US 4,233,739 AGranted

Chainsaw accessory

OwnerLeslie W. Hinrichsinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

An accessory device is provided for securement to a conventional portable type chainsaw to define a fixed predetermined distance of the cutting plane of the saw from an end of a work to be cut. With this arrangement, successive cuts of identical lengths can be rapidly made. The accessory itself comprises a plurality of straight cylindrical tubes nested in telescoping relationship and with appropriate frictional engagement with each other. With this arrangement, any desired length can be defined by the extent of telescoping of the tubes and the defined lengths remain fixed as a consequence of the friction between the tubes. This fixed length can thus be used for successively measuring off equal cuts of a log or other wood to be cut by the chainsaw and the operator need not be concerned with further adjustments until such time as the successive cuts are to be changed in length.

Claims2

Dependent claims

A chainsaw accessory for use in combination with a portable chain saw to define a fixed pre-determined distance of the cutting plane of said saw from an end of work to be cut so that successive cuts of identical lengths can be rapidly made, said accessory comprising a plurality of straight cylindrical tubes of progressively decreasing diameter so that they can be nested in telescoped relationship, the outermost tube being secured to said chain saw in a position such that the telescoped tubes can be extended in a direction normal to said plane, the outer opening end of each tube from which the next successive tube extends being peened radially inwardly so that the outer end of said next successive tube is frictionally engaged over 360.degree., the inner end opening of each tube surrounded by the next larger tube being flared outwardly to frictionally engage over 360.degree. the inner wall of said larger tube, whereby any length to which the tubes are extended will be maintained by said frictional engagement of the tubes so that said fixed predetermined distance can be changed and retained in the changed position.

Dependencies are inferred from the claim text.