Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Hydraulic unloading valves










Image Number 3 for United States Patent #4766926.

An hydraulic unloading valve for unloading hydraulic fluid from a circuit pressurized by a diesel engine powered pump under cold climate conditions to assist starting of the engine. The valve has an inlet through which fluid enters the valve, an outlet through which fluid may leave the valve, an outlet valve seat, a valve member movable towards and away from the valve seat and carrying a valve surface for closing off the seat valve, a first orifice sensitive to viscosity which in response to the flow of fluid through the inlet generates a first pressure drop arranged to tend to move the valve member away from the valve seat, and second orifice which is not sensitive to viscosity and which in response to said flow generates a second pressure drop arranged to tend to move the valve towards the valve seat to bring the valve seat and surface into contact to close-off through the valve outlet when the second pressure drop is greater than the first pressure drop. The pressure drop characteristics of the two orifices can be arranged so that at lower fluid temperatures of say below -10 degrees C. the valve is held open up to higher fluid flow rates, thus relieving load on the engine and assisting cold starting.








 
 
  Recently Added Patents
Solid state lighting devices and associated methods of manufacturing
Portion of display panel or screen with an icon
Wild card auto completion
Lighting apparatus
Synchronization scheduling apparatus and method in real-time multi-core system
Stable aqueous composite compositions
Machine shop including computer system that interfaces with different legacy servers
  Randomly Featured Patents
Knockdown magazine and book rack kit
Method of producing a cyclohexenone oxime ether lithium salt, products which can be obtained using this method, the use thereof and corresponding plant protection agents
Method for preparing transition metal component of Ziegler-Natta catalysts
Method for producing a silicon single crystal having few crystal defects, and a silicon single crystal and silicon wafers produced by the method
Quantization error compensation apparatus and method thereof
Golf balls having two or more core layers formed from HNP compositions
Antenna
Combined folding crank handle and cover assembly for a casement window operator
Grinding machine
Display rack with interlocking dividers