Cutlery
Patent
1981-01-21
1984-06-05
Apley, Richard J.
Cutlery
308217, 3 27, A61F 104
Patent
active
044519397
ABSTRACT:
Rotary joint apparatus for a prosthesis and the like having a first section 10 and a second section 16 joined by the joint is disclosed including a housing member A connected to one of the sections and a housing member B connected to the other of said sections. A shaft C rotatably connects the housing members. A roller bearing clutch assembly D rotatably connects the housing member B to shaft C and includes an outer bearing race 18 connected to housing member B having a plurality of circumferentially spaced tapered camming portions 32 forming generally wedge-shaped camming surfaces. A plurality of roller bearings 34 are positioned in the camming portions bearing against shaft C. The roller bearings have a first position in the camming portion in which the bearings are locked between a surface 32b of the camming portion and shaft C for locking and preventing rotation relative to the shaft in a first direction. The roller bearings have a second position in said camming portion in which said bearings are free between a camming portion surface 32a and the shaft permitting rotation between said shaft and housing member. Operator members E are carried concentric with shaft C and are operatively connected with roller bearings 34 for shifting position of the roller bearings in the camming portions. The clutch operator members have an unlocked position in which the clutch assembly is unlocked and the roller bearings are held in the second position to permit rotation in the first direction. The operator members have a clutch mode position in which the roller bearings are held thereby in their first position and rotation in the first direction is permitted. An actuator member, responsive to pressure on a portion of said foot prosthesis, is connected to the operator members for positioning the operator members in the unlocked and clutch positions.
REFERENCES:
patent: 2863684 (1958-12-01), Carroll
patent: 2870453 (1959-01-01), Vasquez
patent: 2943622 (1960-07-01), Nelson
patent: 3673613 (1972-07-01), Asbelle et al.
patent: 4003609 (1977-01-01), Juhas
Horn, "Electro-Control: An EMG-Controlled A/K Prosthesis", Med. & Biol. Engng., vol. 10, pp. 61-73, Pergamon Press 1972.
Apley Richard J.
Isabella David J.
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