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:
Jul. 12, 2011
Filed:
Aug. 23, 2007
Applicants:
Hughes Sanoner, Hong Kong SAR, CN;
Desmond Wai Nang Tse, Hong Kong SAR, CN;
Lawrence Chi Hang Chan, Hong Kong SAR, CN;
Inventors:
Hughes Sanoner, Hong Kong SAR, CN;
Desmond Wai Nang Tse, Hong Kong SAR, CN;
Lawrence Chi Hang Chan, Hong Kong SAR, CN;
Assignee:
Solar Wide Industrial Ltd., Tsuen Wan, New Territories, HK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V 3/11 (2006.01); G01N 27/72 (2006.01);
U.S. Cl.
CPC ...
Abstract
A metal detector for detecting the presence of a ferrite object in the proximity of inductively coupled sensor having overlapping D shaped transmitter and receiver coils. The metal detector has a phase shift circuit to phase shifting a sensor output signal by a known amount and a switch operating in synchronization with an excitation signal of the sensor for sampling the amplitude of the phase shifted output signal.