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










Image Number 17 for United States Patent #7862002.

To provide a vacuum valve with an improved endurance of a bellows, a vacuum valve comprises: a valve section including a first port, a second port, a valve seat provided between the first and second ports, and a valve element movable into or out of contact with the valve seat; an actuator section including an orifice through which an operating fluid is supplied to the actuator section, and a piston coupled to the valve element, the piston being allowed to operate according to changes of pressure of the operating fluid to apply a driving force to the valve section; and a bellows which can be contracted and elongated as the valve element vertically moves upward and downward. The orifice is designed to have an effective sectional area determined so that an operating speed of the valve element and the piston is controlled to a predetermined speed for preventing damage of the bellows.








 
 
  Recently Added Patents
DC/DC converter, power supply circuit, and semiconductor device
Plants and seeds of hybrid corn variety CH717591
Phone messaging using audio streams
Decision management system and method
Techniques to manage communications resources for a multimedia conference event
Module-code verification layer to automatically validate user input
Pharmaceutical and diagnostic compositions for use in the treatment and diagnosis of neurodegenerative diseases or amyloid diseases
  Randomly Featured Patents
Method and apparatus for measuring flow motions in a fluid
Apparatus for the undirectional vibration testing of an equipment under a controlled atmosphere
Continuous reaction for preparation of arylene sulfide polymer
Analyzer with improved rotor structure
Apparatus for a test access architecture for testing of modules within integrated circuits
Semiconductor device and method of manufacturing the same
Golf practice and training device
Photoresist composition
Mini retractor
Safety identification assembly and method