Zero-turn radius lawnmower with suspension system
US-2019016214-A1 · Jan 17, 2019 · US
Work vehicle
US11246263B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11246263-B2 |
| Application number | US-201916430880-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 4, 2019 |
| Priority date | Jun 4, 2019 |
| Publication date | Feb 15, 2022 |
| Grant date | Feb 15, 2022 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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Abstract
Official abstract text for this publication.
A work vehicle includes a vehicle body, a pair of left and right driving wheels that movably support the vehicle body, a pair of motors capable of rotatably driving the left and right driving wheels respectively, a pair of maneuvering levers pivotally supported to the vehicle body to be pivotable about a horizontal axis extending in a vehicle body transverse direction and capable of adjusting rotational speeds respectively of the left and right driving wheels and a pair of dynamic vibration absorbing portions supported to respective free end portions of the maneuvering levers and capable of suppressing vibrations of the maneuvering levers.
First claim
Opening claim text (preview).
The invention claimed is: 1. A work vehicle comprising: a vehicle body; a pair of left and right driving wheels that movably support the vehicle body; a pair of motors capable of rotatably driving the left and right driving wheels respectively; a pair of maneuvering levers pivotally supported to the vehicle body to be pivotable about a horizontal axis extending in a vehicle body transverse direction and capable of adjusting rotational speeds of the left and right driving wheels respectively; and a pair of solid dynamic vibration absorbing portions supported to respective free end portions of the maneuvering levers and capable of suppressing vibrations of the maneuvering levers, wherein each solid dynamic vibration absorbing portion of the pair of solid dynamic vibration absorbing portions includes a weight that is within an elastic body, wherein at the free end portion of the maneuvering lever, there is provided a grip for a person riding the work vehicle to effect an operation of adjusting a rotational speed of the respective motor; and the dynamic vibration absorbing portion is supported on a distal end side of the grip. 2. The work vehicle of claim 1 , wherein: the elastic body is supported to the free end portion of the maneuvering lever. 3. The work vehicle of claim 2 , wherein: the elastic body, at its center portion in the longitudinal direction, is formed in the shape of a hollow cylinder; and the weight is engaged within the hollow center portion of the elastic body. 4. The work vehicle of claim 1 , wherein: the elastic body has a spring constant and a damping coefficient, which are adjusted such that a natural frequency of the dynamic vibration absorbing portions correspond to a resonance frequency of the maneuvering levers.
Assignees
Inventors
Classifications
with two or more cutters · CPC title
- A01D34/905Primary
Vibration dampening means · CPC title
Control levers for portable mowing machines · CPC title
- A01D34/824Primary
Handle arrangements · CPC title
Vibration damping means · CPC title
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Frequently asked questions
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- What does patent US11246263B2 cover?
- A work vehicle includes a vehicle body, a pair of left and right driving wheels that movably support the vehicle body, a pair of motors capable of rotatably driving the left and right driving wheels respectively, a pair of maneuvering levers pivotally supported to the vehicle body to be pivotable about a horizontal axis extending in a vehicle body transverse direction and capable of adjusting r…
- Who is the assignee on this patent?
- Kubota Kk
- What technology area does this patent fall under?
- Primary CPC classification A01D34/905. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Feb 15 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).