초록 ▼

An attachment for converting a conventional lawn trimmer for chain saw use has a ninety-degree adapter housing to removably mount a chain bar in axial alignment on the cutting head end of the trimmer frame. A bevel gear train connects the trimmer motor drive shaft to a sprocket for driving the chain

An attachment for converting a conventional lawn trimmer for chain saw use has a ninety-degree adapter housing to removably mount a chain bar in axial alignment on the cutting head end of the trimmer frame. A bevel gear train connects the trimmer motor drive shaft to a sprocket for driving the chain, and an oil reservoir and thumb-operated pump mount to the frame to deliver lubrication to the chain during sawing.

대표청구항 ▼

An attachment for converting a conventional hand-held portable apparatus for cutting and trimming vegetation into a chain saw, said apparatus comprising: an elongated tubular frame member; a motor carried at an end of said frame member; a drive shaft connected to said motor; a cutting tool removably

An attachment for converting a conventional hand-held portable apparatus for cutting and trimming vegetation into a chain saw, said apparatus comprising: an elongated tubular frame member; a motor carried at an end of said frame member; a drive shaft connected to said motor; a cutting tool removably secured to an end of said frame member; and means operatively connecting said cutting tool removably to said drive shaft to be driven by said motor; and said attachment comprising: an elongated, planar chain bar having a peripheral groove for receiving and guiding a saw chain therearound; an adapter housing having an input end dimensioned and configured for removably securing said housing to said frame member in place of said cutting tool, and an output end; means mounting said chain bar adjacent said output end of said housing; a chain drive sprocket; means rotatably mounting said sprocket at said output end of said adapter housing adjacent said chain bar for operative connection removably to said drive shaft for driving said saw chain around said bar by said motor under guidance of said groove; an oil reservoir; conduit means for delivering oil from said reservoir to said chain bar for lubricating said chain as said chain is driven around said bar; and means for releasably securing said oil reservoir and said conduit means to said apparatus. A method for converting a conventional hand-held portable apparatus for cutting and trimming vegetation into a chain saw, said apparatus comprising: an elongated tubular frame member; a motor carried at an end of said frame member; a drive shaft connected to said motor; a cutting tool secured to an end of said frame member; and means operatively connecting said cutting tool to said drive shaft to be driven by said motor; said method comprising the steps of: removing said cutting tool from said frame member and from said operative connection to said drive shaft; securing to said frame member, in place of said cutting tool, an attachment including an elongated planar chain bar having a peripheral groove for receiving and guiding a saw chain therearound, and further including a chain drive sprocket rotatably mounted adjacent to said chain bar; said sprocket being brought into operative connection to said drive shaft for driving said saw chain around said bar by said motor under guidance of said groove; and securing to said frame member an oil reservoir and conduit means for delivering oil from said reservoir to said chain bar for lubricating said chain as said chain is driven around said bar.