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. 06, 2004
Filed:
May. 22, 2003
Kai Chi Chan, Chaiwan, HK;
Man Ting Ho, Chaiwan, HK;
Defond Components Limited, Chaiwan, HK;
Abstract
A trigger assembly for an electric power tool including a motor comprises a base for fixing within the power tool and a trigger supported by the base for inward and outward movement. A mechanical switch in the base switches on and off the motor. An operating circuitry including a solid-state device in the base controls the motor when the switch is closed. A slider guided within the base for movement by the trigger operates the switch and the operating circuitry. The switch has a fixed contact, a moving contact pivotable into contact with and out of contact from the fixed contact, and a spring biassing the moving contact towards the closed position. The moving contact has a first end for contacting the fixed contact and a second end for engagement by the slider to cause pivoting of the moving contact to the open position. Two such switches are used as main and bypass switches, with their moving contacts supported by a common conductive support together forming a switch module to facilitate installation.