reversibly movable in a direction lengthwise of the latter; the jacks being secured on the slide, the bed-frame being a shallow, upwardly opening channel beam, and the slide being a plate matingly seating in such beam; there being means to prevent upward escape of the slide from said beam without restricting said lengthwise movement of the slide.
Claim 8
Dependent Claim
122 words
A self-propelled hoist comprising a tractor, an elongated, low-level but normally aboveground bed-frame secured in connection with and projecting forwardly from the tractor, a plurality of power-actuated jacks supported by the bed-frame in longitudinally spaced relation thereon, a power-actuated slide on the bed-frame reversibly movable in a direction lengthwise of the latter; the jacks being secured on the slide, a longitudinal power cylinder disposed adjacent but above the slide, means connecting one end of said power cylinder to the slide, and means connecting the other end of such power cylinder to the bed-frame; said last named means including an upstanding bracket fixed to the bed-frame intermediate the sides thereof, the slide having a longitudinal slot therein and through which the bracket extends.
Claim 9
Dependent Claim
122 words
A self-propelled hoist comprising a tractor, an elongated, low-level but normally aboveground bed-frame secured in connection with and projecting forwardly from the tractor, a plurality of power-actuated jacks supported by the bed-frame in longitudinally spaced relation thereon, a power-actuated slide on the bed-frame reversibly movable in a direction lengthwise of the latter; the jacks being secured on the slide, a longitudinal power cylinder disposed adjacent but above the slide, means connecting one end of said power cylinder to the slide, and means connecting the other end of such power cylinder to the bed-frame; said last named means including an upstanding bracket fixed to the bed-frame intermediate the sides thereof, the slide having a longitudinal slot therein and through which the bracket extends.
Claim 10
Dependent Claim
136 words
A self-propelled hoist comprising a tractor, an elongated low-level but normally aboveground frame projecting forwardly from the tractor, a plurality of power-actuated jacks supported by the bed-frame in longitudinally spaced relation thereon, transversely spaced front wheels, means mounting the wheels in connection with the front end of the frame in vertically adjustable relation, power means to so adjust the front wheels in a direction to lower said front end of the frame to the ground, means coupling the rear of the frame to the tractor in vertically adjustable relation, power means to so adjust the rear of the frame in a direction to lower the same to the ground, a slide reversibly movably mounted on the frame for travel longitudinally thereon, and power means to so move the slide; the jacks being mounted on the latter.
Claim 11
Dependent Claim
136 words
A self-propelled hoist comprising a tractor, an elongated low-level but normally aboveground frame projecting forwardly from the tractor, a plurality of power-actuated jacks supported by the bed-frame in longitudinally spaced relation thereon, transversely spaced front wheels, means mounting the wheels in connection with the front end of the frame in vertically adjustable relation, power means to so adjust the front wheels in a direction to lower said front end of the frame to the ground, means coupling the rear of the frame to the tractor in vertically adjustable relation, power means to so adjust the rear of the frame in a direction to lower the same to the ground, a slide reversibly movably mounted on the frame for travel longitudinally thereon, and power means to so move the slide; the jacks being mounted on the latter.
Claim 12
Dependent Claim
60 words
A hoist, as in claim 6, in which the wheel-mounting means includes longitudinal, transversely spaced, bellcrank levers disposed in parallel and pivoted intermediate their ends on the frame, the wheels being journaled on one end of said levers, and the wheel-adjusting power means being connected between the frame and the other end of the levers in common to the latter.
Claim 13
Dependent Claim
64 words
A hoist, as in claim 6, in which the means to adjust the front wheels, the means to adjust the rear of the bed-frame, and the means to move the slide, each include a separate hydraulic power cylinder; the tractor including an operator''s seat, and manual control valves corresponding to such power cylinders, the valves being within reach of an operator on such seat.
Claim 14
Dependent Claim
72 words
A hoist, as in claim 6, in which the tractor includes a post, a sleeve in which the post is turnable, a single drive wheel journaled in connection with the post beneath the sleeve, a driving motor connected to said drive wheel, a steering motor connected to the post, arms fixed on and extending laterally from opposite sides of the sleeve, and ground-engaging wheels journaled on the outer ends of such arms.
Claim 15
Dependent Claim
93 words
A self-propelled hoist comprising a tractor, an elongated, low-level but normally aboveground bed-frame projecting forwardly from the tractor, a plurality of power-actuated jacks supported by the bed-frame in longitudinally spaced relation thereon, vertically power-adjustable ground-engaging wheels mounted in connection with the front end of the frame, and means attaching the rear end of the frame to the tractor; such attaching means providing the support for the rear end of the frame and seCuring said rear end to the tractor in normally fixed but vertically power-adjustable relation, and the tractor including steerable wheel means.
Claim 16
Dependent Claim
93 words
A self-propelled hoist comprising a tractor, an elongated, low-level but normally aboveground bed-frame projecting forwardly from the tractor, a plurality of power-actuated jacks supported by the bed-frame in longitudinally spaced relation thereon, vertically power-adjustable ground-engaging wheels mounted in connection with the front end of the frame, and means attaching the rear end of the frame to the tractor; such attaching means providing the support for the rear end of the frame and seCuring said rear end to the tractor in normally fixed but vertically power-adjustable relation, and the tractor including steerable wheel means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |