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
Systems and methods for processing telephone calls
Systems and methods for providing a shared folder via television
Fabricated leaf tea products
Data processing apparatus, activation control method, and computer-readable storage medium
Multiple input multiple output transceiver
Radio communication system, transmission apparatus, reception apparatus, and radio communication method in radio communication
Modular microscope construction
  Randomly Featured Patents
Method and apparatus for spline parameter transitions in sound synthesis
System and method of determining the source of a codec
Memory IC and memory device capable of expansion of storage capacity
Exercise apparatus
High strength powder metallurgy nickel base alloy
Method and system for decoding signals, corresponding receiver and computer program product
Freestanding self-propelled device for moving objects
Method and system for compensating for signal deviations in tone signals over a transmission channel
Methods and apparatuses for requesting/providing code phase related information associated with various satellite positioning systems in wireless communication networks
Road construction machine, leveling device, as well as method for controlling the milling depth or milling slope in a road construction machine