US 3,939,521 A · Brush construction

Abstract

A rotary brush construction, particularly for a top brush for washing vehicles including elongate bristles carried on a perforate hollow cylindrical core of relatively small diameter. A plurality of axially short collar units secure the core on a shaft for rotation therewith and are spaced along the inside of the core. The collars each comprise a hub fixed to the shaft and, in one embodiment, a shell radially spaced from the hub by radial web members, for carrying the core. Tension members extend from the hub through the shell and hold the core to the shell. The collars occupy minimal cross-sectional area within the core. Lubricant liquid streams enter the opposite core ends and pass inward through the collars for substantially uniform distribution of liquid within the core. The liquid passes out through the core perforations to lubricate the bristles. The core preferably comprises plural longitudinal sections having differing bristle densities. The core and collar are preferably circumferentially segmented, the collar segments being secured together at the web members thereof. In a modification, a disc extends radially outward from an end of the core to prevent bristle entanglement with brush supports and liquid feed lines. In another embodiment, each hub is secured by radial tension members and spacers to the core, without the said shell, and axially outer hubs are of lesser diameter than axially inner ones.

Claims16

Dependent claims

A rotary brush construction, particularly for top washing of vehicles, and adapted for mounting on a rotary shaft, comprising:

a hollow cylindrical perforate core means mounting brush bristles thereon and adapted to loosely receive the shaft therethrough;
at least a pair of split annular means spaced axially from each other within the core means for securing the core means to the shaft, each said annular means being mounted on the shaft for rotation therewith and having a substantially cylindrical outer surface means spaced radially from the shaft for backing the core, substantially radially extending portions associated with the annular means for circumferentially positioning the core means relative to an annular means, and tension means for pressing the core means against the annular means;
said annular means comprising a collar having a hub mounted on the shaft for rotation therewith and a cylindrical shell spaced radially from the hub for backing the core means, said cylindrical shell defining thereon said outer surface means, said radially extending protions comprising web members extending radially between the shell and the hub for fixing the shell to the hub;
said tension means extending radially from said hub past said shell and through said core, said hub, shell and core being circumferentially segmented, each corresponding hub segment, shell segment and core segment being of substantially similar circumferential extent, there being a one said tension means extending in circumferentially intermediate location from such hub segment past the corresponding shell segment and through the corresponding core segment to hold the core segment snugly against the shell segment.

1 more element

A rotary top brush construction for washing of vehicles, and adapted for mounting on a rotary shaft, comprising:

a hollow cylindrical perforate core fixedly mounting brush bristles and adapted to loosely receive said shaft therethrough, said core being diametrally split to provide opposed core halves having opposed longitudinal edge notches which open radially inward and toward each other;
a plurality of solid substantially planar and diametrally split collar disks spaced axially within the core, each disk half having diametrally extending tabs snugly seated in said notches in the length edges of said core segments, each said disk half having a radially extending spacing element at its periphery against which the opposed core half abuts, portions of the disk periphery between the spacing element and tabs being radially spaced from the inner wall of the core and defining axial through liquid passages;
diametrally opposed threaded tension means substantially circumferentially centered on said core and disk halves at said spacing elements and extending through mounting openings in said core halves into the opposed peripheral edges of said disk halves for radially fixing the central part of each core half on the corresponding disk half;
chordal means on opposite sides of said shaft for securing the halves of said disk together with said shaft centrally sandwiched therebetween;
nozzle means for discharging liquid into an end of said core.

2 more elements

A rotary brush construction, particularly for top washing of vehicles, and adapted for mounting on a rotary shaft, comprising:

a hollow cylindrical perforate core means mounting brush bristles thereon and adapted to loosely receive the shaft therethrough;
at least a pair of split annular means spaced axially from each other within the core means for securing the core means to the shaft, each said annular means being mounted on the shaft for rotation therewith and having a substantially cylindrical outer surface means spaced radially from the shaft for backing the core, substantially radially extending portions associated with the annular means for circumferentially positioning the core means relative to the annular means, and tension means for pressing the core means against the annular means;
said core means comprising a pair of longitudinally aligned cylindrical core sections having adjacent ends overlapping the outer surface means of one said annular means, so that said outer surface means extends into both said core sections, said tension means of said one annular means comprising elongate members extending substantially radially from the annular means and into fixed releasable engagement with corresponding ones of said core sections for holding the core section ends against said annular means and for preventing axial separation of said core sections.

A rotary top brush construction for washing of vehicles and mountable on a rotary shaft, comprising:

an elongated cylindrical core having outwardly projecting similar length bristles distributed circumferentially and axially over the surface thereof and forming a substantially continuous cylindrical wall of bristle tips circumferentially of and surrounding said core, said core comprising separate but axially adjacent cylindrical core sections, including an elongate intermediate core section and a pair of shorter flanking end core sections, and means for reducing entanglement of brush bristles with projecting trim items at and adjacent the sides of the vehicle to be washed and comprising an axial distribution density of brush bristles on the end core sections which is substantially less than the axial distribution density of brush bristles on said intermediate core section;
a plurality of collar means spaced axially along and fixed to said shaft for rotation therewith, ones of said collar means being disposed adjacent the outer ends of said end core sections for coaxially supporting same on said shaft for rotation therewith, and others of said collars being axially disposed at the axial interfaces between adjacent core sections for axially joining same together and coaxially fixing same to said shaft for rotation therewith.

Dependencies are inferred from the claim text.

Brush construction

Life of this patent

Brush construction

Life of this patent

Abstract

Claims16