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US 10,851,523 B2Granted
Retention system for motor grader bits
AssigneeCaterpillar Inc.
InventorsDavid Bruno Parzynski, Jr., Thomas Marshall Congdon
Life of this patent
Estimating the term…
Abstract
A tool bit is disclosed. The tool bit includes a working portion at a distal end of the tool bit, a threaded portion at a proximal end of the tool bit, a shank extending along a longitudinal axis of the tool bit between the working portion and the threaded portion, and an anti-rotation receiving hole located on the threaded portion. The anti-rotation receiving hole extends through the threaded portion transverse to the longitudinal axis. The threaded portion of the tool bit is configured to engage with threads of a nut, and the anti-rotation receiving hole is configured to receive a pin inserted through the nut.
Claims17
A tool bit comprising:
- a working portion at a distal end of the tool bit, the working portion having a top and a bottom, the working portion comprising a cutting surface disposed at the top of the working portion, the working portion extending lengthwise along a working-portion axis disposed between the cutting surface and the bottom of the working portion, the working-portion axis angled downward from a longitudinal axis of the tool bit such that the top of the working portion extends below the longitudinal axis, the cutting surface disposed between the longitudinal axis and the working-portion axis, the cutting surface having a planar shape;
- a threaded portion at a proximal end of the tool bit configured to receive a nut, wherein the threaded portion comprises threads on an outer surface of the threaded portion to receive the nut, the threaded portion centered about and extending along the longitudinal axis of the tool bit;
- a shank extending along the longitudinal axis of the tool bit, the shank extending between the working portion and the threaded portion, wherein the longitudinal axis intersects the working-portion axis;
- and
- an anti-rotation receiving hole located on the threaded portion, the anti-rotation receiving hole extending through the threaded portion transverse to the longitudinal axis, wherein the threaded portion of the tool bit is configured to engage the threads of the nut and the anti-rotation receiving hole is configured to receive a pin inserted through the hole.
2 more elements
A securing system for a tool bit of a motor grader, the securing system comprising:
- the tool bit having:
- a working portion at a distal end of the tool bit, the working portion having a top and a bottom, the working portion comprising a cutting surface disposed at the top of the working portion, the working portion extending lengthwise along a working-portion axis disposed between the cutting surface and the bottom of the working portion, the working-portion axis angled downward from a longitudinal axis of the tool bit such that the top of the working portion extends below the longitudinal axis, the cutting surface disposed between the longitudinal axis and the working-portion axis, the cutting surface having a planar shape, the working portion including an anti-rotation segment that is a flat side configured to prevent rotation of the tool bit about the longitudinal axis;
- a threaded portion at a proximal end of the tool bit configured to receive a fastener, the threaded portion centered about and extending along the longitudinal axis of the tool bit, the longitudinal axis intersecting the working-portion axis;
- a shank extending along the longitudinal axis of the tool bit, the shank extending between the working portion and the threaded portion;
- and
- an anti-rotation receiving hole extending through the threaded portion transverse to the longitudinal axis, wherein the threaded portion of the tool bit is configured to engage with threads of a nut, and the anti-rotation receiving hole is configured to receive a cotter pin inserted through the nut;
- the nut configured to engage with the threaded portion of the tool bit;
- and the cotter pin to be inserted through the anti-rotation receiving hole and the nut.
5 more elements
A tool bit comprising:
- a shank extending along a longitudinal axis of the tool bit, the shank having an internally threaded portion configured to receive a retention bolt;
- and
- a working portion at a distal end of the tool bit, the working portion having a top and a bottom, the working portion comprising a cutting surface disposed at the top of the working portion, the working portion extending lengthwise along a working-portion axis disposed between the cutting surface and the bottom of the working portion, the working-portion axis angled downward from a longitudinal axis of the tool bit such that the top of the working portion extends below the longitudinal axis, the cutting surface disposed between the longitudinal axis and the working-portion axis, the cutting surface having a planar shape, the working portion having an anti-rotation segment having a flat side configured to engage an anti-rotation slot of an adapter board to prevent rotation about the longitudinal axis and the working-portion axis, wherein the working-portion axis intersects the longitudinal axis.
Dependencies are inferred from the claim text.