Patent ID: 6035969
Filing Date: 2000-03-14
Classification: F16N

Abstract:
A coupling device for connection to a zerk fitting to deliver grease, the zerk fitting having a ball shaped head and a neck, the coupling device comprising:an outer tube;an aperture in a forward end of the outer tube which has a first portion sized to receive the ball shaped head and an adjoining second portion sized to receive the neck but retain the ball shaped head;an inner tube located within the outer tube, the inner tube having a hole proximal a forward end of the inner tube, the inner tube being rotatable relative to the outer tube and simultaneously axially movable relative to a longitudinal axis of the outer tube from a released position wherein the forward end of the inner tube is spaced rearward of the aperture in the outer tube to permit entry of the ball shaped head through the first portion of the aperture, to a locked position wherein the forward end of the inner tube engages the ball shaped head with the hole of the inner tube aligned with the ball shaped head.