US Patent No: 4,986,719
Number of patents in Portfolio can not be more than 2000
Roll-off hoist for variable positioning of containers
Stats
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Jan 22, 1991
Issued date -
Apr 20, 1990
filing date -
07/512,128
serial no -
Expired
status
Importance
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Abstract
A vehicle mounted roll-off hoist having a main hoist frame pivotally mounted at its rearward end to a vehicle such as a semi-trailer or truck, and including a pair of hydraulic lift actuators adapted to move the main hoist frame between a horizontal position and a rearwardly inclined position. A hydraulic actuator apparatus is provided for pulling a container onto the main frame of the hoist or setting off the container from the hoist. An extensible and retractable stop carriage is slidably connected to the forward end portion of the hoist main frame. Hydraulic actuator and locking elements are associated with the stop carriage for placing the container in the optimum position for transport on the vehicle. The hoist is capable of handling containers of both the outside rail and the inside rail type.
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First Claim
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International Classification(s)
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- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,225,280 Trailer for transporting and launching floating box caissons | 9 | 1978 | |
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| 4,455,118 Opposed cylinder cable hoist mechanism | 20 | 1981 | |
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| 4,630,991 Truck having tiltable front and rear frames | 16 | 1985 | |
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| 4,702,662 Trailer | 33 | 1985 | |
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| 4,580,805 Extendable container chassis for trucks | 29 | 1984 | |
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| 4,529,349 Roll-off hoist | 23 | 1983 | |
| 4,645,405 Roll-off container handling mechanism | 25 | 1985 | |
| 4,704,063 Container loading and unloading apparatus | 12 | 1986 | |