# US 9,039,323 B2 · Grinding attachment

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- Number: US 9,039,323 B2
- Document ID: US9039323B2
- Status: Granted
- Kind: B2
- Application number: 13/836,975
- Filed: 2013-03-15
- Published: 2014-09-18
- Granted: 2015-05-26
- Earliest claimed: 2013-03-15
- Assignees: Seovic Civil Engineering PTY LTD.
- Applicants: Seovic Civil Engineering Pty Ltd.
- Inventors: Jason John Seovic
- Web page: https://patentgrep.com/patent/US9039323B2

## CPC

- E01C 23/088: Rotary tools, e.g. milling drums {(for forming recesses to receive marking materials E01C23/0946)}
- E01C: CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR (forming roads or like surfaces by compacting or grading snow or ice E01H)

## Abstract

A grinding attachment for highways and similar surfaces is disclosed for grinding operations closer to adjacent obstacles than is possible with existing equipment using a straddle-type centrally mounted grinding drum. The grinding attachment assembly comprises at one end a stub axle, which engages the grinding drum via a head extension. The stub axle is attached to a shroud which is in turn supported by a mounting assembly, which in operation attaches to a vehicle or machine able to drive the grinding attachment. The grinding drum can thereby operate proximal obstacles adjacent a grinding surface by virtue of arrangement of the stub axle, shroud and mounting assembly.

## Claims

### Claim 1

A grinding attachment mountable on an existing main shaft of a highway grinding vehicle, the grinding attachment comprising:
a longitudinally oriented arbor extension for mounting grinding blades and spacers thereon to form a grinding drum, the arbor extension being adapted at one end for direct mounting on the existing main shaft of the highway grinding vehicle, thereby supplying a source of torque to the grinding attachment;
a floating stub axle having a bearing internal to, and located within, the arbor extension which operatively engages the arbor extension at an opposite end of the arbor extension; and
a mounting assembly to support the floating stub axle and mount the grinding attachment to the highway grinding vehicle;
wherein the grinding drum can thereby operate proximal to obstacles adjacent a grinding surface, and wherein the grinding attachment is mountable to the existing main shaft of the highway grinding vehicle.

### Claim 2 (depends on 1)

A grinding attachment according to claim 1, further comprising a retaining ring mounted on a longitudinal end of the arbor extension proximal the existing main shaft, and a clamping ring mounted on an opposite longitudinal end of the arbor extension distal the existing main shaft, said respective rings engaging the arbor extension by co-operating screw threaded engagement, wherein the retaining ring and clamping ring co-operate to retain blades and spacers on the arbor extension during operation.

### Claim 3 (depends on 1)

A grinding attachment according to claim 1, wherein the mounting assembly comprises two or more mounting beams, a frame, and a protective shroud, wherein the protective shroud has a structural end plate removable attachable to the floating stub axle.

### Claim 4 (depends on 1)

A grinding attachment according to claim 1, wherein the arbor extension has at least partly along its longitudinal length a key structure for mounting grinding blades and spacers.

### Claim 5 (depends on 1)

A grinding attachment according to claim 1, further comprising a removably attachable rubber skirt comprising a number of rubber flaps.

### Claim 6 (depends on 3)

A grinding attachment according to claim 3, further comprising primary and secondary vacuum heads attached to the protective shroud.

### Claim 7 (depends on 1)

A grinding attachment according to claim 1, wherein the bearing of the floating stub axle is an internal tapered drum bearing mounted within the arbor extension in co-operation with the floating stub axle.

### Claim 8 (depends on 7)

A grinding attachment according to claim 7, wherein the internal tapered drum bearing is retained by a bearing retaining clip and a seal retainer.