Sound attenuating motor end shield

Details Sound attenuating motor end shield Sound attenuating motor end shield

1997-08-08

2000-10-10

Martin, David S.

Acoustics

Sound-modifying means

Housing or enclosure

181198, 181200, 181201, 181202, 181205, 181207, 181209, 417312, 41742314, 4174104, 417572, 310 51, 310 89, 310157, H02K 524

Patent

active

061291765

ABSTRACT:
A hydraulic pump-motor having an end shield which deadens the sound generated by the pump-motor do 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, the end plates of the present invention deaden the sounds stemming from the vibration of the pump-motor. In addition, the present invention provides an end shield design which allows the stator to be secured to the motor housing and the air gap between the rotor and the stator to be precisely measured prior to the installation of the end shield. The present invention therefore results in not only a quieter pump-motor but also a pump-motor with higher machining tolerances, improved efficiency, and lower production and maintenance costs.

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patent: 5327036 (1994-07-01), Carey
patent: 5354182 (1994-10-01), Niemiec et al.
patent: 5536140 (1996-07-01), Wagner et al.
patent: 5605448 (1997-02-01), Martin, Sr.

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