Abstract: Surgical apparatus for inserting a plastic, split end, adjusting ring into the stroma of the cornea of the eye wherein the adjusting ring includes, as a part thereof, a dissecting head to part the stroma and provide a pathway for the adjusting ring as the ring is rotated. The ends of the adjusting ring are moved to change the shape of the cornea to a desired shape in accordance with the desired visual correction after which the ends of the adjusting ring are fixably joined to maintain the desired shape.

Abstract: A method for reprofiling or otherwise smoothing and enhancing the anterior or stromal cornea by scraping. The method is useful as a primary technique for reprofiling the stromal portion of the cornea following a lamellar keratectomy or as a secondary technique for use in combination with other corneal refractive procedure to dislocate debris and smooth and enhance a worked area of the cornea.

Abstract: Surgical apparatus for inserting a plastic, split end, adjusting ring into the stroma of the cornea of the eye wherein the adjusting ring includes, as a part thereof, a dissecting head to part the stroma and provide a pathway for the adjusting ring as the ring is rotated. The ends of the adjusting ring are moved to change the shape of the cornea to a desired shape in accordance with the desired visual correction after which the ends of the adjusting ring are fixably joined to maintain the desired shape.

Abstract: Refractive error of the cornea is corrected by a scraping procedure of rotating or oscillating, about a center axis of the cornea, a sharpened knife edge blade that is tangential to and against that portion of the cornea to be corrected, and microaxially advanced until the refractive error has been corrected.

Abstract: Refractive error of the cornea is corrected by a scraping procedure performed within a vacuum chamber formed above the cornea.

Abstract: Hyperopia (far-sighted) refractive error of the cornea is corrected by a scraping procedure of rotating or oscillating a tool having a central pressure pad with a plurality of curved sharpened knife-edge blades that initially are tangential to and against an outer zone or band of the cornea and micro-axially advanced until the refractive error has been corrected.

Abstract: Surgical apparatus for inserting a plastic, split end, adjusting ring into the stroma of the cornea of the eye wherein the adjusting ring includes, as a part thereof, a dissecting head to part the stroma and provide a pathway for the adjusting ring as the ring is rotated. The ends of the adjusting ring are moved to change the shape of the cornea to a desired shape in accordance with the desired visual correction after which the ends of the adjusting ring are fixably joined to maintain the desired shape.

Abstract: Surgical apparatus for inserting a plastic, split end, adjusting ring into the stroma of the cornea of the eye wherein the adjusting ring includes, as a part thereof, a dissecting head to part the stroma and provide a pathway for the adjusting ring as the ring is rotated. The ends of the adjusting ring are moved to change the shape of the cornea to a desired shape in accordance with the desired visual correction after which the ends of the adjusting ring are fixably joined to maintain the desired shape.

Abstract: Refractive error of the cornea is corrected by a scraping procedure of rotating or oscillating a sharpened knife edge blade that is tangential to and against a top of the cornea at its center axis, and micro-axially advanced until the refractive error has been corrected.

Abstract: Surgical apparatus for inserting a plastic, split end, adjusting ring into the stroma of the cornea of the eye wherein the adjusting ring includes, as a part thereof, a dissecting head to part the stroma and provide a pathway for the adjusting ring as the ring is rotated. The ends of the adjusting ring are moved to change the shape of the cornea to a desired shape in accordance with the desired visual correction after which the ends of the adjusting ring are fixably joined to maintain the desired shape.

Abstract: An improved hydraulic motor for downhole oil and gas wells to drive a sidewall core cutting apparatus comprising; a motor housing having a fluid inlet channel and a fluid outlet channel directed essentially parallel to each other and tangentially intersecting a rotor cavity with the motor housing containing an eccentrically positioned rotor with radially movable vanes within the rotor in a manner such that the fluid flow enters the cavity essentially tangentially and flows around the rotor and exits tangentially on the other side of the cavity. Such a hydraulic motor exhibits significant improvement in torque and power output at a given hydraulic power input when compared to previous hydraulic motors employed in such applications.

Abstract: This invention relates to an apparatus for cutting cores from the sidewall of a borehole after the borehole has been drilled. The apparatus includes an elongated housing which supports guide means which provides a path along which a core bit and motor can be moved to extend and retract the core bit. The guide means has a rotational control section and a transverse control section. The rotation control section guides the motor and its core bit from an upright position in the housing to a selected angle and the vertical transverse control section guides the coring bit means in the direction of the formation.

Abstract: A filament type vegetation trimmer having a rotating hollow output shaft through which monofilament line projects beyond the gyrator trimming end providing cutting means to trim grass and weeds. A gyrator head is attached to the trimming end of the shaft and is provided with a bell-shaped opening therein off-center from the central axis of the gyrator head creating a fulcrum point to cause the filament to extend transversely and lie within a groove in the head to form a rotary whip for trimming. An alternate embodiment of the gyrator head includes a bell-shaped opening in the head coaxial with the shaft and having a filament directing means, such as a conical plug or screw, extending into the opening coaxial with the shaft to cause the filament to extend outward forming a rotary whip for trimming.

Abstract: A method of core cutting and apparatus operable on a seven conductor wireline logging cable for drilling a hole in the sidewall of a drill hole which comprises an elongted housing with a hydraulically operated backup shoe mounted within the housing for wedging the housing at a selected location in the drill hole and a hydraulic motor with a drilling bit connected thereto for rotation by the hydraulic motor. Hydraulic means are mounted within the housing and are connected to the hydraulic motor for moving the bit into drilling engagement with the sidewall of the drill hole. In one embodiment, a core cutting bit is connected to the motor for obtaining a sample of a subterranean formation at the selected location.

Abstract: An improved filament trimmer of the type in which a rotary drive means having a hollow filament feed shaft is frame mounted and has an improved slinger head attached to said hollow shaft with an arcuate bore therethrough in open communication with the hollow shaft for swinging the cutting filament line in a radial plane to the shaft axis. A positive filament feed control is used for metering the cutting line to or from the slinger head.

Abstract: Filament-type vegetation trimmer (10) having a rotating hollow output shaft (28) through which monofilament line (22) projecting beyond (56) the gyrator trimming end of the output shaft provides the cutting means to trim grass and weeds. A transverse bar (44) across the output shaft trimming end creates a fulcrum point (52) for the filament which extends through an opening (46) left by the bar.