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:
Nov. 02, 2004
Filed:
Nov. 13, 2002
Applicant:
Inventors:
Ian McGill, Auckland, NZ;
Zhuang Tian, Auckland, NZ;
Assignee:
Fisher & Paykel Appliances Limited, Auckland, NZ;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H20K 4/100 ;
U.S. Cl.
CPC ...
H20K 4/100 ;
Abstract
A free piston gas compressor comprising a cylinder, a piston reciprocable within the cylinder and a reciprocating linear electric motor derivably coupled to the piston having at least one excitation winding. A measure of the reciprocation time of the piston is obtained, any change in the reciprocation time is detected and the power input to said excitation winding is adjusted in response to any detected change in reciprocation time.
McGill, Ian. (2004). Linear motor controller (U.S. Patent No. 6812597). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6812597
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile