Coupler for coupling an accessory to a dipper arm and a control system for such a coupler
First Claim
1. A control system for controlling the release of an accessory from a quick hitch coupler coupling the accessory to a hydraulically operable arm of a machine, the hydraulically operable arm being operable by a pressurized hydraulic system of the machine the coupler having:
- a body member adapted for coupling to the arm;
an engagement mechanism, arranged on the body member, for releasably engaging the accessory, the engagement mechanism being actuatable to move the engagement mechanism between a first accessory engaged state in which the engagement mechanism engages the accessory securely for working of the accessory by the arm and a second accessory disengaged state in which the accessory is removable from the coupler;
wherein the control system incorporates a safety control for preventing actuation of the engagement mechanism from the accessory engaged state to the accessory disengaged state if the hydraulic pressure in at least one selected part of the hydraulic system operating to move the coupler relative to the arm does not exceed a threshold value.
4 Assignments
0 Petitions
Accused Products
Abstract
A control system for controlling the release of an accessory from any quick hitch coupler coupling the accessory to a hydraulically operable arm of a machine, operated by a pressurized hydraulic system. The control system can be used with a coupler for coupling an accessory to a dipper arm and a control system for such a coupler, such as a quick hitch coupler for coupling an accessory to a dipper arm of a back actor such as may be used by an earth working apparatus. The quick hitch coupler comprises a body member adapted for coupling to the dipper arm, a fixed engaging means mounted on the body member for engaging a first one of a pair of coupling pins mounted on the accessory, and a moveable engaging means mounted on the body member for engaging a second one of the pair of coupling pins of the accessory.
72 Citations
30 Claims
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1. A control system for controlling the release of an accessory from a quick hitch coupler coupling the accessory to a hydraulically operable arm of a machine, the hydraulically operable arm being operable by a pressurized hydraulic system of the machine the coupler having:
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a body member adapted for coupling to the arm; an engagement mechanism, arranged on the body member, for releasably engaging the accessory, the engagement mechanism being actuatable to move the engagement mechanism between a first accessory engaged state in which the engagement mechanism engages the accessory securely for working of the accessory by the arm and a second accessory disengaged state in which the accessory is removable from the coupler; wherein the control system incorporates a safety control for preventing actuation of the engagement mechanism from the accessory engaged state to the accessory disengaged state if the hydraulic pressure in at least one selected part of the hydraulic system operating to move the coupler relative to the arm does not exceed a threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. The control system for controlling the release of an accessory from a coupler coupling the accessory to a hydraulically operable arm of a machine, the coupler having:
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a body member adapted for coupling to the arm; an engagement mechanism, arranged on the body member, for releasably engaging the accessory, the engaging means being actuatable to move an engagement mechanism between a first accessory engaged state in which the engagement mechanism engages the accessory securely for working of the accessory by the arm and a second accessory disengaged state in which the accessory is removable from the coupler; wherein the control system incorporates a safety control for preventing actuation of the engagement mechanism from the accessory engaged state to the accessory disengaged state if the coupler is not in one or more predetermined positions relative to the arm. - View Dependent Claims (27, 28, 29, 30)
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Specification