Traversing hoists – Having means facilitating assembly or disassembly – Of traversing hoist from support
Patent
1983-01-18
1985-04-02
Blix, Trygve M.
Traversing hoists
Having means facilitating assembly or disassembly
Of traversing hoist from support
212189, 212199, 212203, 212231, 212232, 212238, 212239, 212244, 212264, 212265, 254 8B, 254124, 414543, B66C 2326, B60P 100, B65G 708
Patent
active
045082332
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention pertains to the field of cranes and especially to portable cranes incorporating features that allow the crane to be mounted to a base assembly for use in vehicle repair shops or mounted to the bed of a pickup truck for use at remote locations. The invention is particularly adaptable for use in vehicle repair shops for removing and/or installing automotive engines located in engine compartments with limited space.
BACKGROUND ART
The problems encountered by mechanics in removing and/or installing engines and transmissions from vehicles has caused the loss of a considerable amount of time. The removal and installation of engines from vans and buses is a particularly difficult and time consuming task due to the limited space available in the engine compartment. To facilitate the removable or installation of a van engine a lifting boom angle that remains constant as the boom is raised is a highly desirable feature. A search of the prior-art did not disclose any patents or publications that disclosed cranes providing such a constant lifting boom angle or the additional portability and storage features available with the instant invention. However, the following U.S. patents were determined to be related:
______________________________________ U.S. PAT. NO. INVENTOR ISSUED
______________________________________
4,021,017 Adams 3 May 1977
3,059,785 Buckeye 23 October 1962
2,528,329 Bauer 31 October 1950
2,517,813 Wallace 8 August 1950
______________________________________
The Adams patent discloses a jack for removing such items as large truck gear boxes. The jack is provided with a bifurcated low level frame on which is mounted a vertical structure having a pivoted horizontal boom powered by a hydraulic cylinder.
The Buckeye patent discloses a standard type crane or jack suitable for use in vehicle repair shops for removing motors/engines and transmissions.
The Bauer patent discloses an apparatus for removing engines from an automobile and especially such engines as are used in large buses.
The Wallace patent discloses a portable lifting hydraulic hoist such as are frequently used on loading platforms or the back ends of delivery trucks and the like. The hoist is designed to be lifted by the operator from one base to another.
DISCLOSURE OF THE INVENTION
The Compact Heavy Duty Lifting Crane (CHDLC) is designed to be manually operated by one person and is primarily used for removing and/or installing heavy objects such as engines and transmissions from vehicles. The CHDLC consists of two major assembles: a floor base assembly and a portable lifting crane. An additional mounting plate that is permanently mounted to the bed of a pick-up truck is also disclosed.
The CHDLC has two principal objectives: one is to incorporate portability features that allow the CHDLC to be quickly and easily converted from a vehicle repair shop crane to a truck mounted crane. When used in the shop the portable lifting crane is mounted to the floor base assembly and when used on a truck it is mounted to the truck bed mounting plate.
The second principal objective is to provide a crane that allows the boom lift angle to either remain constant or to increase as the telescoping pylon is raised. The constant angle is particularly important since this feature facilitates the removal and installation of engines located in limited space engine compartments.
Another objective of the invention is to provide a CHDLC that can be quickly and easily converted to a storage configuration that allows the CHDLC to be stored in a horizontal area of approximately four square feet.
A further objective is to provide a CHDLC that can be used speedily and with precision by even inexperienced operators.
Another objective is to have a CHDLC that is rugged in structure and which employs a minimum number of parts such that it is relatively inexpensive to manufacture.
A further objective is to have a CHDLC that is reliable and easily maintainable.
BRIEF DESCRIPTION OF DRAWINGS
The details of the inventi
REFERENCES:
patent: 2554900 (1951-05-01), Davies
patent: 2605002 (1952-07-01), Groves
patent: 2610743 (1952-09-01), English et al.
patent: 2924428 (1960-02-01), Whittall et al.
patent: 3275296 (1966-09-01), Meyer
patent: 3521860 (1970-07-01), Zehrung, Jr. et al.
patent: 4021017 (1977-05-01), Adams
patent: 4090625 (1978-05-01), Walters
Blix Trygve M.
Cota Albert O.
Johnson R. B.
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