US4742592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrofoil attachment for pool cleaning tool
Assignee: Individual
•
Filing: 1987-09-14
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Granted: 1988-05-10
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Expires: 2007-09-14
Abstract
Abstract A hydrofoil attaches to a long-handled swimming pool brush pole at a fixed angle that forces the brush against the pool wall on a forward stroke. It pulls the brush away from the wall on a reverse stroke. Forces between hydrofoil and brush and pole are distributed by multiple pole clamps and contact of foil edge against the head of the brush.
Inventors
- 👤 Thomas J. Addona, Sr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:12
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/14; E04H4/16; E04H4/1609
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
178 words
An attachment for increasing the efficiency of a swimming pool cleaning tool which has a long pole means attached to said tool for cleaning a pool surface at a distance from the operator, comprising: a. an angled hydrofoil for forcing said tool against said surface by hydrodynamic forces when said tool is moved away from said operator in a first, or scrubbing motion and for forcing said tool away from said surface in a second, or retrieval, motion; b. pole clamping means for clamping said attachment to said pole means; c. tool engaging means extending along an edge of said hydrofoil for applying the force generated by said first motion along an extended portion of said tool to apply said force uniformly to the cleaning action and to distribute the stresses more uniformly on said hydrofoil; and d. pole engaging means extending over an extensive area of said hydrofoil for applying the force generated by said first motion against said pole means to more uniformly apply said force and to distribute the stresses more uniformly on said hydrofoil.
Claim 2
Dependent Claim
178 words
An attachment for increasing the efficiency of a swimming pool cleaning tool which has a long pole means attached to said tool for cleaning a pool surface at a distance from the operator, comprising: a. an angled hydrofoil for forcing said tool against said surface by hydrodynamic forces when said tool is moved away from said operator in a first, or scrubbing motion and for forcing said tool away from said surface in a second, or retrieval, motion; b. pole clamping means for clamping said attachment to said pole means; c. tool engaging means extending along an edge of said hydrofoil for applying the force generated by said first motion along an extended portion of said tool to apply said force uniformly to the cleaning action and to distribute the stresses more uniformly on said hydrofoil; and d. pole engaging means extending over an extensive area of said hydrofoil for applying the force generated by said first motion against said pole means to more uniformly apply said force and to distribute the stresses more uniformly on said hydrofoil.
Claim 3
Dependent Claim
29 words
The clamping means of claim 1, including fastening means and smooth extensions extending beyond said fastening means to protect said pool surface from damage caused by said fastening means.
Claim 4
Dependent Claim
21 words
The clamping means of claim 1 having opposed, substantially V shapes to provide effective clamping to pole means of different diameters.
Claim 5
Dependent Claim
29 words
The attachment according to claim 1 in which said clamping means includes means for clamping said hydrofoil to said pole means at a fixed angle of approximately thirty-five degrees.
Claim 6
Dependent Claim
31 words
The attachment according to claim 1 in which said clamping means includes means for clamping said hydrofoil to said pole means at a fixed angle of between twenty-five and forty-five degrees.
Claim 7
Dependent Claim
18 words
The attachment according to claim 5 in which said angle remains unchanged in said first and second motions.
Claim 8
Dependent Claim
13 words
The attacment according to claim 1 in which said tool is a brush.
Claim 9
Dependent Claim
13 words
The attachment according to claim 1 in which said tool is a scraper.
Claim 10
Dependent Claim
19 words
The attachment according to claim 1 in which said hydrofoil is substantially a thin flat plane with no sides.
Claim 11
Dependent Claim
20 words
The attachment according to claim 1 in which said clamping means includes at least two separate, spaced apart clamping elements.
Claim 12
Dependent Claim
29 words
The attachment according to claim 1 in which said pole engaging means includes reinforcing rib means connecting said hydrofoil to said pole engaging means for further distribution of forces.
Claim 13
Dependent Claim
10 words
The attachment according to claim 1 molded from thermoplastic material.
Claim 14
Dependent Claim
27 words
The attachment according to claim 12 in which said thermoplastic is selected from the group including; nylon, polyvinylchloride; acrylonitrile butadiene styrene; high impact styrene; polyolefin; and polycarbonate.
Claim 15
Dependent Claim
12 words
The attachment according to claim 1 is formed from light weight metal.
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) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |