Motor-driven hydraulic gear pump having a noise damper

Details Motor-driven hydraulic gear pump having a noise damper Motor-driven hydraulic gear pump having a noise damper

1997-07-07

1999-12-21

Vrablik, John J.

Rotary expansible chamber devices

Combined

4182061, 417540, F04C 218, F04C 1500, F04B 1100

Patent

active

060041196

ABSTRACT:
A motor-driven hydraulic pump for use in motor vehicles and a driving coupler used therein, in which the pump includes a driving gear and a follower gear, an intake chamber and an outlet chamber formed on opposite sides of the meshed gears, a housing for enclosing the intake chamber and the outlet chamber, the housing being supported by a first support on one side and a second support on the other side, and a noise damper including a space inside for reducing noise occurring during the delivery of a working oil, the noise damper communicating with the outlet chamber and being fixed to the second support of the housing, and wherein the driving coupler includes a protruding, undulated sleeve including a mortise mating with a tenon formed on the end of either the driving shaft or the driven shaft, and a sleeve counterpart including a mortise mating with a tenon formed on the end of the other shaft, and a protruding, splined projection which includes splines shaped to fit into the undulated sleeve, with spaces between the undulated sleeve and the splines being filled with an elastic material.

REFERENCES:
patent: 1972271 (1934-09-01), McIntyre
patent: 2912937 (1959-11-01), Insley
patent: 4207033 (1980-06-01), Drutchas et al.
patent: 5692883 (1997-12-01), Vourc'h

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