Abstract: A surgical tool for folding and inserting a folded lens into the anterior chamber of an eye through a small incision in the limbus of the eye includes an elongated tube which is longitudinally split into a U-shaped base section and a manually, axially slidable U-shaped cover section. The tube has an elongated, inner portion, which is inserted into the anterior chamber of the eye, and an outer portion. A tubular guide sleeve encircles the outer portion of the base section. A cylindrically-shaped plug is positioned within the base section and sleeve to provide an arcuate space between the plug and the inner wall of the sleeve. The cover section is slidably inserted within the space for guiding and positioning the cover section for overlapping or uncovering the inner end portion of the base section. Means are provided for folding and pressing a lens into the base and holding it there until the cover section is manually slid over the base to encircle the lens within the tube inner portion.

Abstract: The disclosed Power Shift Mechanism is adapted to laterally shift an earth working implement, such as a vertical plow, relative to a tractor or the like. In the disclosed embodiment, the plow is mounted on a slide bracket and the bracket is slideably mounted on a support frame. The shift mechanism includes a fluid operated piston-cylinder connected between the frame and a pivot link pivotally connected to the slide bracket. The pivot link may be rotated by the piston-cylinder to either of two positions and locked in place by releasable connectors. The piston-cylinder will then rotatably shift the pivot link or laterally shift the bracket and the earth working implement. The shift mechanism thus increases the effective stroke of the piston-cylinder and reduces the power requirements of the shift mechanism.