Pumps – Motor driven – Fluid motor
Patent
1988-09-30
1990-02-20
Stout, Donald E.
Pumps
Motor driven
Fluid motor
417473, 417539, 92 37, F04B 2306, F04B 4502
Patent
active
049022067
ABSTRACT:
A bellows pump which is disclosed herein has two bellows made of a plastic material and provided with liquid inlet and outlet ports for transferring a liquid by expanding and contracting the bellows. The bellows pump comprises cylinder cases in each of which the bellows is vertically expandably and contractably contained and mounted at its access port side to a ceiling of said cylinder cases, gas pumping means for alternately feeding a compressed gas from a lower end thereof into the cylinder cases, a pair of rods passed through bottoms of the cylinder cases and fixed to the lower ends of the bellows, and adapted to be moved in response to the expansion and contraction of the bellows, and actuating means adapted to be operated in response to the up and down movement of the rods.
REFERENCES:
patent: 2613607 (1952-10-01), Sheen et al.
patent: 2951450 (1960-09-01), Fisher
patent: 3751988 (1973-08-01), Reese, Sr.
patent: 4090818 (1978-05-01), Hope et al.
patent: 4488592 (1984-12-01), Mittal et al.
patent: 4832580 (1989-05-01), Tsuyoshi et al.
patent: 4836756 (1989-06-01), Fukumoto
Horiki Hiroyuki
Kawashima Tutomu
Naito Jisaburo
Nakazawa Takao
Haluna Kabushiki Kaisha
Nisso Engineering Kabushiki Kaisha
Stout Donald E.
Szczecina Jr. Eugene L.
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