US4068827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable hoist
Assignee: Individual
•
Filing: 1976-06-29
•
Granted: 1978-01-17
•
Expires: 1996-06-29
Abstract
Abstract A portable hoist consisting essentially of three major components readily assembled and disassembled at the job site in a relatively short period of time to facilitate portability. The three basic components include a generally horizontally disposed main frame, an elongated upright mounted at one end of the main frame and a generally horizontally extending boom at the upper end of the upright with the boom and main frame extending from opposite sides of the upright and from the upper and lower ends respectively. The main frame includes structure enabling it to be supported by wheeled units, structure to enable an end portion of the frame remote from the upright to be anchored to a supporting deck or platform such as a truck or similar vehicle, a building floor or other support and an area receiving a counterweight at a point remote from the upright. The portable hoist has particular utility in lifting preassembled house panels or sections into place by being supported from the interior house deck without need for exterior landscaping or back-filling prior to wall erection. When used on multistory buildings, the portable hoist can simply be moved to upper floors as they are completed.
Inventors
- 👤 Larry J. Fanning
- 👤 Dwight L. Duimstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:42
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/18; B66C23/36; B66C23/48
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
296 words
A portable hoist comprising a generally elongated, rectangular, horizontally disposed frame having a substantially planar bottom surface, an elongated upright mounted on one end of said frame and extending upwardly therefrom, an elongated boom mounted at the upper end of the upright and extending generally horizontally, said boom and said frame extending in opposite directions from the upright, winch means mounted on said hoist and including a lift cable entrained over a pulley at the outer end of the boom, means on the free end of the lift cable for engaging a load, said upright being detachably connected to said frame by removable pin means, and removable pin means connecting the boom to the upper end of the upright, said winch means including a winch drum and motor mounted on the upright adjacent the lower end thereof, a pulley mounted on the upper end of the upright in alignment with the winch drum for receiving the lifting cable with the lifting cable being wound on said winch drum, a wheeled unit mounted in underlying relation to each end of the frame to enable the frame to be moved from one location to another, one of said wheeled units being steerable for guiding movement of the hoist, the wheeled unit adjacent the end of the frame to which the upright is connected including a rigid axle journaling more than two wheels along a single axis and lying in parallel planes, upstanding support pins rigid with the axle and terminating in upper ends extending above a horizontal member rigidly spaced above said axle, said frame including a pair of vertical sleeves rigidly mounted in the corners of said frame at one end thereof and telescopically and detachably receiving the pins for mounting the wheeled unit below the frame.
Claim 2
Dependent Claim
296 words
A portable hoist comprising a generally elongated, rectangular, horizontally disposed frame having a substantially planar bottom surface, an elongated upright mounted on one end of said frame and extending upwardly therefrom, an elongated boom mounted at the upper end of the upright and extending generally horizontally, said boom and said frame extending in opposite directions from the upright, winch means mounted on said hoist and including a lift cable entrained over a pulley at the outer end of the boom, means on the free end of the lift cable for engaging a load, said upright being detachably connected to said frame by removable pin means, and removable pin means connecting the boom to the upper end of the upright, said winch means including a winch drum and motor mounted on the upright adjacent the lower end thereof, a pulley mounted on the upper end of the upright in alignment with the winch drum for receiving the lifting cable with the lifting cable being wound on said winch drum, a wheeled unit mounted in underlying relation to each end of the frame to enable the frame to be moved from one location to another, one of said wheeled units being steerable for guiding movement of the hoist, the wheeled unit adjacent the end of the frame to which the upright is connected including a rigid axle journaling more than two wheels along a single axis and lying in parallel planes, upstanding support pins rigid with the axle and terminating in upper ends extending above a horizontal member rigidly spaced above said axle, said frame including a pair of vertical sleeves rigidly mounted in the corners of said frame at one end thereof and telescopically and detachably receiving the pins for mounting the wheeled unit below the frame.
Claim 3
Dependent Claim
130 words
The structure as defined in claim 1 wherein the other wheeled unit is located adjacent the opposite end of the frame and includes a rigid axle with at least one wheel journaled therefrom, said axle including a turntable and upstanding pin, said turntable being in the form of a plate disposed below the upper end of the pin, said frame including a centrally located vertical sleeve adjacent the end of the frame remote from the upright receiving said pin with the sleeve including a bottom plate journaled against the turntable plate to enable the axle to pivot about a vertical axis, and a tongue member connected with the axle to enable steering control of the frame and to enable the frame to be pushed or pulled to a desired location.
Claim 4
Dependent Claim
36 words
The structure as defined in claim 2 wherein the end of the frame remote from the upright includes a horizontally disposed surface receiving counterweight means to prevent the hoist from tilting when a load is lifted.
Claim 5
Dependent Claim
170 words
The structure as defined in claim 3 wherein said frame, upright and boom are of truss construction with one end of the frame including a pair of laterally spaced upstanding plates receiving the lower end of the upright therebetween, the lower end of the upright including laterally and longitudinally spaced members interconnected by a pair of transverse sleeves, and a pair of pins extending through the plates and sleeves on the lower end of the upright with the pins being horizontally disposed and longitudinally spaced in relation to each other along the length of the frame, said boom tapering outwardly from the upright, said upright including a pair of laterally spaced plates at the upper end thereof receiving the upper corner portion of the end of the boom therebetween with a removable pin extending through the plates and upper corner portion of the boom for detachably connecting the boom to the upright, the lower corner of the boom freely resting against the surface of the upright for stabilizing the boom.
Claim 6
Dependent Claim
109 words
The structure as defined in claim 4 wherein said frame includes a winch means mounted thereon in remote spaced relation to the upright for facilitating the assembly of the upright and boom to the frame to enable transport of the hoist in a knocked down condition and subsequent assembly at the job site, and a cable extending from the upper end of the upright to the winch means on the frame and defining the hypotenuse of a right triangle in which the legs thereof are generally equal in length and defined by the upright and frame to transmit forces from the upper end of the upright to the frame.
Claim 7
Dependent Claim
241 words
A portable hoist comprising a generally elongated, rectangular, horizontally disposed frame having a substantially planar bottom surface, an elongated upright mounted on one end of said frame and extending upwardly therefrom, an elongated boom mounted at the upper end of the upright and extending generally horizontally, said boom and said frame extending in opposite directions from the upright, winch means mounted on said hoist and including a lift cable entrained over a pulley at the outer end of the boom, means on the free end of the lift cable for engaging a load, said upright being detachably connected to said frame by removable pin means, and removable pin means connecting the boom to the upper end of the upright, said frame including a centrally disposed sleeve at the end of the frame remote from the upright with the sleeve being rigid on the frame, anchoring means for engagement with the sleeve for anchoring the frame against a generally planar supporting surface, said anchoring means including an upstanding pin telescopically received in the sleeve and including a transverse aperture in the upper end thereof adapted to receive a retaining fastener, flat plate means on the lower end of the pin to be fastened to a truck load bed or other supporting surface in order to secure the pin to a truck load bed or other supporting surface for anchoring the frame to prevent tilting of the hoist when a load is lifted.
Claim 8
Dependent Claim
241 words
A portable hoist comprising a generally elongated, rectangular, horizontally disposed frame having a substantially planar bottom surface, an elongated upright mounted on one end of said frame and extending upwardly therefrom, an elongated boom mounted at the upper end of the upright and extending generally horizontally, said boom and said frame extending in opposite directions from the upright, winch means mounted on said hoist and including a lift cable entrained over a pulley at the outer end of the boom, means on the free end of the lift cable for engaging a load, said upright being detachably connected to said frame by removable pin means, and removable pin means connecting the boom to the upper end of the upright, said frame including a centrally disposed sleeve at the end of the frame remote from the upright with the sleeve being rigid on the frame, anchoring means for engagement with the sleeve for anchoring the frame against a generally planar supporting surface, said anchoring means including an upstanding pin telescopically received in the sleeve and including a transverse aperture in the upper end thereof adapted to receive a retaining fastener, flat plate means on the lower end of the pin to be fastened to a truck load bed or other supporting surface in order to secure the pin to a truck load bed or other supporting surface for anchoring the frame to prevent tilting of the hoist when a load is lifted.
References Cited (Backward Citations)
US2378605A
Cited
US2320620A
Cited
US2822931A
Cited
US3433459A
Cited
US3458073A
Cited
US3612566A
Cited
US3716217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |