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
EpCAM as a reprogramming factor for non-pluripotent cells
Method for media access controlling and system and method for channel time reservation in distributed wireless personal area network
Permeable pressure sensitive adhesive
Image forming apparatus and method
Power consumption management in a MIMO transceiver and method for use therewith
Apparatus for controllable delay cell and associated methods
Method for producing coated steel sheet
  Randomly Featured Patents
Multi-media information service center and multi-media communication system
Temperature measurement apparatus
Tubular filter element having a sealing arrangement with a housing post
Multi-function docking assembly for portable digital media storage and playback device
Computer displays
Dual purpose adjustable tree stand unit
PN junction floating gate EEPROM, flash EPROM device
Winter golf driving range
Electro-tactile stimulator
Circuitry and method for detecting frequency deviation caused by aging of an oscillator