Cutter for machining counterbore in engine block
AssigneeK-Line Industries, Inc.
InventorDwain L. Kamphuis
Life of this patent
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Abstract
A tool for resurfacing a counterbore of a cylinder bore in an engine block includes a holder fixedly attached to the engine block using existing threaded holes, and a cutter rotatably supported by the holder and axially movable while being rotated. The cutter is positioned to cut and resurface a counterbore in the top of the cylinder bore. A plurality of springs bias the cutter head axially toward the engine block while rotating the cutter, thus providing a uniform force while cutting and resurfacing the counterbore. A ratchet wrench matably engages the upper end of the shaft to rotate the cutter, with the ratchet wrench extending in a single lateral direction from the shaft. A related method is also discussed.
Claims15
A tool for resurfacing a counterbore of a cylinder bore in an engine block, comprising:
- a holder adapted for fixed attachment to the engine block;
- a cutter rotatably supported by the holder and axially movable while being rotated, and including a cutter blade positioned to cut and resurface a counterbore in the top of the cylinder bore;
- and
- a biasing device including at least two spaced-apart retractable pins biasing the cutter head axially toward the engine block while rotating the cutter.
A tool for resurfacing a counterbore of a cylinder bore in an engine block, comprising:
- a holder adapted for fixed attachment to the engine block;
- a cutter rotatably supported by the holder and axially movable while being rotated, and including a cutter blade positioned to cut and resurface a counterbore in the top of the cylinder bore;
- and
- a biasing device for biasing the cutter head axially toward the engine block while rotating the cutter,
- wherein the biasing device includes at least one spring positioned to bias the cutter blade away from a body of the holder;
- wherein the biasing device includes lubricious material on an end of the spring that slidably engages the cutter.
A method for resurfacing a counterbore of a cylinder bore in an engine block, comprising steps of:
- attaching a holder to an engine block;
- rotating a cutter that is rotatably supported by the holder and axially moving the cutter while the cutter is rotated to cut and resurface the counterbore in a top of the cylinder bore;
- providing a biasing device including at least two retractable pins on the holder that bias the cutter automatically toward the engine block while the cutter is rotated;
- and
- biasing the cutter head axially toward the engine block while rotating the cutter using the biasing device.
Dependencies are inferred from the claim text.