Vacuum pump with rotational sliding piston support

Details Vacuum pump with rotational sliding piston support Vacuum pump with rotational sliding piston support

1988-07-14

1990-10-30

Smith, Leonard E.

Pumps

Motor driven

Electric or magnetic motor

417417, F04B 4304, F04B 1704

Patent

active

049665332

ABSTRACT:
A vacuum pump provided with a restoration coil spring 18 having a reduced size and reduced biasing force to render an overall size of the pump compact includes a casing which defines therein a pumping chamber 6 and an operational chamber 3; a piston 7 reciprocally disposed in the pumping chamber, the piston dividing the pumping chamber into front and rear compartments R1, R2; an operational mechanism disposed in the operational chamber for moving the piston; and, a piston rod 4 having one end connected to the piston, the piston rod extending through the rear compartment and the operational chamber. The operational mechanism includes a solenoid armature 13 on the piston rod, and an electromagnet 14, 15 in the operational chamber.

REFERENCES:
patent: 3542495 (1970-11-01), Barthalon
patent: 4335378 (1982-06-01), Coleman
patent: 4599052 (1986-07-01), Langen et al.
patent: 4773305 (1988-09-01), Nissels

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