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. 15, 2003
Filed:
Apr. 12, 2002
Ming-Fu Jong, Ping-Chang, TW;
Jenn Feng Industrial Co., Ltd., Ping-Chang, TW;
Abstract
A safety device for on/off switch of an electric tool comprises a casing having a switch and a link assembly, in which the link assembly is composed of a knob, a first link lever, a second link lever, a trigger, and a dog. The pivotal joint correlation among those components are: the trigger, the second link lever, and the knob to the casing; the first link lever to the trigger; the second link lever to the first link lever; the knob to the second link lever; and a dog to the first link lever. Moreover, a protruding portion thereof is positioned corresponding to the switch. In operation of an electric tool of this kind, a user is requested to depress both said trigger and knob with his two hands respectively and simultaneously so that the dog is pulled upwardly to travel a longer-distance stroke to have its protruding portion depressed the switch to trigger the power, otherwise, by depressing either said trigger or knob with a single hand, the operation is in vain.