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Class Information
Number: 212/250
Name: Traversing hoists > Having horizontally swinging boom or bridge > Having fluid ram directly actuating load cable or sheave therefor
Description: Apparatus including a relatively reciprocating piston and cylinder which are actuated by fluid pressure and are employed to lift the load by directly connecting the piston or cylinder to either the flexible member or a pulley about which the flexible member is entrained.


Patents under this class:

Patent Number Title Of Patent Date Issued
7341157 Enclosed-reeving, live-line boom Mar. 11, 2008
7040552 Suspended boom with gauge members May. 9, 2006
6845872 System for lifting and moving an object Jan. 25, 2005
6532607 Body lift Mar. 18, 2003
6053419 Velocity damping system Apr. 25, 2000
5971178 Impact driven hoist Oct. 26, 1999
5887390 Boom swing control device and assembly Mar. 30, 1999
5597080 Snag load protection system for a crane Jan. 28, 1997
5494117 Metal fence post driver Feb. 27, 1996
5456567 Floor-running stacker crane and method for carrying hot metal Oct. 10, 1995
5421468 Dockside container handling crane with high speed hoist system Jun. 6, 1995
5209361 Multiple-cable lifting head with load weighing mechanism for aerial booms and cranes May. 11, 1993
5018631 Hoist device for a load hanging on hoist ropes, in particular a container-crane May. 28, 1991
4967917 Jib derricking gear for a crane Nov. 6, 1990
4702076 Hydraulically operated clam-shell device Oct. 27, 1987
4686828 Hydraulically operated clamshell device Aug. 18, 1987



 
 
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