Resources Contact Us Home
Browse by Category: Main > Construction
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

  Recently Added Patents
Aperture stop
System and method for self service marketing research
Tube lighting fixture
Wireless control kit for camera
Television with a stand
Process for preparing synthetic intermediates of peripherally-selective inhibitors of dopamine-.beta.-hydroxylase involving catalytic asymmetric hydrogenation
Case for electronic device
  Randomly Featured Patents
Animal management system including radio animal tags and additional transceiver(s)
One-main pipe type centralized lubrication apparatus
Articles exhibiting a blood-compatible surface layer and process for providing articles with such a surface layer
Programmed shutter
Device for setting the thickness of cut in cold meat slicing machines
Method and arrangement for processing thin sheets and thin-walled plates or shells that are curved singly or doubly
Curable resin composition
Media player holder apparatus
Heat-absorbing gel material
Article elevating apparatus with inclined roller carriers