Sound attenuating motor end shield for a hydraulic pump

Details Sound attenuating motor end shield for a hydraulic pump Sound attenuating motor end shield for a hydraulic pump

1999-01-07

2000-12-05

Freay, Charles G.

Pumps

Motor driven

Electric or magnetic motor

181202, 310 51, F04B 3504, H02K 524

Patent

active

061558044

ABSTRACT:
A hydraulic pump-motor having an end shield which deadens the sound generated by the pump-motor to thereby result in a quieter unit. The present invention provides a conventional hydraulic pump-motor having an electric motor coupled to a pumping mechanism wherein the motor includes an improved sound attenuating end shield design. Through the use of acoustically deadening materials such as cast iron and polypropylene plastic in the end plates of the present invention deaden the sounds stemming from the vibration of the pump-motor. The end shield includes a ring member which may be die cast aluminum that secures the stator to the housing a central plug of such materials as cast iron or plastic that fills the central opening of the ring member.

REFERENCES:
patent: 4688324 (1987-08-01), Morrill
patent: 5536140 (1996-07-01), Wagner et al.
patent: 5605448 (1997-02-01), Martin, Sr.
patent: 5997258 (1999-12-01), Sawyer, III et al.

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