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US 6,332,619 B1Granted
Derosa router chuck
AssigneeJ. P. Walsh/J. P. Marmo Enterprises Inc.
InventorJohn L. DeRosa
Life of this patent
Estimating the term…
Abstract
A chuck for use with power tools to interchangeably accept and hold tools, such as wood or other cutting tools, especially router bits, of simple, lightweight design, improving manufacturing and assembly techniques, providing significant tool holding torque are disclosed. A method for connecting chucks, shafts and similarly threaded surfaces is also disclosed.
Claims19
A chuck,
- said chuck comprising a chuck body;
- said chuck body defining, along its longitudinal centerline, a first aperture sized to receive the shaft of a tool or a collet for said tool;
- a second aperture intersecting said first aperture;
- a single clamping element in said second aperture;
- said clamping element defining an angle ∝ of intersection with said shaft or collet;
- said angle ∝ being from about tangent to not more than 45°;
- said clamping element being relatively moveable within said second aperture from a position in engagement with a shank or collet placed in said first aperture to a position not in engagement with said shank or collet.
4 more elements
A chuck,
- said chuck comprising a chuck body;
- said chuck body defining, along its longitudinal centerline, a first aperture sized to receive the shaft of a tool or a collet for said tool;
- a second aperture intersecting said first aperture;
- a single clamping element in said second aperture;
- said clamping element being relatively moveable within said second aperture from a position in engagement with a shank or collet placed in said first aperture to a position not in engagement with said shank or collet;
- said chuck body further comprising a cone shape concentric with the longitudinal centerline of said chuck body, said cone shape having on its surface a spiral groove.
3 more elements
A method of coupling two elements, said method comprising providing two elements;
- on one of said elements forming a cone shape terminating in a groove at the base of said cone;
- placing a nut about said groove;
- filling said groove with a series of coiled spring washers;
- forming an internal aperture on said other element, said internal aperture having a shape corresponding at least in part to said cone shape,
- inserting said cone shape within said internal aperture;
- securing the two elements together with said nut.
3 more elements
A router chuck comprising a chuck body;
- said chuck body defining a longitudinal aperture to receive a cutting tool or a collet for said cutting tool;
- a single clamping element received in a second aperture intersecting said first aperture;
- said single clamping element designed to contact said cutting tool or collet at or near a tangent to an angle not greater than 45° from tangent.
Dependencies are inferred from the claim text.