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:
May. 30, 1978
Filed:
Jan. 19, 1977
Dieter Wieland, Neckarrems, DT;
Volker Schurr, Waiblingen, DT;
Firma Andreas Stihl, Waiblingen, DT;
Abstract
Disclosed is a braking mechanism for a hand-held, motor-driven chain saw, comprising: a brake drum which rotates with the drive for the saw chain; a braking member positioned to selectively contact the brake drum in order to stop the chain; a lever pivotably mounted on the saw and extending to the vicinity of the guide handle; an arm, preferably a V-shaped rocker arm having a locking recess therein, pivotably connected to the saw and connected to the braking member for selectively moving the braking member into contact with the brake drum upon rotation of the arm into a braking position; a spring connected to the saw and to the arm for biasing the arm toward the braking position; a tongue member pivotably attached to the saw and adapted to be moved in contacting relationship with the arm, and to preferably engage in the locking recess in the arm, to move the arm at least out of the braking position and lock it there; and a cam member, separate from the tongue member, pivotably connected to the saw and responsive to rotation of the lever for activating movement of the tongue member relative to the arm, preferably a cam member mounted coaxially and in a common plane with the tongue member.