Mortiser
AssigneeFisch Precision Tools, Inc.
InventorAnthony G. Hinch
Life of this patent
Estimating the term…
Abstract
A mortiser has a housing mounted on a support post and there is a collet on the housing for holding a mortise chisel. A chisel drive coupling is on the housing. A chisel drive shaft extends through the housing and connects with the chisel drive coupling. A reciprocal engagement mechanism is capable of selectively engaging the chisel drive coupling. An operating lever may thus be quickly indexed so that the mortise chisel may be filly lowered without the user pulling the operating lever fully toward him/her and downward. The mortiser also has a finely adjustable ram fence and a depth stop. The collet has a notched or elliptical bore to prevent jamming of the chisel shank in the collet.
Claims27
A mortiser for making a mortise cut in a work piece comprising:
- a base;
- a table mounted on the base;
- a housing supported above the base;
- a collet connected with the housing for receiving a mortise chisel shank;
- a motor;
- a chisel drive shaft extending through the housing;
- a chisel drive coupling attached to the chisel drive shaft;
- a collet lowering mechanism connected with the chisel drive shaft;
- a reciprocal engagement mechanism capable of selectively engaging the chisel drive coupling;
- and
- an operating lever attached to the reciprocal engagement mechanism for rotating the chisel drive shaft and for reciprocating the reciprocal engagement mechanism into and out of engagement with the chisel drive coupling,
- whereby when the coupling and reciprocal engagement mechanism are engaged and an operator pulls the lever, the chisel drive shaft and the collet lowering mechanism cooperate to lower the collet toward the work piece.
A method of abrading a work piece using a motorized machine which is configured to vertically engage and disengage a cutting tool with the work piece, comprising the steps of:
- (a) positioning the work piece below the cutting tool;
- (b) engaging an operating lever with a drive coupling on the machine, the drive coupling mechanically interconnected with the cutting tool so as to permit upward and downward movement of the cutting tool;
- (c) lowering the cutting tool a first increment toward the work piece by pulling the lever from a first position to a second position;
- (d) disengaging the lever from the drive coupling;
- (e) repositioning the lever to the first position;
- (f) reengaging the lever with the drive coupling;
- and
- (g) further lowering the cutting tool a second increment by again pulling the lever from the first position to the second position.
A mortiser for making a mortise cut in a work piece, comprising:
- a base;
- a table mounted on the base;
- a housing supported above the base;
- a collet mounted on the housing for receiving a mortise chisel shank;
- a motor;
- a mechanism for raising and lowering the collet;
- and
- the collet having a chisel shank removal device in an interior bore of the collet to facilitate removal of the chisel shank from the collet.
A machine for abrading a work piece, comprising:
- a base;
- a table mounted on the base;
- a housing supported above the base;
- a mechanism for holding a cutting tool, extending downward from the housing;
- a motor;
- and
- an adjustable fence positioned on an upper surface of the table, with at least one fence ram assembly connected with the adjustable fence,
- wherein the fence ram assembly comprises at least one positive stop slidably attached to a cylindrical ram, a post having an internal bore, a set screw hole, and a set screw with set screw handle, the cylindrical fence ram being journaled in the bore of the post and attached to the rear side of the adjustable fence.
A mortiser for making a mortise cut in a work piece, comprising:
- a base;
- a table mounted on the base;
- a housing supported above the base;
- a collet extending downward from the housing for receiving a mortise chisel shank, the collet having a device to facilitate removal of the chisel shank from the collet;
- a motor;
- a chisel drive shaft extending through the housing;
- a chisel drive coupling attached to the chisel drive shaft;
- a collet lowering mechanism connected with the chisel drive shaft;
- a reciprocal engagement mechanism capable of selectively engaging the chisel drive coupling;
- and
- an operating lever attached to the reciprocal engagement mechanism for rotating the chisel drive shaft and for reciprocating the reciprocal engagement mechanism into and out of engagement with the chisel drive coupling,
- whereby when the coupling is engaged and an operator pulls the lever, the chisel drive shaft and the collet lowering mechanism cooperate to lower the collet toward the work piece, and
- further including an adjustable fence positioned on an upper surface of the table, the adjustable fence having at least one fence ram assembly positioned behind the fence, the fence ram assembly comprising at least one positive stop slidably attached to a cylindrical ram, a post having an internal bore, a set screw hole, and a set screw with set screw handle, the cylindrical fence ram being journaled in the bore hole of the post and attached to the rear side of the adjustable fence.
Dependencies are inferred from the claim text.