US Patent 7988427 Compressor muffler

Patent 7988427 was granted and assigned to Carrier Corporation on August, 2011 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

Carrier Corporation

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7988427

Date of Patent

August 2, 2011

Patent Application Number

11816669

Date Filed

October 26, 2005

Patent Citations Received

Patent Primary Examiner

‌

Charles G Freay

Patent abstract

A compressor has first (26) and second (28; 30) enmeshed rotors rotating about first (500) and second (502; 504) axes to pump refrigerant to a discharge plenum (42). The compressor includes a muffler system (200) comprising a sound absorbing first element (232) and a sound absorbing second element (236). The second element at least partially surrounds the first element and defines a generally annular flow path portion (230) between the first element and the second element. A wall (250) at least partially surrounds the second element. A space (259) optionally containing a sound absorbing third element (261) surrounds the wall.