Pumps – Motor driven – Fluid motor
Patent
1995-01-31
1996-08-13
Bertsch, Richard A.
Pumps
Motor driven
Fluid motor
91352, F04B 9135
Patent
active
055450164
ABSTRACT:
A pneumatic pump of the type having a pair of pump chambers each divided by a diaphragm assembly coupled by a main shaft includes a housing having a central valve chamber. The valve chamber is provided with a pair of internal walls between which a valve body reciprocates. The valve body alternatively connects passageways from the pump chambers to the pump exterior, while pressurized gas supplied to the valve chamber simulataneously pressurizes the other pump chamber. The valve body is mechanically coupled to the diaphragm shaft, whereby the pump chambers are pressurized and evacuated on synchronism with diaphragm operation. The valve body is accessible through an aperture in the housing, allowing the body to be replaced without pump disassembly. An integral counter, mounted in the pump housing, is also coupled to the diaphragm shaft, and provides a count of the number of shaft reciprocations performed.
REFERENCES:
patent: 571751 (1896-11-01), Crocker
patent: 2483924 (1949-10-01), Moulinier
patent: 3317083 (1967-05-01), Morrill
patent: 4037616 (1977-07-01), Pinkerton
patent: 4172698 (1979-10-01), Hinz et al.
patent: 4468222 (1984-08-01), Lundquist
patent: 4540349 (1985-08-01), Du
patent: 5334003 (1994-08-01), Gardner et al.
Bertsch Richard A.
McAndrews, Jr. Roland G.
Standard-Keil Industries, Inc.
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