Bypass control device for an impulse tool

Claim 1

FOR AN IMPULSE TOOL FOR APPLYING A TORQUE TO AN OBJECT, SAID IMPULSE TOOL HAVING HOUSING MEANS PROVIDED WITH A CAVITY FOR SEALINGLY CONTAINING A FLUID, SPINDLE MEANS IN SAID HOUSING MEANS AND IN SAID FLUID, DRIVE MEANS OPERATIVELY ASSOCIATED WITH ONE OF SAID HOUSING MEANS AND SAID SPINDLE MEANS FOR CAUSING RELATIVELY ROTARY MOVEMENT BETWEEN SAID HOUSING MEANS AND SAID SPINDLE MEANS, THE OTHER OF SAID HOUSING MEANS AND SAID SPINDLE MEANS BEING ADAPTED TO ENGAGE SAID OBJECT, SEALING MEANS ON ONE OF SAID HOUSING MEANS AND SAID SPINDLE MEANS, A FIRST SEALING PORTION ON SAID HOUSING MEANS, A SECOND SEALING PORTION ON SAID SPINDLE MEANS, SAID FIRST SEALING PORTION AND SAID SECOND SEALING PORTION BEING IN SEALING RELATION DURING A RELATIVELY SMALL PORTION OF EACH REVOLUTION OF SAID RELATIVE ROTATIVE MOVEMENT, SAID FIRST SEALING PORTION AND SAID SECOND SEALING PORTION AND SAID SEALING MEANS BEING OPERABLE DURING SAID RELATIVE SMALL PORTION OF EACH REVOLUTION OF SAID RELATIVE ROTARY MOVEMENT TO DYNAMICALLY SEAL OFF SAID CAVITY INTO A HIGH PRESSURE PORTION AND A LOW PRESSURE PORTION TO PRODUCE A PRIMARY PRESSURE PULSE IN SAID HIGH PRESSURE PORTION AND ON SAID OTHER OF SAID HOUSING MEANS AND SAID SPINDLE MEANS THEREBY CAUSING SAID OTHER TO ROTATE WITH RESPECT TO SAID ONE OF SAID HOUSING MEANS AND SAID SPINDLE MEANS AND TO APPLY A TORQUE TO SAID OBJECT; A BYPASS CONTROL DEVICE IN ONE OF SAID HOUSING MEANS AND SAID SPINDLE MEANS, SAID BYPASS CONTROL DEVICE COMPRISING: (A) SAID ONE BEING PROVIDED WITH CAVITY MEANS AND SEAT MEANS LOCATED CIRCUMFERENTIALLY OF SAID CAVITY MEANS AND IN COMMUNICATION WITH SAID CAVITY MEANS, (B) SAID ONE ALSO BEING PROVIDED WITH PASSAGE MEANS FOR COMMUNICATING IN SAID SEAT MEANS AND SAID CAVITY MEANS WITH SAID HIGH PRESSURE PORTION AND SAID LOW PRESSURE PORTION, (C) A CENTRIFUGAL MEMBER IN SAID CAVITY MEANS AND MOVABLE BY CENTRIFUGAL FORCE DURING ROTATION OF SAID ONE TO A POSITION IT PREVENTS FLUID FLOW THROUGH SAID SEAT POSITION IT PREVENTS FLUID FLOW THROUGH SAID SEAT MEANS, SAID CAVITY MEANS, AND SAID PASSAGE MEANS, (D) SAID PASSAGE MEANS COMMUNICATING SAID CAVITY MEANS WITH SAID HIGH PRESSURE PORTION TO SUPPLY FLUID FROM SAID HIGH PRESSURE PORTION TO SAID CAVITY MEANS FOR RETAINING SAID CENTRIFUGAL MEMBER IN SAID POSITION ADJACENT SAID MEANS, AND (E) MEANS IN SAID SEAT MEANS FOR BIASING SAID CENTRIFUGAL MEMBER FROM SAID SEAT MEANS TO A POSITION PERMITTING FLUID FLOW THROUGH SAID SEAT MEANS, SAID CAVITY MEANS, AND SAID PASSAGE MEANS.