Lubrication of the relatively extensible parts of a telescopic shaft

Claim 1

THE COMBINATION OF AN OUTER ELONGATED TUBULAR SHAFT MEMBER HAVING A RECESSED PORTION INTERMEDIATE ITS ENDS, AN INNER SHAFT MEMBER HAVING A BEARING SURFACE OF NONCIRCULAR CROSS-SECTION, A FIRST BEARING ELEMENT HAVING A BEARING SURFACE COMPLEMENTARY TO THE BEARING SURFACE OF SAID INNER SHAFT MEMBER, SAID FIRST BEARING SURFACE BEING FIXED TO AND WITHIN SAID OUTER TUBULAR SHAFT MEMBER IN SPACED RELATION TO, AND ON ONE SIDE OF, SAID RECESSED PORTION AND BEING RECIPROCABLY ENGAGED WITH SAID INNER SHAFT MEMBER, A SECOND ELEMENT FIXED TO AND WITHIN SAID OUTER TUBULAR SHAFT IN TRANSVERSE RELATION THERETO AND IN SPACED RELATION TO AND ON THE OTHER SIDE OF SAID RECESSED PORTION, THEREBY DEFINING WITH SAID FIRST BEARING ELEMENT AND SAID OUTER SHAFT MEMBER A CHAMBER IN WHICH SAID INNER SHAFT MEMBER IS MOVABLE, AND A GREASE FITTING MOUNTED ON SAID RECESSED PORTION AND ADAPTED TO SUPPLY SAID CHAMBER WITH LUBRICANT, SAID GREASE FITTING AND SAID RECESSED PORTION BEING PROPORTIONED SO THAT THE OUTERMOST END OF SAID GREASE FITTING TERMINATES SUBSTANTIALLY WITHIN THE TRANSVERSE OUTLINE OF THE PORTIONS OF SAID OUTER TUBULAR SHAFT MEMBER DISPOSED AXIALLY ADJACENT TO SAID RECESSED PORTION.