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
Flash multi-level threshold distribution scheme
Control device of hybrid vehicle
System for implementing dynamic pseudorandom keyboard remapping
Telephone relaying apparatus, telephone relaying method, and program
Biological analysis arrangement and approach therefor
Categorization of design rule errors
Transaction finance processing system and approach
  Randomly Featured Patents
Reducing the time to convert an analog input sample to a digital code in an analog to digital converter (ADC)
Method of synthesizing fenofibrate
Clean spout funnel and sleeve therefor
Air decompaction of paper webs
Aircraft split hydraulic system
Coded intravenous tubing
Rack and pinion steering gear for motor vehicle
Method of detecting native proBNP
Process for producing an automatic command for an anti-tank trap and igniter for implementing the process
Inter-M-phenylene-13,14-didehydro-PGF.sub.1 compounds