Knee disarticulation/low-profile prosthetic knee-joint assembly including adjustable distal coupling

A prosthetic knee-joint assembly for a prosthetic limb comprising:

• a proximal segment having a surface adapted for mounting to an above-knee prosthetic limb socket;
• a distal segment pivotally disposed with respect to the proximal segment and pivotable with respect to the proximal segment in at least an anterior-posterior direction to provide a knee-joint pivot point;
• a coupling provided with the distal segment, including an adjustable member having a frustopyramidal boss extending distally with respect to the distal segment, the frustopyramidal boss being adapted to mount the distal segment to below-knee prosthetic limb components, and the frustopyramidal boss being slidably adjustable with respect to the distal segment so as to be slidable in at least one of the anterior-posterior and medial-lateral directions, and rotatably adjustable with respect to the distal segment;
• a first releasable lock adapted to selectively prohibit rotation of the frustopyramidal boss with respect to the distal segment;
• and
• a second releasable lock adapted to selectively prohibit sliding of the frustopyramidal boss with respect to the distal segment;
• wherein
• the adjustable member is an assembly that includes a sliding member and a rotating member, the sliding member having a cavity occupied by a proximal portion of the rotating member, the cavity having an annular surface that faces, at least partially, the proximal direction;
• the rotating member including the frustopyramidal boss, which extends distally from the cavity in the sliding member;
• wherein
• the proximal portion of the rotating member includes an annular surface complimentary to, substantially coaxial with, and facing the annular surface of the cavity;
• wherein
• the sliding member includes a pair of opposed surfaces, each being parallel to the respective direction of slideability, and the pair of opposed surfaces facing at least partially in a distal direction;
• wherein
• the distal segment includes a pair of opposed surfaces complimentary to, substantially parallel to, and facing the pair of opposed surfaces of the adjustable member;
• and wherein
• the coupling includes a mechanical press operative to pull the frustopyramidal boss in the distal direction, such that the annular surface of the proximal portion of the rotating member engages annular surface of the cavity in the sliding member, thereby providing the first releasable lock, and thereafter upon further application of the mechanical press, the combination of the rotating member and sliding member are pulled in the distal direction such that the pair of opposed surfaces of the sliding member presses against the complimentary pair of opposed surfaces of the distal segment, thereby providing the second releasable lock;
• wherein the distal segment includes a distal opening through which the coupling extends.

A prosthetic knee-joint assembly for a prosthetic limb comprising:

• a proximal segment having a surface adapted for mounting to an above-knee prosthetic limb socket;
• a distal segment pivotally disposed with respect to the proximal segment and pivotable with respect to the proximal segment in at least an anterior-posterior direction to provide a knee-joint pivot point;
• and
• a male coupling provided on the distal segment, the male coupling including a frustopyramidal boss extending outwardly from the one segment substantially approximate the TKA line, the frustopyramidal boss being adapted to mount the distal segment to a female coupling carried on another prosthetic limb component, and the frustopyramidal boss being slidably adjustable with respect to the distal segment so as to be slidable in at least one direction substantially perpendicular to the TKA line, and the frustopyramidal boss being rotationally adjustable with respect to the distal segment so as to be rotatable with respect to the distal segment on a rotational axis substantially parallel to the TKA line;
• wherein
• the male coupling is an assembly that includes a sliding member slidably carried by the distal segment and a rotating member rotatably carried by the sliding member;
• wherein
• the rotating member has a first end carried by the sliding member and an opposite end that includes the frustopyramidal boss;
• wherein
• the distal segment includes a dove-tall shaped channel at least partially bounding an opening extending trough an end surface thereof;
• the sliding member includes at least a portion that has a dove-tail shaped cross-section complementary to the dove-tail shaped channel in the distal segment, the portion being slidably carried in the dove-tail shaped channel;
• and wherein
• the sliding member includes an annular cavity extending into an end surface thereof, the annular cavity retaining the first end of the rotating member therein;
• and
• at least a portion of the male coupling extends through the opening in the distal segment.

A prosthetic knee-joint assembly for a prosthetic limb comprising:

• a proximal segment including a planar proximal surface adapted for mounting to an above-knee prosthetic limb socket;
• a distal segment pivotally disposed with respect to the proximal segment, and pivotable with respect to the proximal segment in at least the anterior-posterior direction to provide a knee-joint pivot point, the distal segment including a planar distal surface and a proximal groove extending along an open bottom on a backside of the distal surface;
• a coupling including a bearing portion slidably received within the proximal groove and further including a frustopyramidal boss extending in a distal direction from the bearing portion, the frustopyramidal boss being rotatable with respect to the bearing portion and adapted to mount the distal segment to below-knee prosthetic limb components;
• a first releasable lock adapted to selectively prohibit rotation of the frustopyramidal boss with respect to the bearing portion;
• and
• a second releasable lock adapted to selectively prohibit sliding of the bearing portion in the groove.

A prosthetic knee-joint assembly for a prosthetic limb comprising:

• a proximal segment having a surface adapted for mounting to an above-knee prosthetic limb socket;
• a distal segment pivotally disposed with respect to the proximal segment and pivotable with respect to the proximal segment in at least an anterior-posterior direction to provide a knee-joint pivot point;
• and
• a coupling provided with the distal segment, including an adjustable member having a frustopyramidal boss extending distally with respect to the distal segment, the frustopyramidal boss being adapted to mount the distal segment to below-knee prosthetic limb components, and the frustopyramidal boss being slidably adjustable with respect to the distal segment so as to be slidable in at least one of the anterior-posterior and medial-lateral directions, and rotatably adjustable with respect to the distal segment;
• wherein
• the distal segment and the coupling include visual indicia for determining the position of the coupling relative to the distal segment.

A prosthetic knee-joint assembly for a prosthetic limb comprising:

• a proximal segment adapted to be coupled to an above-knee prosthetic limb component;
• a distal segment pivotally disposed with respect to the proximal segment and pivotable with respect to the proximal segment in at least an anterior-posterior direction to provide a knee-joint pivot point;
• and
• a coupling provided with the distal segment, including an adjustable member having a frustopyramidal boss extending distally with respect to the distal segment, the frustopyramidal boss being adapted to mount the distal segment to below-knee prosthetic limb components, and the frustopyramidal boss being slidably adjustable with respect to the distal segment so as to be slidable in at least one of the anterior-posterior and medial-lateral directions, and rotatably adjustable with respect to the distal segment;
• wherein the distal segment includes a through hole limiting medial-lateral travel of the frustopyramidal boss.