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:
Jun. 22, 1976
Filed:
Oct. 15, 1974
Sidney Hirschkoff, Los Angeles, CA (US);
McCulloch Corporation, Los Angeles, CA (US);
Abstract
A portable chain saw includes a flexible brake band for stopping the cutter chain. A sensing arm is engageable by an arm or hand of an operator to be swung forwardly to tighten the brake band. The sensing arm is continuously biased forwardly to a braking position by a power torsion spring. The same torsion spring also serves to normally hold the sensing arm in a rest position. A latch can be utilized to transmit latching forces from the torsion spring to the sensing arm. Alternatively, the torsion spring itself can serve as a latch to resist forward movement of the sensing arm. The torsion spring is yieldable to enable the sensing arm to be unlatched in response to being struck by the arm or hand of an operator and then swung forwardly by the torsion spring.