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The specification discloses a motor housing, with a handle of the circular saw type, and a cantilever saw bar carrying a saw chain is secured to the housing in a position extending downwardly from a guide foot of the housing. A retractable guard bar normally is held in a position holding a guard loo

The specification discloses a motor housing, with a handle of the circular saw type, and a cantilever saw bar carrying a saw chain is secured to the housing in a position extending downwardly from a guide foot of the housing. A retractable guard bar normally is held in a position holding a guard loop around the nose end of the saw bar, the guard bar being positioned at the rear of the saw bar. The guard bar is mounted slidably on the motor housing, and, when a latch is manually released, the guard loop may be pushed up along the saw during a boring (nose cutting) operation. In an alternate embodiment, a foot attachable to a foot of a circular saw motor carries a saw bar and a guard bar with a guard loop surrounding the nose end of the saw bar.

대표청구항 ▼

In a power saw: a motor having a housing, a guide plate attached to the housing, a saw bar secured to the housing in a position extending from the guide plate and having a nose portion remote from the guide plate, a sprocket driven by the motor, a saw chain entrained about the sprocket and the saw b

In a power saw: a motor having a housing, a guide plate attached to the housing, a saw bar secured to the housing in a position extending from the guide plate and having a nose portion remote from the guide plate, a sprocket driven by the motor, a saw chain entrained about the sprocket and the saw bar, a rigid guard bar having a thickness less than the thickness of said saw chain, a guard member mounted on one end of the guard bar, and mounting means mounting the guard bar on the housing in a position extending along a rear edge of the saw bar in the plane of the saw bar for longitudinal adjustment between an extended position in which the guard member covers the nose portion of the saw to prevent cutting by the saw chain in the region of the nose portion and a retracted position in which the guard member is withdrawn from the nose portion to allow cutting in the region of the nose portion while normally exposing the forward edge of the saw bar.