Alignable coupling assembly for connecting two prosthetic limb components

Abstract

An alignable coupling assembly embodiment for coupling distal and proximal prosthetic components includes a pair of parallel circular plates rotatably disposed in the circular receptacle of a support plate. The circular plates are configured such that they can be unpressed or a pressed. The unpressed condition allows rotation of the paired plates and the pressed condition prevents such rotation by way of a first friction lock. The paired circular plates further have a rectangular slot into which a longitudinal connector is slidably disposed, and which is subject to a second friction lock that prevents sliding when the connector is pulled distally. Rotational movement of the plates and sliding movement of the connector in the slot cooperate to allow its positioning at any point within an anterior-posterior / lateral medial grid centered on the longitudinal axis of the proximal prosthetic component. A distal pull on the longitudinal connector engages both first and second friction locks.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 14 / 703,481 entitled “ALIGNABLE COUPLING ASSEMBLY FOR CONNECTING TWO PROSTHETIC LIMB COMPONENTS,” filed May 4, 2015, which claims priority to U.S. Provisional Patent Application No. 61 / 988,824, filed May 5, 2014. The full disclosures of the above-listed patent applications are hereby incorporated by reference for all purposes.INCORPORATION BY REFERENCE[0002]All publications and patent applications mentioned in this specification are herein incorporated by reference to the same extent as if each such individual publication or patent application were specifically and individually indicated to be so incorporated by reference.TECHNICAL FIELD[0003]The technology relates to an alignable coupling assembly to connect two structural elements together to provide stabilizable, rotational capability and alignment adjustment of one structural element with respect to the other. More ...

AI Technical Summary

Benefits of technology

The patent is about a coupling assembly that includes two circular plates and a support plate. The plates can be adjusted between an unpressed and a pressed condition, and the support plate and plates are coplanar. The assembly allows for aligning and tightening of prosthetic components together using bolts. This results in a friction lock between the plates and the receptacle, preventing rotation of the plates. The technical effect is a more secure and precise alignment of prosthetic components for improved outcomes.

Problems solved by technology

If the prosthetic socket does not fit properly, it can be uncomfortable for the patient, even to a level of intolerability.

If the fit is poor, even to a minor degree, functionality of the distal prosthetic component is compromised.

If alignment is wrong, the prosthetic socket can become uncomfortable when worn, even if it ostensibly fits well.

And similarly, if alignment between the prosthetic socket and the distal functional prosthetic element or device is wrong, the functionality of the distal device can also be severely compromised.

Excessive build height can be problematic for individuals with a relatively long transfemoral amputation or a knee disarticulation amputation in that the prosthetic knee becomes located at a greater length from the hip than is the intact contralateral knee.

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