The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2007
Filed:
Mar. 31, 2005
Applicants:
Ian Mcgill, Auckland, NZ;
Zhuang Tain, Auckland, NZ;
Inventors:
Ian McGill, Auckland, NZ;
Zhuang Tain, Auckland, NZ;
Assignee:
Fisher & Paykel Appliances Limited, Auckland, NZ;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H20K 41/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A sensorless method of detecting piston collisions in a reciprocating free piston linear compressor driven by an electronically commutated linear motor having at least one excitation winding is provided. A free piston gas compressor is also provided.