Cutter head with cover for drive pinion

Details Cutter head with cover for drive pinion Cutter head with cover for drive pinion

1998-12-02

2000-09-05

Watts, Douglas D

Cutlery

Cutting tools

Saw

30381, B27B 1700

Patent

active

061124192

ABSTRACT:
A cutter head assembly for a motor chain saw has a cutter head housing and a drive shaft mounted in and projecting from the cutter head housing. A drive pinion is mounted on the portion of the drive shaft projecting from the cutter head housing. A guide bar having a first end positioned adjacent to the drive pinion is provided. A saw chain is driven by the drive pinion and circulates on the guide bar. A cover covering the drive pinion and resting at least in an area of outgoing deflection of the saw chain at a housing wall of the cutter head housing defines a cuttings chamber open toward the guide bar. The first end of the guide bar is clamped between the housing wall of the cutter head housing end the cover. The cover has a cuttings ejection opening opposite the housing wall in the vicinity of the area of outgoing deflection. The cuttings ejection opening has a rim extending in a circulating direction of the saw chain and a ramp projecting from a first portion of the rim into the cutting chamber.

REFERENCES:
patent: 4916818 (1990-04-01), Panek
patent: 5718050 (1998-02-01), Keller

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