Air pump having an adjustable stroke

Details Air pump having an adjustable stroke Air pump having an adjustable stroke

1996-04-10

1997-10-14

Freay, Charles G.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

4174131, 92 13, F04B 4900

Patent

active

056765274

ABSTRACT:
An adjustable flow pump, particularly an air pump, utilizing reciprocal movement of a diaphragm movement bar to achieve pumping. The stroke of the reciprocating diaphragm movement bar can be adjusted without stopping operation of the pump. The diaphragm movement bar is mounted on a pump main body and a swing member is operably coupled to a rotary output shaft of a motor. The rotary output shaft is connected to a cam which imparts motion to the swing member. The movement of the swing member is transmitted, by a linking member, to the reciprocating diaphragm movement bar which then moves along a linear guide. The stroke of the diaphragm movement bar is adjusted by a linear motion mechanism which is operable to change the position of the swing member relative to the diaphragm movement bar.

REFERENCES:
patent: 2699119 (1955-01-01), Healey
patent: 3496874 (1970-02-01), Findlay
patent: 4420393 (1983-12-01), Smith

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