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10550results about "Large fixed members" patented technology

Positioning device having two object holders

A positioning device has first and second object holders that are guided over a guiding surface extending parallel to an X-direction and parallel to a Y-direction perpendicular to the X-direction and which are displaceable over the guiding surface from a first position into a second position by means of a displacement system. The displacement system includes a first displacement unit and a second displacement unit to which the object holders can be alternately coupled. The first displacement unit is suitable for carrying out a first series of positioning steps of the first object holder in the first position and for displacing the first object holder from the first position into an intermediate position between the first and second positions. The second displacement unit is suitable for carrying out a second series of positioning steps of the second object holder in the second position, simultaneously with and independently of the first displacement unit, and for displacing the second object holder from the second position into the intermediate position. In the intermediate position, the object holders are exchanged, after which the first series of positioning steps can be carried out by the first displacement unit with the second object holder in the first position and the second series of positioning steps can be carried out by the second displacement unit with the first object holder in the second position. The positioning device is suitable for use in a lithographic device to carry out an exposure process with a first semiconductor substrate in an exposure position and, simultaneously therewith and independently thereof, a characterization process with a second semiconductor substrate in a characterization position.
Owner:ASML NETHERLANDS BV

Movable clamping working table for round steel machining

The invention relates to the field of machining equipment, in particular to a movable clamping working table for round steel machining. The movable clamping working table comprises a table top, a rotating table, a two-way lead screw and a movable bracket, the upper surface of the table top is rotationally connected with the rotating table, a sliding groove is formed in the upper surface of the rotating table, the two-way lead screw is mounted inside the sliding groove, the outer side wall of the rotating table is fixedly connected with a clamping motor, the movable bracket sleeves the two-waylead screw, a guiding groove is longitudinally formed in the side wall of the movable bracket, a lifting lead screw is arranged in the guiding groove, a lifting block sleeves the lifting lead screw, and a clamping mechanism is mounted on the side wall of the lifting block. By arranging the two-way lead screw and the movable bracket, the end of round steel is clamped by a clamping plate to completeclamping action, the clamping speed is high, the working efficiency is greatly improved, by arranging the lifting block and the lifting lead screw, the height of the round steel can be adjusted according to the actual machining needs, and by arranging universal wheels capable of rising and falling, the movable clamping working table can be conveniently pushed to move.
Owner:蒋艳红

Stent crimping method

An apparatus for crimping a stent by segmental radial compression, comprising a stationary base member; a rotatable drive hub which is moveable in relation to the stationary base member; and a crimping head aligned with respect to the stationary base member and to the rotatable drive hub. The crimping head includes at least ten segments. The segments each have a proximal end and an angled distal end with at least one angled side face terminating in an edge of a predetermined length, each segment having a centerline between the proximal and distal ends, each segment having a proximal point and a distal point, the distal point being disposed on the centerline and the proximal point being disposed off the centerline, and the proximal point being pivotally coupled by pins to the stationary base member and the distal point being pivotally coupled by pins to the rotatable hub member. The segments are arranged so that the segment distal ends are disposed adjacent to and a predetermined distance away from a central point and defining a central aperture with a cylindrical dimension. Also, the segment centerlines extend therefrom toward the segment distal ends and are oriented away from the central point. The segment distal ends move closer to the central point upon rotation of the rotatable hub member in a predetermined direction, whereby the stent is disposed around a base substrate, aligned in the central aperture and crimped round the base substrate upon rotation of the rotatable hub. A method of crimping a stent is also disclosed.
Owner:MACHINE SOLUTIONS
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