Patent ID: 6436018
Filing Date: 2002-08-20
Classification: A61F,A61H,A63B

Abstract:
An adjustable rotation radius articulated joint for a gym machine and knee tutor situated in correspondence of the knee of a user, comprising:a cover element (8) fixed to one end of a center pin (1.2); a first plate (1) having a femorial arm (1.1) adapted for attachment to the gym machine or to the thigh of the user, the femorial arm (1.1) having a longitudinal axis of symmetry; a second plate (6, 7) having a distal arm; a third plate (4, 5); and a fourth plate (3), said second, third and fourth plates being fixed together to rotate between the cover plate (8) and an element fixed to the other end of the center pin (1.2), wherein: the second plate comprises a first semi-plate (6), a second semi-plate (7) and an adjustment screw (18) engaged between the first and second semi-plates to personalize the joint for the knee of the user; the second plate has a first slot (10) provided partially in the first semi-plate (6) and partially in the second semi-plate (7); the first plate (1) has a second slot (9) that extends along the longitudinal axis of symmetry of the femorial arm (1.1); the second plate (6) and the third plate (4, 5) are fixed to rotate together; the second, third and fourth plates are each provided with a cross-through hole (31), all of said cross-through holes (31) being coaxial with one another; the first plate (1) is provided with a peripheral pin (1.3) that slidably engages in the first slot (10); and the center pin (1.2) has a feather key (30) lodged in the second slot (9), the center pin (1.2) serving as a center of rotation on the first plate (1) for the second, third and fourth plates.