Patents by Inventor Yu-Feng Chan
Yu-Feng Chan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7743691Abstract: A workpiece feeding stopper for use in a stable saw to prevent careless feed of a workpiece having a height greater than a cutting depth of a circular saw blade includes a support arm having a rear end adapted for connection with a spreader of the table saw. A stop member is provided at a front end of the support arm and has a stop face with a bottom edge adapted for being spaced above from a worktable of the table saw by a distance slightly greater than or equal to a cutting depth of the circular saw blade and smaller than a distance between a pivot where a blade guard of the table saw and the spreader are pivotally connected to and the worktable, thereby enabling the workpiece to be completely cut without being stopped by the pivot.Type: GrantFiled: August 16, 2007Date of Patent: June 29, 2010Assignee: Durq Machinery Corp.Inventors: Chia-Sheng Liu, Yu-Feng Chan
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Publication number: 20090266213Abstract: A splitting knife adjustment structure used in a table saw for adjusting alignment of a splitting knife with the cutting direction of the saw blade of the table saw is disclosed to include a mounting plate member, an adjustment member supported on the mounting plate member to hold a splitting knife and movable relative to the mounting plate member along an arched path.Type: ApplicationFiled: April 29, 2009Publication date: October 29, 2009Applicant: DURQ MACHINERY CORP.Inventors: Chia-Sheng LIU, Yu-Feng Chan
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Patent number: 7546791Abstract: A saw blade lifting mechanism for a sawing machine includes a fixed table having a bottom transverse rod, a bracket pivoted to, a support member fastened to the transverse rod and provided with a sliding slot, a swinging member pivoted to the bracket and turnable backwards and forwards, a motor fixedly fastened to the swinging member and provided with an output shaft fastened with a saw blade, a first connecting member pivoted to the bracket, a second connecting member pivotally coupled between the first connecting member and the motor, a knife member affixed to the second connecting member, and a guide member affixed to the second connecting member and moveably inserted into the sliding slot of the supporting member such that when the swinging member is turned backwards or forwards the saw blade and the knife member can be synchronously lifted up or lowered down.Type: GrantFiled: July 10, 2006Date of Patent: June 16, 2009Assignee: Durg Machinery Corp.Inventors: Chia-Sheng Liu, Yu-Feng Chan
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Patent number: 7546792Abstract: A quick release structure for use in the saw blade guard assembly of a table saw is disclosed to include a mounting member affixed to the base of the table saw, a coupling block detachably attached to the mounting member to hold a pivoted attachment member, for example, a saw blade guard, and a rotary locking member mounted in the coupling block and rotatable relative the coupling block between two positions to lock the coupling block to the mounting member or to release the coupling block.Type: GrantFiled: March 22, 2007Date of Patent: June 16, 2009Assignee: Durq Machinery Corp.Inventors: Chia-Sheng Liu, Yu-Feng Chan
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Publication number: 20090044673Abstract: A workpiece feeding stopper for use in a stable saw to prevent careless feed of a workpiece having a height greater than a cutting depth of a circular saw blade includes a support arm having a rear end adapted for connection with a spreader of the table saw. A stop member is provided at a front end of the support arm and has a stop face with a bottom edge adapted for being spaced above from a worktable of the table saw by a distance slightly greater than or equal to a cutting depth of the circular saw blade and smaller than a distance between a pivot where a blade guard of the table saw and the spreader are pivotally connected to and the worktable, thereby enabling the workpiece to be completely cut without being stopped by the pivot.Type: ApplicationFiled: August 16, 2007Publication date: February 19, 2009Inventors: Chia-Sheng LIU, Yu-Feng CHAN
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Patent number: 7441487Abstract: A table saw includes two guide bars movable along two opposite sides of a worktable to carry a table extension, and a locking mechanism for locking the guide bars in position. The locking mechanism includes a handle pivoted to a coupling block at the bottom side of the worktable, two eccentric members reversely mounted in the handle, and two links respectively coupled between the eccentric members and the guide bars and movable with the handle to force a respective stop block against or to release the respective stop block from the guide bars to further lock or unlock the guide bars and the table extension.Type: GrantFiled: July 18, 2005Date of Patent: October 28, 2008Assignee: Durq Machinery Corp.Inventors: Chia-Sheng Liu, Yu-Feng Chan
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Publication number: 20080168875Abstract: A splitting knife adjustment structure used in a table saw for adjusting alignment of a splitting knife with the cutting direction of the saw blade of the table saw is disclosed to include a mounting plate member, an adjustment member movably supported on the mounting plate member to hold a splitting knife, and fastening rods inserted through elongated slots of the adjustment member and the mounting plate member and fastened up with a fixation plate to lock the adjustment member to the mounting plate member so as to fix the position of the splitting knife.Type: ApplicationFiled: May 29, 2007Publication date: July 17, 2008Applicant: Durq Machinery Corp.Inventors: Chia-Sheng Liu, Yu-Feng Chan
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Publication number: 20080121080Abstract: A quick release structure for use in the saw blade guard assembly of a table saw is disclosed to include a mounting member affixed to the base of the table saw, a coupling block detachably attached to the mounting member to hold a pivoted attachment member, for example, a saw blade guard, and a rotary locking member mounted in the coupling block and rotatable relative the coupling block between two positions to lock the coupling block to the mounting member or to release the coupling block.Type: ApplicationFiled: March 22, 2007Publication date: May 29, 2008Applicant: Durq Machinery Corp.Inventors: Chia-Sheng Liu, Yu-Feng Chan
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Patent number: 7320270Abstract: A table saw includes a table, a saw unit coupled to a substantially inverted U-shaped suspension girder, two supporting devices fixedly fastened to the bottom side of the table to support the suspension girder, and two sliding blocks respectively fastened to the two ends of the suspension girder and respectively coupled to a respective arched guide slot in each of the supporting devices to guide movement of the suspension girder along an arched track to keep the cutting reference point of the saw blade in position so that the saw blade can cut the workpiece accurately.Type: GrantFiled: May 25, 2005Date of Patent: January 22, 2008Assignee: Durq Machinery Corp.Inventors: Chia-Sheng Liu, Yu-Feng Chan
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Publication number: 20070227327Abstract: A saw blade lifting mechanism for a sawing machine includes a fixed table having a bottom transverse rod, a bracket pivoted to, a support member fastened to the transverse rod and provided with a sliding slot, a swinging member pivoted to the bracket and turnable backwards and forwards, a motor fixedly fastened to the swinging member and provided with an output shaft fastened with a saw blade, a first connecting member pivoted to the bracket, a second connecting member pivotally coupled between the first connecting member and the motor, a knife member affixed to the second connecting member, and a guide member affixed to the second connecting member and moveably inserted into the sliding slot of the supporting member such that when the swinging member is turned backwards or forwards the saw blade and the knife member can be synchronously lifted up or lowered down.Type: ApplicationFiled: July 10, 2006Publication date: October 4, 2007Applicant: DURQ MACHINERY CORP.Inventors: Chia-Sheng Liu, Yu-Feng Chan
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Publication number: 20070214929Abstract: A sawing machine includes a base and four legs. The legs are connected to a bottom of the base, each of which has a first tube and a second tube, wherein the first tubes are connected to corners of the bottom of the base and the second tubes are detachably connected to the first tube respectively. The base has a storage space to receive the disassembled second tube.Type: ApplicationFiled: April 24, 2006Publication date: September 20, 2007Applicant: DURQ MACHINERY CORP.Inventors: Chia-Sheng Liu, Yu-Feng Chan
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Publication number: 20060266181Abstract: A table saw includes two guide bars movable along two opposite sides of a worktable to carry a table extension, and a locking mechanism for locking the guide bars in position. The locking mechanism includes a handle pivoted to a coupling block at the bottom side of the worktable, two eccentric members reversely mounted in the handle, and two links respectively coupled between the eccentric members and the guide bars and movable with the handle to force a respective stop block against or to release the respective stop block from the guide bars to further lock or unlock the guide bars and the table extension.Type: ApplicationFiled: July 18, 2005Publication date: November 30, 2006Applicant: DURQ MACHINERY CORP.Inventors: Chia-Sheng Liu, Yu-Feng Chan
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Publication number: 20060236835Abstract: A table saw includes a table, a saw unit coupled to a substantially inverted U-shaped suspension girder, two supporting devices fixedly fastened to the bottom side of the table to support the suspension girder, and two sliding blocks respectively fastened to the two ends of the suspension girder and respectively coupled to a respective arched guide slot in each of the supporting devices to guide movement of the suspension girder along an arched track to keep the cutting reference point of the saw blade in position so that the saw blade can cut the workpiece accurately.Type: ApplicationFiled: May 25, 2005Publication date: October 26, 2006Applicant: DURQ MACHINERY CORP.Inventors: Chia-Sheng Liu, Yu-Feng Chan
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Patent number: D532802Type: GrantFiled: April 18, 2006Date of Patent: November 28, 2006Assignee: DURQ Machinery Corp.Inventors: Chia-Sheng Liu, Yu-Feng Chan
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Patent number: D537853Type: GrantFiled: May 4, 2005Date of Patent: March 6, 2007Assignee: Durq Machinery Corp.Inventors: Chia-Sheng Liu, Yu-Feng Chan