Valve testing apparatus

Claim 1

A VALVE TESTING APPARATUS COMPRISING, IN COMBINATION, A HOUSING UNIT ADAPTED TO HOUSE A VALVE TO BE TESTED, SAID VALVE HAVING A PLURALITY OF PORTS IN ITS CASING, SAID PORTS INCLUDING FIRST AND SECOND INLET PORTS, FIRST AND SECOND OUTLET PORTS IN SERIES FLOW RELATIONSHIP WITH SAID FIRST AND SECOND INLET PORTS, RESPECTIVELY, AND AN EXHAUST PORT ADAPTED TO COMMUNICATE WITH SAID FIRST AND SECOND OUTLET PORTS, A PLURALITY OF CONDUITS ADAPTED TO BE CONNECTED TO SAID PORTS, POWER OPERATED MEANS INCLUDING A PLURALITY OF SINGLE ACTING PRESSURE DIFFERENTIAL OPERATED MOTORS FOR COUPLING THE CONDUITS TO THE VALVE PORTS, FIRST MANUALLY OPERATED MEANS FOR LOCKING A VALVE IN PLACE IN THE HOUSING, SECOND MANUALLY OPERATED MEANS FOR BODILY MOVING THE VALVE TO ANY ONE OF ITS OPERATIVE POSITIONS WHEN POSITIONED IN THE HOUSING UNIT, SAID SINGLE ACTING PRESSURE DIFFERENTIAL OPERATED MOTORS BEING SIMULTANEOUSLY OPERATED INDEPENDENTLY OF SAID SECOND MANUALLY OPERATED MEANS, A FLUID PRESSURE INDICATOR UNIT CONNECTED WITH THE CONDUITS AND OPERATIVE, DURING A TEST OF THE VALVE, TO INDICATE THE PRESSURE EXERTED BY A POWER FLUID FLOWING WITHIN ONE OR MORE OF THE CONDUITS; TOGETHER WITH A SOURCE OF FLUID PRESSURE OPERABLY CONNECTED WITH ONE OF SAID CONDUITS, SAID CONDUIT BEING CONNECTED TO THE SAID FIRST AND SECOND INTAKE PORTS OF THE VALVE BEING TESTED.