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US 12,618,205 B2Granted
Pavement grinding drum having modular bit mountings
AssigneeGraco Minnesota Inc.
InventorsJames C. Schroeder, Daniel D. Rohling, Roland M. Bedard
Life of this patent
Estimating the term…
Abstract
A pavement grinder is configured to rotate to remove pavement. The pavement grinder includes a pavement grinding drum with bit mountings mounted to the pavement grinding drum. The bit mountings are individually removable from and replaceable on the drum. The bit mountings each include a bit that is configured to engage with the pavement to remove pavement.
Claims17
A grinding drum for grinding hardened material, the grinding drum comprising:
- a mounting tube, the mounting tube elongate along a tube axis, the mounting tube have a plurality of bit mounting receivers arrayed circumferentially around and longitudinally along the mounting tube;
- and
- a plurality of bit mountings respectively received in the plurality of bit mounting receivers, the plurality of bit mountings comprising a plurality of bits wherein a first bit mounting of the plurality of bit mountings is mounted to a first bit mounting receiver of the plurality of bit mounting receivers;
- the first bit mounting receiver comprising:
- an outer recess extending into the mounting tube from an exterior of the mounting tube;
- and
- an inner receiver extending into the mounting tube from the outer recess;
- the first bit mounting comprising:
- a first bit holder supporting a first bit of the plurality of bits, the first bit holder including a stem and a head, wherein the stem is at least partially disposed in the outer recess and the first bit is mounted to the head;
- a mount fastener that extends through the stem and the head of the first bit mounting and extends into the first bit mounting receiver;
- wherein the plurality of bit mounting receivers are disposed in at least one mounting array and wherein the at least one mounting array is disposed helically about the mounting tube.
8 more elements
A grinding drum for grinding hardened material, the grinding drum comprising:
- a mounting tube, the mounting tube elongate along a tube axis, the mounting tube have a plurality of bit mounting receivers arrayed circumferentially around and longitudinally along the mounting tube;
- and
- a plurality of bit mountings respectively received in the plurality of bit mounting receivers, the plurality of bit mountings comprising a plurality of bits, wherein a first bit mounting of the plurality of bit mountings is mounted to a first bit mounting receiver of the plurality of bit mounting receivers;
- the first bit mounting including a first bit holder supporting a first bit of the plurality of bits, the first bit holder including a stem and a head, the stem at least partially disposed in the first bit mounting receiver and the first bit connected to the head;
- the mounting tube including a first slot extending from a trailing end of the first bit mounting receiver;
- wherein the first bit holder is mounted to the first bit mounting receiver such that a trailing end of the first bit holder extends over the slot and is spaced away from a base of the slot;
- wherein each bit mounting of the plurality of bit mountings is individually removably mounted to the mounting tube;
- and
- wherein each bit mounting of the plurality of bit mountings is angled offset from the tube axis.
6 more elements
A grinding drum for grinding hardened material, the grinding drum comprising:
- a mounting tube, the mounting tube elongate along a tube axis, the mounting tube have a plurality of bit mounting receivers arrayed circumferentially around and longitudinally along the mounting tube;
- and
- a plurality of bit mountings respectively received in the plurality of bit mounting receivers, the plurality of bit mountings comprising a plurality of bits wherein a first bit mounting of the plurality of bit mountings is mounted to a first bit mounting receiver of the plurality of bit mounting receivers;
- the first bit mounting receiver comprising:
- an outer recess extending into the mounting tube from an exterior of the mounting tube;
- and
- an inner receiver extending into the mounting tube from the outer recess;
- the first bit mounting comprising:
- a first bit holder supporting a first bit of the plurality of bits, the first bit holder including a stem and a head, wherein the stem is at least partially disposed in the outer recess and the first bit is mounted to the head, wherein the head extends forward and rearward of the stem;
- wherein a leading surface of the stem includes a first flat, a leading wall of the outer recess includes a second flat, and the first flat interfaces with the second flat to inhibit rotation of the stem within the outer recess, wherein the outer recess includes a first side wall and a second side wall extending from the leading wall, and wherein the first side wall and the second side wall are curved;
- wherein the plurality of bit mounting receivers are disposed in at least one mounting array and wherein the at least one mounting array is disposed helically about the mounting tube.
8 more elements
Dependencies are inferred from the claim text.