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US3151348A - Device for cleaning roadways and similar surfaces - Google Patents

Device for cleaning roadways and similar surfaces Download PDF

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Publication number
US3151348A
US3151348A US171332A US17133262A US3151348A US 3151348 A US3151348 A US 3151348A US 171332 A US171332 A US 171332A US 17133262 A US17133262 A US 17133262A US 3151348 A US3151348 A US 3151348A
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Prior art keywords
ground
water
nozzle means
source
collector
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US171332A
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Maasberg Wolfgang
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Woma Apparatebau Wolfgang Maasberg and Co GmbH
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Woma Appbau Wolfgang Maasberg
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Priority claimed from DEM47884A external-priority patent/DE1144310B/en
Application filed by Woma Appbau Wolfgang Maasberg filed Critical Woma Appbau Wolfgang Maasberg
Priority to US171332A priority Critical patent/US3151348A/en
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/10—Hydraulically loosening or dislodging undesirable matter; Raking or scraping apparatus ; Removing liquids or semi-liquids e.g., absorbing water, sliding-off mud
    • E01H1/101—Hydraulic loosening or dislodging, combined or not with mechanical loosening or dislodging, e.g. road washing machines with brushes or wipers
    • E01H1/103—Hydraulic loosening or dislodging, combined or not with mechanical loosening or dislodging, e.g. road washing machines with brushes or wipers in which the soiled loosening or washing liquid is removed, e.g. by suction
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces

Definitions

  • the present invention relates to the cleaning of roadways (e.g. prior to final surfacing), factory floors and similar surfaces.
  • this object may be realized by means of a water spray directed at high pressure, suitably of the order of 50-100 atmospheres, onto the surface to be cleaned at an angle of attack which should be between about 25-40 preferably near 30.
  • the Water spray reflected from the surface to be cleaned is caught and recirculated after the entrained dust and dirt particles have settled out.
  • the power needed for recirculating the water so purified may be obtained, in a preferred embodiment, from the engine of an automotive vehicle to which the spray and catch means have been attached.
  • These spray and catch means may include a battery of nozzles and a generally horizontal collector comprising a trough and a hood, the latter being open toward the array of nozzles and so positioned as to intercept the reflected streams from these nozzles.
  • the hood may be of progressively increasing height, the narrow end of the hood being positioned relatively close to the sprayer while its wider end is relatively remote therefrom.
  • the collector is then advantageously positioned at an acute angle to the direction of vehicular motion and may conveniently be equipped with a surface-contacting blade adapted to sweep aside any larger objects in the path of the machine.
  • the sprayer itself may extend at right angles to the direction of motion or, if desired, may be arranged substantially mirror-symmetrically to the collector with reference to a vertical plane perpendicular to that direction.
  • FIG. 1 is a side-elevational view of an automotive vehicle equipped with a street-cleaning attachment according to the invention
  • FIG. 2 is a top-plan view of the vehicle of FIG. 1;
  • FIG. 3 is an elevational view of the front portion of a vehicle with a slightly modified attachment.
  • a sanitation truck 4 with engine 5, front wheels 6a, rear wheels 6b and drivers cab 7.
  • the truck 4 carries a water reservoir 8, a settling tank 9 and means, including a high-pressure pump 3 and a suction pump 13, for circulating water from the reservoir 8 to a manifold tube 1 and returning it from a collecting trough 12 to the settling tank 9.
  • Manifold 1 is provided with a series of horizontally arrayed nozzles 2 adapted to create flat, fan-shaped sprays 10; these sprays are directed at an angle of approximately toward the ground surface 11 and are reflected therefrom at a somewhat lesser angle, the trough 12 with its hood 15 being so positioned as to intercept the reflected sprays 10a.
  • the pump 3 generates a pressure of approximately 50 to atmospheres and has an inlet pipe 16 terminating at a screened intake 17 within the tank 9, this intake being advantageously provided with suitable filter means not shown.
  • the discharge pipe 18 of pump 3 includes a valve 19" and opens into the tank 8 from which a conduit 19 leads into manifold 1.
  • a return pipe 14 extends from the bottom of trough 12 toward the pump 13 which delivers the collected spray water to the tank 9. Pumps 3 and 13 may be driven from the engine 5 via suitable transmission means not shown.
  • the collector 12, 15 is suspended from the hood of the engine by a pair of braces 20, 21 and is shown provided at its bottom with a blade 22 which scrapes the roadway 11 to turn aside large pebbles and other matter liable to obstruct the water circulation if swept up by the spray.
  • the manifold 1 with its nozzles 2 extends transversely across the path of the vehicle 4, at substantially the level of the wheel hubs which may be approximately 40 to 50 cm. above ground, whereas in FIG. 3 it has been illustrated in an oblique horizontal position substantially mirror-symmetrical to that of the collector.
  • the hood overlying the trough 12' has been shown composed of a plurality of generally horizontal metal strips 15.
  • both the trough 12 or 12 and the manifold tube 1 have been depicted as substantially horizontal, they could also be slightly inclined so long as their relative position is such as to insure the interception of most of the reflected spray water by the hood of the collector.
  • substantially all the water can be returned to the system for recirculation and no puddles are left on the surface and that only 1 to 2.5 liters of water are needed for each square meter of surface to be cleaned.
  • the apparatus described is, therefore, also well suited for the scrubbing of factory floors, large patios and similar areas.
  • the attachment comprising the sprayer 1 and the collector 12, 15 or 12, 15 may also be secured to the rear end of the truck 4 or to either end of some other type of vehicle, e.g. a trailer or a handcart without engine.
  • some other type of vehicle e.g. a trailer or a handcart without engine.
  • a street-cleaning attachment for a vehicle having an engine comprising nozzle means above the ground, said nozzle means being trained at an angle of attack of about 25 to 45 toward the ground, a source of water connected to said nozzle means, said source having an outlet pressure sutlicient to cause reflectionof a spray from said nozzle means from the ground, collector means forwardly of said nozzle means for intercepting at least part of the reflected spray Water, and a recirculation sys tem for purifying the intercepted water and returning it to said source, said nozzle means comprising a generally horizontal manifold tube with an array of spray nozzles longitudinally disposed thereon, said collector means having one end relatively close to said tube and another end relatively remote from said tube.
  • collector means comprises a generally horizontal trough provided with a hood open toward said manifold tube, said hood increasing progressively in height from said one end to said other end.
  • a street-cleaning attachment for a vehicle having an engine comprising horizontally extending, elongated nozzle means above the ground transverse to the direction of movement of the vehicle, said nozzle means being trained at an angle of attack of about 25 to 45 toward the ground, a source of water connected to said nozzle means, said source having an output pressure sufiicient to cause reflection of a spray from said nozzle means from the ground, linearly extending generally elongated collector means transverse to said direction forwardly of said nozzle means for intercepting at least part of the reflected spray water, and a recirculation system for purifying the intercepted water and returning it to said source, said system including pump means coupled with said engine.
  • a street-cleaning attachment for a vehicle having an engine comprising nozzle means above the ground, said nozzle means being trained at an angle of attack of about 25 to 45 toward the ground, a source of Water connected to said nozzle means, said source having an output pressure sufiicient to cause reflection of a spray from said nozzle means from the ground, collector means forwardly of said nozzle means for intercepting at least part of the reflected spray water, and a recirculation system for purifying the intercepted water and returning it to said source, said system including pump means coupled with said engine, said collector means comprising a generally horizontal trough with 21 depending groundcontacting scraper blade inclined at an acute angle to the direction of motion of the vehicle.
  • collector means further comprises a hood above said trough open toward said collector means.
  • a street-cleaning attachment for a vehicle comprising nozzle means above the ground, said nozzle means being trained at an angle of attack of about 25 to toward the ground, a source of water connected to said nozzle means, said source having an output pressure sufficient to cause reflection of a spray from said nozzle means from the ground, collector means for intercepting at least part of the reflected spray Water, and a recirculation system including pump means for purifying the intercepted water, and returning it to said source, said collector means comprising a generally horizontal trough with a depending ground-contacting scraper blade inclined at an acute angle to the direction of motion of the vehicle.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Description

Oct. 6, 1964 w. MAASBERG 3,151,348
DEVICE FOR CLEANING ROADWAYS AND SIMILAR SURFACES Filed Feb. 2. 1962 Wolfgang MAASBERG Jnventor: y
AG EN'T United States Patent 3,151,348 DEVICE FOR CLEANING RQADWAYS AND SAR SURFACES Wolfgang Maasberg, ulheim (Ruhr), Germany, assignor,
by mesne assignments, to Woma-Apparatebau Wolfgang Maasberg & Co., G.m.b.H., Duisburg, Germany Filed Feb. 2, 1962, Ser. No. 171,332 9 Claims. (Cl. 15320) The present invention relates to the cleaning of roadways (e.g. prior to final surfacing), factory floors and similar surfaces.
In road construction it is customary to provide a packed substrate of crushed rock and to cover it with a ballast layer of sand and coarse gravel impregnated with a preferably bituminous filler. This roadbed, after having been compacted by suitable means such as rollers, is generally allowed to set for several months under traflic conditions and is subsequently covered by a surface coating of, for example, fine gravel and a bituminous binder. A careful cleansing of the roadbed is required prior to application of the surface coating if a satisfactory bonding between the layers is to be insured; this requirement also applies to the resurfacing of damaged roadways. The foreign matter is usually picked out between the rocks by pointed sticks, in a laborious and imperfect manner, and is blown out of the way by compressed air. A similar procedure is also followed prior to be filling of cracks between cobblestones with tar or asphalt.
The use of street-cleaning machines with rotating brushes and suction heads for removing street dirt by vacuum action has been found ineffectual, the same being true of sprinklers in combination with oblique brush rollers designed to sweep the dirt toward the gutter. Attempts to flush the roadbed with water have failed since in such process the liquid only carries the dirt deeper into the substrate. a
It is, therefore, the general object of my presentinvention to provide an improved system for cleaning roadways to be surfaced, as Well as large, heavily soiled floor areas of industrial buildings or the like, in an eflicient manner avoiding the inconveniences set forth above.
I have found, in accordance with the instant invention, that this object may be realized by means of a water spray directed at high pressure, suitably of the order of 50-100 atmospheres, onto the surface to be cleaned at an angle of attack which should be between about 25-40 preferably near 30.
In an advantageous arrangement the Water spray reflected from the surface to be cleaned is caught and recirculated after the entrained dust and dirt particles have settled out. The power needed for recirculating the water so purified may be obtained, in a preferred embodiment, from the engine of an automotive vehicle to which the spray and catch means have been attached. These spray and catch means may include a battery of nozzles and a generally horizontal collector comprising a trough and a hood, the latter being open toward the array of nozzles and so positioned as to intercept the reflected streams from these nozzles. The hood may be of progressively increasing height, the narrow end of the hood being positioned relatively close to the sprayer while its wider end is relatively remote therefrom. The collector is then advantageously positioned at an acute angle to the direction of vehicular motion and may conveniently be equipped with a surface-contacting blade adapted to sweep aside any larger objects in the path of the machine. The sprayer itself may extend at right angles to the direction of motion or, if desired, may be arranged substantially mirror-symmetrically to the collector with reference to a vertical plane perpendicular to that direction.
The above and other features of my invention will be more fully apparent from the following detailed description of certain embodiments, reference being made to the accompanying drawing in which:
FIG. 1 is a side-elevational view of an automotive vehicle equipped with a street-cleaning attachment according to the invention;
FIG. 2 is a top-plan view of the vehicle of FIG. 1; and
FIG. 3 is an elevational view of the front portion of a vehicle with a slightly modified attachment.
In the drawing 1 have shown a sanitation truck 4 with engine 5, front wheels 6a, rear wheels 6b and drivers cab 7. The truck 4 carries a water reservoir 8, a settling tank 9 and means, including a high-pressure pump 3 and a suction pump 13, for circulating water from the reservoir 8 to a manifold tube 1 and returning it from a collecting trough 12 to the settling tank 9. Manifold 1 is provided with a series of horizontally arrayed nozzles 2 adapted to create flat, fan-shaped sprays 10; these sprays are directed at an angle of approximately toward the ground surface 11 and are reflected therefrom at a somewhat lesser angle, the trough 12 with its hood 15 being so positioned as to intercept the reflected sprays 10a.
The pump 3 generates a pressure of approximately 50 to atmospheres and has an inlet pipe 16 terminating at a screened intake 17 within the tank 9, this intake being advantageously provided with suitable filter means not shown. The discharge pipe 18 of pump 3 includes a valve 19" and opens into the tank 8 from which a conduit 19 leads into manifold 1. A return pipe 14 extends from the bottom of trough 12 toward the pump 13 which delivers the collected spray water to the tank 9. Pumps 3 and 13 may be driven from the engine 5 via suitable transmission means not shown.
The collector 12, 15 is suspended from the hood of the engine by a pair of braces 20, 21 and is shown provided at its bottom with a blade 22 which scrapes the roadway 11 to turn aside large pebbles and other matter liable to obstruct the water circulation if swept up by the spray. In FIGS. 1 and 2 the manifold 1 with its nozzles 2 extends transversely across the path of the vehicle 4, at substantially the level of the wheel hubs which may be approximately 40 to 50 cm. above ground, whereas in FIG. 3 it has been illustrated in an oblique horizontal position substantially mirror-symmetrical to that of the collector. In FIG. 3, furthermore, the hood overlying the trough 12' has been shown composed of a plurality of generally horizontal metal strips 15.
Although both the trough 12 or 12 and the manifold tube 1 have been depicted as substantially horizontal, they could also be slightly inclined so long as their relative position is such as to insure the interception of most of the reflected spray water by the hood of the collector. I have found that, with the arrangement herein disclosed, substantially all the water can be returned to the system for recirculation and no puddles are left on the surface and that only 1 to 2.5 liters of water are needed for each square meter of surface to be cleaned. The apparatus described is, therefore, also well suited for the scrubbing of factory floors, large patios and similar areas. Naturally, the attachment comprising the sprayer 1 and the collector 12, 15 or 12, 15 may also be secured to the rear end of the truck 4 or to either end of some other type of vehicle, e.g. a trailer or a handcart without engine. Thus, the invention admits of various modifications without departing from the scope and spirit of the appended claims.
I claim:
1. A street-cleaning attachment for a vehicle having an engine, comprising nozzle means above the ground, said nozzle means being trained at an angle of attack of about 25 to 45 toward the ground, a source of water connected to said nozzle means, said source having an outlet pressure sutlicient to cause reflectionof a spray from said nozzle means from the ground, collector means forwardly of said nozzle means for intercepting at least part of the reflected spray Water, and a recirculation sys tem for purifying the intercepted water and returning it to said source, said nozzle means comprising a generally horizontal manifold tube with an array of spray nozzles longitudinally disposed thereon, said collector means having one end relatively close to said tube and another end relatively remote from said tube.
2. An attachment according to claim 1 wherein said collector means comprises a generally horizontal trough provided with a hood open toward said manifold tube, said hood increasing progressively in height from said one end to said other end.
3. An attachment according to claim lwherein said trough is provided with a dependent scraper blade positioned to contact the ground.
4. A street-cleaning attachment for a vehicle having an engine, comprising horizontally extending, elongated nozzle means above the ground transverse to the direction of movement of the vehicle, said nozzle means being trained at an angle of attack of about 25 to 45 toward the ground, a source of water connected to said nozzle means, said source having an output pressure sufiicient to cause reflection of a spray from said nozzle means from the ground, linearly extending generally elongated collector means transverse to said direction forwardly of said nozzle means for intercepting at least part of the reflected spray water, and a recirculation system for purifying the intercepted water and returning it to said source, said system including pump means coupled with said engine.
5. A street-cleaning attachment for a vehicle having an engine, comprising nozzle means above the ground, said nozzle means being trained at an angle of attack of about 25 to 45 toward the ground, a source of Water connected to said nozzle means, said source having an output pressure sufiicient to cause reflection of a spray from said nozzle means from the ground, collector means forwardly of said nozzle means for intercepting at least part of the reflected spray water, and a recirculation system for purifying the intercepted water and returning it to said source, said system including pump means coupled with said engine, said collector means comprising a generally horizontal trough with 21 depending groundcontacting scraper blade inclined at an acute angle to the direction of motion of the vehicle.
6. An attachment according to claim 5 wherein said nozzle means forms a substantially horizontal array of nozzles extending generally transversely to said direction of motion, said trough having one end relatively close to said array and another end relatively remote therefrom.
7. An attachment according to claim 6 wherein said collector means further comprises a hood above said trough open toward said collector means.
8. An attachment according to claim 7 wherein said hood progressively increases in height from said one end to said other end.
9. A street-cleaning attachment for a vehicle, comprising nozzle means above the ground, said nozzle means being trained at an angle of attack of about 25 to toward the ground, a source of water connected to said nozzle means, said source having an output pressure sufficient to cause reflection of a spray from said nozzle means from the ground, collector means for intercepting at least part of the reflected spray Water, and a recirculation system including pump means for purifying the intercepted water, and returning it to said source, said collector means comprising a generally horizontal trough with a depending ground-contacting scraper blade inclined at an acute angle to the direction of motion of the vehicle.
References Cited in the file of this patent UNITED STATES PATENTS 554,168 Beckwith Feb. 4, 1896 936,842 Wilson Oct. 12, 1909 1,260,547 Kern Mar. 26, 1918 1,955,199 Menge Apr. 17, 1934 2,015,875 Sloan Oct. 1, 1935 2,050,634 Stegemann Aug. 11, 1936 2,090,637 Paige Aug. 24, 1937 2,223,963 Nadig Dec. 3, 1940 2,394,760 Felton Feb. 12, 1946 2,661,982 Hudson Dec. 8, 1953 2,889,994 French June 9, 1959 3,011,206 Breither Dec. 5, 1961

Claims (1)

  1. 9. A STREET-CLEANING ATTACHMENT FOR A VEHICLE, COMPRISING NOZZLE MEANS ABOVE THE GROUND, SAID NOZZLE MEANS BEING TRAINED AT AN ANGLE OF ATTACK OF ABOUT 25 TO 45* TOWARD THE GROUND, A SOURCE OF WATER CONNECTED TO SAID NOZZLE MEANS, SAID SOURCE HAVING AN OUTPUT PRESSURE SUFFICIENT TO CAUSE REFLECTION OF A SPRAY FROM SAID NOZZLE MEANS FROM THE GROUND, COLLECTOR MEANS FOR INTERCEPTING AT LEAST PART OF THE REFLECTED SPRAY WATER, AND A RECIRCULATION SYSTEM INCLUDING PUMP MEANS FOR PURIFYING THE INTERCEPTED WATER, AND RETURNING IT TO SAID SOURCE, SAID COLLECTOR MEANS COMPRISING A GENERALLY HORIZONTAL TROUGH WITH A DEPENDING GROUND-CONTACTING SCRAPER BLADE INCLINED AT AN ACUTE ANGLE TO THE DIRECTION OF MOTION OF THE VEHICLE.
US171332A 1961-02-01 1962-02-02 Device for cleaning roadways and similar surfaces Expired - Lifetime US3151348A (en)

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DEM47884A DE1144310B (en) 1961-02-01 1961-02-01 Process for cleaning the substructure of roads or similar areas by means of a high pressure water jet and device for carrying out the process
US171332A US3151348A (en) 1961-02-01 1962-02-02 Device for cleaning roadways and similar surfaces

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447188A (en) * 1966-11-24 1969-06-03 Woma Maasberg Co Gmbh W Road-cleaning vehicle
FR2190981A1 (en) * 1972-06-27 1974-02-01 Dolphin Runway Services Ltd
US4845801A (en) * 1987-02-05 1989-07-11 Commissariat A L'energie Atomique Vehicle for cleaning by liquid spraying and suction
US20060000491A1 (en) * 2004-07-02 2006-01-05 Crocker James P Stripe removal system
US20070215179A1 (en) * 2006-03-16 2007-09-20 Mendenhall Robert L Concrete/asphalt wet washing system
US20090242003A1 (en) * 2008-02-28 2009-10-01 Crocker James P Water Blasting Head With Through Feeding Hydraulic Motor
US20090241999A1 (en) * 2008-02-28 2009-10-01 Crocker James P Modular Stripe Removal System
US20100200514A1 (en) * 2009-01-26 2010-08-12 Crocker James P Water Treatment System For Surface Cleaning Apparatus
US20110139179A1 (en) * 2006-03-16 2011-06-16 Mendenhall Robert L Concrete/Asphalt Wet Washing System
US9908068B2 (en) 2012-02-14 2018-03-06 Waterblasting, Llc Water and debris recovery system
US10662593B1 (en) * 2019-01-07 2020-05-26 Keith E Smith Drag box apparatus

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US554168A (en) * 1896-02-04 Street-cleaning machine
US936842A (en) * 1908-04-04 1909-10-12 John M Wilson Process of removing paint, varnish, and finishes.
US1260547A (en) * 1911-01-30 1918-03-26 Bernard Kern Jr Method of cleaning streets.
US1955199A (en) * 1933-09-28 1934-04-17 Menge Sidney Laurence Pump apparatus
US2015875A (en) * 1933-07-12 1935-10-01 Francis P Sloan Preparation of concrete floorings to receive topping layers
US2050634A (en) * 1932-10-13 1936-08-11 Corp Of Seitz Werke G M B H Method of cleaning bottles
US2090637A (en) * 1936-06-30 1937-08-24 Lawrence R Martin Hydraulic sewage disintegrator
US2223963A (en) * 1938-12-10 1940-12-03 Francis H Nadig Floor cleaning machine
US2394760A (en) * 1944-03-01 1946-02-12 Ora E Felton Slag cleaning tool
US2661982A (en) * 1949-02-25 1953-12-08 Hudson Mfg Co H D Sprayer
US2889994A (en) * 1957-11-21 1959-06-09 Olin Mathieson Liquid lawn feeder
US3011206A (en) * 1957-10-04 1961-12-05 Fahrzeugban Haller G M B H Vehicle for cleaning streets

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US554168A (en) * 1896-02-04 Street-cleaning machine
US936842A (en) * 1908-04-04 1909-10-12 John M Wilson Process of removing paint, varnish, and finishes.
US1260547A (en) * 1911-01-30 1918-03-26 Bernard Kern Jr Method of cleaning streets.
US2050634A (en) * 1932-10-13 1936-08-11 Corp Of Seitz Werke G M B H Method of cleaning bottles
US2015875A (en) * 1933-07-12 1935-10-01 Francis P Sloan Preparation of concrete floorings to receive topping layers
US1955199A (en) * 1933-09-28 1934-04-17 Menge Sidney Laurence Pump apparatus
US2090637A (en) * 1936-06-30 1937-08-24 Lawrence R Martin Hydraulic sewage disintegrator
US2223963A (en) * 1938-12-10 1940-12-03 Francis H Nadig Floor cleaning machine
US2394760A (en) * 1944-03-01 1946-02-12 Ora E Felton Slag cleaning tool
US2661982A (en) * 1949-02-25 1953-12-08 Hudson Mfg Co H D Sprayer
US3011206A (en) * 1957-10-04 1961-12-05 Fahrzeugban Haller G M B H Vehicle for cleaning streets
US2889994A (en) * 1957-11-21 1959-06-09 Olin Mathieson Liquid lawn feeder

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447188A (en) * 1966-11-24 1969-06-03 Woma Maasberg Co Gmbh W Road-cleaning vehicle
FR2190981A1 (en) * 1972-06-27 1974-02-01 Dolphin Runway Services Ltd
US4845801A (en) * 1987-02-05 1989-07-11 Commissariat A L'energie Atomique Vehicle for cleaning by liquid spraying and suction
US20080066781A1 (en) * 2004-07-02 2008-03-20 Crocker James P Stripe removal system
US20060000491A1 (en) * 2004-07-02 2006-01-05 Crocker James P Stripe removal system
US7255116B2 (en) * 2004-07-02 2007-08-14 Crocker James P Stripe removal system
US8357245B2 (en) 2004-07-02 2013-01-22 Crocker James P Stripe removal system
US8012265B2 (en) * 2006-03-16 2011-09-06 The Mendenhall Family Trust Concrete/asphalt wet washing system
US20110139177A1 (en) * 2006-03-16 2011-06-16 Mendenhall Robert L Concrete/Asphalt Wet Washing System
US7527699B2 (en) * 2006-03-16 2009-05-05 Mendenhall Robert L Concrete/asphalt wet washing system
US20070215179A1 (en) * 2006-03-16 2007-09-20 Mendenhall Robert L Concrete/asphalt wet washing system
WO2007109513A3 (en) * 2006-03-16 2008-10-02 Mendenhall Robert Lamar Concrete/asphalt wet washing system
WO2007109513A2 (en) * 2006-03-16 2007-09-27 Mendenhall Robert Lamar Concrete/asphalt wet washing system
US20110139179A1 (en) * 2006-03-16 2011-06-16 Mendenhall Robert L Concrete/Asphalt Wet Washing System
US20090241999A1 (en) * 2008-02-28 2009-10-01 Crocker James P Modular Stripe Removal System
US20090242003A1 (en) * 2008-02-28 2009-10-01 Crocker James P Water Blasting Head With Through Feeding Hydraulic Motor
US9180496B2 (en) 2008-02-28 2015-11-10 Waterblasting, Llc Water blasting head with through feeding hydraulic motor
US20100200514A1 (en) * 2009-01-26 2010-08-12 Crocker James P Water Treatment System For Surface Cleaning Apparatus
US8357292B2 (en) 2009-01-26 2013-01-22 Crocker James P Water treatment system for surface cleaning apparatus
US9908068B2 (en) 2012-02-14 2018-03-06 Waterblasting, Llc Water and debris recovery system
US10265648B2 (en) 2012-02-14 2019-04-23 Waterblasting, Llc Water and debris recovery system
US10662593B1 (en) * 2019-01-07 2020-05-26 Keith E Smith Drag box apparatus

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