Lubricating means for guide means of sliding parts

Claim 1

APPARATUS FOR LUBRICATING RELATIVELY SLIDABLE PARTS, SAID APPARATUS COMPRISING A FIRST SLIDING PART; A SECOND SLIDING PART ADJACENT TO SAID FIRST PART; MEANS FOR DEFINING TWO INTERCONNECTED, ANNULAR LUBRICATION CHAMBERS BETWEEN SAID PARTS WHICH HAVE A TOTAL VOLUME THAT REMAINS CONSTANT DURING RELATIVE SLIDING BY SAID PARTS, SAID MEANS COMPRISING A RECESS IN SAID FIRST PART AND HAVING A FIRST GUIDE SURFACE, AND A STEP ON SAID SECOND PART EXTENDING INTO SAID RECESS AND HAVING A SECOND GUIDE SURFACE IN GUIDE MOVEMENT RELATION TO SAID FIRST GUIDE SURFACE, THE RECESS BEING LARGER THAN THE STEP AND SAID STEP BEING IMPERVIOUS TO FLOW OF LUBRICANT THERETHROUGH BETWEEN SAID CHAMBERS, WHEREBY LUBRICANT CAN PASS FROM ONE CHAMBER TO THE OTHER AND VICE VERSA ONLY BETWEEN SAID FIRST AND SECOND GUIDE SURFACES, AND SEALING MEANS DISPOSED BETWEEN SAID SLIDING PARTS FOR SEALING OFF THE OPPOSITE ENDS OF THE TWO LUBRICATION CHAMBERS.