US3844072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Replaceable resilient pad assembly for abrasive finishing articles
Assignee: 3M Co
•
Filing: 1973-01-05
•
Granted: 1974-10-29
•
Expires: 1993-01-05
Abstract
Abstract A throwaway resilient pad assembly formed of a body of resilient material having first and second side faces. The side faces are such that a plurality of abrasive finishing members can be adhered sucessively thereto. A disc-like member having a central opening is formed in the body of resilient material. The pad assembly is removably coupled to a drive member at the central opening of the disc-like member. The drive member may then be affixed to a power tool for imparting movement to the resilient pad assembly and finishing members. The faces of the resilient member may be constructed of a cloth material to which the finishing member is adhered. A drive shaft can be attached to the disc-like member at the central opening.
Inventors
- 👤 J Mackay
- 👤 J Haigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:52
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
187 words
A reversible symetrically formed replaceable pad assembly comprising: a body of resilient material having a central opening therein, said body having a disc-like member formed therein, said disclike member radially extending into said body and having a central opening formed therein, said disc-like member central opening being smaller than said body central opening, an axially central portion of said disc-like member thereby extending into said body opening and having a thickness thereat greater than remaining portions of said disc-like member but less than the thickness of said body thereat, said openings being co-axial with each other, said body having a first side face and a second side face; means formed on said faces for securing an abrasive finishing article to either one of said faces; drive means; and securing means positioned in said openings for securing said assembly to said drive means for imparting movement to said assembly, said securing means having an outer flange smaller than said body opening for abutting said axial central portion of said disc-like member and being Operable when inserted into said opening from either of said said faces and secured therein.
Claim 2
Dependent Claim
187 words
A reversible symetrically formed replaceable pad assembly comprising: a body of resilient material having a central opening therein, said body having a disc-like member formed therein, said disclike member radially extending into said body and having a central opening formed therein, said disc-like member central opening being smaller than said body central opening, an axially central portion of said disc-like member thereby extending into said body opening and having a thickness thereat greater than remaining portions of said disc-like member but less than the thickness of said body thereat, said openings being co-axial with each other, said body having a first side face and a second side face; means formed on said faces for securing an abrasive finishing article to either one of said faces; drive means; and securing means positioned in said openings for securing said assembly to said drive means for imparting movement to said assembly, said securing means having an outer flange smaller than said body opening for abutting said axial central portion of said disc-like member and being Operable when inserted into said opening from either of said said faces and secured therein.
Claim 3
Dependent Claim
27 words
A reversible replaceable pad assembly in accordance with claim 1 wherein said first means comprises a cloth face material to which said abrasive finishing article is secured.
Claim 4
Dependent Claim
31 words
A reversible replaceable pad assembly in accordance with claim 1 wherein said disc-like member extends near to the edge of said resilient member for preventing structural failure of said resilient member.
Claim 5
Dependent Claim
22 words
A reversible replaceable pad assembly in accordance with claim 3 wherein said layers of resilient material are made of a sponge-like material.
Claim 6
Dependent Claim
32 words
A reversible replaceable pad assembly in accordance with claim 1 wherein said body of resilient material is formed of plastic foam which is molded to said disc-like member on both sides thereof.
Claim 7
Dependent Claim
35 words
A reversible replaceable pad assembly in accordance with claim 5 wherein said disc-like member tapers from a maximum cross-sectional thickness adjacent said central opening to a minimum thickness adjacent the edge of said plastic foam.
Claim 8
Dependent Claim
16 words
A reversible replaceable pad assembly in accordance with claim 6 wherein said central opening is threaded.
References Cited (Backward Citations)
US351737A
Cited
US1687071A
Cited
US1779682A
Cited
US2370323A
Cited
US2644280A
Cited
US2605592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |