Articulated tool-holding arm

Details Articulated tool-holding arm Articulated tool-holding arm

1995-08-07

1997-03-11

Apley, Richard J.

Surgery

Specula

Retractor

600102, 600227, 600228, 285166, 403 56, 403 71, 403 83, 2482781, A61B 1702

Patent

active

056095651

ABSTRACT:
Each pivotal shaft normally urged in one direction by the urging means drives the movable barrel to push the pressure spring, so that the clutch disposed either to the inner ball or to the outer ball in each joint is brought into press contact with the other ball to lock the joint. Accordingly, once the holding arm holds a tool, the holding force of the arm does not decline with time. Since the pressure applied to the pressure spring by the movable barrel is released by turning the pivotal shaft in the opposite direction by the driving means, each joint assumes an unlocked state. Thus, the tool held at the free end portion of the holding arm can be moved to a desired position, and also the holding position can be changed very easily.

REFERENCES:
patent: 2608192 (1952-08-01), Heitmeyer et al.
patent: 3638973 (1972-02-01), Poletti
patent: 3858578 (1975-01-01), Milo
patent: 4143652 (1979-03-01), Meier et al.
English language abstract of Japanese Specification for invention titled Locating Apparatus for Cranial Operating Site, Pre-Examination of Patent Publication No. Sho 62-327, Jan. 6, 1987.

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