Resources Contact Us Home
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
Cycloalkylamine substituted isoquinoline derivatives
Apparatus for performing timer management regarding a system timer scheduler service, and associated method
Luggage cart
Leg mounted portable computer
Semiconductor fin device and method for forming the same using high tilt angle implant
Epilation apparatus
Nitrogen and hindered phenol containing dual functional macromolecular antioxidants: synthesis, performances and applications
  Randomly Featured Patents
Electric condiment grinder
Ceramic sintered body and method for producing ceramic sintered body
Pump drive
Semiconductor device having super junction structure and method for manufacturing the same
Differential firing head and method of operation thereof
Data capture system erases all information stored in flash memory if available storage in the flash memory is less than the maximum segment size
Authentication and security in wireless communication system
Method of manufacturing a semiconductor laser
Paint roller cleaner
Electrical contact element for medium or high voltage electrical equipment, and corresponding, method and equipment