US3711261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary abrasive device
Assignee: MERIT ABRASIVE PROD Inc
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Filing: 1971-04-09
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Granted: 1973-01-16
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Expires: 1991-04-09
Abstract
Abstract A rotary abrasive device in which abrasive units are replaceably mounted on a powered mandrel, the units including retainer members insertable endwise into grooves in the mandrel; the configuration and relationship of the retainer members and peripheral openings of the grooves, and attachment of the retainers to abrasive packs with a spacing between the base edges of the packs and the surface of the mandrel, affording a limited pivotal movement of the retainer members and packs.
Inventors
- 👤 R Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:07
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/14; B24D13/02; B24D13/06; B24D13/16; B24D13/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
30 words
A device as defined in claim 1 in which the grooves have the general form of dovetail slots, and the enlargements of the retainer are generally annular in cross section.
Claim 2
Dependent Claim
30 words
A device as defined in claim 1 in which the grooves have an interrupted annular cross sectional form, and the enlargements of the retainer are generally annular in cross section.
Claim 3
Dependent Claim
35 words
A device as defined in claim 2 in which the radial depth of the grooves is greater than the radial dimension of the enlargements whereby space for circulation of air through the grooves is provided.
Claim 4
Dependent Claim
33 words
A device as defined in claim 3 in which the diameter of the grooves is greater than the diameter of the enlargements whereby space for circulation of air through the grooves is provided.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |