Surgery – Truss – Pad
Patent
1985-10-03
1987-03-10
Croyle, Carlton R.
Surgery
Truss
Pad
A61B 1722, A61M 2900
Patent
active
046484027
ABSTRACT:
A surgical instrument for dilating blood vessels comprises: a front multilinkage mechanism; an intermediate hollow cable-wire structure combination; and a rear manually operated control mechanism. The rear manually operated control mechanism further comprises: a rearmost thumb ring being connected to a stationary member; and index finger and ring finger rings being connected to a longitudinally movable member. Motion of the index finger and the ring finger rings relative to the thumb ring causes similar motion of a wire which is located in the hollow cable. The front multilinkage mechanism further comprises: a plurality of longitudinal ribs being located on a rear stationary section; a similar plurality of rear linkages; a similar plurality of front linkages; and a similar plurality of longitudinal ribs being located on a movable front section. The front end of the wire runs through the rear stationary section to the front stationary section and has attached thereto a spherical ball adjacent the rear linkages. The frontmost end of the wire inserts into and moves freely within the front stationary section. Rearward actuation of the index finger and ring finger rings relative to the thumb ring causes similar rearward motion of the wire thereby causing similar rearward motion of the sphere. The rear surface of the sphere then applies a force to the internal edges of the rear linkages thereby causing the multilinkage mechanism to open and expand. Forward actuation of the index and ring finger rings relative to the thumb ring causes similar forward motion of the wire thereby causing similar forward motion of the sphere. The rear surface of the sphere loses contact with the internal edges of the rear linkages thereby causing the multilinkage mechanism to collapse and close. In the closed configuration, the sphere is neatly contained within the internal concave edges of the rear linkages. Entry of the multilinkage mechanism into the tissue is enhanced by a convex front surface on the movable front section and by slanted front edges of on the front ribs; and exit out of the tissue is enhanced by convex rear edges on the rear stationary section and the slanted rear edges of the rear ribs. The front linkages and the stationary front section of the multilinking mechanism are displaced rearwardly in the open configuration and are displaced anteriorly in the closed configuration. A set screw located on the rear manually operated control mechanism allows for maintaining the front multilinkage mechanism in the open or closed configurations or any configuration therebetween.
REFERENCES:
patent: 1677671 (1928-07-01), Councill
patent: 3147749 (1964-09-01), Marsh
patent: 4281658 (1981-08-01), Child
patent: 4320762 (1982-03-01), Bentov
patent: 4467790 (1984-08-01), Schiff
patent: 4574800 (1986-03-01), Peers-Trevarton
Croyle Carlton R.
Obee Jane E.
Oliveras R. Martin
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