Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Fluid-operated compound switch










Image Number 4 for United States Patent #4900883.

In a preferred embodiment, a fluid-operated switch continuously and selectively adjustable over both a pressure range and a vacuum range. The switch includes a diaphragm enclosed in a housing, a first side of the diaphragm communicating with the fluid. On the second side of the diaphragm, actuator means are provided which actuate an electrical switch when the diaphragm is flexed by changes in the pressure or vacuum of the fluid. A main spring provides adjustable resistance to motion of the actuator means in the direction of diaphragm flexure corresponding to an increase in pressure, while a counterspring provides resistance to motion of the actuator means in the direction of diaphragm flexure corresponding to an increase in vacuum. Adjustment of the set point of the switch is effected through adjusting the degree of compression or relaxation of the springs by adjusting a threaded bonnet on the housing. At one degree of compression, the spring forces are balanced and further compression will selectively shift the set point into the pressure region, while relaxation of the springs from that balance point will selectively shift the set point into the vacuum region. Thus, one valve body with one set of internal elements can be field adjusted for either pressure or vacuum operation.








 
 
  Recently Added Patents
Data security for dynamic random access memory using body bias to clear data at power-up
Information processing apparatus capable of authentication processing with improved user convenience, control program for information processing apparatus, and recording medium having control
Virtual physician acute myocardial infarction detection system and method
Cis-alkoxy-substituted spirocyclic 1-H-pyrrolidine-2,4-dione derivatives
Control apparatus for autonomous operating vehicle
System and method of interfacing co-processors and input/output devices via a main memory system
Method of creating exercise routes for a user and related personal navigation device
  Randomly Featured Patents
Hermetic sealing of gallium arsenide components
Acetoacetylated polyvinyl polymers
Semiconductor device and method of manufacturing the same
Systems and methods for controlling serially connected transmitters in RFID tag tracking
Redundant control apparatus
Transaction recovery in a value transfer system
Shredder attachment for a food processor
Method of forming a film in recess by vapor phase growth
Pre-aligning a substrate in a lithographic apparatus, device manufacturing method, and device manufactured by the manufacturing method
Motor vehicle chassis