(12) United States Patent ao) Patent No.: us 6,267,787 Bi
Capper et al. (45) Date of Patent: Jul. 31,2001
(54) PROSTHETIC ATTACHMENT LOCKING ASSEMBLY HAVING PROSTHETIC ATTACHMENT LOCK
(75) Inventors: James W. Capper; Robert E.
Arbogast, both of Mt. Sterling; Jeffrey
L. Doddroe, Washington C.H.; James
M. Colvin, Hilliard, all of OH (US)
(73) Assignee: Ohio Willow Wood Company, Mount Sterling, OH (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/357,855
(22) Filed: Jul. 21, 1999
(51) Int. C I. A61F 2/62
(52) U.S. CI 623/36; 623/33; 623/34
(58) Field of Search 623/27, 32, 33,
623/34, 35, 38; 403/105, 152, DIG. 4
(56) References Cited
U.S. PATENT DOCUMENTS
5,226,918 * 7/1993 Silagy et al 623/32
5,702,489 * 12/1997 Slemker 623/34
5,888,234 * 3/1999 Littig 623/38
* cited by examiner
Primary Examiner—Bruce Snow
(74) Attorney, Agent, or Firm—Obion, Spivak, McClelland, Maier & Neustadt, P.C.
A prosthetic attachment locking assembly includes a distal adaptor fittable in the bottom of a socket for a residual limb stump and has an upper surface configured to accept an end of a stump liner. The internal surface of the socket merges smoothly with the upper surface of the distal adaptor. The distal adaptor has a pin bore through which a lock pin of the stump liner may extend, and a lower surface having a plurality of projections. A lock body of a prosthetic attachment lock has a pinion gear engagable with the lock pin to lock the lock pin, and an upper surface matably engagable with the projections such that the lock body and the distal adaptor may be connected via the projections and the upper surface of the lock body. The pinion gear is mounted to a centering axle. A one-way clutch for the pinion gear incorporates a sleeve non-rotatably mounting the centering axle such that the centering axle does not bind when it is pressed to move longitudinally. The centering axle is thus movable against a biasing force of a spring to disengage the gear from the lock pin.
6 Claims, 4 Drawing Sheets