Dual bellows pump with drive circuit through bellows

Details Dual bellows pump with drive circuit through bellows Dual bellows pump with drive circuit through bellows

1985-06-03

1986-04-29

Croyle, Carlton R.

Pumps

With signal, indicator, or inspection means

417412, 310 13, 310 27, F04B 2100, F04B 4300, H02K 3300

Patent

active

045853975

ABSTRACT:
A pump includes a pair of circular metal bellows rigidly secured to the pump housing at the perimeter of their accordion-like ring structures and interconnected at their centers so as to be capable of flexing in phase. An electrical coil is attached to the interconnected bellows and is axially movable with the bellows. The coil is surrounded by a permanent magnet structure secured to the pump housing. Each bellows communicates with an associated fluid chamber which has a valve structure for the inlet and outlet of fluid. The coil is electrically connected to an alternating current power supply, the connection being made through the electrically conductive bellows. The bellows flex in phase in the presence of the alternating current to the coil and thus alternately pull fluid in and force fluid out of the respective fluid chambers. Since the fluid chambers are connected to a common fluid output and since the bellows axially flex in phase, there are two pressure pulses per pump cycle.

REFERENCES:
patent: 1941642 (1934-01-01), Vincent
patent: 2061869 (1936-11-01), Gilbert et al.
patent: 3143969 (1964-08-01), Eames et al.
patent: 3781140 (1973-12-01), Gladden
patent: 4421464 (1983-12-01), Schmidt et al.
patent: 4468170 (1984-08-01), Hanset

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