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
Cardiac function management integrating cardiac contractility modulation
Soybean cultivar CL0911444
System or method to assist and automate an information security classification and marking process for government and non-government organizations for information of an electronic document
Input system including position-detecting device
Semiconductor device element formed on SOI substrate comprising a hollow region, and having capacitors in an electric field alleviation region
Automatic logical position adjustment of multiple screens
Vacuum cleaner filter adapter ring
  Randomly Featured Patents
Acoustic conduit for use with a stethoscope
Method and apparatus for myocardial wall measurement
Door holding apparatus
Flywheel assembly
Bodyboard with stiffening reinforcement
Wait-time service in a telecommunications network
High-strength nanostructured alloys
System and method for automatically initiating and dynamically establishing secure internet connections between a fire-walled server and a fire-walled client
Method and apparatus to prevent receiver desensitization from radiated HDMI signals in accessor or computing devices
Desulfurization process