摘要:
The present invention provides a self-sensing tweezer device for micro and nano-scale manipulation, assembly, and surface modification, including: one or more elongated beams disposed in a first configuration; one or more oscillators coupled to the one or more elongated beams, wherein the one or more oscillators are operable for selectively oscillating the one or more elongated beams to form one or more “virtual” probe tips; and an actuator coupled to the one or more elongated beams, wherein the actuator is operable for selectively actuating the one or more elongated beams from the first configuration to a second configuration.
摘要:
A symmetric ultra-precision spindle design in which all forces of constraint are, within the tolerances of manufacturing and assembly processes, symmetrically arranged about its axis. Additionally this design may require little or no external power other than the forces to rotate the spindle.
摘要:
An oscillating probe of an elongated rod, having a first free end, and a second end that is attached to at least one actuator to apply oscillation cycles to the rod. Oscillation of the elongated rod during at least one complete cycle of oscillation of the actuator causes the free end to move in at least one-dimensional envelope, producing a defined virtual probe tip geometry at the free end. The probe is connected to a system for utilizing information sensed as the free end is placed near a surface.
摘要:
An electronic expansion valve (EEV) controller allows a user to drive the stepper motor of EEVs. Thus, the EEVs can be toggled between an open position or a closed position. The EEV controller includes a housing, a portable power supply, a motor driver printed circuit board (PCB), a power switch, a directional switch, and a motor connector. The housing is used to protect and hold in place the motor driver PCB, the portable power supply, the power switch, the directional switch, and the motor connector. The portable power supply is used to provide electrical energy to the motor driver PCB and to the stepper motor of EEVs through the motor connector. The power switch allows a user to manually turn on or off the EEV controller and the stepper motor. The directional switch is used to toggle the stepper motor between a clockwise rotation or a counter-clockwise rotation.
摘要:
Systems and methods for imaging a volume-of-interest, which may include an object or point of interest to be analyzed in a display of three-dimensional data.
摘要:
The present invention includes a novel polyol prepolmer including an aliphatic amine, aromatic amine, or a mixture of both aliphatic and aromatic amines with an epoxy functional silicone to produce the novel polyol prepolymer chain extender. In another aspect of the invention, the novel polyol prepolymer chain extender is reacted with a polyisocyanate to produce a novel silicone modified polyurea having improved adhesion, chemical resistance, UV stability, and decreased shrinkage properties.
摘要:
A feed screw and nut mechanism includes a nut having an internally threaded bore which threadingly engages an externally threaded feed screw. A runner bearing is attached to the nut and projects outwardly therefrom, and a dummy runner bearing is attached to the nut and projects outwardly therefrom and is angularly displaced from the runner bearing about the feed screw axis. The mechanism includes a stationary runner defining a runner surface that is engaged by the runner bearing to prevent rotation of the nut, and a dummy runner defining a dummy runner surface that engages the dummy runner bearing. The dummy runner and dummy runner bearing are biased toward each other such that the nut is rotatably biased in a direction to urge the runner bearing against the runner surface. The nut includes at least one rotatable drive bearing having a rotation axis perpendicular to the feed screw axis, and at least one rotatable driven bearing connected to the carriage and having a rotation axis perpendicular to both the feed screw axis and to the axis of the drive bearing. The drive and driven bearings make contact at their cylindrical surfaces to form a crossed bearing coupling for minimizing transmission to a carriage of force components which are not parallel to the axial direction along which the carriage travels. In a preferred embodiment, the nut mechanism includes a slave carriage, connected to the carriage, which supports a pair of crossed bearing couplings and which is rotatably connected to the nut to isolate the slave carraige from rotation of the nut about a transverse axis.
摘要:
The present invention provides a process for producing gel-coated, shaped articles wherein the total processing time is decreased compared to conventional processes and the physico-mechanical properties of the gel-coated, shaped articles produced therefrom are maintained.
摘要:
Systems and methods for selectively imaging objects in a display of multiple three-dimensional data-objects. Further features include the display of objects and the intersection of objects removed from the display with various types of visualization surfaces for removing data that obstructs the display of objects of interest.
摘要:
A pure-polyurea consisting of an A-component prepolymer consisting of at least one polyisocyanate and at least one secondary polyether amine; and a B-component prepolymer consisting of at least one aromatic diamine and at least one polyether amine. Additionally, the present invention is a golf ball having an outer cover consisting of a B-component prepolymer consisting of at least one secondary polyether amine or just aromatic diamine; with or without caprolactone monomer; and an A-component prepolymer which comprises at least one polyisocyanate. In another embodiment, the present invention is a golf ball having an outer cover consisting of an inner core; and an outer cover formed from a reaction casted layer pure polyurea composition consisting of an A-component prepolymer for said pure polyurea consisting of at least one polyisocyanate; at least one secondary polyether amine; and a B-component prepolymer for said pure polyurea consisting of at least one aromatic diamine.