Tung-Han
Tung-Han Chuang, Yunlin TW
Patent application number | Description | Published |
---|---|---|
20130323530 | ACTIVE SOLDER - An active solder is revealed. The active solder includes an active material and a metal substrate. There are two kinds of active materials, titanium together with rare earth elements and magnesium. The metal substrate is composed of a main component and an additive. The main component is tin-zinc alloy and the additive is selected from bismuth, indium, silver, copper or their combinations. The active solder enables targets and backing plates to be joined with each other directly in the atmosphere. The target is ceramic or aluminum with low wetting properties. The bonding temperature of the active solder ranges from 150° C. to 200° C. so that the problem of thermal stress can be avoided. | 12-05-2013 |
Tung-Han Shih, Tali TW
Patent application number | Description | Published |
---|---|---|
20080313847 | Dust absorption head of a vacuum cleaner - A dust absorption head of a vacuum cleaner including a main socket tube, a mounting cap, a vane wheel, a partition sleeve, and a dust absorption brush wheel to serve for attachment to a dust absorption pipe of a vacuum cleaner and for a rotational dust-absorption operation. The main socket tube and the mounting cap include at corresponding places an engaging projection and a plurality of positioning holes, allowing for adjustment of the operation angle of the dust absorption head according to different requirements. Meanwhile, a natural rotation of the vane wheel in response to the suction airflow of a vacuum cleaner is ensured for bringing the dust absorption brush wheel into rotation, thereby efficiently enhancing the dust-absorption effect. | 12-25-2008 |
20100123305 | TELESCOPIC COUPLING TUBE FOR A VACUUM CLEANER - A telescopic coupling tube for a vacuum cleaner includes a mounting tube, a connecting sleeve, a sealing sleeve, a telescopic tube, a locking assembly, and a positioning cap. The connecting sleeve is provided for the insertion of the telescopic tube. A guide slot and toothed engaging holes are formed in the telescopic tube. Based upon the interaction of the above-mentioned components, an easy adjustment of the assembly length is achieved. | 05-20-2010 |
Tung-Han Tsai, Taipei City TW
Patent application number | Description | Published |
---|---|---|
20110077429 | METHOD AND CATALYST COMPOSITION FOR PREPARING AMIDE - The present invention provides a catalyst composition for preparing an amide, including an amino acid ionic liquid having a cation of formula (I) | 03-31-2011 |
20120184733 | CATALYST COMPOSITION AND METHOD FOR PREPARING AMIDE USING THE SAME - The present invention provides a method for preparing an amide. The method includes the steps of performing in a reactor including a catalyst composition having a nitrogen-containing heterocyclic compound and sulfuric acid Beckman rearrangement of a ketoxime to form a product stream having the amide, wherein a molar ratio of the nitrogen-containing heterocyclic compound to the sulfuric acid is from 1:1 to 1:8; and separating an organic phase having the amide and an aqueous phase having the catalyst composition from the product stream. The present invention facilitates the regeneration of the catalyst composition with low water content, so as to increase the conversion rate of a ketoxime and the selectivity of an amide. | 07-19-2012 |
20130053575 | CATALYST COMPOSITION AND METHOD FOR PREPARING AMIDE - The present invention provides a catalyst composition and a method for preparing an amide. The catalyst composition of the present invention including a hydroxylamine salt, sulfuric acid, and a nitrogen-containing heterocyclic compound is used for catalyzing a ketoxime to form an amide in the Beckman rearrangement reaction. The preparation of an amide by using the catalyst composition of the present invention has high conversion rate of a ketoxime, high selectivity of an amide and high tolerance to water. | 02-28-2013 |
Tung-Han Tsai, Taipei TW
Patent application number | Description | Published |
---|---|---|
20100063274 | METHOD FOR PREPARING AMIDE - The present invention provides a method for preparing amides, in which an amino acid ionic liquid is used as both a reaction medium and a catalyst to catalyze Beckman rearrangement of a ketoxime, so as to produce an amide. In the method, the rearrangement is conducted by catalyzing a ketoxime with an amino acid ionic liquid having the asymmetric property at a moderate reaction temperature during a short reaction time, so as to produce an amide without adding other catalysts such as concentrate sulfuric acid. The method has advantages such as avoiding corrosion in equipments with pipelines, the high conversion rate of ketoximes and the high selectivity of amides. | 03-11-2010 |
Tung-Han Tsai, Tainan City TW
Patent application number | Description | Published |
---|---|---|
20130128395 | Short-circuit Detection Circuit and Short-circuit Detection Method - The present invention discloses a short-circuit detection circuit and a short-circuit detection method. The short-circuit detection circuit detects whether an output node is short-circuited to a first predetermined level. A first switch circuit which is controlled by a control signal is coupled between the output node and a second predetermined level. The short-circuit detection circuit includes: a determination circuit, which is coupled between the output node and the second predetermined level, wherein when the determination circuit is enabled, it generates a determination signal according to whether the output node is short-circuited to the first predetermined level; and a second switch circuit, which generates a short-circuit detection signal according to the determination signal. | 05-23-2013 |