US3928947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressurized water powered sanding device
Assignee: Individual
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Filing: 1974-02-08
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Granted: 1975-12-30
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Expires: 1994-02-08
Abstract
Abstract A pressurized water powered sanding device intended primarily for the cleaning of swimming pools, and comprising a supply of water under pressure, such as a pump, to the high pressure side of which a conduit is connected. This conduit extends to a water powered motor of the positive displacement type which is mounted in a suitable body. A hand operated control valve is included in this conduit to regulate the pressure and/or quantity of water delivered to the motor. A drive shaft depends vertically from the motor and drivably connected to the lower end thereof is a cleaning device such as a sander which is driven with an orbital, oscillatory or rotary motion. A skirt is adjustably mounted on the body and encloses the space below the body about the cleaning element. This skirt is formed with an outlet port to which a conduit extends to the low pressure side of a pump to provide a so-called vacuum condition within the skirt which causes the water therewithin to be at a pressure lower than that of ambient water. A control valve is included in this conduit and the adjustment thereof, together with adjusting the gap between the lower edge of the skirt and the surface to be cleaned, affords accurate control of the low pressure condition within the skirt. A manual handle has one end connected to the body.
Inventors
- 👤 Dennis A Millett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:48
CPC Classifications
B; B24; B24B; B24B23/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
289 words
In apparatus for cleaning swimming pool surfaces while said surfaces are under water, a. a body presenting a peripheral surface and a bottom surface; b. a water powered motor carried by said body and having a water inlet and a water outlet; c. a pump having a low pressure side and a high pressure side provided by said pump; d. a flexible conduit having one end connected to said pump at the high pressure side thereof, with the other end of said conduit being connected to the water inlet of said motor; e. a skirt mounted on said body, depending below said bottom surface thereof and presenting an edge which is spaced from a swimming pool surface a slight distance to provide a narrow gap between said edge and said pool surface; f. a drive shaft having one end operatively connected to said motor by which it is driven and extending beyond said bottom surface of the body substantially to the plane of said skirt edge; g. a cleaning element; h. mechanism drivably connecting said cleaning element to said drive shaft at the end of the latter remote from said motor; i. a water outlet in said skirt; j. a source of low pressure; k. a flexible conduit having one end connected to said source of low pressure, with its other end being connected to the water outlet of said skirt, and l. a handle connected to said body, whereby a low pressure is created in the water within said skirt as compared to the pressure of ambient water as water is supplied therefrom through said outlet, and ambient water is drawn through said gap and entrains particles removed from the pool surface being cleaned by said cleaning element.
Claim 2
Dependent Claim
289 words
In apparatus for cleaning swimming pool surfaces while said surfaces are under water, a. a body presenting a peripheral surface and a bottom surface; b. a water powered motor carried by said body and having a water inlet and a water outlet; c. a pump having a low pressure side and a high pressure side provided by said pump; d. a flexible conduit having one end connected to said pump at the high pressure side thereof, with the other end of said conduit being connected to the water inlet of said motor; e. a skirt mounted on said body, depending below said bottom surface thereof and presenting an edge which is spaced from a swimming pool surface a slight distance to provide a narrow gap between said edge and said pool surface; f. a drive shaft having one end operatively connected to said motor by which it is driven and extending beyond said bottom surface of the body substantially to the plane of said skirt edge; g. a cleaning element; h. mechanism drivably connecting said cleaning element to said drive shaft at the end of the latter remote from said motor; i. a water outlet in said skirt; j. a source of low pressure; k. a flexible conduit having one end connected to said source of low pressure, with its other end being connected to the water outlet of said skirt, and l. a handle connected to said body, whereby a low pressure is created in the water within said skirt as compared to the pressure of ambient water as water is supplied therefrom through said outlet, and ambient water is drawn through said gap and entrains particles removed from the pool surface being cleaned by said cleaning element.
Claim 3
Dependent Claim
32 words
The apparatus of claim 1, together with means to adjust the skirt relative to the body and thereby adjust the gap between the edge of the skirt and the surface being cleaned.
Claim 4
Dependent Claim
50 words
The apparatus of claim 2 in which said body is circular, said peripheral surface is cylindrical and said skirt includes a cylindrical portion that is clamped to the cylindrical surface of said body and a conical portion presenting the edge which cooperates with the pool surface in providing said gap.
Claim 5
Dependent Claim
16 words
The apparatus of claim 1 in which the cleaning element takes the form of a sander.
Claim 6
Dependent Claim
36 words
The apparatus of claim 1 in which the cleaning element is circular and the mechanism which drivably connects the cleaning element to the drive shaft includes means for imparting a rotary motion to the cleaning element.
Claim 7
Dependent Claim
29 words
The apparatus of claim 1 in which the mechanism which drivably connects the cleaning element to the drive shaft includes means for imparting oscillatory motion to the cleaning element.
Claim 8
Dependent Claim
29 words
The apparatus of claim 1 in which the mechanism which drivably connects the cleaning element to the drive shaft iNcludes means to impart ortibal motion to the cleaning element.
Claim 9
Dependent Claim
16 words
The apparatus of claim 1 in which the water powered motor is a positive displacement motor.
Claim 10
Dependent Claim
27 words
The apparatus of claim 1, together with a control valve included in the conduit from the high pressure side of said pump to said water powered motor.
Claim 11
Dependent Claim
25 words
The apparatus of claim 1, together with a control valve in the conduit between the source of low pressure and the outlet of said skirt.
Claim 12
Dependent Claim
20 words
The apparatus of claim 1 in which the source of low pressure is the low pressure side of said pump.
Claim 13
Dependent Claim
40 words
The apparatus of claim 9 in which the valve which controls the flow of water to said motor has an operating arm that is pivotally mounted in said body, together with means for holding said arm in an adjusted position.
Claim 14
Dependent Claim
13 words
The apparatus of claim 6 in which the sander is rectangular in shape.
Claim 15
Dependent Claim
13 words
The apparatus of claim 7 in which the sander is rectangular in shape.
Claim 16
Dependent Claim
25 words
The apparatus of claim 9, together with a control valve in the conduit between the source of low pressure and the outlet of the skirt.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |