Air pump apparatus

Details Air pump apparatus Air pump apparatus

1982-09-30

1985-11-05

Husar, Cornelius J.

Pumps

Motor driven

Including means utilizing pump fluid for augmenting cooling,...

417415, 417440, 92158, F04B 3504, F01B 3110

Patent

active

045510741

ABSTRACT:
An air pump apparatus having a cylinder extending from a pump casing. The cylinder comprises a cylinder liner positioned within the walls of the cylinder and a piston is mounted for reciprocating movement within the cylinder liner. The pump chamber is formed between the front of the piston and the front portion of the cylinder wherein an annular gap is formed between the piston and the inner wall of the cylinder liner, wherein the piston has a plurality of annular grooves formed on the outer circumferential surface thereof, the annular gap and annular grooves forming a labyrinth path extending from the pump chamber.

REFERENCES:
patent: 1187031 (1916-06-01), Black
patent: 1508805 (1924-09-01), Shaw
patent: 2123815 (1938-07-01), Tweddell
patent: 4304410 (1981-12-01), Erickson et al.

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