Patent US2951721A successfully refreshed from Google Patents.
US4530125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool cleaner component
Assignee: Zodiac Pool Systems LLC
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Filing: 1984-05-01
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Granted: 1985-07-23
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Expires: 2004-05-01
Abstract
Abstract A pressure pad disc for use around the inlet of vacuum suction swimming pool cleaners as described in U.S. Pat. Nos. 4,023,227 and 4,208,752. The disc has radial slots 3 extending from the edge of the disc across the majority of the radius to define separate segments to which independently of the remainder of the disc.
Inventors
- 👤 Helmut J. Hofmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:37
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/14; E04H4/16; E04H4/1654; E04H4/1663
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
In a swimming pool cleaner of the vacuum suction type having a body and a suction inlet, pressure pad means for enabling the cleaner to traverse relatively small radius transitions between horizontal and vertical surfaces without significant loss of vacuum, said pressure pad means comprising a circular disc (1) of flexible plastics sheet material, a central opening (2) defined in said disc for engaging around the suction inlet of the cleaner body, and a plurality of equally circumferentially spaced radial slots (3) having parallel sides and extending from an outer peripheral edge of the disc across a major portion of the radius thereof toward the central opening, said slots dividing the disc into an equal plurality of independently flexible segments capable of following pool wall transitions and curvatures.
Claim 2
Dependent Claim
128 words
In a swimming pool cleaner of the vacuum suction type having a body and a suction inlet, pressure pad means for enabling the cleaner to traverse relatively small radius transitions between horizontal and vertical surfaces without significant loss of vacuum, said pressure pad means comprising a circular disc (1) of flexible plastics sheet material, a central opening (2) defined in said disc for engaging around the suction inlet of the cleaner body, and a plurality of equally circumferentially spaced radial slots (3) having parallel sides and extending from an outer peripheral edge of the disc across a major portion of the radius thereof toward the central opening, said slots dividing the disc into an equal plurality of independently flexible segments capable of following pool wall transitions and curvatures.
Claim 3
Dependent Claim
19 words
A disc as claimed in claim 1 in which the slots divide the disc into at least three segments.
Claim 4
Dependent Claim
16 words
A disc as claimed in claim 1 in which the slots terminate in circular holes (4).
Claim 5
Dependent Claim
16 words
A disc as claimed in claim 2 in which the slots terminate in circular holes (4).
References Cited (Backward Citations)
US2339187A
Cited
US2527748A
Cited
US3619844A
Cited
US3939519A
Cited
US4133068A
Cited
GB2034431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |