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:
Apr. 07, 2009
Filed:
Aug. 01, 2006
Applicant:
Chi Hong Ho, Hong Kong, CN;
Inventor:
Chi Hong Ho, Hong Kong, CN;
Assignee:
Eastway Fair Company Limited, , VG;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 3/44 (2006.01); E21B 3/00 (2006.01); E21B 17/22 (2006.01); E21B 19/16 (2006.01); E21B 19/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
A variable speed transmission that changes the output speed of a power tool in response to an increase in torque. The transmission includes a first transmission portion, a second transmission portion, and an annular connector. The annular connector may move via a spring and a control mechanism between a first position and a second position to vary the power tool output between a first and a second speed.