Prosthetic attachment system and corresponding lock assembly
A prosthetic attachment system and corresponding lock assembly are provided for connecting a distal end of a prosthetic liner to a distal end of a prosthetic socket, by combining vacuum suspension and mechanical suspension. An attachment pin extends from a distal end of the prosthetic liner. A connector assembly secures to a distal end of the prosthetic socket and is adapted for receiving and locking to the attachment pin. A lanyard assembly has a first end secured to the connector assembly and a second end extending outwardly from the distal end of the prosthetic socket and adapted to secure to an exterior surface of the prosthetic socket by an external securing system.
1 . A lock assembly for a prosthetic socket system adapted to secure a prosthetic liner to a prosthetic socket, the lock assembly comprising:
an attachment pin arranged to extend from a distal end of the prosthetic liner;
a connector assembly secured by a distal end of the prosthetic socket, and adapted for receiving and locking to the attachment pin;
a lanyard assembly having a first end secured to the connector assembly and a second end extending outwardly from the distal end of the socket and adapted to secure to an exterior surface of the prosthetic socket by an external securing system.
2 . The lock assembly of claim 1 , wherein the attachment pin and the connector assembly are coaxial along an axis of the prosthetic socket system.
3 . The lock assembly of claim 1 , further comprising a lock body mounted to the distal end of the prosthetic socket, the connector assembly being retained by the lock body.
4 . The lock assembly of claim 3 , wherein the prosthetic socket includes a distal connector onto which the lock body is removably secured.
5 . The lock assembly of claim 3 , wherein the lock body defines a channel through which the lanyard assembly extends from the connector assembly to the exterior of the prosthetic socket.
6 . The lock assembly of claim 1 , wherein the attachment pin is arranged to extend from a proximal connection of the prosthetic liner, the attachment pin, and the connector assembly form a latch connection located distally from the proximal connection.
7 . The lock assembly of claim 6 , wherein a lock body defines a channel through which the lanyard assembly extends from the connector assembly to the exterior of the prosthetic socket;
wherein the connector assembly forms a mount housing located distally from the latch connection;
wherein the connector assembly has a mount in the mount housing to which the first end of the lanyard assembly secures and communicates to the channel to permit extension for the lanyard assembly therethrough.
8 . The lock assembly of claim 1 , wherein the external securing system includes a buckle assembly arranged to engage the lanyard assembly.
9 . The lock assembly of claim 8 , wherein the lanyard assembly defines a ratchet strap as having a gripping portion formed by at least two teeth.
10 . The lock assembly of claim 8 , wherein the lanyard assembly defines a ratchet strap having a gripping portion formed by at least two teeth;
wherein the buckle assembly defines a tensioning lever engaging at least one tooth of the at least two teeth, the tensioning lever being biased toward the at least one tooth.
11 . The lock assembly of claim 10 , wherein the buckle assembly includes a locking lever counteracting the tensioning lever, and engaging at least one tooth of the at least two teeth; and
wherein the buckle assembly further includes a release lever engaging both the tensioning lever and the locking lever; the buckle assembly including a frame on which the tensioning lever, release lever and the locking lever cooperatively rotate.
12 . The lock assembly of claim 11 , wherein the lanyard assembly includes an elongate strap coupled at a first end to the buckle assembly and having a second end secured to a bracket of the exterior securing system, and located proximally along the exterior surface of the prosthetic socket relative to the buckle assembly.
13 . A strap connection for a prosthetic socket system adapted to secure a prosthetic liner to a prosthetic socket, comprising:
an attachment pin extending from a distal end of the prosthetic liner;
a lock assembly secured by a distal end of the prosthetic socket, and adapted for receiving and locking to the attachment pin;
a strap assembly having a first end secured to the lock assembly and a second end extending outwardly from the distal end of the prosthetic socket and adapted to secure to an exterior surface of the prosthetic socket by an external securing system.
14 . The strap connection of claim 13 , wherein the lock assembly defines an outlet for an elongate element of the strap assembly, the elongate element biased about a bracket having a hook.