US2548923A

US2548923A - Rotary cleaning tool

Info

Publication number: US2548923A
Application number: US611670A
Authority: US
Inventors: Frank J Walters; Homer B Nelson
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-08-20
Filing date: 1945-08-20
Publication date: 1951-04-17
Anticipated expiration: 1968-04-17

Description

April 17, 1951 F. J. WALTERS ET AL 2,548,923

ROTARY CLEANING TOOL Filed Aug. 20, 1945 as 27 2o 2 26 24 2a 3/ 30 a2 33 3mm Homer B. Nelson Fig. Frank J. Walters Patented Apr. 17, 1951 ROTARY CLEANING TOOL Frank J. Walters and Homer B. Nelson, United States Navy Application August 20, 1945, Serial No. 611,670

(Granted under the act of March 3, 1883, as

2 Claims.

amended April 30, 1928; 370 O. G. 757) This invention relates to improvments in hydraulic turbine tools for cleansing metal, wooden, or other surfaces of dirt, paint, and the like.

An object of this invention is to provide a rotary tool for cleansing surfaces that is motivated by hydraulic pressure.

A further object of this invention is to provide a turbine cleansing device that is driven by hydraulic pressure and at the same time the fluid escaping from the turbine jets furnishes a rinsing effect on the surface being cleansed.

A further object of this invention is to provide a hydraulic turbine cleansing device that combines the impact of fiuid from the turbine jets with the rubbing action of the abrading elements on the turbine to cleanse, polish, or scrape the surface operated upon.

A yet further object of this invention is to provide a cleansing device that will remove paint or other surface coatings from metal, wooden, or other similar surfaces without damage to the surface itself.

A yet further object of this invention is to provide a hydraulic turbine device that is provided with detachable brushes which may be used as a scrubbing element and may be removed and substituted for an abrasive element to be used for scouring or polishing metal, wooden or other similar surfaces or may be substituted for an element carrying teeth to chip rust barnacles or the like from hulls of ships or boats.

Other objects and advantages of this invention will become apparent as the discussion proceeds and is considered in connection with the accompanying claims and drawings wherein like characters of reference designate like parts throughout and wherein:

Fig. 1 is a longitudinal section and partial plan view of the tool embodied in this invention, with V a scrubbing brush attached;

Fig. 2 is an end plan view of the tool embodied in this invention; and

Fig. 3 is a perspective view of the detached brushing element, abrasive element and chipping element embodied in this invention.

Referring now to the drawings, wherein for the purpose of illustration is shown a preferred embodiment of this invention, the numeral 4 designates a forked tubular Y frame or handle havin fluid passages 5 which serve the dual purpose of 2 ber such as a webbing or the like I2 rigidly held inside the frame 5, as shown. A cylindrical high pressure drum I4 is rotatably carried upon the end portions of the Y frame 5, as shown. At spaced intervals around and along the drum are reaction jet nozzles I8 having the openings disposed at an angle substantially as shown. Affixed to the outer surface of the drum, in any suitable manner as by welding, riveting, or the like, and spaced longitudinally between the rows of jets, are retaining U-shaped lips or channels l9, adapted to slidably receive a curved plate-2'0 carrying suitable brush bristles 2| of some wearresisting waterproof material such as a phenolic resin brush, of a scrubbing element. When it is desired to use the tool as an abradant the curved plates 20 carrying the brushes 2| are removed from the drum and a plate 20a carrying an abrasive 49 such. as a waterproof Carborundum is inserted into the iJ-shaped channel l9. When the tool is to be used as a chipper or scraper, plates 20b carrying high carbon steel lugs or teeth 5!] are substituted for the brushes. The

backs

20, 20a, and 20b.are held in place by means of pins or screws 22. When the tool is used as a scrubbing element the tips 23 of the bristles 2|, adjacent the jets l8, and in line with the spray therefrom, are tapered off at 23, as shown, so that water from the said jets will not impinge and dissipate itself upon the said bristles. L

A tubular shaft 24, rigidly supported by end portions 25 of the Y 4, and communicating with the fluid passages 5, supports a bearing housing l5. At spaced intervals in the said shaft 24 are fluid openings 26 which permit passage of fluid into the drum I4. The sum of the cross sectional areas of the openings 26 is equal to the sum of the cross sectional areas of the passages 5 in both arms of the Y 4. This specific size of the openings 26 is to permit unrestricted flow of fluid into the drum l4 from the tubular passages 5.

The bearing housing l5, rotatably supports the said drum at each end, and. consistsof a circular plate 21 fitting into the ends of the drum M; as shown. An inner depending flange 28 of they said drum rotates around but spaced away from, the shaft 24 and forms an annular recess 29, as shown, which carries a fluid pressure sealing ring consisting of a leather or fabric Washer 30 held against the said shaft 24 by a retaining spring 3 I The washer 30 is held in the circular plateZ'l by a nut 32 having spanner sockets 33 for tightening the nut, as shown. A ball, roller, or other anti-friction bearing 34 rotatably supports the end plate 2! on the shaft 24. An outside bearing seal 35 prevents the entrance of foreign matter into the bearing 34. The said bearing 34 is slide ably or press fitted into the plate 21, as shown, and faces on its inner circumference against an 3 annularioffsetzorsshoulder 36. .inzthe; shaft 24, as shown. This arrangement holds tthebearing and drum in proper position between the arms of the Y. A second plate 38, held in place by screw as: holds the bearing 34 in the plate 21.

In order to permit assembly of the shaftZi-"into' the Y and to hold the samearigidiy in ;place:while at the same time permitting passage of fluid from the tubular channel 5 into. the said shaft, it is necessary that some form of removable fluid connection such as a shaft support 46 be provided. The said support 40 carries threads 41 and screws into the end 25 of the Y 4. Adjacent the end of the support opposite the threadsis a depending lip 46 adapted to firmly receive the end of the shafti2'4. Pressure seals 42, such as Urings, are provided, as shown, between the support and the Y and the shaft to prevent fluid leakage. The center of the said support is formed into a hollow cylinder and is in open communication with the fiuid passage 5--by means of holes 43, and a channel 44 provided within the end25'of the said Y communicating likewise with the fluid passage 5. Thesaid channel 44- is such that regardless of the radial position of the holes 43 the volume of fluid" passing through the holes-Will be the maxi mum furnished bythe said-passage 5 An insert plug 45, carriedin the end'of the support Mextending into the hollow cylinder, as shown, restricts turbulence and'maintains a uniform cross sectional area in the fluid passage as direction offiow changes. Thisarrangement permits the drum and bearing'to be assembled complete and then inserted into'the Y. The shaft support i!) isthen screwed'into'place'by-means of a spanner wrench (not shown) adapted to fit the spanner sockets' l'I-and whentightened 'locks'the shaft 24 firmly in place.

It istobe understood that thebearing housing andshaft'support bearing described in' detail is but" one of severalforms thatcould beiused without departing from the spirit of this invention.

In operation fiuidsuch as water is carried'underhigh pressure through thehose. 6 through the Y 4 into thedrum I4thence out the jets 18. Reaction of the fluid through the said jets causes the drum to rotate. manually to the surface to be cleansed, polished, scraped, or chipped. The rotary action of the brush, abradant, scraper, or chipper loosens the foreignmatter. from the surface operated upon. The impact ofthe fluid from the jets, also-acting on the surface operated. on, assists. in loosening the foreign matter from the surface. When the tool is used as a brush the bristles 2| .aidediby the fluid from the jets have a sufficiently strong scrubbing, action to loosenforeignmatter such-as dirt, grease, and .even .paintsbut wilLnotdamaee the surface acted upon. It istobenoted that this tool. is: particularly valuablefor cleansing boats and'the like,,as. it will. remove the surface material butwill not destroy the caulking. When it is desired to use this toolasa polisher or the likethe backs 20 andthe brushes 2] are removed from the U channel l9 and thebacks 20a carrying waterproof Carborundum poli'shers 49 or the like are inserted" into thesaid channel and the tool is then" manually applied to the surface to be -polished; the impact from the'jets (as when the tool is used for a brush) washes the surface and at the'same time also aids in loosening-any foreign material present dueto the impact of the-fluid. Whenthetoolis to be'used as a scraper The tool is then. applied 'or: chipper. banks: 2% providedwithhigh carbon steel teeth or other similarlyhard teeth 50 are fitted into each of the channels 19 and the tool is then manually applied to the surface operated uponas in the other cases.

It is to be understood that the form of the invention, herewith. shown and described, is to be taken as a preferred example of the same, and that various changes in the shape, size and arrangement of parts may be resorted to, without departing from the spirit of the invention, or the scope of the sub-joined claims.

The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the paymentof any royalties thereon or therefor.

What we claim is:

1. In a device of the character described the combination of a hollow tubular handle with a Y- shaped end having a pair of fluid'outlets, said hollow handle being adapted to be connected to a source of fiuid under pressure, a support having a removable bearing threaded into the end of each outlet, each support having a passageway communicating with the associated outlet, a drum rotatably mounted onthe bearings, means for substantially preventing turbulence in said drum including a fixed'hollow liquid delivery tube eX- tending through the drum-between the bearings, said tube being provided with a plurality of :openings whose, total cross sectional area is equal to the sum of the cross sectional area of'theifiuid passages in the Y-shaped end, a plurality of axial rows of tangential jet orifices in said drum, and removable scrubbing members secured to the surface of said-drum between'said rows of jet'orifices said members having beveled edges adjacent the downstream end of the jetsso as to-substantially prevent any impingement of said jets on said edges whereby a surface to be cleaned maybe subjected alternatingly to the friction of each scrubbing member and to the impinging action of each row of jets successively;

2. A device as characterized in claim 1' having further turbulence preventing members including a conically-ended fiuidfiow diverting plug fixed to each of said supportsaxially in said passage.- ways, said passagewayswith said plugs therein also having a cross-sectional areavv equal to the sum of the cross-sectional areaofthe fiuid passages in the Y-shaped' end.

. FRANK .1. WALTERS.

HOMER B. NELSON.

REFERENCES CITED The; followingreferences are of record .inzthe file of this patent.

UNITED. STATES PATENTS- Number Name Date.

673',960 Looker May 14, 1901 1,471,748 Miller 0015.23, 1923. 1,597,644 Wiener Aug, 24, 1926 2,205,249 Fitzgerald et al June 18., 1940 2,281,773 Kollmann May 5', 1,9142v FOREIGN PATENTS Number Country Date 383,631 Germany Oct. 15, 1923' 572,750 France June 12, 1924 193,300 Switzerland Dec. 16, 1937