Chain saw chain containment device

• Main Author: THOMSEN KENNETH J
• Format: Patent
• Language: English
• Published: 16.10.2014
• Subjects: ACCESSORY MACHINES OR APPARATUS; AGRICULTURE; ANIMAL HUSBANDRY; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPSOR SEAWEED; FISHING; FORESTRY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HORTICULTURE; HUMAN NECESSITIES; HUNTING; NAILING OR STAPLING MACHINES IN GENERAL; PERFORMING OPERATIONS; SAFETY DEVICES, e.g. THOSE FOR SAWS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; TRAPPING; WATERING; WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL

A device for deflecting a detached cutting chain off the drive sprocket of a chain saw in order to deenergize and arrest it. A ramp provides a surface disposed below the chain guide bar, which surface is oblique with respect to the chain guide bar, slightly below a lower edge of the chain guide bar and obliquely angled with respect to a plane that contains the exterior surface of the chain guide bar, and distal to the drive sprocket. Sliding engagement of a detached cutting chain with the oblique surface moves the cutting chain exteriorly away from the chain guide bar and off the drive sprocket. A chain catcher is also provided to arrest the detached cutting chain and/or chain shot portions thereof.