Patents by Inventor Kar Hoe Chan

Kar Hoe Chan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System for reducing compressor noise and suspension spring and snubber arrangement therefor
    Patent number: 8651831
    Abstract: The present invention comprises a suspension spring and snubber arrangement for reducing transmitted noise from a reciprocating compressor at ?-octave frequency band of 500 Hz and preventing the occurrence of resonance frequency during the reciprocating compressor operation, the arrangement comprising: the suspension spring having a plurality of coils and two opposing open ends; at least one snubber for maintaining the integrity and shape of the suspension spring and for preventing displacement of the suspension spring from their intended position; wherein at least one open end of the suspension spring is loosely fitted over the at least one snubber; and further wherein an internal diameter of the suspension spring is larger than a outer diameter of the snubber so that a gap is defined between the suspension spring and the snubber for minimizing physical contact between the suspension spring and the snubber.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: February 18, 2014
    Assignee: Panasonic Refrigeration Devices Singapore Pte Ltd
    Inventors: Akio Yagi, Kar Hoe Chan, Hideki Kawai, Hiroshi Sasano, Chew Thong Khoo