Patent US3959838A successfully refreshed from Google Patents.
US3959838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater cleaning
Assignee: Individual
•
Filing: 1974-02-28
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Granted: 1976-06-01
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Expires: 1994-02-28
Abstract
Abstract An underwater surface cleaning apparatus particularly suitable for swimming pools which includes brushes driven by suction of water from immediately around the apparatus through a vane type motor which is coupled to rotate the brush. The motor can include hinged vanes.
Inventors
- 👤 Harvey John Hannah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:08
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/14; E04H4/16; E04H4/1618
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
206 words
An underwater surface cleaning apparatus for swimming pools including a body adapted to be drawn across a surface to be cleaned, a brush rotatably supported with respect to the body so as to engage against a surface of the swimming pool, a water operable motor adapted to operate by reason of water drawn from that surrounding the apparatus and sucked through the motor whereby to effect rotation of the drive shaft of the motor, the drive shaft being coupled to the brush to effect the rotation of the brush and effect a cleaning action on the engaged underwater surface, the motor including a rotor and a housing, the rotor being within the housing and having vanes acting therebetween and following the rotor, an inlet port and an outlet port being formed in the housing and the vanes being caused by engagement with the housing to adapt a sealing engagement between the rotor and the housing and also being caused by engagement with a guiding track within the housing to take an extended position when moving between the inlet port and the said outlet port, and being caused to take a collapsed position when moving from a position adjacent said outlet port to adjacent said inlet port.
Claim 2
Dependent Claim
206 words
An underwater surface cleaning apparatus for swimming pools including a body adapted to be drawn across a surface to be cleaned, a brush rotatably supported with respect to the body so as to engage against a surface of the swimming pool, a water operable motor adapted to operate by reason of water drawn from that surrounding the apparatus and sucked through the motor whereby to effect rotation of the drive shaft of the motor, the drive shaft being coupled to the brush to effect the rotation of the brush and effect a cleaning action on the engaged underwater surface, the motor including a rotor and a housing, the rotor being within the housing and having vanes acting therebetween and following the rotor, an inlet port and an outlet port being formed in the housing and the vanes being caused by engagement with the housing to adapt a sealing engagement between the rotor and the housing and also being caused by engagement with a guiding track within the housing to take an extended position when moving between the inlet port and the said outlet port, and being caused to take a collapsed position when moving from a position adjacent said outlet port to adjacent said inlet port.
Claim 3
Dependent Claim
44 words
An underwater surface cleaning apparatus as in claim 1, where the radially inner ends of said vanes are pivotally secured to said rotor, and pin means on the radially outer ends of said vanes slidably engage said guiding track that is on said housing.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |