Resources Contact Us Home
Single-acting, gas-operated pump

Image Number 3 for United States Patent #4828465.

A single-acting, gas-operated, pump method and apparatus including a pump body having a main chamber divided by a reciprocating piston assembly into a gas driving chamber and a liquid pumping chamber, a spring for biasing the piston assembly into one of its two end positions, a reciprocating control valve controlling the flow of driving gas to and from the gas driving chamber, a snap-acting spring mechanically coupling the control valve to the reciprocating movement of the piston assembly, and a counteracting spring for biasing the control valve toward one of its two positions.

  Recently Added Patents
Low drop-out regulator providing constant current and maximum voltage limit
Content display monitor
Organic light emitting device connection methods
Lithographic apparatus and device manufacturing method
Method and apparatus for distributing promotional materials
Methods and compositions for inhibition of neutrophil exocytosis
Retransmission and retransmission request in data communication systems
  Randomly Featured Patents
Flame-retarded acoustic diaphragm
Sample hold circuit having a switch
System for automatic alignment calibration of a data storage library
Patterned coated articles and methods for producing the same
Calibrating digital halftoning algorithms with multiple personalities
Laundry basket
Portable sprayer with safety cover
High speed buffer circuit particularly suited for use in sample and hold circuits
Preparation of ethyl acetate
Semiconductor light emitting device and method for manufacturing same