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US 3,940,852 AGranted
Portable hand-held power-operated sheet cutting device
OwnerErnest H. Ruf, deceased, by Norma J. Ruf, executrixinventors
Life of this patent
Estimating the term…
Abstract
A portable hand-held power device having a slotted entryway for sheet material to be cut; a tool mounted for reciprocation across such entryway and formed with an offset shoulder having a cutting edge movable to and from one side of the entryway, acting as a support for the material to be cut, for impacting a sheet against such side and shearing successive sections of material therefrom as the sheet is advanced through the entryway.
Claims6
A portable hand-held power-operated sheet-cutting device comprising:
- a support;
- a head and mounting means therefor positioning said head in spaced relation to said support and defining therewith a slot providing an entryway for a sheet to be cut;
- and
- a tool mounted for reciprocation across said slot substantially perpendicular to said support and being formed with a shoulder offset in the direction of said entryway and providing a cutting edge confronting and being beveled in the direction of said support for impacting a sheet against said support and shearing a chip of material therefrom, said tool having a tapered cross section with its widest dimension at its leading side and a reduced width at its opposite trailing side to provide clearance in the cutaway part of said sheet to permit relative rotational displacement of said tool and sheet for cutting curved configurations;
- said mounting means securing said head to said support adjacent the side of said tool opposite said shoulder and having a dimension perpendicular to said slot less than the width of said cutting edge so as to pass by said mounting means the cutaway portion of said sheet and providing a pivotal support for said head for rotational displacement of said head in a plane substantially perpendicular to the axis of reciprocation of said tool thereby enabling said head to follow cutting of said sheet in a curved configuration;
- and
- spring means biasing the rotational position of said head for straight-line cutting of said sheet.
4 more elements
A portable hand-held power-operated sheet-cutting device comprising:
- a support;
- means spaced from said support and defining therewith a slot providing an entryway for a sheet to be cut;
- a tool mounted for reciprocation across said slot substantially perpendicular to said support, said tool being formed with a shoulder offset in the direction of said entryway and providing a cutting edge confronting said support for impacting a sheet against said support and shearing a section of material therefrom;
- means adapted for mounting said support on a saber saw having a reciprocating saw chuck;
- and
- means connecting said tool to said chuck.
3 more elements
Dependencies are inferred from the claim text.