Resilient chamber fluid sampler having vacuum breaker apparatus

Details Resilient chamber fluid sampler having vacuum breaker apparatus Resilient chamber fluid sampler having vacuum breaker apparatus

1982-09-20

1984-09-11

Freeh, William L.

Pumps

Expansible chamber type

Distributor formed from integral portion of flexible wall...

417520, F04B 4300, F04B 3908

Patent

active

044707738

ABSTRACT:
In a resilient chamber sampling apparatus incorporating a resilient body having a dished cavity area which is squeezed to pressure fluid trapped in the dished area, an improved form preferably incorporates an alternate anvil. It has a facing plate member at the end of the probe over a solid anvil. The cap or plate has a small hole in the center and telescopes with a small peripheral skirt aligning the cap with the resilient plug. On closure, high pressure is formed to force fluid from the cavity in the resilient body. When the probe is pulled away from the resilient body, the vacuum breaker slides in telescoping movement, and opens an external passage to fill the chamber where the fluid was pumped from, and the chamber is restored to its full size without pulling a vacuum, to avoid damage which might occur otherwise.

REFERENCES:
patent: 2745349 (1956-05-01), Tavola
patent: 2929332 (1960-03-01), Pierce
patent: 3945770 (1976-03-01), Welker
patent: 4261690 (1981-04-01), Doescher
patent: 4403518 (1983-09-01), Welker

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