Adjustable limit stop for high pressure valve

Claim 1

AN APPARATUS FOR ADJUSTING THE EXTENT OF TRAVEL OF THE VALVE STEM OF A THROTTLING VALVE INCLUDING A SHAFT ADAPTED FOR CONNECTION TO SAID VALVE STEM, SAID APPARATUS COMPRISING A FIRST FLUID ACTUATOR MEANS HAVING A MOVABLE BARRIER MEANS WITHIN A FLUID TIGHT CASING, SAID BARRIER MEANS BEING MOVABLE UNDER THE INFLUENCE OF A FLUID PRESSURE DIFFERENTIAL TO IMPART RECIPROCATING MOTION TO SAID SHAFT, AN ELONGATED SLEEVE MEANS ADJUSTABLY THREADED INTO THE WALL OF SAID FLUID TIGHT CASING FOR RECEIVING SAID SHAFT, ONE END OF SAID ELONGATED SLEEVE MEANS BEING A STOP MEANS IN SPACED RELATION TO ONE END OF SAID FLUID TIGHT CASING TO LIMIT THE EXTENT OF MOVEMENT OF SAID SHAFT BY DIRECT CONTACT WITH SAID BARRIER MEANS AND THE OTHER END OF SAID ELONGATED SLEEVE MEANS BEING A DRIVING MEANS FOR THREADABLY ADJUSTING SAID ELONGATED SLEEVE MEANS ALONG THE LENGTH OF SAID SHAFT AND THEREBY CHANGE THE SPACED RELATION OF SAID STOP MEANS WITHIN SAID FLUID TIGHT CASING, SAID DRIVING MEANS BEING A RATCHET GEAR MEANS ENCLOSED BY A ROTATABLE HOUSING HAVING FIXED THEREIN A RATCHET PAWL IN MOVABLE CONTACT WITH SAID RATCHET GEAR FOR ROTATION OF SAID ELONGATED SLEEVE MEANS, AND A SECOND FLUID ACTUATOR MEANS MECHANICALLY COUPLED TO SAID DRIVING MEANS TO THREADABLY ADJUST SAID ELONGATED SLEEVE MEANS AS DESIRED.

Claim 2

AN APPARATUS FOR ADJUSTING THE EXTENT OF TRAVEL OF THE VALVE STEM OF A THROTTLING VALVE INCLUDING A SHAFT ADAPTED FOR CONNECTION TO SAID VALVE STEM, SAID APPARATUS COMPRISING A FIRST FLUID ACTUATOR MEANS HAVING A MOVABLE BARRIER MEANS WITHIN A FLUID TIGHT CASING, SAID BARRIER MEANS BEING MOVABLE UNDER THE INFLUENCE OF A FLUID PRESSURE DIFFERENTIAL TO IMPART RECIPROCATING MOTION TO SAID SHAFT, AN ELONGATED SLEEVE MEANS ADJUSTABLY THREADED INTO THE WALL OF SAID FLUID TIGHT CASING FOR RECEIVING SAID SHAFT, ONE END OF SAID ELONGATED SLEEVE MEANS BEING A STOP MEANS IN SPACED RELATION TO ONE END OF SAID FLUID TIGHT CASING TO LIMIT THE EXTENT OF MOVEMENT OF SAID SHAFT BY DIRECT CONTACT WITH SAID BARRIER MEANS AND THE OTHER END OF SAID ELONGATED SLEEVE MEANS BEING A DRIVING MEANS FOR THREADABLY ADJUSTING SAID ELONGATED SLEEVE MEANS ALONG THE LENGTH OF SAID SHAFT AND THEREBY CHANGE THE SPACED RELATION OF SAID STOP MEANS WITHIN SAID FLUID TIGHT CASING, SAID DRIVING MEANS BEING A RATCHET GEAR MEANS ENCLOSED BY A ROTATABLE HOUSING HAVING FIXED THEREIN A RATCHET PAWL IN MOVABLE CONTACT WITH SAID RATCHET GEAR FOR ROTATION OF SAID ELONGATED SLEEVE MEANS, AND A SECOND FLUID ACTUATOR MEANS MECHANICALLY COUPLED TO SAID DRIVING MEANS TO THREADABLY ADJUST SAID ELONGATED SLEEVE MEANS AS DESIRED.