Patents by Inventor Lung-Tsai Chang
Lung-Tsai Chang 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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Publication number: 20060140807Abstract: A scroll-type compressor assembly means has one or multiple positioning holes provided on a positioning post of the frame, and a positioning element to fix a retaining spacer to the frame for the retaining spacer to limit the stationary scroll and to define an ideal spacing between the positioning post and the stationary scroll; the ideal spacing not affected by the locking location of the positioning element to the positioning post that is far away from the ideal spacing or the stationery scroll for assurance of assembly quality of the compressor and prevention of operation noise or frustrated operation due to unpredictable change or narrowed ideal spacing between the positioning post and stationary scroll because that the positioning post is deformed.Type: ApplicationFiled: December 29, 2004Publication date: June 29, 2006Inventors: Lung-Tsai Chang, Chung-Pen Chiu, Bien - De Shen
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Patent number: 7029251Abstract: A backpressure mechanism for a scroll type compressor to effectively prevent leakage of coolant; a recessed seat being provided at the top of a coolant passage at the center of a fixed scroll; a ring groove being disposed on the outer circumference of the recessed seat; a high-pressure sealing assembly comprised of a high-pressure ring, a sealing device and a high pressure ring seat and a medium-pressure sealing assembly comprised of a medium-pressure ring, a sealing device and a medium-pressure ring seat being respectively provided to the recessed seat and the ring groove; pressure from the compressed coolant causing an axially compromising vacuum unloading function to float the both sealing assemblies.Type: GrantFiled: May 28, 2004Date of Patent: April 18, 2006Assignee: Rechi Precision Co., Ltd.Inventors: Lung-Tsai Chang, Chung-Pen Chiu
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Publication number: 20050265880Abstract: A backpressure mechanism for a scroll type compressor to effectively prevent leakage of coolant; a recessed seat being provided at the top of a coolant passage at the center of a fixed scroll; a ring groove being disposed on the outer circumference of the recessed seat; a high-pressure sealing assembly comprised of a high-pressure ring, a sealing device and a high pressure ring seat and a medium-pressure sealing assembly comprised of a medium-pressure ring, a sealing device and a medium-pressure ring seat being respectively provided to the recessed seat and the ring groove; pressure from the compressed coolant causing an axially compromising vacuum unloading function to float the both sealing assemblies.Type: ApplicationFiled: May 28, 2004Publication date: December 1, 2005Inventors: Lung-Tsai Chang, Chung-Pen Chiu
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Patent number: 6848893Abstract: A compressor check valve having a valve bolt and a valve bolt cover for noise reduction and mitigation of impact from a valve bolt on the valve bolt cover. A bolt insertion hole is provided in the cover to receive the valve bolt. A pressure conduction hole penetrating from the side of the valve bolt insertion hole of the cover through the exterior of the cover is provided on the cover to connect the high pressure chamber through the valve bolt insertion hole. A buffer section is formed on a top of the valve bolt insertion hole so that the valve bolt is forced by a high pressure coolant to move above and block the pressure conduction hole, the buffer section contains high pressure coolant prevented from being discharged through the pressure conduction hole to create a buffer action when the valve bolt moves upward so as to avoid direct impact against the valve bolt cover.Type: GrantFiled: January 15, 2003Date of Patent: February 1, 2005Assignee: Rechi Precision Co., Ltd.Inventors: Guang-Der Tarng, Lung-Tsai Chang
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Publication number: 20050019194Abstract: An improved pumping structure of a scroll compressor having multiple positioning seats fixed to the block at where in relation to the circumference of a fixed scroll, and a suppressor being fixed at the top of the positioning seat to secure the fixed scroll to the block; an Oldham ring being provided between an orbiting scroll and the block for the limiting part of the Oldham ring to limit the operation direction of the orbiting scroll is characterized by that the positioning base being fixed to the block with a stand ring, and the stand ring being coupled to the block after the block is fixed where inside the casing to minimize the impacts upon the assembly precision of the positioning seat and the fixed scroll due to deformation of the mechanical structure in the assembly process of the block and casing.Type: ApplicationFiled: July 25, 2003Publication date: January 27, 2005Inventors: Guang-Der Tarng, Lung-Tsai Chang, Mu-Ching Yeh
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Patent number: 6814554Abstract: An improved structure of vortex compressor provided with at least one threaded hole to the positioning pillar of a frame, a retainer packing locked with the screw to the frame to define an ideal spacing between the pillar and a vortex seat, and the ideal spacing being limited in position by the packing to restrict the vortex seat characterized by a deformation spacing slightly larger than the diameter of that of the prior art being provided to the threaded hole on the inner edge at the end receiving the screw to absorb squeezing produced by placement of the screw for quality assurance of the assembly of the vortex seat while eliminating the flaws of narrowing spacing of revolution between deformed positioning pillar and vortex seat or operation noise and awkward operation due to unpredictable change.Type: GrantFiled: June 4, 2003Date of Patent: November 9, 2004Assignee: Rechi Precision Co., Ltd.Inventors: Lung-Tsai Chang, Guang-Der Tarng
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Publication number: 20040208767Abstract: An improvement of a ring for a scroll compressor by forming a gap at an angle on the top of the ring where is less subject to pressure, and an askew tangent plane descending outwardly from the bottom of the gap to allow the lubricant passing through the gap and flowing along the askew plane into the spacing between the ring and the circulating scroll to maintain consistent lubrication among the ring, the eccentric rod and the circulating scroll when the ring floats up to the top to hold against the body of the circulating scroll.Type: ApplicationFiled: April 18, 2003Publication date: October 21, 2004Applicant: RECHI PRECISION CO., LTD.Inventors: Lung-Tsai Chang, Guang-Der Tarng
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Patent number: 6796779Abstract: An improvement of a ring for a scroll compressor by forming a gap at an angle on the top of the ring where is less subject to pressure, and an askew tangent plane descending outwardly from the bottom of the gap to allow the lubricant passing through the gap and flowing along the askew plane into the spacing between the ring and the circulating scroll to maintain consistent lubrication among the ring, the eccentric rod and the circulating scroll when the ring floats up to the top to hold against the body of the circulating scroll.Type: GrantFiled: April 18, 2003Date of Patent: September 28, 2004Assignee: Rechi Precision Co., Ltd.Inventors: Lung-Tsai Chang, Guang-Der Tarng
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Publication number: 20040136851Abstract: A compressor check valve comprised of a valve bolt and a valve bolt cover for noise reduction and mitigation of impact from the valve bolt on the valve bolt cover to extend the service life of the check valve; wherein, a bolt insertion hole is provided to the cover to receive insertion of the valve bolt; a pressure conduction hole penetrating from the side of the valve bolt insertion hole of the cover through the exterior of the cover is provided on the cover to connect the high pressure chamber through the valve bolt insertion hole; and a buffer section is formed on the top of the valve bolt insertion hole so that when the valve bolt rises as plunged by the high pressure coolant up to the pressure conduction hole and blocked by the body of the valve bolt, the buffer section is filled up with high pressure coolant prevented from being discharged through the pressure conduction hole to create a buffer action against the rise of the valve bolt so to avoid direct impact against the valve bolt cover.Type: ApplicationFiled: January 15, 2003Publication date: July 15, 2004Applicant: RECHI PRECISION CO., LTD.Inventors: Guang-Der Tarng, Lung-Tsai Chang
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Patent number: 6739847Abstract: The present invention mainly includes a valve cock and a valve cock cover to form a structure of check valve, of which a trepan boring is set on the cover to accommodate the valve cock, and a pressure guide hole is set on the cover body to connect the high-pressure and valve cock trepan boring. A blast groove is set on the binding surface of the valve cock cover and shielding seat to release refrigerant. The valve cock is pressed against the vent hole of the shielding seat under the effect of the high-pressure chamber, and then the high-pressure refrigerant is blocked from flowing back into the low-pressure chamber. However, the high-pressure refrigerant will directly eject upward against the valve cock when the rotating turbine and fixed whirl run mutually, in addition the high-pressure refrigerant will flow into the high-pressure chamber via the blast groove.Type: GrantFiled: December 23, 2002Date of Patent: May 25, 2004Assignee: Rechi Precision Co., Ltd.Inventors: Guang-Der Tarng, Lung-Tsai Chang, Chung-Pen Chiu
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Patent number: 6672852Abstract: A lubricant filling device for a scroll compressor has provided a lubricant suction on the circulating scroll connecting through the side of the sleeve to the scroll space; a negative pressure suction being formed due to changed volume in the scroll chamber once the circulating scroll and the fixed scroll chamber are operating, so to directly suck the lubricant seeping through where between the eccentric rod and the sleeve to lubricate the circulating scroll and the fixed scroll chamber in time for improving the lubrication results for the compressor.Type: GrantFiled: April 18, 2003Date of Patent: January 6, 2004Assignee: Rechi Precision Co., Ltd.Inventors: Lung-Tsai Chang, Guang-Der Tarng, Chung-Pen Chiu
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Publication number: 20030095884Abstract: An improved structure for a fixed turbine assembly in a compressor by having provided in the inner edge of a fixation block vertically disposed on the housing, a corresponding second channel in the outer edge of the fixed turbine, and a retainer simultaneously inserted between both channels to restrain and form a link for the fixed turbine and the housing thus to secure the fixed turbine and present it from turning.Type: ApplicationFiled: November 19, 2001Publication date: May 22, 2003Inventors: Lung-Tsai Chang, Mu-Ching Yeh
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Patent number: 6565338Abstract: An improved structure for a fixed turbine assembly in a compressor by having provided in the inner edge of a fixation block vertically disposed on the housing, a corresponding second channel in the outer edge of the fixed turbine, and a retainer simultaneously inserted between both channels to restrain and form a link for the fixed turbine and the housing thus to secure the fixed turbine and present it from turning.Type: GrantFiled: November 19, 2001Date of Patent: May 20, 2003Assignee: Rechi Precision Co., Ltd.Inventors: Lung-Tsai Chang, Mu-Ching Yeh
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Patent number: 6537044Abstract: The present invention is related to a scroll compressor sealing unit structure, more particularly, a floating bearing and seal washer joined together so that the inverted edge of a slanting edge together form a slanting edge, and that a round cap together with a seal washer are fitted into the inverted edge of the floating bearing to form a single unit, and that the bottom edge of the rounded cap fit into the inverted and sloping edge of the floating bearing, so that the seal washer is able to act as a sealing unit in the space defined by this connection, and in this way ensure that in the fitting together of the round cap and seal washer a firm and fully sealed connection is effected.Type: GrantFiled: August 9, 2001Date of Patent: March 25, 2003Inventors: Lung-Tsai Chang, Guang-Der Tarng, Mao-Chuan Liu, Yeng-Chyi Liu
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Publication number: 20030031575Abstract: The present invention is related to a scroll compressor sealing unit structure, more particularly, a floating bearing and seal washer joined together so that the inverted edge of a slanting edge together form a slanting edge, and that a round cap together with a seal washer are fitted into the inverted edge of the floating bearing to form a single unit, and that the bottom edge of the rounded cap fit into the inverted and sloping edge of the floating bearing, so that the seal washer is able to act as a sealing unit in the space defined by this connection, and in this way ensure that in the fitting together of the round cap and seal washer a firm and fully sealed connection is effected.Type: ApplicationFiled: August 9, 2001Publication date: February 13, 2003Inventors: Lung-Tsai Chang, Guang-Der Tarng, Mao-Chuan Liu, Yeng-Chyi Liu
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Publication number: 20020098103Abstract: An oil passage for scroll compressor comprises a plurality of slanting gutters on top surface of the main bearing frame of the scroll compressor. The main bearing frame has a groove and an annular ring formed on topside thereof. The groove is communicated with the slanting gutters and the slanting gutters are slantingly intersected with the annular ring. The oil flows from the groove into the gutter, and then flows to the annular ring or topside of the main bearing frame to provide lubrication. The crumbs or crud are also flow out of the topside of the main bearing frame through the gutter.Type: ApplicationFiled: January 23, 2001Publication date: July 25, 2002Inventors: Guang-Der Tarng, Lung-Tsai Chang
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Patent number: 6413060Abstract: An oil passage for scroll compressor comprises a plurality of slanting gutters on top surface of the main bearing frame of the scroll compressor. The main bearing frame has a groove and an annular ring formed on topside thereof. The groove is communicated with the slanting gutters and the slanting gutters are slantingly intersected with the annular ring. The oil flows from the groove into the gutter, and then flows to the annular ring or topside of the main bearing frame to provide lubrication. The crumbs or crud also flow out of the topside of the main bearing frame through the gutter.Type: GrantFiled: January 23, 2001Date of Patent: July 2, 2002Assignee: Rechi Precision Co., Ltd.Inventors: Guang-Der Tarng, Lung-Tsai Chang
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Patent number: 6390792Abstract: A venting passage for isolation block of a scroll compressor and a check valve for the same. The compressor mainly comprises a fixed scroll member, an orbit scroll member, and an isolation block. The isolation block has venting passage and the venting passage has a through hole on bottom thereof and communicated with the discharging port of the fixed scroll member. A baffle is provided at top opening of the venting passage to form a muffle room. The venting passage has a floating planar valve. Moreover, the projecting ring has a plurality of venting apertures of window shape on top portion thereof and with even distribution.Type: GrantFiled: January 23, 2001Date of Patent: May 21, 2002Assignee: Rechi Precision Co., Ltd.Inventors: Guang-Der Tarng, Lung-Tsai Chang
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Patent number: 6257852Abstract: The present invention proposes a balance structure of axial submission device for a scroll compressor. The present invention is characterized in that narrower cross section forms on the isolating block partitioning high pressure from low pressure in a scroll compressor such that the direction toward the stationary scroll of low pressure side has larger direct back pressure. Or more than one balance rooms are installed on the isolating block toward the back of the stationary scroll, a first resilient member is placed in the balance room, and the resilient member is lapped on the back of the stationary scroll. More than one anti-pressure rooms can also be installed on the orbiting scroll, and a second resilient member is placed in the anti-pressure room to provide slightly larger pressure for the second resilient member than pressure of the first resilient member when the orbiting scroll starts to rotate.Type: GrantFiled: December 6, 1999Date of Patent: July 10, 2001Assignee: Rechi Precision Co., Ltd.Inventors: Guang-Der Tarng, Lung-Tsai Chang
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Patent number: 6241495Abstract: The present invention provides a modified positioning mechanism for the stationary scroll of a scroll compressor. Two opposed positioning blocks are installed on a frame of the scroll compressor. A vertically arranged fixing hole is disposed at each positioning block. A positioning bolt is fixed in each fixing hole. Two bumps extend from two sides of the stationary scroll of the scroll compressor. A vertically arranged positioning hole is disposed at each bump. The top of the positioning bolt is inserted in the positioning hole of the stationary scroll. Thereby process accuracy can be easily controlled, and components and products of inferior quality can be effectively reduced.Type: GrantFiled: November 2, 1999Date of Patent: June 5, 2001Assignee: Rechi Precision Co., Ltd.Inventor: Lung-Tsai Chang