Mower with front caster wheel suspension

Patent metadata

Field	Value
Publication number	US-9327553-B2
Application number	US-201414310250-A
Country	US
Kind code	B2
Filing date	Jun 20, 2014
Priority date	Jun 20, 2014
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

A lawn maintenance vehicle caster wheel assembly includes a suspension and a fork. The fork is rotatably connected to a structural member of the lawn maintenance vehicle. The caster wheel assembly also includes an arm connected to the fork, and the arm is rotatable about an arm axis. The caster wheel assembly further includes a caster wheel mounted to the arm and is rotatable about a wheel axis. A damping member is attached to the fork and the arm such that the caster wheel and the arm can rotate about the arm axis.

First claim

What is claimed is:

1. A lawn maintenance vehicle caster wheel assembly including a suspension comprising:
a fork, wherein said fork is rotatably connected to a structural member of an associated lawn maintenance vehicle;
an arm, wherein said arm is rotatably connected to said fork at a first location, wherein said arm is rotatable about an arm axis;
a caster wheel mounted to said arm, wherein said caster wheel is rotatable about a wheel axis; and
a damping member, wherein said damping member is attached to said fork and said arm such that said caster wheel and said arm can rotate about said arm axis;
wherein said arm includes a first end point, a second end point, and a first pivot point such that a first line between said first end point and said first pivot point forms a non-linear angle with a second line between said second end point and said first pivot point;
wherein said damping member urges said first end point of said arm toward said fork, to rotate said arm about said first pivot point;
wherein said damping member is a coil spring, and wherein said coil spring includes a central axis, and said central axis is oriented in a substantially horizontal orientation.

2. The lawn maintenance vehicle caster wheel assembly according to claim 1 , wherein said caster wheel is rotatable about a vertical axis.

3. The lawn maintenance vehicle caster wheel assembly according to claim 1 , wherein said arm is connected to said fork at said first location and at a second location through said damping member.

4. The lawn maintenance vehicle caster wheel assembly according to claim 1 , wherein an elastic potential energy within said coil spring is adjustable to affect a stiffness of said suspension.

5. The lawn maintenance vehicle caster wheel assembly according to claim 4 , further including a threaded fastener, wherein said elastic potential energy within said coil spring is adjusted by said threaded fastener.

6. The lawn maintenance vehicle caster wheel assembly according to claim 5 , wherein said threaded fastener is located within a central space of said coil spring.

7. A lawn maintenance vehicle caster wheel assembly including a suspension comprising:
a fork, wherein said fork is rotatably connected to a structural member of an associated lawn maintenance vehicle;
an arm, wherein said arm is rotatably connected to said fork at a first location, wherein said arm is rotatable about an arm axis;
a caster wheel mounted to said arm, wherein said caster wheel is rotatable about a wheel axis;
a damping member, wherein said damping member is attached to said fork and said arm such that said caster wheel and said arm can rotate about said arm axis;
a pin attached to said arm, wherein said pin defines an aperture; and
a threaded fastener, wherein said threaded fastener is threadingly engaged with said aperture.

8. The lawn maintenance vehicle caster wheel assembly according to claims 1 or 7 , wherein said fork comprises:
a first fork side; and
a second fork side, wherein the first fork side and the second fork side are located on opposing sides of said caster wheel.

Assignees

• Mtd Products Inc

Inventors

• Woodrum Adam

Classifications

• B60B2900/551

  Handling of obstacles or difficult terrains · CPC title

• B60G17/00

  Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load {(levelling or stabilising systems for tippers B60P1/045)} · CPC title

• B60G11/16

  characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle · CPC title

• A01D34/64

  mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle (A01D34/695 takes precedence) · CPC title

• B60G2300/084

  Ridable lawn mowers · CPC title