Patent US4733427A successfully refreshed from Google Patents.
US4733427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater brush
Assignee: Individual
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Filing: 1986-06-10
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Granted: 1988-03-29
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Expires: 2006-06-10
Abstract
Abstract The present invention provides an improved brush for cleaning underwater surfaces, such as swimming pool walls and bottoms, and uses a hinged wing that presents an inclined plane to the water when the brush is moved in its downward stroke. The wing thus acts to exert a desired force upon the brush which urges the brush against the surface being cleaned. On the return stroke of the brush, the hinged wing is caused to move to a position trailing the brush, where it avoids urging the brush back into contact with the surface that was just cleaned on the downward stroke. Rather, this trailing position helps to keep the brush off of the cleaned surface, and creates little or no drag for the return stroke.
Inventors
- 👤 Richard H. Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:04
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/14; E04H4/16; E04H4/1609; A; A46; A46B; A46B15/00; A46B2200/00; A46B2200/30; A46B2200/302; A46B2200/3073
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
An underwater brush device comprising: a brush including a handle for cleaning an underwater surface; and a pivotable wing means attached to said brush for exerting a force on said brush in the direction of said surface to be cleaned when said brush is moved through the water in a first direction, and pivoting to exert no such force and not urge said brush in any direction when said brush is moved in the opposite direction, a stop means for preventing further wing pivot, so that when said brush is moved in said first direction, said wing means pivots until prevented from further pivoting by said stop means, and buoyancy means, so that when said brush is generally stationary in the water, said buoyancy means acts to orient said wing generally above said brush.
Claim 2
Dependent Claim
134 words
An underwater brush device comprising: a brush including a handle for cleaning an underwater surface; and a pivotable wing means attached to said brush for exerting a force on said brush in the direction of said surface to be cleaned when said brush is moved through the water in a first direction, and pivoting to exert no such force and not urge said brush in any direction when said brush is moved in the opposite direction, a stop means for preventing further wing pivot, so that when said brush is moved in said first direction, said wing means pivots until prevented from further pivoting by said stop means, and buoyancy means, so that when said brush is generally stationary in the water, said buoyancy means acts to orient said wing generally above said brush.
Claim 3
Dependent Claim
26 words
The underwater brush device of claim 1 wherein said stop means and said buoyancy means comprise a buoyant piece of material attached to said pivotable wing.
Claim 4
Dependent Claim
23 words
The underwater brush device of claim 2 wherein said pivotable wing is attached to and pivots about said brush by a hinge means.
Claim 5
Dependent Claim
145 words
A brush attachment comprising: a pivotable wing member conditioned to attach to a brush by hinge means so that when said brush is moved through a fluid in a first direction, said wing reacts to such movement by pivoting to a position in which it urges said brush in a direction generally perpendicular to said first direction, and when said brush is moved through the fluid in the direction opposite said first direction, said wing reacts to such movement by pivoting to trail behind said brush, and not urge it in any direction, wherein a stop mechanism is included to limit the pivoting of said wing when said brush is moved through the fluid in the first direction, and including buoyancy means, so that when said brush is generally stationary in the water, said buoyancy means acts to orient said wing generally above said brush.
Claim 6
Dependent Claim
145 words
A brush attachment comprising: a pivotable wing member conditioned to attach to a brush by hinge means so that when said brush is moved through a fluid in a first direction, said wing reacts to such movement by pivoting to a position in which it urges said brush in a direction generally perpendicular to said first direction, and when said brush is moved through the fluid in the direction opposite said first direction, said wing reacts to such movement by pivoting to trail behind said brush, and not urge it in any direction, wherein a stop mechanism is included to limit the pivoting of said wing when said brush is moved through the fluid in the first direction, and including buoyancy means, so that when said brush is generally stationary in the water, said buoyancy means acts to orient said wing generally above said brush.
References Cited (Backward Citations)
GB584029A
Cited
US3010420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |