US3675543A - Automatic raker - Google Patents

Abstract

A rotatable brush and heater pivotally mounted beneath a frame for movement over the ground.

Description

[451 July 11, 1972 United States Patent Neal mm Jm m 8 H 9 1 AU K RAKER 1,921,688 3/1933 McLaughlin............. [72] Inventor: John M. Neal, 512 Yolo Avenue. Oroville, lzngos lngersollwm" nt 959 5 l.868,\70 7/1932 453,953 [22] Filed: Jan. 18, 1971 Primary ExaminerJacob L. Nackenotf Attorney-Alexander B. Blair [2]] App]. No.:

[ ABSTRACT A rotatable brush and heater pivotally mounted beneath a frame for movement ever the groundv .94/39, 15/159 A. 94/44 .EOlc 23/00 15/159 A; 94/44, 45. 39

s21 (58] FieldofSearch.....4 4..................

[56] References Cited UNITED STATES PATENTS 3,459J09 8/1969 Ingleright..............

3 Chins, 5 Drawing figures sum 2 or 2 IN VEN TOR. do/nv M. lVfAL llg'oe/v EY.

AUTOMATIC RAKER This invention relates to a device for cleaning material ofl an old slab while evenly joining it with a new slab with regard to pavement on the ground.

A primary object of this invention is to even up paved portions with old portions of a road in a single operation so that the road is immediately prepared for traffic thereover.

Another object of this invention is the provision of means so that the apparatus is self-cleaning.

The above and other objects of this invention will become apparent to those skilled in the art after a consideration of the detailed description of a preferred embodiment of thisinvention taken together with the accompanying drawing wherein:

FIG. 1 is a plan view of the apparatus;

F IG. 2 is a side elevational view thereof;

FIG. 3 is a sectional view taken on line 3-3 of FIG. 2;

FIG. 4 is a sectional view taken on line 4-4 of FIG. 2; and

FIG. 5 is a plan view of the entire apparatus illustrated in use on a road.

Referring in detail to the drawing, there is shown in FIG. 5 a vehicle with a rear container 22 which holds material and spreads it over the roadway 24 as vehicle 20 moves therealong. Slidably attached to the rear of the container 22 is a frame 25 having a brush and blade unit 26 pivotally mounted therebelow and a motor 28 for rotating the brush of unit 26.

As best seen in FIG. 3, frame 25 is comprised of a plate 30 having a pipe 32 along each longitudinal end thereof for support. Motor 28 is connected to a wire brush 34 for rotation thereof via a flexible drive shaft 36. Encasing a portion of the circumferential surface of wire brush 34 is an arcuate housing 38 comprising an inner blade 40 and an outer removable wall 42 enclosing heating elements 44 attached to wall 42. As shown in greater detail in H0. 4, a housing 46 comprising straight blade 48 and removable wall 50 to which is attached a heating element 52 enclosed within housing 46 extends outward longitudinally from one end of wire brush 34 and housing 38.

Heating elements 44 and 52 prevent material from sticking to the blades and also heats up wire brush 34 which makes physical contact at the extremity thereof with inner blade 40.

As shown in FIGS. 1 and 2, a rod 60 extends upward from housing 38 through an arcuate slot 62 within plate 30. Rod 60 is slidably moved within slot 62 as housing 42 pivots about the longitudinal axis of a shaft 64 connected between housing 38 and the bottom surface of plate 30. Plate 30 has a pair of shafts 66 extending upward from one end thereof adjacent container 22 slidably mounted within a pair of sleeves 68 secured to the rear of container 22, each shaft 66 having a head 70 against which one end of a spring 72 is engaged, the other end of spring 72 being pressed against the upper end of sleeve 68 thereby acting as a shock absorber while holding plate 30 to the proper height for the raking operation. The dotted line in HG. l is representative of the joint between the new paved layer 24 and the old paved layer 27 at which point blade 40 and brush 34 even out the abutting layers while blade 48 cleans any unwanted material from the old pavement.

While a preferred embodiment has been illustrated and described, it will be apparent to those skilled in the art that many changes and modifications may be resorted to without departing from the spirit and scope of the invention.

lclaim:

I. An automatic raker attachment for a paving machine comprising a generally horizontal plate, means for detachably securing said plate to the rear of said paving machine in rearward extending relation, a rotary brush on a horizontal axis secured to and underlying said plate for pivotal movement about a vertical axis for angular adjustment, and a heated hood immediately adjacent the rear side of said rotary brush and movable therewith.

2. A device as claimed in claim 1 including a power drive means for said brush mounted on said plate.

3. A device as claimed in claim 2 wherein said power drive means is connected to said brush by a flexible drive cable.

Claims (3)

1. An automatic raker attachment for a paving machine comprising a generally horizontal plate, means for detachably securing said plate to the rear of said paving machine in rearward extending relation, a rotary brush on a horizontal axis secured to and underlying said plate for pivotal movement about a vertical axis for angular adjustment, and a heated hood immediately adjacent the rear side of said rotary brush and movable therewith.

2. A device as claimed in claim 1 including a power drive means for said brush mounted on said plate.

3. A device as claimed in claim 2 wherein said power drive means is connected to said brush by a flexible drive cable.

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