Shock damping as for vehicular suspension systems

Claim 1

MOTION DAMPING SYSTEM COMPRISING: A HOUSING BODY HAVING FORMED THEREIN MAIN AND CONTROL BORES EACH HAVING FIRST AND SECOND ENDS; A DRIVING PISTON AXIALLY SLIDINGLY DISPOSED IN SAID MAIN BORE; HYDRAULIC BYPASS BORE COUPLED BETWEEN SAID FIRST AND SECOND ENDS OF SAID MAIN BORE, SAID CONTROL BORE BEING HYDRAULICALLY INTERPOSED IN SAID BYPASS BORE; PISTON VALVE MEANS DISPOSED AXIALLY SLIDINGLY WITHIN SAID CONTROL BORE FOR SUBSTANTIALLY CLOSING SAID BYPASS BORE DURING PREDETERMINED QUIESCENT CONDITIONS; PRESSURE CHANGES SENSING LOOP COUPLED TO SAID FIRST AND SECOND ENDS OF SAID CONTROL BORE FOR GENERATING THEREACROSS A HYDRAULIC SIGNAL SUBSTANTIALLY PROPORTIONAL TO THE TIME DERIVATIVE OF THE PRESSURE DIFFERENCE BETWEEN OPPOSITE ENDS OF SAID MAIN BORE; SAID PISTON VALVE MEANS BEING ADAPTED TO MOVE AXIALLY IN RESPONSE TO SAID HYDRAULIC SIGNAL THEREBY OPENING SAID BYPASS LOOP WHEN THE TIME RATE OF CHANGE OF SAID PRESSURE DIFFERNECE IS RELATIVELY HIGH; SAID HOUSING BODY BEING FORMED FURTHER TO DEFINE A THIRD BORE HAVING FIRST AND SECOND ENDS; FIRST MEANS FOR PROVIDING HYDRAULIC COMMUNICATION BETWEEN SAID FIRST END OF SAID MAIN BORE AND SAID FIRST END OF SAID THIRD BORE; SECOND MEANS FOR PROVIDING HYDRAULIC COMMUNICATION BETWEEN SAID CONTROL BORE AND SAID SECONE END OF SAID THIRD BORE; AND SPRING-LOADED EQUALIZING SPOOL AWXIALLY SLIDINGLY DISPOSED WITHIN SAID THIRD BORE.