Patent ID: 8931246
Filing Date: 2015-01-13
Classification: A01D,F15B

Abstract:
1. A header lift assembly for an agricultural harvester, comprising: a lift cylinder comprising a sleeve and a piston, wherein the piston is configured to move in an axial direction relative to the sleeve; and a lock assembly coupled to the lift cylinder, wherein the lock assembly comprises a pin and a moveable member comprising a pathway, the pathway is configured to accommodate the pin and change position from movement of the pin, wherein one of the pin and the member is coupled to the sleeve, and the other of the pin and the member is coupled to the piston for movement therewith and the pathway is configured to automatically transition to a first locking position with the pin upon extension of the piston in the axial direction to a locking distance from the sleeve, wherein the first locking position is configured to block retraction of the piston in the axial direction beyond a first distance from the sleeve, and the pathway is shaped and configured to automatically disengage with the pin and transition from the first locking position to an unlocked position that facilitates retraction of the piston beyond the first distance upon extension of the piston to an unlocking distance.