Abstract: A funnel having a stopper valve member for delivering a flowable material to a vessel. The funnel has an upper open bowl and a lower delivery tube having a fluid outlet. The valve member is arranged to move from an upper position inserted into the fluid outlet for stopping flow through said funnel to a position out of the tube outlet to permit generally unimpeded flow. Curved shoulders are provided within the bowl to induce a vortex flow on the material received by the funnel. The stopper valve is mounted on a resiliently mounted rod capable of being manually flexed downward and upward to move the stopper valve.

Abstract: A system and method for efficiently and accurately determining grating profiles uses characteristic signature matching in a discrepancy enhanced library generation process. Using light scattering theory, a series of scattering signatures vs. scattering angles or wavelengths are generated based on the designed grating parameters, for example. CD, thickness and Line:Space ratio. This method selects characteristic portions of the signatures wherever their discrepancy exceeds the preset criteria and reforms a characteristic signature library for quick and accurate matching. A rigorous coupled wave theory can be used to generate a diffraction library including a plurality of simulated diffraction spectrums based on a predetermined structural parameter of the grating. The characteristic region of the plurality of simulated diffraction spectrums is determined based on if the root mean square error of the plurality of simulated diffraction spectrums is larger than a noise level of a measuring machine.

Abstract: The safety receptacle is used with an intravenous drip assembly having an intravenous drip, a needle and a tip protector and has a front bracket, a connecting bracket, a rear bracket, at least one C-clip and two clipping sheets. The C-clip is formed on the front bracket to hold the intravenous drip. The clipping sheets are mounted pivotally between the front and rear brackets. The needle can be held in and removed out from the tip protector. The tip protector can be held in the safety receptacle by the clipping sheets. When the clipping sheets are pivoted, the tip protector is released and can be removed from the safety receptacle.

Abstract: A method of image processing, the method comprising receiving an image frame including a plurality of pixels, each of the plurality of pixels including an image information, conducting a first extraction based on the image information to identify foreground pixels related to a foreground object in the image frame and background pixels related to a background of the image frame, scanning the image frame in regions, identifying whether each of the regions includes a sufficient number of foreground pixels, identifying whether each of regions including a sufficient number of foreground pixels includes a foreground object, clustering regions including a foreground object into at least one group, each of the at least one group corresponding to a different foreground object in the image frame, and conducting a second extraction for each of at least one group to identify whether a foreground pixel in the each of the at least one group is to be converted to a background pixel.

Abstract: A safety syringe for taking blood has a hollow barrel having a bottom open end, a top end, a rectangular hole defined in the top end to have two opposite long sides and two opposite short sides, a needle hub detachably connected between the two opposite short sides of the rectangular hole and having a first needle extending from an elliptical body into an interior of the hollow barrel and a second needle extending away from the hollow barrel, a cap rotatably connected to the top end of the hollow barrel and having a notch defined through a periphery of the cap to receive therein the elliptical body so that the second needle extends out of the cap after in combination with the cap and an enclosure detachably enclosing the second needle for protection.

Abstract: A method for designing a grating comprises steps of (a1) generating a first diffraction spectrum based on calculation values of a plurality of structural parameters, (a2) calculating a first difference value between the first diffraction spectrum and a first nominal spectrum, (a3) setting a default difference value with the first difference value and default structural parameter values with the structural parameter values, (b1) changing one of the structural parameter values to generate a second diffraction spectrum, (b2) calculating a second difference value between the second diffraction spectrum and a second nominal spectrum, and (c) comparing the default difference value and the second difference value, updating a default difference value with the smaller one, and updating the default structural parameter values with the structural parameter values corresponding to the smaller one.

Abstract: A turbine for dental burr handpiece includes a turbine main body having an axial central bore with a pivot shaft fixedly connected thereto, and multiple circles of blade sets surrounding the main body. The blades on two adjacent blade sets are staggered in arrangement. For guiding air, each blade in each of the blade sets is provided at a radially inner end adjacent to a radially outer end of a preceding blade with an air guiding slot, and two axially outmost blade sets are provided between respective axial outer side and a corresponding outer end of the central bore with an annular recess. High-pressure air introduced into the dental burr handpiece sequentially strikes against the blades on the multiple circles of blade sets to thereby quickly, smoothly, and stably rotate the pivot shaft at high speed without causing high wind resistance and turbulence, or noise due to vibration.

Abstract: A safety syringe for taking blood has a hollow barrel having a bottom open end, a top end, a rectangular hole defined in the top end to have two opposite long sides and two opposite short sides, a needle hub detachably connected between the two opposite short sides of the rectangular hole and having a first needle extending from an elliptical body into an interior of the hollow barrel and a second needle extending away from the hollow barrel, a cap rotatably connected to the top end of the hollow barrel and having a notch defined through a periphery of the cap to receive therein the elliptical body so that the second needle extends out of the cap after in combination with the cap and an enclosure detachably enclose the second needle for protection.

Abstract: A safety syringe for taking blood has a hollow barrel having a bottom open end, a top end, a needle hub movably received between the cap and the stop of the barrel and a spring urging against the needle hub to move into the barrel after the cap is rotated to force second sectorial portions of the moving block of the needle block misalign with the first sectorial portions of the stop of the barrel so that the needle hub is received inside the barrel.

Abstract: A safety container for a scalp vein needle has a base, a cap and a covering sheet. The base has an inlet, an outlet and a recess communicating with the inlet and the outlet. The cap connects to and selectively covers the base and has a corresponding inlet, a corresponding outlet, a corresponding recess and a through hole aligning with the outlet. The covering sheet connects to and selectively covers the cap and has two stops selectively extending into the through hole in the cap. The scalp vein needle assembly has a feeding tube, a flange and a scalp vein needle. The feeding tube is mounted in the recesses and is selectively held by the stops on the cap or is slidable in the recesses.

Abstract: The safety receptacle is used with an intravenous drip assembly having an intravenous drip, a needle and a tip protector and has a front bracket, a connecting bracket, a rear bracket, at least one C-clip and two clipping sheets. The C-clip is formed on the front bracket to hold the intravenous drip. The clipping sheets are mounted pivotally between the front and rear brackets. The needle can be held in and removed out from the tip protector. The tip protector can be held in the safety receptacle by the clipping sheets. When the clipping sheets are pivoted, the tip protector is released and can be removed from the safety receptacle.

Abstract: A captive cover for a hypodermic needle of an IV tube assembly has an elongated body connected to an element of the IV tube assembly. The elongated body is hollow and has a proximal opening, a closed distal end, a chamber, at least one locking tab and one or more optional connectors. The hypodermic needle of the IV tube assembly can be inserted through the proximal opening into the chamber. A flange on the hypodermic needle of the IV tube assembly is held in the captive cover by the locking tab. Since the hypodermic needle of the IV tube assembly only passes through the locking tab of the elongated body, the hypodermic needle of the IV tube assembly can be conveniently inserted into the elongated body. The captive cover can accommodate an ordinary hypodermic needle and has a simple structure.

Abstract: A safety syringe has a hollow barrel, a plunger, a connector, a plug and a needle hub. The plunger has a protrusion extended from the plunger and along a longitudinal axis of the plunger. The connector is mounted around the protrusion of the plunger. Multiple limit stubs and multiple curved limit channels communicating with a corresponding notch with an inclined side-wall are respectively formed on the connector and a connecting chamber in a connecting tube of the needle hub. When the plunger is being pushed towards the needle hub, the multiple limit stubs respectively pass through the corresponding curved limit channel and are contained in the corresponding notch. The inclined side-wall of the notch will stably connect the limit stub so the plunger can stably retract the needle hub in the hollow barrel.

Abstract: A safety syringe has a hollow barrel, a plunger, a connector, a plug and a needle hub. The plunger includes a socket to mount the connector. The connector has a needle connector protruded from the connector to connect with the needle hub. When the plunger is pushed toward the needle hub the first time, the needle hub of the connector is hidden in the socket and the plunger can not connect with the needle hub. When the plunger is pulled back and the syringe is full of medical solution, the needle hub of the connector protrudes from the socket. Pushing the plunger again toward the needle hub can connect the plunger and the needle hub together and the needle hub can retract back in the hollow barrel.

Abstract: A safety syringe has a hollow barrel, a needle hub and a plunger. The hollow barrel has a distal end, a proximal end, a cone-shaped end formed on the proximal end with an opening. The plunger has a proximal end and a needle retractor formed on the proximal end. The needle hub with a needle is detachably mounted inside the proximal end of the hollow barrel and has an axial fitting to engage the plunger. When the safety syringe is used, the plunger connects to the needle hub and is pulled toward the distal end of the hollow barrel to draw the needle hub with the needle inside the hollow barrel to keep people from being hurt or infected by an exposed needle.

Abstract: A syringe safety sleeve has an inner sleeve and an outer sleeve. The inner sleeve selectively attaches to a conventional syringe and is slidably mounted inside the outer sleeve. The outer sleeve has an open proximal end and an open distal end. The inner sleeve has an open proximal end, an open distal end and a barrel connector formed on the open distal end. The open proximal end of the outer sleeve is selectively connected to the open proximal end of the inner sleeve when the outer sleeve is pull out from the inner sleeve. The barrel connector of the inner sleeve attaches to a conventional syringe. The syringe safety sleeve can accommodate ordinary syringes with no safety device to protect the used needle. The syringe safety sleeve can be conveniently connected to the syringe and has a simple structure.

Abstract: A captive cover for a hypodermic needle of an IV tube assembly has an elongated body connected to an element of the IV tube assembly. The elongated body is hollow and has a proximal opening, a closed distal end, a chamber, at least one locking tab and one or more optional connectors. The hypodermic needle of the IV tube assembly can be inserted through the proximal opening into the chamber. A flange on the hypodermic needle of the IV tube assembly is held in the captive cover by the locking tab. Since the hypodermic needle of the IV tube assembly only passes through the locking tab of the elongated body, the hypodermic needle of the IV tube assembly can be conveniently inserted into the elongated body. The captive cover can accommodate an ordinary hypodermic needle and has a simple structure.

Abstract: A safety syringe has a hollow barrel, a seal, a needle hub and a plunger. The plunger is mounted in the hollow barrel and has a needle retractor at one end. The seal has an axial circular through hole that is mounted around the plunger and has multiple detents. The hollow barrel has an inside surface and the seal has an outside surface, which correspond to each other and are non-circular. The plunger has detent protrusions corresponding to the detents in the seal to selectively hold the plunger is position. The needle hub with a needle is detachably mounted inside the hollow barrel and has an axial locking opening to engage the plunger. Since the plunger will not accidentally rotate, the protruding head on the plunger can be inserted precisely into the locking chamber of the needle hub and either engage or be withdrawn from the axial locking opening.

Abstract: A safety syringe has a hollow barrel, a needle hub and a plunger. The hollow barrel has a distal end, a proximal end, a cone-shaped end formed on the proximal end with an opening. The plunger has a proximal end and a needle retractor formed on the proximal end. The needle hub with a needle is detachably mounted inside the proximal end of the hollow barrel and has an axial fitting to engage the plunger. When the safety syringe is used, the plunger connects to the needle hub and is pulled toward the distal end of the hollow barrel to draw the needle hub with the needle inside the hollow barrel to keep people from being hurt or infected by an exposed needle.

Abstract: A safety syringe has a hollow barrel, a plunger, a connector, a plug and a needle hub. The plunger includes a socket to mount the connector. The connector has a needle connector protruded from the connector to connect with the needle hub. When the plunger is pushed toward the needle hub the first time, the needle hub of the connector is hidden in the socket and the plunger can not connect with the needle hub. When the plunger is pulled back and the syringe is full of medical solution, the needle hub of the connector protrudes from the socket. Pushing the plunger again toward the needle hub can connect the plunger and the needle hub together and the needle hub can retract back in the hollow barrel.