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
Vehicle headlight
Web-based royalty system and user interface
Packaging
Pet grooming brush and vacuum attachment
Bull stationery tab
Braided boomerang pet toy
Method of transmitting and receiving a paging message in a mobile communication system
  Randomly Featured Patents
Combined gate cap or digit line and spacer deposition using HDP
System and method for host-level malware detection
Pushbutton stopcock assembly
Dosing cap
Method and apparatus for an ocean bottom seismic acquisition technique
Image recording device, image reproducing device, recording medium, and image recording method for capturing images at different frames rates and generating timestamps for presentation
Logically ordered arrays of compounds and methods of making and using the same
Drum type washing machine
Method and apparatus for sharing many thought databases among many clients
Using a USB host controller security extension for controlling changes in and auditing USB topology