US3722022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating paint scraper
Assignee: Individual
•
Filing: 1971-09-15
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Granted: 1973-03-27
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Expires: 1991-09-15
Abstract
Abstract Apparatus for removing an outer surface such as a coating of paint from a masonry base includes a rotatable, resilient disc having a support stem extending from one side of the disc, and a set of elongated members extending from the other side. To use the apparatus, the stem is secured in the chuck of a portable power drill, and the disc is rotated and positioned so that the free ends of the elongated members scrape the outer surface from the base.
Inventors
- 👤 J Falleson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:17
CPC Classifications
A; A47; A47L; A47L13/00; A47L13/02; B; B44; B44D; B44D3/00; B44D3/16; B44D3/162; Y; Y10; Y10T; Y10T29/00; Y10T29/45; Y10T29/4528; Y10T29/4561
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
176 words
Apparatus for removing paint or the like from a painted surface of predefined contour, said apparatus comprising: a resilient disc; a stem rigidly coupled with said disc and extending perpendicularly outward from the central portion of one of the planar surfaces of said disc, said stem being structured to be engaged by the chuck of a power drill, whereby a rotational movement of said disc is imparted during rotation of the chuck of such drill; and a plurality of elongated members rigidly coupled to said disc and extending perpendicularly outward from the other planar surface of said disc, the free ends of said members defining a set of generally coplanar scraping surfaces which are positioned adjacent the painted surface During rotation of said disc to remove paint from the surface, said members having a circular cross section taken in a plane parallel to the planar surfaces of said disc and having a spiral groove formed in the curved surface thereof, thereby providing the free end of said members with a burred, self-sharpening edge regardless of wear.
Claim 2
Dependent Claim
176 words
Apparatus for removing paint or the like from a painted surface of predefined contour, said apparatus comprising: a resilient disc; a stem rigidly coupled with said disc and extending perpendicularly outward from the central portion of one of the planar surfaces of said disc, said stem being structured to be engaged by the chuck of a power drill, whereby a rotational movement of said disc is imparted during rotation of the chuck of such drill; and a plurality of elongated members rigidly coupled to said disc and extending perpendicularly outward from the other planar surface of said disc, the free ends of said members defining a set of generally coplanar scraping surfaces which are positioned adjacent the painted surface During rotation of said disc to remove paint from the surface, said members having a circular cross section taken in a plane parallel to the planar surfaces of said disc and having a spiral groove formed in the curved surface thereof, thereby providing the free end of said members with a burred, self-sharpening edge regardless of wear.
Claim 3
Dependent Claim
11 words
The invention according to claim 1 wherein said members comprise screws.
Claim 4
Dependent Claim
12 words
The invention according to claim 2 wherein said screws are machine screws.
Claim 5
Dependent Claim
28 words
The invention according to claim 1 wherein said elongated members are adjustable relative to said disc whereby the spacing between said disc and said coplanar surfaces is adjustable.
Claim 6
Dependent Claim
14 words
The invention according to claim 1 wherein said disc comprises neoprene or its equivalent.
Claim 7
Dependent Claim
42 words
The invention according to claim 1 wherein said disc has a plurality of holes therein for receiving said elongated members, and said apparatus further comprises means for fixing the position of said elongated members relative to the longitudinal axes of said holes.
Claim 8
Dependent Claim
43 words
The invention according to claim 1 wherein said elongated members are arranged to form a plurality of equilateral triangles of varying sizes, the centers of said triangles coinciding with the center of said disc, whereby said disc is dynamically balanced during rotation thereof.
Claim 9
Dependent Claim
23 words
The invention according to claim 1 wherein said disc is a molded product and said elongated members are mold inserts in said disc.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |