Title: Abrasive article

Abstract: An abrasive article such as a cup-shaped grinding wheel is provided, said grinding wheel having a cup-shaped support member of a cross-section providing an annular support surface to which is secured an annular abrasive member consisting of an annular polyimide resin-bonded diamond abrasive member and an annular back-up member of abradable porous polyimide secured to the inside surface of the annular polyimide bonded diamond abrasive member; the porous polyimide back-up member wears away in use and therefore obviates the need for dressing the grinding wheel.

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Inventors: Wood, Everitt Franklin (West Chester, PA, US)

Application Number: 590495
Filing Date: 1975-06-26
Publication_date: 1977-01-11
Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE)
Primary Class(es): 451/548 51/298
Other Classes:
US Patent Ref:

2734812	Feb, 1956	Robie	51/298.
3117400	Jan, 1964	Martin	51/209.
3179631	Apr, 1965	Endrey	51/298.
3261811	Jul, 1966	Tatum	51/298.
3329488	Jul, 1967	Cofran	51/296.
3377411	Apr, 1968	Charvat	51/298.
3383191	May, 1968	Thomas	51/298.
3385684	May, 1968	Voter	51/298.
3523773	Aug, 1970	Sears	51/298.
3718447	Feb, 1973	Hibbs	51/298.
3883452	May, 1975	Scheverlein et al.	51/298.

Other Refs:
Primary Examiner: Smith, Al Lawrence
Assistant Examiner: Ramsey, K. J.
Attorney: