초록 ▼

There is disclosed a power-driven chain saw converted from a stripped-down power-driven circular power hand saw which has a unitary housing adapted to be mounted on the power unit of the stripped-down power-driven hand saw. The housing has bosses or raised portions which separate the housing into th

There is disclosed a power-driven chain saw converted from a stripped-down power-driven circular power hand saw which has a unitary housing adapted to be mounted on the power unit of the stripped-down power-driven hand saw. The housing has bosses or raised portions which separate the housing into three vertical channels the sides of which are intact down to the open bottom ends thereof. The bosses are for mounting a chain support bar and a guard member and the channels are first, for the ascending chain, the second is for the descending chain, and the third, for venting sawdust. A deflector deflects sawdust into the vent channel. A sprocket floats on a splined shaft to accommodate different support bars, and special oiling ducts and special support bar adjustments are disclosed.

대표청구항 ▼

In a power-driven chain saw which comprises: a power unit having a mounting face and a drive shaft projecting normally therefrom; a housing member having a base portion, having a bottom edge and an obverse face, the reverse face of which is adapted to be affixed to said mounting face; side members w

In a power-driven chain saw which comprises: a power unit having a mounting face and a drive shaft projecting normally therefrom; a housing member having a base portion, having a bottom edge and an obverse face, the reverse face of which is adapted to be affixed to said mounting face; side members which project from all of the periphery of said base portion except at the bottom edge thereof; a cover member adapted to be affixed to said side members; a driven shaft projecting from said base portion axially into said housing member parallel to said side members and adapted to be driven by said drive shaft when said housing member is mounted on said mounting face; a chain-saw sprocket mounted on said driven shaft within said housing member; a chain-saw chain support bar affixed to said housing member on a raised support-bar boss on the obverse face of said base member in functional alinement with said sprocket; a raised chain-saw chain guard support-boss on the obverse face of said base portion; said support-bar boss having parallel side faces, one of which is parallel to a side member and forms therewith a first chain-saw chain channel for the portion of the chain traveling to the sprocket and the other of which is parallel to a face of said guard-support and forms therewith a second chain-saw chain channel for the portion of the chain traveling from the sprocket; the improvement in said housing member in which: the sides of said housing member comprise an arcuate portion spanning said first and second channels and flaring out and down beyond said guard support-boss thereby forming a vent channel for venting sawdust; and deflecting means for deflecting sawdust into said vent channel.