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
Semiconductor device and method of manufacturing the same
Prompt gap varying optical filter, analytical instrument, optical device, and characteristic measurement method
Reducing voltage stress in a flyback converter design
Electronic device
O-space imaging: highly efficient parallel imaging using complementary nonlinear encoding gradient fields and receive coil geometries
Products for animal use including humans having a certificate verifying at least one of efficacy or safety, and methods of providing such certificates
  Randomly Featured Patents
Data transformation device for image processing
Security badge for automated access control and secure data gathering
Semiconductor device having reduced electromigration in copper lines with calcium-doped copper surfaces formed by using a chemical solution
Photochromic compounds (7)
Storage apparatus, storage control method, and computer product
Fuel generator with diffusion ampoules for fuel cells
Railway vehicle and device for accessing said vehicle
Apparatus for simultaneously applying brakes of a towed vehicle having a self contained braking system when brakes of a towing vehicle are applied
Setting information distribution apparatus, method, program, and medium, authentication setting transfer apparatus, method, program, and medium, and setting information reception program