US2649603A - Device for releasably securing brush strips in brush rolls - Google Patents

Description

Aug. 25, 1953 E, SEGESMAN 2,649,603 DEVICE FOR RELEASABLY SECURING BRUSH STRIPS IN BRUSH ROLLS Filed Sept. 16, 1948 2 Sheets-Sheet 1 c mm INVENTOR. 7 Louis E. Seyesman ATTORNEY.

Q QM. NNMY MK. MN. NW. N Q\ 'H QIH Aug. 25, 1953 E. SEGESMAN 2,649,603 DEVICE FOR RELEASABLY SECURING BRUSH STRIPS IN BRUSH ROLLS Filed Sept. 16, 1948 2 Sheet s-She et 2 INVENTOR. Louis E. Segresman BY A ATTORNEY.

Patented Aug. 25, 1953 DEVICE FOR RELEASABLY SECURING BRUSH STRIPS IN BRUSH ROLLS Louis E. Segesman, Canton, Ohio, assignor to The Hoover Company, North Canton, Ohio, a

corporation of Ohio Application September 16, 1948, Serial No. 49,579

5 Claims. 1

My present invention relates to the art of cleaning devices and more particularly to a brush mounting device particularly designed for use in the nozzle mouth of a suction cleaning apparatus.

It is an object of the present invention to provide a brush roll particularly adapted for suction cleaning devices which consists of a drum having rigidly attached and inset therein a bristle strip with the bristles projecting beyond the periphery of the drum, but in which the total length of the bristles is considerably less than the radial distance from their outer ends to the center of the drum.

It is a further particular object of the present invention to provide a brush roll or agitator construction in which a brush strip is mounted in a recess in the periphery of the roll and wedged therein by a simple, quickly detachable, light weight, inexpensive part.

It is a further object of the present invention to provide a brush roll having an L-shaped land formed therein in the corner of which is seated a brush strip and a wedging device detachably secured to one face of the L-shaped land serving to wedge the brush strip into position in the angle formed by the two legs of the L-shaped land.

Other objects and advantages of the invention will become apparent as the description proceeds when taken in connection with the accompanying drawing in which:

Figure 1 is an elevational view partly in section showing the preferred form of the invention;

Figure 2 is a sectional view taken along the lines 22 of Figure 1;

Figure 3 is a modified form of the invention shown in Figure 1 illustrating its application to a helical brush strip;

Figure 4 is a further modified form of the invention showing a modified form of an anchoring means for the brush strip;

Figure 5 is a transverse sectional view taken along the line 5-5 of Figure 4 and looking in the direction of the arrows.

Referring now to the drawing in detail and more particularly to Figure 1 thereof, there is shown an agitator roll particularly designed for use in the suction mouth of a suction cleaning device such as the arrangement illustrated in U. S. Letters Patent 1,907,692, issued to H. B. White, May 9, 1933.

The brush roll comprises a main body or drum portion In depressed in its center to form a pulley seat II. The ends of the drum I0 each telescope over an enclosure and bearing seat I2 and abut end flanges I3 thereon. Preferably the fit between the elements l2 and I0 is a frictional one, however spot Welding'or other additional securing means may be utilized if desired. Each element 'I2'includes a central bearing seat cup I4 in which is received the bearing structure I5 ro-' tatably supporting the body structure I0 and the seat and bearing structure I2 upon a stationary shaft I6 which passes through and is journaled in the bearing structure I5. Suitable dust caps II are'secured to the projecting ends of the shaft I6 to form a dust shield around the exposed faces of the bearing structures I5.

The brush roll body I9 is deformed on each side of the pulley portion I I to form brush receiving seats. This is accomplished by deforming the metal of the body III to form an L-shaped seat consisting of a short inwardly extending wall portion I8 which is substantially parallel to a radius of the drum IE but offset to the right thereof as viewed in Figure 2. The short wall I8 joins a longer wall I9 which is normal to the wall I8 and to the radius to which the wall I8 is parallel thus forming a substantially L-shaped indentation in the surface of the drum I0. The inner end of each of the seats formed by the walls I8 and I9 is separated from the ends of the pulley portion I I by a slitting operation before the metal is deformed. The inner ends of the brush seats are closed by wall plates 29 having the configuration of the brush seat in cross-section and provided with short forwardly extending tabs or. tongues 2I which are spot welded to the upper faces of the surface I9 so as to'close the inner ends of the brush seats. The outer ends of the brush seats are closed by the peripheral flange portion I3 of the bearing cup housing structure I2.

One or more slightly inwardly depending lances 22 are preferably formed in the wall I9 adjacent the point at which it joins the periphery of the drum II] to form anchoring shoulders for a purpose to be described hereinafter.

A continuous brush strip consisting of bristles 24 and a channel-shaped metal backing 25 is provided for use with the drum I 9. The channel backing 25, see Figure 2, is seated in the angle formed by the junction of the walls I8 and I9. The brushes of this known type consist preferably of the type consisting of a plurality of bristles looped over a wire with the bight portions of the bristles and the wire lying within a metallic channel which is then pinched tightly against the bristles to bring the projecting portions of the bristles on the two sides of the wire together and to anchor the whole assembly in the metal backing. This type of construction may be made in the form of a continuous strip which is then cut to desired lengths as the strip is utilized. This type of strip is also made up in predetermined lengths with the end portions of the channel bent over to form closures at the ends of the individual brush strip. L contemplate using these" and various other types of continuous strip brushes in my improved brush roll construction.

due to the aforesaid pinching operation. For this reason the wall I8, though generally paral lel to an offset radius of the roll body l0, is in the form of a fiat 8 curve. This configuration of the wall I8 allows the fiat bight portion of the channel to rest flat on wall I9 with one side of the bulbous base fitting snugly into thecurved junction of walls [8 and [9. Also the wall I8 engages one upper side edge of the channel to provide firm lateral support. The outer end of wall is" also curved into a junction with the cylindrical surface of the roll I0 to provide a rounded surface over which the bristles 24 may bend when brushing a surface undergoing cleaning.

The brush strip is secured in position upon the brush roll by a clamping plate which is in the forin of a very shallow channel in cross section and is provided with tabs or shoulders 3| which engage against the inwardly facing shoulders formed by the latices 22 in the wall I 9. The other edge of the channel 30' engages one side face of the metallic channel 25 above the bulbous base pertion thereof to hold the brush structure firmly against the walls I8 and I 9 at the angle formed by their junction point. The clamping strip 39 is secured in place and moved into tight Wedging engagement with the channel 25 and shoulders 3| by means of a self-tapping screw 33 seated in a depression 34 formed in the strip 30. The self-tapping screw engages in a suitable opening 35 formed in the wall I9 to receive it. When the screw 33 is tightened the clamping plate 39 is drawn toward the wall [9 thus wed ging the brush back 25 firmly against the supporting walls I 8 and I9 at their junction point. 7'

The foregoing assembly provides a construction by which an inexpensive continuous brush strip can readily be mounted in an agitator body with a single securing screw or bolt and can readily be removed requiring only a screw driver for that purpose. It is also to be noted that the brush strip *extends the full length of the agita tor on each side of the pulley portion I I thereof out to the very "end of the agitator body and substantially in contact with the end shield structure I2 so that the full length of the body structure H] is an active brush bearing area and no securing means are necessary at the end of the brush strip.

As shown most clearly in Figure 2 it will be seen that the securing tongues 2I for the end closure plates 20 of the brush seats rest upon the plates I9 outwardly of the portions thereof whieh actually "contact the brush backs 25 and that the clamping plates '30 overlie and seal the securing tehgues from view when the apparatus is in assembled operating form.

In the form of the invention illustrated in Figure 1, the agitator roll is provided with one brush strip on each side of the pulley structure l'l displaced 180 from each other, however, other arrangements are within the purview of the "invention ananiere than-ene brush strip may The base of the channel 25 is slightly bulbous 4 be utilized on each end of the agitator if de-- sired with various angular spacings with respect to each other. As shown in Figure 1, the brush roll structure is also provided with a helical rigid agitator bar 3'! on each side thereof and spaced approximately from the brush strip on the same side of the pulley therewitha The form of the invention shown in Figure 3 is identical with that shown in Figures 1 and 2 1 except that the bristle strip, its supporting seat in the brush body I0, and its securing means are all formed on a helix having a pitch of approximately Il in contrast to the straight bristle strips parallel to the axis of rotation of the brush ,roll body illustrated in Figures 1 and 2.

the body H1 upon which these are se-' cured are all formed on an approximately 11 helix. Other pitch helices are within the scope of the invention. The helix illustrated is. one which has been foundv to be very satisfactory in practice.

'In Figures l and 5', a thirdmodification of the invention is illustrated. which differs from the modifications of Figures 1. and 2- principally in the construction of the securing means for the brush bristle strip.

In this form of the invention the brush roll body structure 59 is provided with a central depressed portion forming a pulley 5| and is provided with an end bearing structure, not shown, which is identical to that shown in Figure 1. A portion of the. periphery of the drum or body 50 is depressed to form an L-shaped brush strip seat comprising a slightly S-shaped wall 53 generally parallel to a radius of the drum 5-0 which meets a substantially flat longer wall portion 54 normal to the aforesaid radius. The slight sshape of the wall .53 isdesigned to accommodate and engage the side face of a brush strip backing or base 55 which is identical with the brush strip construction Z l-and 25 described in connection with Figures 1 and 2. The wall 54 is provided with a continuous depression 56 to form an abutting shoulder for a purpose to be described hereinafter. The depression 55 does not extend the full extent of the wall 54 between the end bearing structure and the pulley as will become r oreapparent later. The brush strip is secured in side abutting engagement with the wall 53 and in seating engagement with the wall 54 at their point of junction :by a spring clamping strip 51 extending the major portion of the length of the brush :strip but stopping short of the ends thereof as more clearly shown in Figure 4. The outer end of the spring strip 51 is turned over as indicated at 53 to abut the shoulder formed by the-depression 56. The inner end of the spring '51 is provided with a plurality -of spaced curved engaging tabs 59 which .abut the outer side face of the backing strip '55 of .the brush structure to provide a plurality of points at which the clamping action of thespring strip 5! is applied. A pair of self-tapping-screws 39, which are 'sim-ilar'to the screw :3-3 as described in connection with Figure 1, extend through the clamping spring 5! and are screwed into the wall 54. When the screws (ill are drawn up tightly the various "contacting tabs 59 on the spring strip '51 grew-edged into engagement with the backing strip 55 which in turn wedges the brush strip into the angle between the walls 53 and 54 at their juncture providing a rigid and secure attachment between the brush strip and the brush roll body 56.

As shown in Figure 4, the strip 51 does not extend the full length of the brush strip, however, this has been found to be unnecessary for most service conditions. This leaves exposed the tab Bl which corresponds to the tab 2| of Figures 1 and 2 for securing the end closure of the brush seat to the brush roll body.

In this form of the invention the securing means for the brush strip is shorter and lighter than that shown in Figures 1 and 3 but do not give as finished an appearance.

The brush receiving indentations in the brush roll have been shown and described herein as having an L.-shape in which the two walls forming the seat meet at substantially 90. However, it is within the scope of the invention to vary this relation. It is only necessary that the brush seat be formed as an indentation in the periphery of the brush roll with a brush seated therein and wedged in position against the walls of the indentation by a readily accessible and removable clamping strip,

All forms of the invention provide a very convenient means for securing a strip type bush to an agitator body by a simple mechanical means which is readily removable for replacement of the brush. The attaching means are always exposed for adjustment or removal of the brush and are entirely within the periphery of the cylindrical brush roll so that they will never contact the surface being cleaned. The present construction has been found to be simple, economical and reliable in operation.

While I have illustrated and described the invention in considerable detail, it is to be understood that various changes may be made in the arrangement, proportion and construction of parts without departing from the spirit of the invention or the scope of the appended claims.

I claim:

1. A brush roll for cleaning tools comprising a cylindrical body portion having a longitudinally extending indentation formed therein, said indentation comprising a first wall portion which is substantially normal to a radius of said body portion, a second reversely curved wall portion which is substantially normal to said first wall portion and meeting said first wall portion to define an L-shaped seat for a brush strip, a brush strip comprising an elongated row of bristles secured to a backing member, said backing member being seated in said indentation at the junction of said wall portions and havin a wide base portion resting on said first wall and partly underlying a part of said second wall, a deformation in said first Wall portion forming a shoulder spaced from said backing member and said second wall portion, a clamping member having one portion engaging said backing member in spaced relation to said first wall portion and another portion engaging said shoulder, and means for drawing said clamping member toward said first wall portion to wedge said backing member against said wall portions at the junction thereof.

2. A brush roll for cleaning apparatus compr sing a cylindrical body having an elongated indentation in the periphheral portion thereof, said indentation including two wall portions positioned in angular relation to each other, a

brush comprising a row of bristles carried by a base member, said base member being positioned in said indentation with spaced portions thereof engaging said wall portions, one of said wall portions having'a shoulder formed therein in spaced relation to and facing said base member, a clamping member comprising an elongated spring plate having a plurality of spaced projecting spring tabs on one long edge thereof, the edge of said plate opposite said tabs engaging said shoulder and the said tabs engaging a portion of said base member spaced from both said wall portions, and means tensioning said spring plate in a manner to urge said tabs toward said. one wall.

3. A brush roll for cleaning devices comprising a generally cylindrical body portion formed with an indented L-shaped seat defined by a first wall extending in a direction generally parallel to a radius of said body portion and a second wall generally normal to said radius of said body portion, a brush strip having bristles projecting outwardly of said cylindrical body portion and a back resting in said L-shaped seat engaging each of said Walls, said second wall having an abutment portion in spaced relation to said brush back, a clamping plate having one edge engaging said brush back in spaced relation to said second wall and another edge engaging said abutment, and means urgin said plate toward said second wall to wedge said brush back in said seat, said abutment portion and said clamping plate being a lesser distance from the axis of said cylindrical body portion than the unindented portions thereof.

4. A brush roll for cleaning devices comprising a generally cylindrical body portion formed with an elongated indentation defining a seat formed by a pair of angularly related walls, a brush strip having bristles projecting outwardly of said body portion and a back in said seat engaging each of said walls, one of said walls being formed with a shoulder in spaced relation to the other of said walls and said back, a clamping plate having one edge engaging said back in spaced relation to each of said walls and anotheredge engaging said shoulder, and a securing mem-- ber engaging said one wall and said plate and, biasing said plate toward said one wall to wedge: said back in said seat, said plate and said shoulder and said securing member being at a lesser distance from the axis of said cylindrical body portion than the unindented portion thereof.

5. A brush roll for cleaning apparatus comprising a cylindrical body member formed with an elongated indentation facing outwardly of said body member and defined by a pair of angularly intersecting wall portions, one of said wall portions having a greater extent inwardly of the cylindrical body member than the other of said wall portions and bein formed with a shoulder positioned in spaced relation to said other Wall portion, a brush back seated in said indentation between said shoulder and said other wall portion and engaging each of said wall portions, brush bristles projecting from said brush back outwardly of said cylindrical body member, a clamping member engaging said shoulder and extending at an angle to said one wall portion and engaging said brush back in spaced relation to each of said wall portions, and means biasing said clamping member toward said one wall to wedge said brush back against each of said wall portions, said abutment and said clamping member being at a lesser distance from the center of 7- Said y indni a 129,22 m q bfi? he 2mm mb drentedhqzt ion-tnerqqf g. 2261 781 '0 LQUI Ee 237L553 2,297,366 RefQmnces, Cited in the file. of this payent. 5 2,379,205 UNITED susAmEs BATIENIES. Number ame' Da e 435,304 Hendrh0t Aug; 26, 1890; 7 79 i -".'-7 2 9 10 Number 2,045,270 Home; June 23; 1,936 91,495 2,178,590 m P1$Z..-.+v- -Y- 7 a at 2 Smellie Q NOV. 4, 1941 Smellie, V Feb. 3, 1942, Pierce Sept. 29., 1942 Wesineyer Jung 26, 1945 Grzelczk Sept. 26, 1950 Rowland Feb. 20, 1951 FOREIGN PATENTS Coun y ate Sweden Feb. 17, 1938

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