Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Pneumatic relay valve










Image Number 2 for United States Patent #4480663.

The invention relates to a pneumatic relay valve for regulating output pressure in proportion to a control pressure.The relay valve includes a first piston member which is acted on by the control pressure and a second piston member which is acted on by the input pressure.A compression spring is located between the two relay piston members.The strength of the compression spring determines the height of a predetermined minimum controlled pressure even if the input pressure is subsequently lost or drops to a low value.In addition, the output pressure of a receiver can be maintained at a specific adjustable level which may be below the maximum pressure value of the input pressure due to the compression spring located between the two relay piston members.








 
 
  Recently Added Patents
Method for forming a semiconductor device using selective epitaxy of group III-nitride
Method for culturing lactic acid bacterium and method for producing fermented milk
Plants and seeds of hybrid corn variety CH367819
Base station device and wireless communication method
Protecting information written to recording medium
Optical power measurement method, optical line terminal and optical network unit
Morphinan compounds
  Randomly Featured Patents
Toy motorcycle
Earphone antenna and portable radio equipment provided with earphone antenna
Retainer for laryngeal mask
Pentanoic acid derivatives
Fuel injection control device for an internal combustion engine with throttle opening detection means
Telecommunication system, radio base station thereof, and portable telecommunication terminal thereof
Removal of hydrogen sulfide
Ultraviolet absorber containing a benzotriazole compound
Image transforming apparatus to provide special effects
Digital watermarks with values derived from remote platforms