US 5,586,928 A · Grinding apparatus with touch-top work surface

Abstract

A grinding apparatus including a cylindrical grinding wheel assembly mounted on a vertical drive shaft extending from an electric motor through a horizontal work table. The apparatus includes a pressure sensitive electrical switch for activating the motor in response to downward force on the work table. The work table is supported on a housing adapted to contain the motor and can be interchanged with work tables of various sizes and configurations. The grinding wheel assembly includes a core element and a grinding element where the grinding element is secured to the core element by various mechanisms to allow the grinding element to be removed from the core element while the core element is secured to the drive shaft so as to interchange the grinding element in the event that a grinding element has been worn out.

Claims16

Dependent claims

A grinding wheel assembly to be secured to a drive shaft of an electric motor associated with a grinding apparatus, said grinding wheel assembly rotating upon rotation of the drive shaft, said grinding wheel assembly comprising:

a core element including an internal bore, said core element being slidably and removably engageable with the drive shaft, said core element including a first cylindrical portion, said core element including first securing means for releasably securing the core element to the drive shaft so as to allow the core element to rotate as the drive shaft rotates;
a cylindrical grinding element, said grinding element being engageable with the first cylindrical portion of the core element and including an outer layer of an abrasive grit;
and
second securing means for securing the grinding element to the core element, said second securing means allowing the grinding element to be removed from the core element independent of the core element being removed from the drive shaft, said first securing means being separate from said second securing means.

1 more element

a core element including an internal bore for accepting the drive shaft in a friction type fit, said core element including a first cylindrical portion of one diameter and a second cylindrical portion of another diameter wherein the one diameter of the first cylindrical portion is less than the another diameter of the second cylindrical portion so as to define a shoulder therebetween, said core element further including set screw means for securing the core element to the drive shaft so as to allow the core element to rotate as the drive shaft rotates;
a cylindrical grinding element including an outer layer of an abrasive grit, said grinding element including an internal bore configured so as to allow the grinding element to slidably attach to the first portion of the core element in a friction type engagement, said grinding element resting on the shoulder when it is attached to the core element;
and
securing means for securing the grinding element to the core element so as to allow the grinding element to rotate with the core element, said securing means allowing the grinding element to be removed from the core element while the core element is secured to the drive shaft.

1 more element

Dependencies are inferred from the claim text.

Grinding apparatus with touch-top work surface

Life of this patent

Grinding apparatus with touch-top work surface

Life of this patent

Abstract

Claims16