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公开(公告)号：US11091712B1
公开(公告)日：2021-08-17
申请号：US16819162
申请日：2020-03-15
Applicant: Chin-Chang Chen
Inventor： Chin-Chang Chen , Jia-Hao Lin
Abstract: A method for producing biodiesel and triacetin includes steps as follows. A bio-oil source is provided; the bio-oil source is palm oil acid or palm oil sludge. A bio-oil source pretreatment step is performed, wherein the bio-oil source is mixed with ash to decolor. A pre-esterification step is performed, wherein methanol and a pre-esterification catalyst are mixed, so as to form an organic phase solution and an aqueous phase solution. A transesterification step is performed, wherein the methanol and a lithium silicate catalyst are mixed, so as to form a crude biodiesel phase solution and a crude glycerol phase solution. A washing step is performed, wherein purified biodiesel is collected. A glycerol separating step is performed, wherein purified glycerol is collected. A glycerol esterification step is performed, wherein triacetin is collected.
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公开(公告)号：US20210199182A1
公开(公告)日：2021-07-01
申请号：US16726893
申请日：2019-12-25
Applicant: Chin-Chin Chang
Inventor： Chin-Chin Chang
Abstract: A device for adjusting tautness of a belt of a motor of a table saw is provided with an adjustment screw, and a pivot. In response to unfastening the adjustment screw, the motor counterclockwise rotates about the pivot to tighten the belt until predetermined tautness is obtained. The adjustment screw fastens to keep the belt at the predetermined tautness. Alternatively, the motor clockwise rotates about the pivot to loosen the belt.
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公开(公告)号：US20210197299A1
公开(公告)日：2021-07-01
申请号：US16726894
申请日：2019-12-25
Applicant: Chin-Chin Chang
Inventor： Chin-Chin Chang
Abstract: A table saw includes a base assembly; a table assembly mounted on the base assembly and comprising a table and a circular saw blade; a rip fence assembly moveably disposed on one end of the table assembly; and a slide mechanism mounted on the table assembly and including front and rear tracks affixed to front end rear ends of the table respectively; front and rear slides each having one end secured to either end of the rip fence assembly and the other end being open wherein the front and rear slides are moveably mounted on the front and rear tracks respectively; and first, second, third, fourth, and fifth rollers disposed in each of the front and rear tracks. The first, second, fourth, and fifth rollers are at an elevation higher than that of the third roller.
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公开(公告)号：US20210170508A1
公开(公告)日：2021-06-10
申请号：US16708890
申请日：2019-12-10
Applicant: Chin-Chin Chang
Inventor： Chin-Chin Chang
IPC: B23D47/02
Abstract: A scale assembly of a table saw includes front and rear outer slide members disposed at front and rear ends of a slide mechanism respectively; front and rear inner slide members disposed at front and rear ends of a table assembly respectively wherein the front inner slide member slides in the front outer slide member, and the rear inner slide member slides in the rear outer slide member; a block member secured to a front end of a rip fence assembly and including a channel and a spring biased member; and a lever in the channel and including an exposed trigger, a projection, and first and second recesses. In a locked position, the spring biased member has one end entered the first recess and the projection enters a lengthwise cavity on an outer surface of the front outer slide member.
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公开(公告)号：US10758990B1
公开(公告)日：2020-09-01
申请号：US16435507
申请日：2019-06-09
Applicant: Chin-Chin Chang
Inventor： Chin-Chin Chang
Abstract: A scale assembly of a table saw includes a first positioning pin of white, a second positioning pin of black, and a third positioning pin of yellow disposed on the first slide strip of a slide mechanism; a first scale of white disposed on a top of the first slide strip; a second scale of black and a third scale of yellow disposed on a top of the first track respectively; a first pointer disposed on one end of the top of the first track and forwardly pointing to the first scale of white of the first slide strip; and a second pointer disposed on the other end of the top of the first slide strip and rearward pointing to both the second scale of black and the third scale. The scale is visible in a cutting operation.
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Patent Agency Ranking
公开(公告)号：US10717205B1
公开(公告)日：2020-07-21
申请号：US16298417
申请日：2019-03-11
Applicant: Chin-Chin Chang
Inventor： Chin-Chin Chang
Abstract: A table saw includes a slide mechanism on a table assembly and including a knob, front and rear roller pinions, two slides slidably secured to front and rear ends of the table respectively, each slide having a bottom rack engaging the roller pinion, a groove on an outer surface, and projections projecting out of the groove, front and rear mounting members secured to the table, and an axle; and a rip fence assembly on either side of the table assembly and including front and rear arms each having a cavity for releasably securing to one projection, a rip fence between the arms, front and rear risers respectively for fastening either end of the rip fence and either one of the front and rear arms, and two levers on the arms respectively, each lever including an upper pivot, an intermediate urging protuberance, and a lower protrusion.
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公开(公告)号：US20200180087A1
公开(公告)日：2020-06-11
申请号：US16435505
申请日：2019-06-09
Applicant: Chin-Chin Chang
Inventor： Chin-Chin Chang
Abstract: A fence assembly of a table saw includes rear and front sliding members on two rails of a table respectively, the rear sliding member having three top projections, the front sliding member having three forward projections, a transverse member interconnecting the sliding members, and a spring biased workpiece guide bar on the transverse member. The workpiece guide bar includes a front locking element for locking the front sliding member, a rear locking element for locking the rear sliding member, the rear locking element having a recess for receipt of the top projection, and a spring biased lever pivotably secured to a front end of the workpiece guide bar. A latch of the lever can be engaged with a protuberance of the front locking element to lock the front locking element or disengaged from the protuberance to unlock same. The lever includes a wedge for locking the front sliding member.
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公开(公告)号：US10322459B1
公开(公告)日：2019-06-18
申请号：US15927356
申请日：2018-03-21
Applicant: Chin-Chin Chang
Inventor： Chin-Chin Chang
Abstract: A power miter saw is provided with a base including positioning apertures; a table rotatably mounted on the base and including an arm projecting forward; a saw blade and motor mechanism configured to rotate a circular saw blade thereof; a pivotal positioning seat interconnecting two linear guide mechanisms and a support seat at a rear end of the base; a connecting seat interconnecting the linear guide mechanisms to the saw blade and motor mechanism; a locking device; and a positioning device. Knob rotation and button pressing may adjust a rotational position of the table.
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公开(公告)号：US20190164379A1
公开(公告)日：2019-05-30
申请号：US16262831
申请日：2019-01-30
Applicant: Ti Chin Chang , Tong Tsan Chien , Chia Ling Hsieh , Yao Ling Chang
Inventor： Ti Chin Chang , Tong Tsan Chien , Chia Ling Hsieh , Yao Ling Chang
IPC: G07F11/58
Abstract: A crane or hanger-type cargo lane device includes two parallel half housings, a chain mounting assembly, a roller chain assembly, a link, and a drive mechanism. The half housing includes a main plate, bent extensions on top, and a slit. The chain mounting assembly is between the main plates and includes two parallel frames, limit members each in the frame and having a slot, and a shuttle member between slots and having a bottom pawl. The roller chain assembly is between one set of the frame and the limit member and the other set of the frame and the limit member. The roller chain assembly includes two sets of plate members each having a top tooth and a bottom hook; and rollers each driven through the plate members of two sets. The bifurcated link is secured to the shuttle member through the slits. The drive mechanism rotates the link.
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公开(公告)号：USD848555S1
公开(公告)日：2019-05-14
申请号：US29611663
申请日：2017-07-24
Applicant: Hui-Chin Chang
Designer： Hui-Chin Chang
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