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
Scanning transmission electron microscope and axial adjustment method thereof
Semiconductor device, integrated circuit and method of manufacturing an integrated circuit
Method for driving bistable display device
Fingerprinting apparatus, system, and method
Workflow optimization for high throughput imaging environments
Control device with adjusting pulse width modulation function and the backlight module thereof
LED lighting module
  Randomly Featured Patents
Golf bag top
NOR flash memory device using bit scan method and related programming method
Systems and methods for automatically processing electronic documents using multiple image transformation algorithms
Glass sheet bending apparatus
Heterocyclic carboxamides
Thermal print head
Switching and control system with four video game boards
Method of making aluminum alkyls
Valve train of an internal combustion engine comprising at least one camshaft
System and method for rapid boot of secondary operating system