Volumetric pump shift bottoming detector

Details Volumetric pump shift bottoming detector Volumetric pump shift bottoming detector

1995-06-06

1997-04-08

Vrablik, John J.

Pumps

With signal, indicator, or inspection means

92 5R, F04B 4900

Patent

active

056181639

ABSTRACT:
A bottoming detector for detecting the movement of a pump shaft beyond a pre-determined distance within a cylinder is disclosed. The pump has a housing defining an elongate cavity filled with fluid, a resilient sheet with an aperture in alignment with the cavity which divides the cavity into first and second compartments, and an elongate shaft disposed within the first compartment of the cavity such that it may be moved into and out of the aperture in the sheet to cause pressure fluctuations in the second compartment. There is also a chamber in fluid communication with the second compartment. In the chamber there is actuating means responsive to excessive pressure in the chamber, that actuates a switch to indicate that the shaft has reached a certain distance into the second compartment.

REFERENCES:
patent: 2501707 (1950-03-01), Bent
patent: 3095785 (1963-07-01), Cahill
patent: 3177780 (1965-04-01), Andersen et al.
patent: 3216332 (1965-11-01), Chambeau
patent: 3414693 (1968-12-01), Watson et al.
patent: 3648568 (1972-03-01), Wright
patent: 4751867 (1988-06-01), Johansson et al.
patent: 4804913 (1989-02-01), Shimizu et al.

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