Rotary joint especially for a knee prosthesis

Details Rotary joint especially for a knee prosthesis Rotary joint especially for a knee prosthesis

1986-11-05

1989-01-03

Apley, Richard J.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Leg

623 43, 623 39, 623 59, A61F 274

Patent

active

047954744

ABSTRACT:
A rotary joint, especially for a prosthesis, e.g. to allow a user to assume the lotus position, as a pair of relatively rotating parts including an outer part and an inner part braced at coaxial bosses by tapered rollers forming a play-eliminating tapered roller bearing. An inclined roller bearing is provided between outer peripheries of disk portions of these parts. A housing enclosing the parts contains a locking device in which a locking element is spring biased to engage the parts with teeth of the locking element engaging in teeth of the two parts. A push-button can be depressed to retract the locking element and permit relative rotation.

REFERENCES:
patent: 1008048 (1911-11-01), Mueller
patent: 2594533 (1952-04-01), Baker
patent: 2866673 (1988-12-01), Van Der Knoop
patent: 3172127 (1965-03-01), Tolotti
patent: 3538516 (1970-11-01), Bailey et al.
patent: 3837010 (1974-09-01), Prout
patent: 3956775 (1976-05-01), Moore
patent: 4023215 (1977-05-01), Moore
patent: 4186449 (1980-02-01), Horvath
patent: 4308419 (1981-12-01), Fredriksson
patent: 4351070 (1982-09-01), Blatchford
patent: 4619660 (1986-10-01), Christiansen et al.

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