Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Electronic currency, electronic wallet therefor and electronic payment systems employing them
Data latch circuit and electronic device
Real-time demand prediction in a fast service restaurant environment
Vehicle lamp component
Polyester resin for toner, electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming met
Relative pose estimation of non-overlapping cameras using the motion of subjects in the camera fields of view
Escutcheon
  Randomly Featured Patents
Crosslinked polymer solutions and methods of use
Clamping cord with polymeric wedge component, and method of affixation
Apparatus for the metal working of components
Method and system for dynamic tracking utilizing leaky wave antennas
Document processing apparatus capable of increasing printing efficiency by forming virtual document and storage medium
Speculum with stop blocks
Apparatus for reducing wastage in a multiple-head extrusion device
Table lamp
Tape cassette having first and second write inhibit mechanisms
Natural gas conditioning system and method