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Materials handling vehicle estimating a speed of a movable assembly from a lift motor speed
US8935058B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8935058-B2 |
| Application number | US-201213371789-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 13, 2012 |
| Priority date | Feb 16, 2011 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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Abstract
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A materials handling vehicle is provided comprising: a support structure including a fixed member; a movable assembly coupled to the support structure; a hydraulic system; and a control system. The support structure further comprises lift apparatus to effect movement of the movable assembly relative to the support structure fixed member. The lift apparatus includes at least one ram/cylinder assembly. The hydraulic system includes a motor, a pump coupled to the motor to supply a pressurized fluid to the at least one ram/cylinder assembly, and at least one electronically controlled valve associated with the at least one ram/cylinder assembly. The control structure may estimate a speed of the movable assembly from a speed of the motor and control the operation of the at least one valve using the estimated movable assembly speed.
First claim
Opening claim text (preview).
What is claimed is: 1. A materials handling vehicle comprising: a support structure including a fixed member; a movable assembly coupled to said support structure; said support structure further comprising lift apparatus to effect movement of said movable assembly relative to said support structure fixed member, said lift apparatus including at least one ram/cylinder assembly; a hydraulic system including a motor, a pump coupled to said motor to supply a pressurized fluid to…
Assignees
Inventors
Classifications
- B66F9/22Primary
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
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Frequently asked questions
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- What does patent US8935058B2 cover?
- A materials handling vehicle is provided comprising: a support structure including a fixed member; a movable assembly coupled to the support structure; a hydraulic system; and a control system. The support structure further comprises lift apparatus to effect movement of the movable assembly relative to the support structure fixed member. The lift apparatus includes at least one ram/cylinder ass…
- Who is the assignee on this patent?
- Dammeyer Karl L, Holbrook Eric D, Ihle Darrin R, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification B66F9/22. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 13 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).