Double action hand pump structure

Details Double action hand pump structure Double action hand pump structure

1979-04-25

1981-03-03

Freeh, William L.

Pumps

Expansible chamber type

Plural pumping chambers

74491, 74523, G05G 120, F04B 3900

Patent

active

042538041

ABSTRACT:
A linkage arrangement which minimizes wear in coupling a hand operated lever to a piston or diaphragm type fuel transfer pump. The arrangement includes U-shaped pin structure which establishes a pair of pivot pins about which may respectfully freely pivot (1) a reciprocating pump action rod, and (2) one end of elongated linkage structure, i.e., as the hand operated lever is operated. Although, relative pivotal movement between the lever and the pair of pivot pins is absolutely impossible even though the pin structure is freely received in aligned apertures provided in the lever, the rod and the linkage structure, thereby substantially eliminating any wear of the lever per se, i.e., particularly adjacent the pivot points thereof and eliminating wear on the pivot pins which would otherwise be caused by relative movement between the parts.

REFERENCES:
patent: 1482256 (1924-01-01), Drall
patent: 1775975 (1930-09-01), Swainson
patent: 2843051 (1958-07-01), Allen
patent: 2845033 (1958-07-01), Wright
patent: 3530771 (1970-09-01), Bowman
patent: 4048800 (1977-09-01), Cancilla

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