Invention Grant
- Patent Title: Materials handling vehicle estimating a speed of a movable assembly from a lift motor speed
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Application No.: US14807051Application Date: 2015-07-23
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Publication No.: US09751740B2Publication Date: 2017-09-05
- Inventor: Karl L. Dammeyer , Eric D. Holbrook , Darrin R. Ihle , Marc A. McClain , Lucas B. Waltz
- Applicant: Crown Equipment Corporation
- Applicant Address: US OH New Bremen
- Assignee: Crown Equipment Corporation
- Current Assignee: Crown Equipment Corporation
- Current Assignee Address: US OH New Bremen
- Agency: Stevens & Showalter, LLP
- Main IPC: B66F9/22
- IPC: B66F9/22 ; B66F9/20 ; B66F17/00 ; B66F9/07 ; B66F9/08 ; B66F9/24

Abstract:
A materials handling vehicle is provided comprising: a support structure including a first 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 first 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 ram/cylinder assembly. The control structure may estimate a speed of the movable assembly from a speed of the motor and may control the operation of the at least one valve using a comparison involving the estimated movable assembly speed and a determined speed, and the comparison may not involve use of an operator commanded speed.
Public/Granted literature
- US20150344278A1 MATERIALS HANDLING VEHICLE ESTIMATING A SPEED OF A MOVABLE ASSEMBLY FROM A LIFT MOTOR SPEED Public/Granted day:2015-12-03
Information query
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