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
Semiconductor device manufacture in which minimum wiring pitch of connecting portion wiring layer is less than minimum wiring pitch of any other wiring layer
Mass spectrometry method
Fast carrier allocation in multi-carrier systems
Blur correction device and imaging apparatus
Label printer
Permanent magnet rotor with flux concentrating pole pieces
Light-emitting diode devices
  Randomly Featured Patents
Anti-spin handle for pump jack
Personal alarm device for headwear for proximity detection
Pipetting system with a pipetting device and at least one pipette tip releasably fastened thereto
Semiconductor device and manufacturing method therefor
Vapor removal apparatus for oil/water separator
Dada decoding
Method for identifying a code group representative of a number of base stations
Fire fighter water manifold
Separation control for multiphase plural inverter system
Optical mount and method for use thereof