Reciprocating piston pump

Details Reciprocating piston pump Reciprocating piston pump

1991-01-14

1992-03-31

Bertsch, Richard A.

Pumps

Expansible chamber type

Plural pumping chambers

417523, 417273, 92 72, 92129, F04B 2304, F04B 2104, F04B 100

Patent

active

051003058

ABSTRACT:
The invention is directed to improving the performance of a reciprocating piston pump in terms of noise. The reciprocating piston pump has a drive shaft, which has a circular cylindrical swash member, which is set at an acute angle (.beta.) to the longitudinal axis (O) of a pump and has a circumferentially disposed roller bearing ring. A pump piston, with its end face embodied as part of a spherical surface, engages the circumferential face of the roller bearing ring of the swash member. The longitudinal axes (O, P) of the drive shaft and pump piston extend in the same plane and intersect at right angles. The longitudinal axis (O, T) of the drive shaft and swash member are also offset from one another. Because of this configuration, a pumping phase that is considerably longer than the intake phase during one pumping cycle is attained. Changes in pressure andd force therefore proceed more slowly in the lengthened pumping phase, which improves the noise performance of the reciprocating piston pump. The reciprocating piston pump can for instance be used in vehicle brake systems to pump brake fluid.

REFERENCES:
patent: 2243648 (1941-05-01), Patton et al.
patent: 2680347 (1954-06-01), Kanuch

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