1978-11-13
1980-11-11
Frinks, Ronald L.
3 26, A61F 104, A61F 106
Patent
active
042324050
ABSTRACT:
An artificial elbow joint comprises a detent wheel rotatably mounted on the forearm and fixedly connected to the upper arm, the detent wheel having a periphery defining a series of detent notches and a lug affixed thereto and projecting from the periphery. A latch is slidably mounted in relation to the detent wheel and a spring biases the latch against the detent wheel into a first position wherein the tip of the latch engages a respective detent notch to lock the joint. A cable line is attached to the latch and is operable to move it into a second position wherein the latch tip is disengaged and the joint is unlocked, operation of the cable line pivoting the forearm in relation to the upper arm. A leaf spring having an angularly bent end is displaceable between the notched detent wheel periphery and the latch by the lug to retain the latch in the second position.
REFERENCES:
patent: 423840 (1890-03-01), Ulmer et al.
patent: 1402709 (1922-01-01), Blatchford
patent: 3172127 (1965-03-01), Tolotti
patent: 3382506 (1968-05-01), Collins et al.
patent: 4038706 (1977-08-01), Ober et al.
patent: 4067070 (1978-01-01), Seamone et al.
Frinks Ronald L.
Kelman Kurt
Viennatone Gesellschaft m.b.H.
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