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Class Information
Number: 212/257
Name: Traversing hoists > Having vertically swinging boom > And trolley
Description: Apparatus wherein the vertically swinging boom* serves as or bears a separate track or guide on which a load-supporting trolley* is adapted to move.

Patents under this class:

Patent Number Title Of Patent Date Issued
6286695 Engine lifting and positioning assembly Sep. 11, 2001
6000562 Powered lifting apparatus using multiple booms Dec. 14, 1999
5322404 Wall lifting device Jun. 21, 1994
5188247 Lifting apparatus Feb. 23, 1993
5052566 Engine hoist and support apparatus Oct. 1, 1991
4930970 Collapsible hoist for a truck bed Jun. 5, 1990
4883184 Cable arrangement and lifting platform for stabilized load lifting Nov. 28, 1989
4772175 Space station erectable manipulator placement system Sep. 20, 1988
4693384 Excavator boom derrick Sep. 15, 1987
4666049 Sideboom excavator with lifting means May. 19, 1987
4613276 Vehicle with load handling apparatus Sep. 23, 1986
4572383 Crane Feb. 25, 1986
4506791 Ship's derrick Mar. 26, 1985
4480757 Collapsible frame support for pivotal boom on a portable crane Nov. 6, 1984
4392574 Tower crane Jul. 12, 1983
4310277 Apparatus for transferring cargo between relatively movable bodies Jan. 12, 1982
4144973 Combination hoist and mount Mar. 20, 1979
3967744 Extensible reach load lifting mechanism Jul. 6, 1976

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