초록 ▼

A joint mechanism having a movement between relative members about a center of rotation located at a point where a first line extends from one of the members intersects a second line extending from the opposite member is disclosed. Multiple joint mechanisms may be aligned together along with common

A joint mechanism having a movement between relative members about a center of rotation located at a point where a first line extends from one of the members intersects a second line extending from the opposite member is disclosed. Multiple joint mechanisms may be aligned together along with common lines being the axis of rotation of each joint mechanism to provide a concentric spherical joint mechanism. Concentric spherical joint mechanism may be used to assemble truss frame structures.

대표청구항 ▼

A joint mechanism comprising: a first member; a second member being pivotally moveable relative to the first member about a first point; a third member having a primary section and a secondary section, the primary section having a length equal to the distance between a second point and a fourth poin

A joint mechanism comprising: a first member; a second member being pivotally moveable relative to the first member about a first point; a third member having a primary section and a secondary section, the primary section having a length equal to the distance between a second point and a fourth point, and the secondary section having a length equal to the distance between the fourth point and a fifth point wherein a line extending through the second and fourth points intersects a line extending between the fourth and fifth points at a second angle, the third member being pivotally moveable relative to the first member about the second point; a fourth member having a lead section and a trail section the lead section having a length equal to the distance between a third point and the fourth point, and the trail section having a length equal to the distance between the fourth point and a sixth point wherein a line extending through the third and fourth points intersects a line extending through the fourth and sixth points at a first angle, the fourth member being pivotally moveable relative to the second member about the third point and pivotably moveable relative to the third member at the fourth point; a fifth member being pivotably moveable relative to the third member about the fifth point; a sixth member being pivotally moveable relative to the fourth member about the sixth point and being pivotally moveable relative to the fifth member about a seventh point; the sine of the first angle being equal to a first offset distance divided by a length of the trail section, wherein the length of the trail section is defined by the distance between the fourth point and the sixth point; the sine of the second angle being equal to a second offset distance divided by a length of the primary section, wherein the length of the primary section is defined by the distance between the second point and the fourth point; wherein movement of the first member relative to the sixth member occurs about a center of rotation located at a point where a first line extending from said first member intersects a second line extending from the sixth member, the first line being located a distance equal to the first offset distance from a line extending between the first and second points, the second line being located at a distance equal to the second offset distance from a line extending between the sixth and seventh points.