US2930065A - Scraper attachment for power tool - Google Patents

Scraper attachment for power tool Download PDF

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US2930065A
US2930065A US685196A US68519657A US2930065A US 2930065 A US2930065 A US 2930065A US 685196 A US685196 A US 685196A US 68519657 A US68519657 A US 68519657A US 2930065 A US2930065 A US 2930065A
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hub
tufts
scraping
power tool
tuft
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US685196A
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Henry C Duhoux
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
    • B08B7/024—Rotary scalers

Definitions

  • This invention relates to a scraper attachment for a power tool for scraping the surfaces of hard materials such as concrete, stucco, rock, asphalt, metal and the like to remove paint or to reface unpainted surfaces.
  • Removal of hardened paint from masonry surfaces is usually accomplished by sand blasting techniques which involve the use of expensive equipment and a large quantity of especially prepared sand. Sand blasting requires a degree of skill and experience beyond that of the novice. In addition, there are certain difiiculties inherent in a sand blasting operation even when professional operators are employed.
  • the major object of this invention is to provide a power tool attachment for scraping hard surfaces having a scraper with easily removable and adjustable scraping tufts.
  • Another object of this invention is to provide a power
  • Another major object of this invention is to provide a power tool attachment for scraping hard surfaces which is effective up to the edge of wood window casings or other wood trim without damaging the wood.
  • Another object of this invention is to provide a power tool attachment for scraping hard surfaces which will perform the scraping operation uniformly over large areas.
  • one of the features of the invention resides in the arrangement of a plurality of scraping tufts radiating from a hub at angles greater than and less than 90 to the axis of the hub and which are angularly spaced from each other about the hub at angles greater than 45.
  • Another feature of the invention resides in the construction of the scraping tufts, each of which has a plurality of superimposed sets of fiat, elongate, spring steel scraping members side by side in planes paralleling the axis of rotation of the scraper.
  • the scraper attachment construction which includes a hub member and a cover member for retaining the scraping tufts at the desired angle relative to the axis of the hub and rigidly coupling them to the hub.
  • Fig. l is a plan view of the scraper attachment for a power tool embodying the invention in its preferred form with one part broken away and shown in section to show the assembly of one of the, scraping tufts;
  • Fig. 2 is a cross-sectional view of the scraper attachment attached to a power tool
  • Fig. 3 is a partial sectional view of the scraping tuft and tuft retaining lug taken on line 33 of Fig. 2;
  • Fig. 4 is a side elevational view of one of the scraping tufts shown in, Figure 1; v
  • Fig. 5 is a plan view of the scraping tuft shown in Figure 4.
  • Fig. 6 is a plan view of a modified scraper attachment showing an alternate arrangement of tufts in the hub;
  • Fig. 7 is a side view of one of the scraping tufts and tuft retaining lug sh )wn in Fig. 2.
  • the scraper attachment generally indicated at 16 includes a hub member 12 and a cover member 14. Spaced about the peripheral margin of the hub member are a plurality of tuft receiving chambers 16 having a bottom wall 18 inclined to the axis of the hub and side walls 20 and 22 extending upwardly from the bottom wall 18. Between the side walls 26 and 22, an end wall 24 extends upwardly from the bottom wall 18 defining a peripheral opening 2 6 on the peripheral margin of the hub member 12. Projecting from the bottom wall and disposed between the side walls 20 and 22 is a retaining element 28 the function of which will be explained in greater detail later in the specification.
  • a removable retaining lug 30 Disposed between each of the chambers 16 is a removable retaining lug 30, constructed of a resilient material such as hard rubber, with side walls 32 and 34 and a partition 36 therebetween extending from a base portion 44 to define channels 38 and 40 which extend from the retaining element 28 toward the periphery of the hub member 12 and in which scraping tufts 42 are inserted.
  • the channels are of a depth sufiicient to isolate the scraping tufts from the hub 12. In this way, vibration of the blades does not cause them to engage any part of the hub so that workhardening and resultant breaking is avoided.
  • the resilient sheet 46 of neoprene or a like material is placed over the top of the retaining lug 30 and the scraping'tuft therein.
  • a steel clip 48 overlies the sheet 46 and is secured to the retaining lug 30 by tabs 50 and 52 which engage in grooves 54 and 56 extending the length of the side walls 32 and 34.
  • the retaining lug 30 has an inclined face 58 which rests against an inclined face 60 of the retaining element 28.
  • the back edge;62 andlthe front edge 64 of the lugs are disposed at an angle with a shoulder 66 overhanging the end wall 24 of the hub member.
  • Each of the tufts 42 is composed of a plurality of fiat, elongate, steel blades 68 arranged side by side in sets 70 with several sets imposed one upon the other and bent at 72 into a U-shape. .In the assembly, the tufts are inserted into the channels 38 and 49 of the retaining lug 30, the resilient sheet 46 placed over them, and the steel clip 48 snapped into place. Each of the retaining lugs .and the tufts thus assembled are inserted into the chambers 16 in the hub with the bent portion 72 straddling the retaining elements 28.
  • the retaining lug is composed of a resilientmaterial which acts as a bushing to'reduce severity of the vibration effect associated with the tufts under operating conditions.
  • the center line of these cham 'bers 16 lies on a line spaced from and parallel to a radial line of the hub.
  • the tuft leg portions each lie in a plane parallel to a radial axial plane of the hub, and the leg portions also lie in a plane at an angle of greater than 45 and less than 90 to the hub 'axis.
  • the tuft leg portions each lie longitudinally edgewise on the surface of a cone having its apex at the hub axis and having an included apex angle greater than 90 and less than 180.
  • the scraping elements are arranged ingroups of individual U-shaped tufts, the groups being angularly spaced from one another about the hub at angles of greater than 45.
  • the approximate circle of rotation at the end 'of the tuft is inclined at an acute angle with respect to the surface to be scraped to create a more effective scraping action.
  • this angle of inclination or attack may be adjusted by the operator. This permits the effective scraping of the sur- "face right up to an edge of a wooden window casing or other similar margins without damaging the wood or ex- "ceeding the margin.
  • the upward lift of such engagement is normally sufficient to carry most of the weight of the apparatus so that an operator need provide only a sufficient force "to guide the apparatus to control the degree of scraping.
  • each blade is arranged to face in the direc- "tion ofthe rotation of the hub so that the tufts are relatively flexible in the direction around the circle of rotation and relatively rigid in the direction of the axis of "rotation.
  • the flexibility and spacing of the tufts around the circle of rotation causes them to engage the surface "with a severe whipping action which chips the surface.
  • 'Thechipping action increases with the increased inclination of the circle of rotation of the ends of the tufts with respect to the surface being scraped, which effect produces chick and easy control of the degree of scraping, the degree of control being enhanced by the relative rigidity of 'thetufts in the direction approximately parallel to the axis ofrotation.
  • the blades of the tufts are preferably made of spring steel and the greatest success has been found by using flat, elongate blades. Also fiat blades are the easiest to insert in'the retaining 'lugs.
  • the scraper attachment is of 4 great value in removing welding flux andspatter as well as paint and rust from metal surfaces.
  • the modification of the power tool attachment as seen in Figure 6 shows the center of the tuft lying in the same plane as a radius of the hub. Although the tool performs effectively when the tufts are so positioned, experience has shown that offsetting the tufts as shown in Figure 1 stops chattering of the scraper and permits the tool to be used flat against the surface without inclining the tool at an acute angle with respect to the surface to be scraped if it is so desired.
  • a scraper attachment for a power tool comprising a hub rotatable about its axis by a power tool and a plurality of groups, of individual U-shaped scraping tufts carried by said hub and projecting therebeyond, each of said tufts having bight portions fixedly secured to said hub for rotation therewith and leg portions also rotatable with said hub and elongated in a plane parallel to a radial, axial plane of the hub axis and said tuft legs each lying longitudinally edgewise on the surface of a cone having its apex at said axis and the included apex angle of said cone being greater than and less than said tuft groups being angularly spaced from one another about said hub at angles greater than 45.
  • a scraper attachment for a power tool comprising a hub assembly rotatable about its axis by a power tool, said hub assembly comprising a hub member and a cover member secured together to cooperatively define a plurality of peripherally spaced individual recesses, and means on one of said members defining rigid retaining elements projecting into each of said recesses, respectively; scraping tufts anchored in each of said recesses, said tufts each comprising a plurality of nested, fiat, elonate, steel blades of U-shaped configuration having bight portions lapping said retaining elements and leg portions projecting beyond'said recesses, said tuft leg portions each lying in a plane parallel to a radial, axial plane of the hub and lying longitudinally edgewise on the surface of a cone having its apex at said axis and the included apex angle being greater than 90 and less than 180; and resiliently deformable shock-absorbing means interposed between the leg portions of said tufts and said hub assembly radi
  • shock-absorbing means comprises an elastomeric block having parallel grooves in which said tuft leg portions are confined and means closing the grooves and interposed between one of said members and said block.
  • a scraper attachment for a power tool comprising a hub assembly rotatable about its axis by a power tool, said hub assembly comprising a hub member and a cover member secured together to cooperatively define a plurality of peripherally spaced separate recesses, and means on one of said members defining fixed retaining elements projecting into each of said recesses, respectively; scraping tufts anchored in each of said recesses, said tufts each comprising a plurality of nested, fiat, elongate, steel blades of U-shaped configuration having bight portions lapping said fixed retaining elements and leg portions projecting from said recesses beyond the hub assembly each such tuft leg being elongate to lie in a plane parallel to a radial, axial plane of the hub axis and said leg also lying in a plane at an angle of greater than 45 and less than 90 to said axis; and resilient lugs disposed in said recesses, respectively, to substantially fill said recesses radially outwardly of said retaining elements
  • a scraping tuft comprising a plurality of adjacent, aligned stacks of nested U-shaped blades each having substantially parallel planar scraper legs joined by a medial bent portion, the planar legs of adjacent blades in each stack being in extended surface contact for mutual reinforcego ment, the aligned edges of the medial bent portions and of the legs of the blades in adjacent stacks being in extended contact with one another for mutual transverse reinforcement, whereby the blade legs are mutually reinforced, but individually flexible, in all directions.

Landscapes

  • Polishing Bodies And Polishing Tools (AREA)

Description

Ma.rch 29, 1960 Filed Sept. 20, 1957 H. C. DUHOUX .SCRAPER ATTACHMENT FOR POWER TOOL 2 Sheets-Sheet 1 INVENTOR Henry CIDa/zoux BY M W I ATTORNEYS March 29, 1960 H. c. DUHOUX 2,930,055
SCRAPER ATTACHMENT FOR POWER TOOL Filed Sept. 20, 1957 2 Sheets-Sheet 2 NH .111 [III lll-llll .1" m! Illl jill-lpl m I [HI Hal I i INVENTOR Henry C. Du/zoux BY M M W ATTORNEYS United States Patent 2,930,065 SCRAPER ATTACHMENT FOR POWER T001.
Henry C. Duhoux, Alhambra, Calif.
Application September 20, 1957, Serial No. 685,196
8 Claims. (Cl. 15-236) This invention relates to a scraper attachment for a power tool for scraping the surfaces of hard materials such as concrete, stucco, rock, asphalt, metal and the like to remove paint or to reface unpainted surfaces.
Removal of hardened paint from masonry surfaces is usually accomplished by sand blasting techniques which involve the use of expensive equipment and a large quantity of especially prepared sand. Sand blasting requires a degree of skill and experience beyond that of the novice. In addition, there are certain difiiculties inherent in a sand blasting operation even when professional operators are employed. For example, in refacing or removing paint from relatively soft stucco, such as extensively used in the construction of western homes, the lack of control of the scraping action of the sand blast results in an uneven removal of the stucco surface, and wooden trim such as window sills and decorative goings must be given a wide clearance to avoid defacing Power driven wire brushes have also been used for this purpose, but these have a tendency to rub or burn the paint into the pores of the surface rather than to scrape the paint off the surface. In addition, the general shape of wire brushes prevents their engagement in irreg- Ellarities or crevices commonly encountered in such suraces.
The major object of this invention is to provide a power tool attachment for scraping hard surfaces having a scraper with easily removable and adjustable scraping tufts.
Another object of this invention is to provide a power Another major object of this invention is to provide a power tool attachment for scraping hard surfaces which is effective up to the edge of wood window casings or other wood trim without damaging the wood.
Another object of this invention is to provide a power tool attachment for scraping hard surfaces which will perform the scraping operation uniformly over large areas.
In attaining these objects, one of the features of the invention resides in the arrangement of a plurality of scraping tufts radiating from a hub at angles greater than and less than 90 to the axis of the hub and which are angularly spaced from each other about the hub at angles greater than 45.
Another feature of the invention resides in the construction of the scraping tufts, each of which has a plurality of superimposed sets of fiat, elongate, spring steel scraping members side by side in planes paralleling the axis of rotation of the scraper.
Another feature of the invention resides in the scraper attachment construction which includes a hub member and a cover member for retaining the scraping tufts at the desired angle relative to the axis of the hub and rigidly coupling them to the hub.
These and other objectsand advantages of the invention will become apparent from the following specification taken in connection with the accompanying drawings wherein: f
Fig. l is a plan view of the scraper attachment for a power tool embodying the invention in its preferred form with one part broken away and shown in section to show the assembly of one of the, scraping tufts;
Fig. 2 is a cross-sectional view of the scraper attachment attached to a power tool; 4
Fig. 3 is a partial sectional view of the scraping tuft and tuft retaining lug taken on line 33 of Fig. 2;
Fig. 4 is a side elevational view of one of the scraping tufts shown in, Figure 1; v
Fig. 5 is a plan view of the scraping tuft shown in Figure 4;
Fig. 6 is a plan view of a modified scraper attachment showing an alternate arrangement of tufts in the hub;
Fig. 7 is a side view of one of the scraping tufts and tuft retaining lug sh )wn in Fig. 2.
As shown in Figures 1 and 2, the scraper attachment generally indicated at 16, includes a hub member 12 and a cover member 14. Spaced about the peripheral margin of the hub member are a plurality of tuft receiving chambers 16 having a bottom wall 18 inclined to the axis of the hub and side walls 20 and 22 extending upwardly from the bottom wall 18. Between the side walls 26 and 22, an end wall 24 extends upwardly from the bottom wall 18 defining a peripheral opening 2 6 on the peripheral margin of the hub member 12. Projecting from the bottom wall and disposed between the side walls 20 and 22 is a retaining element 28 the function of which will be explained in greater detail later in the specification. Disposed between each of the chambers 16 is a removable retaining lug 30, constructed of a resilient material such as hard rubber, with side walls 32 and 34 and a partition 36 therebetween extending from a base portion 44 to define channels 38 and 40 which extend from the retaining element 28 toward the periphery of the hub member 12 and in which scraping tufts 42 are inserted. As shown in Figure 7, the channels are of a depth sufiicient to isolate the scraping tufts from the hub 12. In this way, vibration of the blades does not cause them to engage any part of the hub so that workhardening and resultant breaking is avoided. Similarly, to keep the blades from contact with the cover member 14, the resilient sheet 46 of neoprene or a like material, is placed over the top of the retaining lug 30 and the scraping'tuft therein. To lock the sheet 46 and the tuft 42 in place, a steel clip 48 overlies the sheet 46 and is secured to the retaining lug 30 by tabs 50 and 52 which engage in grooves 54 and 56 extending the length of the side walls 32 and 34.
' As best seen in Figure 7, the retaining lug 30 has an inclined face 58 which rests against an inclined face 60 of the retaining element 28. The back edge;62 andlthe front edge 64 of the lugs are disposed at an angle with a shoulder 66 overhanging the end wall 24 of the hub member. 1,
Each of the tufts 42, as seen in Figures 4 and 5, is composed of a plurality of fiat, elongate, steel blades 68 arranged side by side in sets 70 with several sets imposed one upon the other and bent at 72 into a U-shape. .In the assembly, the tufts are inserted into the channels 38 and 49 of the retaining lug 30, the resilient sheet 46 placed over them, and the steel clip 48 snapped into place. Each of the retaining lugs .and the tufts thus assembled are inserted into the chambers 16 in the hub with the bent portion 72 straddling the retaining elements 28.
Experience has shown that under normal conditions the tufts can be expected to wear out after about one days operation. The replacement of the tufts isa'ccomplish'ed by removingscrews 74 and lifting off the cover member 14. Upon removal of the tufts and retaining lugs from chamber 16, a newly assembled lug and tuft is inserted. The cover member is then once "again secured to the hub member and the scraper .is ready for use. The retaining lug is composed of a resilientmaterial which acts as a bushing to'reduce severity of the vibration effect associated with the tufts under operating conditions.
Closing each of the chambers 16 and retaining the tufts 42 therein by a closure wall 76 and side walls 78 and 80, is the cover member 14 which rests on the hub member 12 and is secured thereto by the screws 74. The hub is adapted to be coupled to the power tool 82 through a threadedopening 84 located at the center of the cover member which accommodates the threaded driving shaft =86 of the power tool.
As best seen in Figure 1, the center line of these cham 'bers 16 lies on a line spaced from and parallel to a radial line of the hub.
According to the present invention, the tuft leg portions each lie in a plane parallel to a radial axial plane of the hub, and the leg portions also lie in a plane at an angle of greater than 45 and less than 90 to the hub 'axis. The tuft leg portions each lie longitudinally edgewise on the surface of a cone having its apex at the hub axis and having an included apex angle greater than 90 and less than 180. The scraping elements are arranged ingroups of individual U-shaped tufts, the groups being angularly spaced from one another about the hub at angles of greater than 45.
In use, the approximate circle of rotation at the end 'of the tuft is inclined at an acute angle with respect to the surface to be scraped to create a more effective scraping action. To control the severity of the scraping action, this angle of inclination or attack may be adjusted by the operator. This permits the effective scraping of the sur- "face right up to an edge of a wooden window casing or other similar margins without damaging the wood or ex- "ceeding the margin. Furthermore, with one side of the circle of rotation of the tuft engaging the surface to be scraped, the upward lift of such engagement is normally sufficient to carry most of the weight of the apparatus so that an operator need provide only a sufficient force "to guide the apparatus to control the degree of scraping.
The fiat of each blade is arranged to face in the direc- "tion ofthe rotation of the hub so that the tufts are relatively flexible in the direction around the circle of rotation and relatively rigid in the direction of the axis of "rotation. The flexibility and spacing of the tufts around the circle of rotation causes them to engage the surface "with a severe whipping action which chips the surface. 'Thechipping action increases with the increased inclination of the circle of rotation of the ends of the tufts with respect to the surface being scraped, which effect produces chick and easy control of the degree of scraping, the degree of control being enhanced by the relative rigidity of 'thetufts in the direction approximately parallel to the axis ofrotation.
In operation, the vibration effects associated with each tuft are very severe. When metal tufts are used, there have been instances of premature failure of the tufts befcause of crystallization of the blades near the point where they extend out of the lug. Furthermore, the operator of the apparatus is subjected to a considerable amount of vibration. By constructing the lugs from a resilient mater'ial, such as hard rubber, it has been found that the lugs act both as .a shock absorber between the blades and the operator, and also prevent failure of the blades because of crystallization.
The blades of the tufts are preferably made of spring steel and the greatest success has been found by using flat, elongate blades. Also fiat blades are the easiest to insert in'the retaining 'lugs. The scraper attachment is of 4 great value in removing welding flux andspatter as well as paint and rust from metal surfaces.
The modification of the power tool attachment as seen in Figure 6 shows the center of the tuft lying in the same plane as a radius of the hub. Although the tool performs effectively when the tufts are so positioned, experience has shown that offsetting the tufts as shown in Figure 1 stops chattering of the scraper and permits the tool to be used flat against the surface without inclining the tool at an acute angle with respect to the surface to be scraped if it is so desired.
While only two embodiments of applicants invention have been disclosed, it will be apparent to those skilled in the art that various changes and modifications coming within the scope of the invention are to be included in the appended claims.
What I claim as my invention is:
1..A scraper attachment for a power tool comprising a hub rotatable about its axis by a power tool and a plurality of groups, of individual U-shaped scraping tufts carried by said hub and projecting therebeyond, each of said tufts having bight portions fixedly secured to said hub for rotation therewith and leg portions also rotatable with said hub and elongated in a plane parallel to a radial, axial plane of the hub axis and said tuft legs each lying longitudinally edgewise on the surface of a cone having its apex at said axis and the included apex angle of said cone being greater than and less than said tuft groups being angularly spaced from one another about said hub at angles greater than 45.
2. A scraper attachment as defined in claim 1, wherein resiliently deformable shock-absorbing means are interposed between the leg portions of each group of tufts and the hub to isolate the hub assembly from the vibration of the leg portions during working.
3. A scraper attachment for a power tool comprising a hub assembly rotatable about its axis by a power tool, said hub assembly comprising a hub member and a cover member secured together to cooperatively define a plurality of peripherally spaced individual recesses, and means on one of said members defining rigid retaining elements projecting into each of said recesses, respectively; scraping tufts anchored in each of said recesses, said tufts each comprising a plurality of nested, fiat, elonate, steel blades of U-shaped configuration having bight portions lapping said retaining elements and leg portions projecting beyond'said recesses, said tuft leg portions each lying in a plane parallel to a radial, axial plane of the hub and lying longitudinally edgewise on the surface of a cone having its apex at said axis and the included apex angle being greater than 90 and less than 180; and resiliently deformable shock-absorbing means interposed between the leg portions of said tufts and said hub assembly radially outwardly of said retaining means.
4. A scraper attachment as defined in claim 3, wherein said members are circular in configuration and the peripherally spaced recesses defined thereby are offset from, but parallel to, radii of said members.
5. A scraper attachment as defined in claim 3, wherein said shock-absorbing means comprises an elastomeric block having parallel grooves in which said tuft leg portions are confined and means closing the grooves and interposed between one of said members and said block.
6. A scraper attachment for a power tool comprising a hub assembly rotatable about its axis by a power tool, said hub assembly comprising a hub member and a cover member secured together to cooperatively define a plurality of peripherally spaced separate recesses, and means on one of said members defining fixed retaining elements projecting into each of said recesses, respectively; scraping tufts anchored in each of said recesses, said tufts each comprising a plurality of nested, fiat, elongate, steel blades of U-shaped configuration having bight portions lapping said fixed retaining elements and leg portions projecting from said recesses beyond the hub assembly each such tuft leg being elongate to lie in a plane parallel to a radial, axial plane of the hub axis and said leg also lying in a plane at an angle of greater than 45 and less than 90 to said axis; and resilient lugs disposed in said recesses, respectively, to substantially fill said recesses radially outwardly of said retaining elements and having grooves in which the tuft blades are seated, said resilient lugs having groove-defining portions interposed between said hub assembly and said tuft legs to prevent contact therebetween to isolate the hub assembly from the vibration of the tuft legs during Working.
7. A scraper attachment as defined in claim 6 wherein the grooves in said resilient lugs are closed by clips interposed between one of said members and said resilient lugs.
8. For use with a power tool scraper attachment, a scraping tuft comprising a plurality of adjacent, aligned stacks of nested U-shaped blades each having substantially parallel planar scraper legs joined by a medial bent portion, the planar legs of adjacent blades in each stack being in extended surface contact for mutual reinforcego ment, the aligned edges of the medial bent portions and of the legs of the blades in adjacent stacks being in extended contact with one another for mutual transverse reinforcement, whereby the blade legs are mutually reinforced, but individually flexible, in all directions.
References Cited in the file of this patent UNITED STATES PATENTS 1,497,921 Levedahl June 17, 1924 1,650,035 Peterson Nov. 22, 1927 1,967,651 Anderson July 24, 1934 2,178,169 Goertzen Oct. 31, 1939 2,241,845 Chapman May 13, 1941 2,523,319 Middlestadt Sept. 26, 1950 2,552,382 Root May 8, 1951 2,565,047 Rowland Aug. 21, 1951 2,740,980 Asbury Apr. 10, 1956 2,763,257 Asbury Sept. 18, 1956 FOREIGN PATENTS 528,587 France Aug. 20, 1921
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094731A (en) * 1961-05-12 1963-06-25 Theodore J Owen Paint remover
US3353201A (en) * 1966-08-05 1967-11-21 John P Horton Broom construction
US3754296A (en) * 1971-12-16 1973-08-28 G Talbert Rotary flail type chipping head

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR528587A (en) * 1919-12-19 1921-11-15 Gewerk Eisenhuette Westfalia Machine for cleaning wagons
US1497921A (en) * 1921-01-26 1924-06-17 Independent Pneumatic Tool Co Rotary brush
US1650035A (en) * 1924-10-14 1927-11-22 Peterson August Polishing and cleaning machine
US1967651A (en) * 1933-02-14 1934-07-24 Anderson John Gutter broom for street sweepers
US2178169A (en) * 1937-11-13 1939-10-31 Carl Siver Butcher block treating implement
US2241845A (en) * 1938-04-06 1941-05-13 Wm A Spear Brush
US2523319A (en) * 1945-09-18 1950-09-26 James Gibbons Company Rotary beater
US2552382A (en) * 1948-10-14 1951-05-08 Root Arthur John Rotary brush for lawn sweepers
US2565047A (en) * 1946-08-12 1951-08-21 Fuller Brush Co Brush with flat wire elements
US2740980A (en) * 1953-02-25 1956-04-10 Charles T Asbury Apparatus for cutting and abrading
US2763257A (en) * 1952-05-23 1956-09-18 Fidelity Service Inc Apparatus for cutting stone

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR528587A (en) * 1919-12-19 1921-11-15 Gewerk Eisenhuette Westfalia Machine for cleaning wagons
US1497921A (en) * 1921-01-26 1924-06-17 Independent Pneumatic Tool Co Rotary brush
US1650035A (en) * 1924-10-14 1927-11-22 Peterson August Polishing and cleaning machine
US1967651A (en) * 1933-02-14 1934-07-24 Anderson John Gutter broom for street sweepers
US2178169A (en) * 1937-11-13 1939-10-31 Carl Siver Butcher block treating implement
US2241845A (en) * 1938-04-06 1941-05-13 Wm A Spear Brush
US2523319A (en) * 1945-09-18 1950-09-26 James Gibbons Company Rotary beater
US2565047A (en) * 1946-08-12 1951-08-21 Fuller Brush Co Brush with flat wire elements
US2552382A (en) * 1948-10-14 1951-05-08 Root Arthur John Rotary brush for lawn sweepers
US2763257A (en) * 1952-05-23 1956-09-18 Fidelity Service Inc Apparatus for cutting stone
US2740980A (en) * 1953-02-25 1956-04-10 Charles T Asbury Apparatus for cutting and abrading

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094731A (en) * 1961-05-12 1963-06-25 Theodore J Owen Paint remover
US3353201A (en) * 1966-08-05 1967-11-21 John P Horton Broom construction
US3754296A (en) * 1971-12-16 1973-08-28 G Talbert Rotary flail type chipping head

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