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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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