Patent US3931931A successfully refreshed from Google Patents.
US3931931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface washer
Assignee: Individual
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Filing: 1975-02-20
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Granted: 1976-01-13
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Expires: 1995-02-20
Abstract
Abstract A surface washer has a horizontal pipe member fitted with spaced nozzles and rotably attached at each end to a support movable on casters in all directions. At least three casters are employed to obtain a horizontally stable support and preferably four, with two casters supporting each end of the horizontal pipe. A hollow handle is attached to and communicates interiorly with the pipe member at one of its ends, the other end being fitted with a water hose connection. Preferably each caster is pivoted on a shaft in a common bearing, and which has a head rotatable in a closed socket.
Inventors
- 👤 George A. Otis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:48
CPC Classifications
B; B08; B08B; B08B3/00; B08B3/02; B08B3/024; B05; B05B; B05B1/00; B05B1/14; B05B1/20; B05B1/202; B05B15/00; B05B15/60; B05B15/62
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
156 words
A surface washer comprising a horizontal pipe fitted with a plurality of spaced apart nozzles, casters for moving said pipe over a surface to be washed, a hollow handle attached to said pipe for rotating said nozzles at various angles to said surface and for supplying water under elevated pressure to the interior of said pipe; in which the improvement comprises: a. said horizontal pipe being supported by a plurality of at least three casters to obtain a horizontally stable support, a caster assembly comprising at least one caster supporting each end of said pipe; and, b. said horizontal pipe being rotatably attached to said caster assembly supporting each of its ends by a link having one of its ends fixedly attached to one of said caster assembly and said end of said horizontal pipe, and having its other end rotatably attached to the other of said caster assembly and said end of said horizontal pipe.
Claim 2
Dependent Claim
156 words
A surface washer comprising a horizontal pipe fitted with a plurality of spaced apart nozzles, casters for moving said pipe over a surface to be washed, a hollow handle attached to said pipe for rotating said nozzles at various angles to said surface and for supplying water under elevated pressure to the interior of said pipe; in which the improvement comprises: a. said horizontal pipe being supported by a plurality of at least three casters to obtain a horizontally stable support, a caster assembly comprising at least one caster supporting each end of said pipe; and, b. said horizontal pipe being rotatably attached to said caster assembly supporting each of its ends by a link having one of its ends fixedly attached to one of said caster assembly and said end of said horizontal pipe, and having its other end rotatably attached to the other of said caster assembly and said end of said horizontal pipe.
Claim 3
Dependent Claim
29 words
A surface washer according to claim 1 in which each end of said pipe is supported by a caster assembly comprising two casters spaced apart from front to back.
Claim 4
Dependent Claim
36 words
A surface washer according to claim 2 in which said caster assemblies each comprise a frame, said frames having rear parallel sides each carrying one caster and outwardly angled front side portions each carrying one caster.
Claim 5
Dependent Claim
37 words
A surface washer according to claim 3 in which each of said links has one end fixedly attached to one end of said pipe and the other end rotatably attached to one of said caster assembly frames.
Claim 6
Dependent Claim
30 words
A surface washer according to claim 4 in which a stop is arranged on each of said frames to limit rotation of said links with respect to said caster assemblies.
Claim 7
Dependent Claim
39 words
A surface washer according to claim 5 in which said stops are placed above and forward of the attachment of said links to said frames to maintain said handle in stable upright position when rotated upward past dead center.
Claim 8
Dependent Claim
33 words
A surface washer according to claim 1 in which each of said casters is pivoted on a shaft mounted in a common bearing, said shaft having a head rotatable in a closed socket.
Claim 9
Dependent Claim
31 words
A surface washer according to claim 7 in which the said shaft on which each of said casters is mounted has a generally hemispherical top rotatable in a closed mating socket.
Claim 10
Dependent Claim
85 words
A surface washer according to claim 1 in which said hollow handle is attached to said pipe by a collar having a base with an open top and a closed bottom having a tapered seat, the lower portion of said hollow handle passing through said base with its bottom mating with said seat, the hollow handle being held firmly in place at its passage through the open top of said base by at least one set screw threaded through an upper portion of said collar.
Claim 11
Dependent Claim
31 words
A surface washer according to claim 9 in which a pair of set screws are threaded through an upper portion of said collar to hold said hollow handle firmly in place.
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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |