Sealing device for power tool

Claim 1

A SEALING DEVICE FOR AN IMPULSE TOOL FOR APPLYING A PREDETERMINED TORQUE TO AN OBJECT AND HAVING A HOUSING MEANS ADAPTED TO CONTAIN A FLUID, SPINDLE MEANS IN SAID HOUSING MEANS AND IN SAID FLUID AND DRIVE MEANS OPERATIVELY ASSOCIATED WITH ONE OF SAID HOUSING MEANS AND SAID SPINDLE MEANS FOR CAUSING RELATIVE 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, SAID SEALING DEVICE COMPRISING: (A) LAND MEANS DISPOSED ON SAID HOUSING MEANS AND (B) A THROUGH TYPE SPINDLE BLADE IN SAID SPINDLE MEANS AND ENGAGEABLE WITH SAID LAND MEANS ONCE DURING EACH REVOLUTION OF SAID RELATIVE ROTARY MOVEMENT TO DYNAMICALLY SEAL OFF A PORTION OF SAID FLUID SO THAT THE PRESSURE IN SAID PORTION INCREASES THEREBY CAUSING THE OTHER OF SAID HOUSING MEANS AND SAID SPINDLE MEANS TO ROTATE WITH RESPECT TO SAID ONE AND TO APPLY A TORQUE TO SAID OBJECT, (C) ONE OF THE LAND MEANS AND THE SPINDLE BLADE BEING DISPOSED IN SPACED RELATIONSHIP FROM AN AXIS OF SYMMETRY OF SAID HOUSING MEANS AND A LONGITUDINAL AXIS OF SAID SPINDLE MEANS, RESPECTIVELY.