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US 5,174,795 AGranted
Flexible abrasive pad with ramp edge surface
OwnerRonald C. Wiandinventor
Life of this patent
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Abstract
A one-piece abrasive sheet and method of manufacture. The abrasive pad has a planar sheet portion with a plurality abrasive protrusion extending therefrom. The protrusions are intimately molded with the planar sheet portion to form a one-piece sheet. Thermoplastic and abrasive grit mixture may be used to form the sheet. The resulting pad has improved durability. Also disclosed is an improved circumferentially outer lip structure with a ramp surface for improving performance of the pad over irregular surfaces or surfaces with edges or steps or the like.
Claims4
An abrasive pad comprising:
- an abrasive pad having a front abrasive side and a back side, said abrasive pad adapted for attachment to a mandrel of a polishing tool, said abrasive pad having an abrasive working surface including an abrasive grit material for abrading of a work surface, said abrasive working surface defining a planar working surface on said pad, said pad having an outer circumference, said pad being flexible at least at about its outer circumference;
- a lip portion extending from said outer circumference, said lip portion including a radially inner edge and radially outer edge;
- and
- a ramp surface formed about an outer periphery of said pad between said radially inner edge and said radially outer edge for assisting in traversing edges of a work surface encountered during use of said abrasive pad.
1 more element
Dependencies are inferred from the claim text.