Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Dock leveler hydraulic circuit










Image Number 2 for United States Patent #5511267.

A dock leveler having a deck assembly, a first hydraulic cylinder to power said deck assembly to a raised position, lip mounted to said deck assembly, and a second hydraulic cylinder for powering said lip into an extended position. An hydraulic power circuit is coupled to the first and second hydraulic cylinders to control movement of said deck and lip. The hydraulic power circuit includes a pump to deliver fluid under pressure, a first valve operatively coupled to the pump to control fluid flow to the first hydraulic cylinder. A second valve is operatively coupled to the second hydraulic cylinder. An adjustable relief valve is coupled to the second valve to prevent a reduction of fluid pressure to the second hydraulic cylinder after the pump has supplied fluid under pressure through the second valve to extend the lip.








 
 
  Recently Added Patents
Produce container and lid assembly
Method of processing data and display apparatus for performing the method
Method and apparatus for soft information transfer between constituent processor circuits in a soft-value processing apparatus
Method of monitoring and configuring
Hydrostatic pad pressure modulation in a simultaneous double side wafer grinder
Method and apparatus for monitoring and/or controlling the curing of cements used in medical procedures
Cooler
  Randomly Featured Patents
Variable hydrostatic bearing between barrel and head of axial piston units
Mailer form and a compound for protecting an image transfer medium
Structure of gold bumps and gold conductors on one IC die and methods of manufacturing the structures
Segmented brush tube structure for acoustic energy dissipation
Check system and method including prioritizing checks for transmission to banks for processing
Light bar mounting foot having a light
Flexible belt arrangement for securing winding conductors
Point synchronization generating circuit for television display and its use for symbol incrustation
Detector apparatus of desorption gas and method therefore
Active hardmask for lithographic patterning