초록 ▼

A method and apparatus for use in breaking wood, such as wood splitting and tree felling, for causing the wood to break under the influence of a force acting on the cutting surfaces of a notch in the wood, such as a saw notch. The wood breaking force is produced by means of an inflatable cushion whi

A method and apparatus for use in breaking wood, such as wood splitting and tree felling, for causing the wood to break under the influence of a force acting on the cutting surfaces of a notch in the wood, such as a saw notch. The wood breaking force is produced by means of an inflatable cushion which is inserted in a flattened state into the saw notch and connected to the combustion chamber of the cylinder of the power saw motor to be inflated with compressed gas from the combustion chamber. Also disclosed is a special spark plug for the power saw motor for use in supplying the compressed gas from a combustion chamber to the inflatable cushion.

대표청구항 ▼

Apparatus for producing a breaking force against a cutting surface in a notch, or the like, in wood, comprising: an inflatable cushion insertable in said notch for applying a breaking force to at least one cutting surface in said wood upon inflation of said cushion; conduit means for connecting said

Apparatus for producing a breaking force against a cutting surface in a notch, or the like, in wood, comprising: an inflatable cushion insertable in said notch for applying a breaking force to at least one cutting surface in said wood upon inflation of said cushion; conduit means for connecting said cushion to the combustion chamber of a cylinder of an internal combustion engine; a spark plug connected to said combustion chamber of the cylinder of said internal combustion engine, said spark plug having a passageway therethrough, said passageway being coupled to said conduit means and communicating said conduit means with said combustion chamber; and valve means coupled to said conduit means for controlling the inflation of said cushion by controlling the feed of compressed gas from said combustion chamber to said cushion to sufficiently inflate said cushion to produce said breaking force.