Lip seals

Claim 1

AN ADJUSTABLE SEAL CONSTRUCTION FOR THE JUNCTION BETWEEN A DRIVEN SHAFT AND ONE END OF A HOUSING, COMPRISING A CASING HAVING AN APERTURE THERETHROUGH PROVIDED WITH AN ANNULAR SEAT IN ONE PORTION THEREOF, A SHAFT EXTENDING THROUGH SAID APERTURE AND ADAPTED TO MOVE RELATIVE TO SAID CASING, A SEALING ELEMENT INCLUDING A FLEXIBLE ANNULAR BODY PORTION POSITIONED AROUND SAID SHAFT, AN ANNULAR FLANGE EXTENDING RADIALLY OUTWARD FROM SAID BODY PORTION AND POSITIONED IN SAID SEAT, A MOUNTING PLATE FIXED TO SAID CASING AND SURROUNDING SAID SHAFT AND BODY PORTION, MEANS SECURING SAID MOUNTING PLATE TO SAID CASING IN CLAMPING RELATION WITH SAID FLANGE, AT LEAST ONE FLEXIBLE ANNULAR LIP EXTENDING RADIALLY INWARDLY OF SAID BODY PORTION FOR ENGAGEMENT WITH SAID SHAFT ALONG THE OUTER PERIPHERY THEREOF, SAID LIP BEING INTERGAL WITH SAID BODY PORTION AND EXTENDING THEREFROM WITH THE AXIS OF SAID ANNULAR LIP BEING GENERALLY AT A RIGHT ANGLE WITH RESPECT TO THE AXIS OF SAID SHAFT, AN ADJUSTMENT ELEMENT POSITIONED BETWEEN SAID BODY PORTION AND SAID MOUNTING PLATE IN TELESCOPING RELATION THEREWITH FOR ADVANCEMENT TOWARD SAID CASING, THE INTERIOR SURFACE OF SAID ELEMENT ENGAGING THE EXTERIOR SURFACE OF SAID BODY PORTION, AND AT LEAST ONE OF SAID SURFACES BEING OF TAPERED CONFIGURATION TO EFFECT COMPRESSION OF SAID BODY PORTION AND MOVEMENT OF SAID LIP RADIALLY INWARDLY FOR INCREASED SEALING ENGAGEMENT OF EACH SAID LIP WITH SAID SHAFT IN RESPONSE TO THE MOVEMENT OF SAID ELEMENT TOWARD SAID HOUSING.