Abstract: A backlash eliminating device for helical gears is provided for a gear transmission system which includes a transmission shaft, two helical gears and a match gear. A sleeve mounted on the transmission shaft has an outer wall, an inner wall and at least two sections of spiral grooves penetrating through the outer wall and the inner wall. The sleeve includes a transmission part and two extremity parts. The transmission part is disposed between the spiral grooves, and is fixedly connected to the transmission shaft. The extremity parts are disposed outside of the spiral grooves. The helical gears are fixedly connected to the two extremity parts. The sleeve having the spiral grooves provides a preload spring force along an axial direction of the transmission shaft, so that the two helical gears are tightly engaged with the match gear.

Abstract: A backlash eliminating device for helical gears is provided for a gear transmission system which includes a transmission shaft, two helical gears and a match gear. A sleeve mounted on the transmission shaft has an outer wall, an inner wall and at least two sections of spiral grooves penetrating through the outer wall and the inner wall. The sleeve includes a transmission part and two extremity parts. The transmission part is disposed between the spiral grooves, and is fixedly connected to the transmission shaft. The extremity parts are disposed outside of the spiral grooves. The helical gears are fixedly connected to the two extremity parts. The sleeve having the spiral grooves provides a preload spring force along an axial direction of the transmission shaft, so that the two helical gears are tightly engaged with the match gear.

Abstract: An apparatus for eliminating backlash is disclosed, which is installed between a first planet gear and a second planet gear in a planetary gear set to be used for generating a preload elastic force in a direction perpendicular to the direction of an input torque of the planetary gear set so as to eliminate a two-way backlash of the planetary gear set.

Abstract: A cell colonies dissecting and transplanting apparatus comprises: a base, a platform, a feeding mechanism having at least three axis feeding means, a movable holder, a cutting means, a transplanting means, and a CCD image capturing means. The platform having the CCD image capturing means therebottom is disposed onto the base, and on the platform is defined with the holder for receiving a plurality of loading trays, so as to the original cell colonies and a plurality of media boards of subculture can be placed on the loading trays of holder, the holder can displace from a first axis feeding means and a second axis feeding means of feeding mechanism to moveably align with a first axis and a second axis.

Abstract: A micro pump device comprises a structure of chamber with centrally symmetric crossection, a needle compression unit and a traditional fluid extraction and injection unit. The needle compression unit combines with the chamber. The symmetric crossection is utilized to generate fine change in volume for fluid withdraw or discharge. It can be applied as a basic element to products requiring fine fluid withdraw and discharge resolution.

Abstract: A device for dissecting an object, such as a cell colony includes a handle and an incision knife module that can dissociate the colony into several colony pieces. In accordance with features of the invention, users can use this dissecting device to cut an object into several pieces quickly and smoothly at a time.

Abstract: A cell colonies dissecting and transplanting apparatus comprises: a base, a platform, a feeding mechanism having at least three axis feeding means, a movable holder, a cutting means, a transplanting means, and a CCD image capturing means. The platform having the CCD image capturing means therebottom is disposed onto the base, and on the platform is defined with the holder for receiving a plurality of loading trays, so as to the original cell colonies and a plurality of media boards of subculture can be placed on the loading trays of holder, the holder can displace from a first axis feeding means and a second axis feeding means of feeding mechanism to moveably align with a first axis and a second axis.

Abstract: A laser assisted machining method and device comprise a tool mount on which a laser head is disposed. A digital thermometer is disposed in a machining tool or on the tool mount for feeding data to a system controller. A laser is used to enable the blade of the machining tool to heat and soften a workpiece instantaneously. As the machining process is in progress, the chip is rapidly removed. The temperature of the tool tip is monitored by the digital thermometer for automatic control of the temperature of heating the workpiece by the laser, thereby keeping the temperature of the tool tip in a specific allowable range. The efficiency of the machining process and the surface precision are thus enhanced.

Abstract: A micro pump device comprises a structure of chamber with centrally symmetric crossection, a needle compression unit and a traditional fluid withdraw and discharge unit. The needle compression unit combines with the chamber. The symmetric crossection is utilized to generate fine change in volume for fluid withdraw or discharge. It can be applied as a basic element to products requiring fine fluid withdraw and discharge resolution.

Abstract: An organism cell auto-handling apparatus includes a platform, an organelle observation microscope unit, a piping device and a system controller. An organism cell auto-handling method using the aforesaid apparatus includes the steps of putting an organism cell sample on the platform, then using the organelle observation microscope unit to position a specific organelle of said organism cell sample and produce a corresponding coordinate data to the system controller, and then processing an organelle draw/injection action to the specific organelle by a micro needle of the piping device that is controlled by the system controller.

Abstract: Method and apparatus for automatically dynamically adjusting prestressed bearings of shaft are provided. The apparatus comprises a sleeve assembly having outer and inner sleeves sandwiched between the bearings. An inner diameter of outer sleeve is smaller than an outer diameter of inner sleeve. Hence, outer and inner sleeves are fitted together after cooling. Further, inner sleeve is compressed by the outer sleeve to extend axially. During rotation of shaft, the axial extension of inner sleeve is reduced because the radial expansion of outer sleeve is larger than that of inner sleeve due to an thermal expansion coefficient of outer sleeve larger than that of inner sleeve. This can reduce prestress of bearings without degrading a rigidity thereof.

Abstract: A device for dissecting an object, such as a cell colony includes a handle and an incision knife module that can dissociate the colony into several colony pieces. In accordance with features of the invention, users can use this dissecting device to cut an object into several pieces quickly and smoothly at a time.

Abstract: A laser assisted machining method and device comprise a tool mount on which a laser head is disposed. A digital thermometer is disposed in a machining tool or on the tool mount for feeding data to a system controller. A laser is used to enable the blade of the machining tool to heat and soften a workpiece instantaneously. As the machining process is in progress, the chip is rapidly removed. The temperature of the tool tip is monitored by the digital thermometer for automatic control of the temperature of heating the workpiece by the laser, thereby keeping the temperature of the tool tip in a specific allowable range. The efficiency of the machining process and the surface precision are thus enhanced.

Abstract: Method and apparatus for automatically dynamically adjusting prestressed bearings of shaft are provided. The apparatus comprises a sleeve assembly having outer and inner sleeves sandwiched between the bearings. An inner diameter of outer sleeve is smaller than an outer diameter of inner sleeve. Hence, outer and inner sleeves are fitted together after cooling. Further, inner sleeve is compressed by the outer sleeve to extend axially. During rotation of shaft, the axial extension of inner sleeve is reduced because the radial expansion of outer sleeve is larger than that of inner sleeve due to an thermal expansion coefficient of outer sleeve larger than that of inner sleeve. This can reduce prestress of bearings without degrading a rigidity thereof.

Abstract: A vertical/horizontal spindle head for machine tools having a main transmission shaft with a first bevel gear secured thereon, a lower rotatable housing having a bevel gear axle secured therein, an upper seat having a push/pull apparatus for axially moving the lower rotatable housing relative to the upper seat, a main shaft having a second bevel gear secured thereon, third and fourth bevel gears coaxially arranged on the bevel gear axle, and a curved coupling between the upper seat and the lower rotatable housing. Between the third and fourth bevel gears are springs to move the third bevel gear axially and maintain it in engagement with the first bevel gear. A slidable spline device is provided between the third bevel gear and the bevel gear axle. The slidable spline device is disengaged in a first position where the curved coupling is coupled and is engaged in a second position when the lower rotatable housing is pushed away from the upper seat by the push/pull apparatus and the curved coupling is uncoupled.

Abstract: A universal spindle head device for machine tools, comprising a spindle head with a main spindle, a built-in motor, a first rotating spindle with the end fixed to said spindle head and appearing an inclined angle of 45 degrees toward the main spindle of the machine tool, and its center having a hollow passage; a second rotating spindle with its center axial line located on identical plane to center axial line of said main spindle and first rotating spindle and appearing at an inclined angle of 45 degrees toward the spindle center of the first rotating spindle; and a drive device for driving the spindle head to enable it to rotate centering around the first rotating spindle and second rotating spindle and to change over in direction in order to perform five-side processing of workpiece.

Abstract: An improvement of spindle for vertical-horizontal machine tools, comprising a built-in motor type spindle, a rotating shaft, a drive device, and a locating-device, wherein the spindle is mounted on the machine tools by means of the rotating shaft; the rotating shaft maintains a 45.degree. incline toward the horizontal and vertical datum lines of the machine tools and is rotably driven by drive device to lead the spindle to change into vertical or horizontal manner; the locating device is provided for ensuring the spindle in accurate position. The characteristics of the invention are that the spindle mandrel is directly driven by a built-in motor within the spindle head; and the rotating shaft is defined to contain a hollow manner therein for the spindle pipelines and power cables to pass through its center.

Abstract: An automatic tool-exchanging device can be set on a robot for exchanging tools. It mainly comprises an upper and lower assemblies, and an engaging mechanism. The engaging mechanism includes a cam, which is to be driven with a double-acting pneumatic cylinder assembly. When the double-acting pneumatic cylinder is turned on, the upper and lower assemblies will be engaged together and generate a self-lock effect for safety; when the double-acting pneumatic cylinder is turned off, the two assemblies will be disengaged from each other.