# US 4,398,551 A · Hydraulic surface cleaning apparatus

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- Number: US 4,398,551 A
- Document ID: US4398551A
- Status: Granted
- Kind: A
- Application number: 06/288,527
- Filed: 1981-07-30
- Granted: 1983-08-16
- Earliest claimed: 1981-07-30
- Assignees: Comar, Inc.
- Inventors: Robert M. Moorehead
- Web page: https://patentgrep.com/patent/US4398551A

## CPC

- E01H 12/006: {Oil removal}
- E01H 1/103: {in which the soiled loosening or washing liquid is removed, e.g. by suction (removing liquids in general E01H1/108)}
- E01H: STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING {OR PREVENTING} FOG IN GENERAL {CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS}(cleaning in general B08B)

## Abstract

A beach or other surface cleaning method and apparatus is disclosed, wherein low density debris, particularly oil and tar residues, are removed for subsequent separation and disposal. The apparatus employs hydraulic principles to float the debris from the surface, propel the floated debris into a scoop, and lift the floated debris into a receiving trough for subsequent separation. Water employed to provide the hydraulic actions may be recirculated for continuous reuse.

## Claims

### Claim 1

Beach cleaning apparatus comprising; a scoop member including
a bottom plate inclined upwardly from a leading edge of said bottom plate with the trailing edge of said bottom plate terminating in a downwardly disposed trough member,
means for positioning said bottom plate leading edge into juxtaposition with a planar surface to be cleaned,
means for directing a low-velocity water stream at a predetermined acute angle from said planar surface to be cleaned and toward said bottom plate leading edge to impact said planar surface at a predetermined impact point space-separated from said bottom plate leading edge,
means for directing a high-velocity water stream at a predetermined acute angle from said planar surface to be cleaned and toward said bottom plate to an impact point substantially coincident with said bottom plate leading edge, and
means for translating said scoop member in a direction opposite that toward which said water streams are directed and with respect to said surface to be cleaned.

### Claim 2 (depends on 1)

The apparatus of claim 1 wherein said low and high velocity water streams emanate from nozzle means mounted in fixed relationship to said scoop member.

### Claim 3 (depends on 2)

The apparatus of claim 2 wherein said scoop member has a predetermined dimension transverse to the direction in which it is propelled, with each said nozzle means comprising means to direct a sheet-like water stream extending across said predetermined transverse dimension of said scoop member.

### Claim 4 (depends on 3)

The apparatus of claim 3, wherein each said nozzle means comprises a plurality of space separated nozzle orifices each communicating with a pressurized water source.

### Claim 5 (depends on 3)

The apparatus of claim 3, with disposal means associated with said trough member to remove the content thereof.

### Claim 6 (depends on 5)

The apparatus of claim 5, wherein said disposal means comprises outlet port means communicating with said trough member, a screening member affixed within said trough member through which predetermined trough contents are passed to said outlet port means, and means connected to said outlet port to receive the screened trough member contents.

### Claim 7 (depends on 6)

The apparatus of claim 6, wherein said outlet port is inputted to a pump means through which the screened content of said trough member is pumped to a separation container, outlet means communicating with the water content of said separation container, and further pump means disposed between said separation container outlet means and said nozzle means to supply pressurized water to said nozzle means.

### Claim 8 (depends on 7)

The apparatus of claim 7, further including a make-up water container means interposed between the water outlet of said separation container and the input of said further pump means, whereby the water content of said make-up water container means is recirculated through said nozzle means.

### Claim 9 (depends on 8)

The apparatus of claim 8, wherein said trough member is provided with disposal access means from which that portion of the trough content which is precluded from passing through said screening member may be disposed.