Hydraulic power tool
AssigneeMilwaukee Electric Tool Corporation
InventorsSean T. Kehoe, James G. Ballard, Marc S. D'Antuono
Life of this patent
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Abstract
A hydraulic power tool includes a housing defining a cylinder, a piston at least partially positioned within the cylinder and movable between a retracted position and an extended position, a clevis supporting a head of the power tool, a nut coupled to an outer peripheral surface of the clevis, and a collar coupled to the housing and surrounding the nut to axially constrain the nut between the collar and the housing while permitting relative rotation between the collar and the nut.
Claims20
A release mechanism for removably coupling a tool to a clevis having first and second clevis legs, the release mechanism comprising:
- a pin movable between an inserted position where the pin extends between the first and second clevis legs and a withdrawn position where the pin does not extend between the first and second clevis legs, the pin including a first end, a second end, a groove proximate the first end, a notch extending axially from the groove, and a keyway extending from the groove toward the second end of the pin and in parallel with the notch;
- a detent configured to be seated in the notch when the pin is in the inserted position,
- wherein the pin is rotatable between a first rotational position in which the detent is seated in the notch and contact between a wall of the notch and the detent prevents the pin from being withdrawn from between the first and second clevis legs, and a second rotational position in which the pin is movable to the withdrawn position to permit removal of the tool from the clevis, the second rotational position being different from the first rotational position.
A clevis assembly, comprising:
- a clevis having a first clevis leg and a second clevis leg, the first clevis leg including a first recess formed in a surface that faces the second clevis leg and the second clevis leg including a second recess formed in a surface that faces the first clevis leg;
- a tool head configured to be removably coupled to the clevis between the first and second clevis legs;
- a cylindrical sleeve configured to be seated in the first and second recesses of the clevis;
- a sliding pin rotatable between a first rotational position and a second rotational position that is different from the first rotational position, and movable in an axial direction between an inserted position and a withdrawn position when the sliding pin is in the second rotational position, the sliding pin including a notch, a keyway, and a groove extending between the notch and the keyway so that the keyway is spaced from the notch;
- a handle coupled to a first end of the sliding pin;
- a biasing member positioned between the handle and the first clevis leg, the biasing member arranged to bias the sliding pin toward a first axial direction and the second rotational position;
- and
- a detent pin extending from a bore formed in the first clevis leg, the detent pin engaging a wall of the notch of the sliding pin to prevent the sliding pin from being removed from the first rotational position so that the sliding pin is retained in the inserted position.
A method for connecting a tool head to a clevis, the method comprising:
- inserting a sleeve through bearing eyes of tool head;
- positioning the sleeve and the tool head between first and second legs of the clevis so that the sleeve is seated in first and second recesses formed respectively in the first and second legs of the clevis;
- moving a sliding pin in a first axial direction to extend through the sleeve so that a detent pin moves along a longitudinal groove of the sliding pin toward a radial groove of the sliding pin;
- rotating the sliding pin so that the detent pin moves along the radial groove of the sliding pin toward a notch in the sliding pin;
- and
- moving the sliding pin in a second axial direction opposite the first axial direction so that the detent pin is seated in the notch of the sliding pin, and contact between a wall of the notch and the detent pin prevents the sliding pin from rotating.
Dependencies are inferred from the claim text.