Extreme pressure fluid sample transfer pump

Details Extreme pressure fluid sample transfer pump Extreme pressure fluid sample transfer pump

1989-06-08

1990-12-04

Smith, Leonard E.

Pumps

Motor driven

Fluid motor

417437, F04B 3712

Patent

active

049750275

ABSTRACT:
A transfer pump for samples of fluids at very low or very high pressures comprising a cylinder having a piston sealed with an O-ring, the piston defining forward and back chambers, an inlet and exit port and valve arrangement for the fluid to enter and leave the forward chamber, and a port and valve arrangement in the back chamber for adjusting the pressure across the piston so that the pressure differential across the piston is essentially zero and approximately equal to the pressure of the fluid so that the O-ring seals against leakage of the fluid and the piston can be easily moved, regardless of the pressure of the fluid. The piston may be actuated by a means external to the cylinder with a piston rod extending through a hole in the cylinder sealed with a bellows attached to the piston head and the interior of the back chamber.

REFERENCES:
patent: 1891771 (1932-12-01), Mendenhall et al.
patent: 3285191 (1966-11-01), Taplin
patent: 3635092 (1972-01-01), Maughan et al.
patent: 3640082 (1972-02-01), Dehne
patent: 3866474 (1975-02-01), Hasselman
patent: 4459865 (1984-07-01), Welker
patent: 4463599 (1984-08-01), Welker
patent: 4463603 (1984-08-01), Welker
patent: 4515530 (1985-05-01), Christoleit
patent: 4556369 (1985-12-01), Braun
patent: 4635487 (1987-01-01), Gowing
patent: 4781544 (1988-11-01), Leonard et al.

Affiliated with

Also associated with

Rating

Extreme pressure fluid sample transfer pump does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Extreme pressure fluid sample transfer pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extreme pressure fluid sample transfer pump will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-880806