Step stick walking aid

Claim 1

IN AN AID FOR DISABLED PERSONS IN WALKING, A LOWER TUBULAR SECTION INCLUDING AN EXTENSION ELEMENT HAVING ITS LOWER END FITTING AND FIXED WITHIN SAID LOWER SECTION, THERE BEING A PLURALITY OF VERTICALLY-SPACED APERTURES IN SAID EXTENSION ELEMENT, AN UPPER TUBULAR SECTION SLIDABLY FITTING OVER AND ABOUT SAID EXTENSION ELEMENT, FIRST AND SECOND HAND GRIPS FIXED WITH SAID UPPER SECTION IN VERTICALLYSPACED RELATION THEREALONG, LOCK BOLT MEANS SLIDABLY FITTING WITHIN THE LOWER ONE OF SAID GRIPS AND HAVING AN END ADAPTED TO ENTER ANY SELECTED ONE OF SAID APERTURES IN SAID EXTENSION ELEMENT, OPERATING MEANS CONNECTED WITH SAID BOLT AND ENGAGEABLE EXTERIORLY OF SAID LOWER GRIP CLOSELY ADJACENT SAID UPPER TUBULAR SECTION, TO SLIDE SAID LOCK BOLT MEANS FROM A FIRST POSITION WHEREIN THE END THEREOF IS ENGAGED WITHIN A SELECTED APERTURE OF SAID EXTENSION ELEMENT, TO A SECOND POSITION FREE AND CLEAR THEREOF, MEANS INTERCONNECTING SAID EXTENSION ELEMENT AND SAID UPPER TUBULAR SECTION, AND OPERATING TO LIMIT THEM TO RELATIVE LONGITUDINAL MOVEMENT ONLY, AND A FOOT PLATE DETACHABLY SECURED TO THE LOWER END OF SAID LOWER TUBULAR SECTION AT A POINT OFFSET FORWARDLY FROM THE GEOMETRICAL CENTER OF SAID PLATE WHEREBY THE INSTRUMENT WHEN LIFTED BY EITHER OF SAID FIRST AND SECOND HAND GRIPS, HAS SUBSTANTIALLY NO TENDENCY TO TILT, AND FOUR TIPS OF RESILIENT MATERIAL SECURED TO THE LOWER SURFACE OF SAID FOOT PLATE IN EQUIANGULARLY-SPACED RELATION ABOUT AND RADIALLY OF SAID POINT.