Sanding apparatus
First Claim
1. Sanding apparatus comprising a housing a drive spindle arranged to rotate in the housing;
- a sanding disk platen mounted on one end of the drive spindle through a freely rotatable bearing disposed eccentrically with respect to the drive spindle, the platen having substantially flat, parallel front and rear surfaces lying substantially perpendicular to the spindle axis;
a sanding disk being adapted to be disposed on said front surface of the platen;
a low friction annular surface being disposed on said rear surface about said bearing; and
a resiliently biased finger brake being mounted in said housing and adapted to bear against said annular surface in a direction substantially parallel to said spindle axis, the brake comprising a body mounted on the housing, a finger slidable in the body, and a spring disposed between said body and a stem of said finger.
1 Assignment
0 Petitions
Accused Products
Abstract
Sanding apparatus comprises a housing for a motor driving a drive spindle. A sanding disk platen is mounted on one end of the drive spindle through a freely rotatable bearing disposed eccentrically with respect to the drive spindle. A sanding disk is disposed on a front surface of the platen. A resiliently biased brake is mounted in the housing and is adapted to bear against a low friction annular surface of the platen in a direction substantially parallel to the axis of the drive spindle. The drive spindle is arranged to rotate at between 10,000 and 15,000 rpm. Under no load, the brake permits rotation of the platen about its own axis up to about 750 rpm.
39 Citations
13 Claims
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1. Sanding apparatus comprising a housing a drive spindle arranged to rotate in the housing;
- a sanding disk platen mounted on one end of the drive spindle through a freely rotatable bearing disposed eccentrically with respect to the drive spindle, the platen having substantially flat, parallel front and rear surfaces lying substantially perpendicular to the spindle axis;
a sanding disk being adapted to be disposed on said front surface of the platen;
a low friction annular surface being disposed on said rear surface about said bearing; and
a resiliently biased finger brake being mounted in said housing and adapted to bear against said annular surface in a direction substantially parallel to said spindle axis, the brake comprising a body mounted on the housing, a finger slidable in the body, and a spring disposed between said body and a stem of said finger. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- a sanding disk platen mounted on one end of the drive spindle through a freely rotatable bearing disposed eccentrically with respect to the drive spindle, the platen having substantially flat, parallel front and rear surfaces lying substantially perpendicular to the spindle axis;
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8. A random orbit sander comprising:
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a housing; a drive spindle having a longitudinal axis and rotatably mounted in the housing; a sanding disc platen mounted on one end of the drive spindle; a freely rotatable bearing disposed eccentrically with respect to the drive spindle and rotatably supporting the platen; the platen having substantially flat, parallel front and rear surfaces lying substantially perpendicular to the spindle axis; the platen front surface adapted to receive a sanding disk; a low friction annular surface being disposed on the rear platen surface about the bearing; and a finger brake mounted in the housing and resiliently biased in a direction substantially parallel to the spindle axis into engagement with the annular surface, whereby the finger brake continuously slideably engages portions of the annular surface lying in a plane perpendicular to the spindle axis when the platen is rotatably driven. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification