System for monitoring load and angle for mobile lift device
First Claim
1. A mobile lift device, the device comprising:
- a chassis for movement over a surface;
a rotator supported by the chassis;
a boom coupled to the rotator to permit the boom to pivot about at least two axes relative to the chassis;
a first hydraulic operator coupled to the boom to pivot the boom relative to the rotator;
a second hydraulic operator coupled to the rotator to rotate the rotator relative to the chassis;
a plurality of outriggers coupled to the chassis to provide stabilization of the chassis during load handling;
a sheave supported at a distal end of the boom, the sheave rotatably supported to rotate about at least two axes relative to the boom;
a first hoist supported at the rotator;
a cable supported by the first hoist and the sheave;
a first angle sensor configured to generate a first angle signal representative of a first angle of the cable relative to the boom;
a second angle sensor configured to generate a second angle signal representative of a second angle of the cable relative to the boom; and
a monitoring circuit coupled to the first and second angle sensors to determine at least one force applied to the device based at least upon the angle signals and determining whether the force is sufficient to tip the mobile lift device.
2 Assignments
0 Petitions
Accused Products
Abstract
A mobile lift device having a load moving device capable of engaging a load is provided. The mobile lift device includes one or more systems for stabilizing the mobile lift device during operation of the load moving device. According to one exemplary embodiment, the mobile lift device is a heavy duty wrecker having a rotatable boom assembly. The heavy duty wrecker comprises a monitoring system for stabilizing the wrecker during operation of the boom assembly. The monitoring system comprises a plurality of sensors and a monitoring circuit coupled to the sensors to generate a force signal representative of at least one force being applied to the wrecker based upon the transmitted signals.
93 Citations
28 Claims
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1. A mobile lift device, the device comprising:
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a chassis for movement over a surface; a rotator supported by the chassis; a boom coupled to the rotator to permit the boom to pivot about at least two axes relative to the chassis; a first hydraulic operator coupled to the boom to pivot the boom relative to the rotator; a second hydraulic operator coupled to the rotator to rotate the rotator relative to the chassis; a plurality of outriggers coupled to the chassis to provide stabilization of the chassis during load handling; a sheave supported at a distal end of the boom, the sheave rotatably supported to rotate about at least two axes relative to the boom; a first hoist supported at the rotator; a cable supported by the first hoist and the sheave; a first angle sensor configured to generate a first angle signal representative of a first angle of the cable relative to the boom; a second angle sensor configured to generate a second angle signal representative of a second angle of the cable relative to the boom; and a monitoring circuit coupled to the first and second angle sensors to determine at least one force applied to the device based at least upon the angle signals and determining whether the force is sufficient to tip the mobile lift device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A tow vehicle for handling loads, the vehicle comprising:
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a chassis; a rotator supported by the chassis; an extendable boom coupled to the rotator to permit the boom to pivot about at least two axes relative to the chassis, wherein the boom is extendable between a first length and a second length; a first hydraulic operator coupled to the boom to pivot the boom relative to the rotator; a second hydraulic operator coupled to the rotator to rotate the rotator relative to the chassis; a plurality of outriggers coupled to the chassis to provide stabilization of the chassis during load handling; a first sheave supported at a distal end of the boom, the first sheave rotatably supported to rotate about at least two axes relative to the boom; a second sheave supported at the distal end of the boom proximate the first sheave, the second sheave rotatably supported to rotate about at least two axes relative to the boom; a first hoist supported at the rotator; a second hoist supported at the rotator; a first cable supported by the first hoist and the first sheave; a second cable supported by the second hoist and the second sheave; a first angle sensor configured to generate a first angle signal representative of a first angle of the first cable relative to the boom; a second angle sensor configured to generate a second angle signal representative of a second angle of the second cable relative to the boom; and a monitoring circuit coupled to the first and second angle sensors to determine at least one force applied to the vehicle based at least upon the angle signals and determining whether the force is sufficient to tip or overload the tow vehicle. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A mobile lift device, the mobile lift device comprising:
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a chassis configured to move over a surface; a rotator configured to be supported by the chassis; a boom coupled to the rotator, the rotator configured to permit the boom to pivot about at least two axes relative to the chassis; a first hydraulic operator coupled to the boom, the first hydraulic operator configured to pivot the boom relative to the rotator; a second hydraulic operator coupled to the rotator, the second hydraulic operator configured to rotate the rotator relative to the chassis; a plurality of outriggers coupled to the chassis, the plurality of outriggers configured to provide stabilization of the chassis during load handling; a sheave supported at a distal end of the boom, the sheave rotatably supported to rotate about at least two axes relative to the boom; a hoist supported at the rotator; a cable supported by the hoist and the sheave; a first angle sensor configured to generate a first angle signal, the first angle signal being configured to represent a first angle of the cable relative to the boom; a second angle sensor configured to generate a second angle signal, the second angle signal being configured to represent a second angle of the cable relative to the boom; and a monitoring circuit coupled to the first angle sensor and the second angle sensor, the monitoring circuit configured to determine at least one force applied to the mobile lift device based at least upon the first angle signal and the second angle signal and the monitoring circuit configured to determine whether the force exceeds a predetermined value, the predetermined value representing a force required to tip the mobile lift device. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A tow vehicle, the tow vehicle comprising:
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a chassis; a rotator configured to be supported by the chassis; a boom coupled to the rotator, the rotator configured to permit the boom to pivot about at least two axes relative to the chassis, wherein the boom is extendable between a first length and a second length; a first hydraulic operator coupled to the boom, the first hydraulic configured to pivot the boom relative to the rotator; a second hydraulic operator coupled to the rotator, the second hydraulic configured to rotate the rotator relative to the chassis; a plurality of outriggers coupled to the chassis, the plurality of outriggers configured to provide stabilization of the chassis during load handling; a first sheave supported at a distal end of the boom, the first sheave rotatably supported to rotate about at least two axes relative to the boom; a second sheave supported at the distal end of the boom proximate the first sheave, the second sheave rotatably supported to rotate about at least two axes relative to the boom; a first hoist configured to be supported at the rotator; a second hoist configured to be supported at the rotator; a first cable configured to be supported by the first hoist and the first sheave; a second cable configured to be supported by the second hoist and the second sheave; a first angle sensor configured to generate a first angle signal, the first angle signal being configured to represent a first angle of the first cable relative to the boom; a second angle sensor configured to generate a second angle signal, the second angle signal being configured to represent a second angle of the second cable relative to the boom; and a monitoring circuit coupled to the first and second angle sensors, the monitoring circuit configured to determine at least one force applied to the tow vehicle based at least upon the first angle signal and the second angle and configured to determine whether the force exceeds a predetermined value, the predetermined value representing a force required to tip or overload the tow vehicle. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification