Delayed return pressure actuated device

Claim 1

A DEVICE ADAPTED TO BE ACTUATED UPON AN INCREASE IN FLUID PRESSURE AND TO REMAIN ACTUATED FOR A PREDETERMINED TIME AFTER THE ACTUATING PRESSURE SUBSIDES, SAID DEVICE COMPRISING AN INTERMEDIATE BODY HAVING OPPOSITELY DISPOSED CAVITIES FORMED THEREIN SO AS TO PROVIDE AN INTERMEDIATE RIGID WALL, A FIRST MOVABLE DIAPHRAGM SECURED TO ONE END OF SAID BODY BY MEANS OF A FIRST END COVER HAVING A RECESS FORMED THEREIN SO AS TO PROVIDE A FIRST CHAMBER BETWEEN SAID RIGID WALL AND SAID FIRST DIAPHRAGM AND A SECOND CHAMBER BETWEEN SAID FIRST DIAPHRAGM AND SAID FIRST END COVER, A SECOND MOVABLE DIAPHRAGM SECURED TO THE OTHER END OF SAID BODY BY MEANS OF A SECOND END COVER MEMBER HAVING A RECESS FORMED THEREIN SO AS TO PROVIDE A THIRD CHAMBER BETWEEN SAID RIGID WALL AND SAID SECOND DIAPHRAGM AND A FOURTH CHAMBER BETWEEN SAID SECOND DISPHRAGM AND SAID SECOND END COVER, A SOURCE OF VARYING FLUID PRESSURE OUTSIDE SAID FIRST END COVER, A PASSAGE THROUGH SAID FIRST END COVER MEMBER COMMUNICATING SAID VARYING PRESSURE TO SAID SECOND CHAMBER, A TWODIAMETER PASSAGEWAY FORMED IN SAID RIGID WALL FOR PROVIDING COMMUNICATION BETWEEN SAID FIRST AND THIRD SAID THIRD CHAMBER, THE SMALLER DIAMETER OF SAID PASSAGE SERVING AS A VALVE SEAT, A SPRING-LOADED VALVE IN THE LARGER DIAMETER PORTION OF SAID TWO-DIAMETER PASSAGE NORMALLY PREVENTING COMMUNICATION BETWEEN SAID FIRST AND THIRD CHAMBERS, A CONTINUOUSLY OPEN CALIBRATED RESTRICTION FORMED IN SAID RIGID WALL PROVIDING CONTINUOUS COMMUNICATION BETWEEN SAID FIRST AND SAID THIRD CHAMBER, SAID FIRST AND THIRD CHAMBERS CONTAINING TRAPPED FLUID SUCH THAT WHEN SAID FIRST DIAPHRAGM IS ACTUATED BY AN INCREASE IN SAID VARYING PRESSURE AND A PREDETERMINED PRESSURE IN SAID FIRST CHAMBER IS ATTAINED SAID TRAPPPED FLUID IS TRANSFERRED PAST SAID VALVE AND TO SAID THIRD CHAMBER SO AS TO ACTUATE SAID SECOND DIAPHRAGM AND EXTENDING INTO SAID SAID FIRST DIAPHRAGM WAS ACTUATED, A STEM MEMBER ATTACHED TO SAID SECOND DIAPHRAGM AND EXTENDING INTO SAID FOURTH CHAMBER, SWITCH MEANS CONNECTED TO SAID STEM MEMBER AND MEANS OPERATIVELY CONNECTED TO SAID STEM MEMBER FOR RETURNING SAID SECOND DIAPHRAGM TO ITS ORIGINAL POSITION WHEN SAID VARYING PRESSURE SUBSIDES, THE RETURN OF SAID FLUID FROM SAID THIRD CHAMBER TO SAID FIRST CHAMBER BEING RETARDED BY THE CLOSING OF SAID VALVE SO AS TO CAUSE SAID FLUID TO RETURN THROUGH SAID RESTRICTION.

Claim 2

A DEVICE ADAPTED TO BE ACTUATED UPON AN INCREASE IN FLUID PRESSURE AND TO REMAIN ACTUATED FOR A PREDETERMINED TIME AFTER THE ACTUATING PRESSURE SUBSIDES, SAID DEVICE COMPRISING AN INTERMEDIATE BODY HAVING OPPOSITELY DISPOSED CAVITIES FORMED THEREIN SO AS TO PROVIDE AN INTERMEDIATE RIGID WALL, A FIRST MOVABLE DIAPHRAGM SECURED TO ONE END OF SAID BODY BY MEANS OF A FIRST END COVER HAVING A RECESS FORMED THEREIN SO AS TO PROVIDE A FIRST CHAMBER BETWEEN SAID RIGID WALL AND SAID FIRST DIAPHRAGM AND A SECOND CHAMBER BETWEEN SAID FIRST DIAPHRAGM AND SAID FIRST END COVER, A SECOND MOVABLE DIAPHRAGM SECURED TO THE OTHER END OF SAID BODY BY MEANS OF A SECOND END COVER MEMBER HAVING A RECESS FORMED THEREIN SO AS TO PROVIDE A THIRD CHAMBER BETWEEN SAID RIGID WALL AND SAID SECOND DIAPHRAGM AND A FOURTH CHAMBER BETWEEN SAID SECOND DISPHRAGM AND SAID SECOND END COVER, A SOURCE OF VARYING FLUID PRESSURE OUTSIDE SAID FIRST END COVER, A PASSAGE THROUGH SAID FIRST END COVER MEMBER COMMUNICATING SAID VARYING PRESSURE TO SAID SECOND CHAMBER, A TWODIAMETER PASSAGEWAY FORMED IN SAID RIGID WALL FOR PROVIDING COMMUNICATION BETWEEN SAID FIRST AND THIRD SAID THIRD CHAMBER, THE SMALLER DIAMETER OF SAID PASSAGE SERVING AS A VALVE SEAT, A SPRING-LOADED VALVE IN THE LARGER DIAMETER PORTION OF SAID TWO-DIAMETER PASSAGE NORMALLY PREVENTING COMMUNICATION BETWEEN SAID FIRST AND THIRD CHAMBERS, A CONTINUOUSLY OPEN CALIBRATED RESTRICTION FORMED IN SAID RIGID WALL PROVIDING CONTINUOUS COMMUNICATION BETWEEN SAID FIRST AND SAID THIRD CHAMBER, SAID FIRST AND THIRD CHAMBERS CONTAINING TRAPPED FLUID SUCH THAT WHEN SAID FIRST DIAPHRAGM IS ACTUATED BY AN INCREASE IN SAID VARYING PRESSURE AND A PREDETERMINED PRESSURE IN SAID FIRST CHAMBER IS ATTAINED SAID TRAPPPED FLUID IS TRANSFERRED PAST SAID VALVE AND TO SAID THIRD CHAMBER SO AS TO ACTUATE SAID SECOND DIAPHRAGM AND EXTENDING INTO SAID SAID FIRST DIAPHRAGM WAS ACTUATED, A STEM MEMBER ATTACHED TO SAID SECOND DIAPHRAGM AND EXTENDING INTO SAID FOURTH CHAMBER, SWITCH MEANS CONNECTED TO SAID STEM MEMBER AND MEANS OPERATIVELY CONNECTED TO SAID STEM MEMBER FOR RETURNING SAID SECOND DIAPHRAGM TO ITS ORIGINAL POSITION WHEN SAID VARYING PRESSURE SUBSIDES, THE RETURN OF SAID FLUID FROM SAID THIRD CHAMBER TO SAID FIRST CHAMBER BEING RETARDED BY THE CLOSING OF SAID VALVE SO AS TO CAUSE SAID FLUID TO RETURN THROUGH SAID RESTRICTION.