SPREAD-STYLE COUPLER WITH SUPPLEMENTAL SAFETY LOCK
First Claim
1. A coupler for a backhoe or other excavator, said coupler comprising:
- a frame including an upper portion and a lower portion, said upper portion adapted to be secured to an associated backhoe or excavator arm and said lower portion comprising a first hook adapted to mate releasably with a first associated attachment pin and comprising a second hook adapted to mate releasably with a second associated attachment pin;
a lock system comprising at least a first safety lock movably connected to the frame and movable relative to the first hook between an engaged position for capturing the first associated attachment pin in the first hook and a disengaged position for releasing the first associated attachment pin from the first hook;
an actuator adapted to move the first safety lock selectively between its engaged and disengaged positions;
at least a first lock arm movably connected to the frame, said first lock arm movable between a locked position and an unlocked position, wherein said first lock arm engages and retains said first safety lock in its engaged position when said first lock arm is in its locked position, said first lock arm selectively movable from its locked position to its unlocked position by contact between a portion of said first lock arm and the associated backhoe or excavator arm when the frame is moved to a curled position relative to the associated backhoe or excavator arm.
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0 Petitions
Accused Products
Abstract
A coupler for a backhoe or other excavator includes a frame including an upper portion and a lower portion. The upper portion is adapted to be secured to an associated backhoe or excavator arm. The lower portion includes a first hook adapted to mate releasably with a first associated attachment pin and includes a second hook adapted to mate releasably with a second associated attachment pin. A lock system includes at least a first safety lock that is movably connected to the frame and that moves relative to the first hook between an engaged position for capturing the first associated attachment pin in the first hook and a disengaged position for releasing the first associated attachment pin from the first hook. An actuator is adapted to move the first safety lock selectively between its engaged and disengaged positions. At least a first lock arm is movably connected to the frame. The first lock arm is movable between a locked position and an unlocked position. The first lock arm engages and retains the first safety lock in its engaged position when the first lock arm is in its locked position. The first lock arm is selectively movable from its locked position to its unlocked position by contact between a portion of the first lock arm and the associated backhoe or excavator arm when the frame is moved to a curled position relative to the associated backhoe or excavator arm.
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Citations
19 Claims
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1. A coupler for a backhoe or other excavator, said coupler comprising:
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a frame including an upper portion and a lower portion, said upper portion adapted to be secured to an associated backhoe or excavator arm and said lower portion comprising a first hook adapted to mate releasably with a first associated attachment pin and comprising a second hook adapted to mate releasably with a second associated attachment pin; a lock system comprising at least a first safety lock movably connected to the frame and movable relative to the first hook between an engaged position for capturing the first associated attachment pin in the first hook and a disengaged position for releasing the first associated attachment pin from the first hook; an actuator adapted to move the first safety lock selectively between its engaged and disengaged positions; at least a first lock arm movably connected to the frame, said first lock arm movable between a locked position and an unlocked position, wherein said first lock arm engages and retains said first safety lock in its engaged position when said first lock arm is in its locked position, said first lock arm selectively movable from its locked position to its unlocked position by contact between a portion of said first lock arm and the associated backhoe or excavator arm when the frame is moved to a curled position relative to the associated backhoe or excavator arm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An attachment coupler comprising:
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a frame including a first hook adapted to mate with a first associated attachment pin and including a second hook adapted to mate with a second associated attachment pin, said second hook being movable toward and away from said first hook; a safety lock movably connected to the frame and movable relative to the first hook between an engaged position where it blocks said first hook and a disengaged position where it opens said first hook; an actuator operably connected between said second hook and said safety lock, said actuator adapted to move the second hook toward and away from the first hook and adapted to move the safety lock between its engaged and disengaged positions; a lock arm movably connected to the frame and movable between a locked position and an unlocked position, wherein said lock arm engages and retains the safety lock in its engaged position when said lock arm is in its locked position, said lock arm selectively movable from its locked position to its unlocked position by contact between said lock arm and an associated backhoe or excavator arm when the frame is moved to a curled position. - View Dependent Claims (16, 17, 18, 19)
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Specification