Patent ID: 9464510
Filing Date: 2016-10-11
CPC Classification: E21B

Claim Text:
1. A trigger mechanism for a ball activated device, the trigger mechanism comprising: an inner sleeve axially slidably disposed within an outer sleeve from an initial state wherein the ball activated device is inactive to a final state wherein the ball activated device is activated; a seat sleeve axially slidably disposed within the inner sleeve, the seat sleeve comprising radially moveable seat defining members configured to form a fluid tight seal with a ball in the initial state and allowing the ball to pass in the final state; wherein the trigger mechanism is characterized in that an alternating member is disposed radially moveably in a radial aperture through a wall of the inner sleeve; wherein the alternating member abuts an upstream side of a first axial stopper on an inner surface of the outer sleeve and a radially exterior surface on the seat sleeve in the initial state, is received in a recess on the seat sleeve in an intermediate state, and is received in a groove in the inner surface in the final state.