Piston pump with rotating piston having a universal joint

Pumps – Expansible chamber type – Pumping member position controlled port

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Details

464106, 464150, F04B 706

Patent

active

047086050

ABSTRACT:
Both the rotating drive and also the back and forth movement of the pump piston (5) occurs through a joint arrangement (29), which consists of a first through (65) on the crank (28), a second trough (67) on the piston (5) and a rolling member (30) which is received in the troughs (65, 67). The troughs are pressed by a springy ring (68) against the rolling member (30). The troughs (65, 67) have a slightly smaller curvature than the rolling member (30), so that the rolling member (30) rolls in the troughs (65, 67). Friction in the joint arrangement (29) is avoided through this, which results in a long life of the joint arrangement (29).

REFERENCES:
patent: 2921451 (1960-01-01), Helmke
patent: 3168872 (1965-02-01), Pinkerton
patent: 4008003 (1977-02-01), Pinkerton
patent: 4531897 (1985-07-01), Orlita

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