Patents by Inventor Man-Chi Chang
Man-Chi 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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Patent number: 9868195Abstract: A hand tool assembly includes a cylindrical first body having multiple first grooves. A driving head is connected to one end of the first body and has a ratchet wheel which is controlled by a ratchet mechanism in the driving head. The first body extends through the ratchet wheel. A handle unit is movably mounted to the first body and the handle unit is selectively positioned at one of the first grooves. The second body has two different connection portions on two ends thereof, and the second body can be replaced by other handle tools.Type: GrantFiled: October 19, 2015Date of Patent: January 16, 2018Inventor: Man-Chi Chang
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Publication number: 20170106505Abstract: A ratchet wrench includes a tubular body, a ratchet unit, a driving head, a control unit and a connection unit. The ratchet unit is operated in either rotation mode or spinning mode. The control unit controls the ratchet unit to rotate clockwise or counter clockwise. The connection unit is connected with a tool. When the body is rotated, the ratchet unit drives the driving head to rotate an object connected to the driving head. When the tool is span relative to the body, the ratchet unit also drives the driving head to rotate an object.Type: ApplicationFiled: October 18, 2015Publication date: April 20, 2017Inventor: Man-Chi Chang
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Publication number: 20170106508Abstract: A hand tool assembly includes a cylindrical first body having multiple first grooves. A driving head is connected to one end of the first body and has a ratchet wheel which is controlled by a ratchet mechanism in the driving head. The first body extends through the ratchet wheel. A handle unit is movably mounted to the first body and the handle unit is selectively positioned at one of the first grooves. The second body has two different connection portions on two ends thereof, and the second body can be replaced by other handle tools.Type: ApplicationFiled: October 19, 2015Publication date: April 20, 2017Inventor: Man-Chi Chang
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Publication number: 20170066120Abstract: A hand tool assembly includes a rod and a handle which is pivotably connected to the rod, and a control unit which is movable along the rod. When the rod and the handle are located linearly, the control unit is moved to a position where the rod and the handle are secured linearly. When the handle is perpendicular to the rod, the control unit is moved another position where the handle is secured perpendicularly to the rod. The rod and the handle are able to be connected with different hand tools.Type: ApplicationFiled: September 3, 2015Publication date: March 9, 2017Inventor: Man-Chi Chang
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Patent number: 9120207Abstract: A pair of pliers includes two parts pivotably connected to each other. The two parts respectively have jaws located correspondingly. A control member has one end pivotably connected to one part and an operation rod is pivotably connected to the other part and has one end movably inserted into the control member. A control lever has a first hole through which the operation rod extends. The operation rod has a first engaging portion which is engaged with a second engaging portion of the control lever. A resilient member is in contact with the control lever to engage the second engaging portion with the first engaging portion to set a desired angle between the two parts.Type: GrantFiled: November 13, 2012Date of Patent: September 1, 2015Inventor: Man-Chi Chang
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Patent number: 9068735Abstract: A magnetic retainer includes a body, a magnetic member, a plate and a light unit. The body has a space for receiving objects and the magnetic member is connected to the bottom of the body to attract the objects. The plate has a concaved portion for receiving the objects and is rotatably connected to the body. When the light unit is rotated to a first position relative to the plate, the light emitting member faces outside of the plate. When the light unit is rotated to a second position relative to the plate, the light emitting member faces the concaved portion of the plate.Type: GrantFiled: January 9, 2013Date of Patent: June 30, 2015Inventor: Man-Chi Chang
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Patent number: 8869659Abstract: A hand tool includes a shank, a sleeve, a control member, a pressing member, an end piece and a resilient member. The shank has multiple annular grooves. The control member and the resilient member are located in the chamber of the sleeve and the end piece closes the sleeve. The shank extends through the control member and the end piece. When the pressing member is not applied by a force, the sleeve can only rotate relative to the shank and cannot move relative to the shank. When the sleeve is applied by a force, the sleeve can move relative to the shank.Type: GrantFiled: October 3, 2012Date of Patent: October 28, 2014Inventor: Man-Chi Chang
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Publication number: 20140209199Abstract: A pipe sealing device includes a body, multiple mounting members and a sealing member. The body has a space and a first connection portion. Two first contact portions extend from the first end of the body and each mounting member has two second contact portions which contact the first contact portions. The mounting members are located in the space and each has a recess with which a pipe is engaged. The pipe has an opening which contacts the end faces of the recess. The sealing member has a second connection portion which is connected to the first connection portion of the body. The second connection portion has a sealing face which seals the opening of the pipe.Type: ApplicationFiled: January 25, 2013Publication date: July 31, 2014Inventor: Man-Chi Chang
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Publication number: 20140130641Abstract: A pair of pliers includes two parts pivotably connected to each other. The two parts respectively have jaws located correspondingly. A control member has one end pivotably connected to one part and an operation rod is pivotably connected to the other part and has one end movably inserted into the control member. A control lever has a first hole through which the operation rod extends. The operation rod has a first engaging portion which is engaged with a second engaging portion of the control lever. A resilient member is in contact with the control lever to engage the second engaging portion with the first engaging portion to set a desired angle between the two parts.Type: ApplicationFiled: November 13, 2012Publication date: May 15, 2014Inventor: Man-Chi Chang
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Publication number: 20140090524Abstract: A hand tool includes a shank, a sleeve, a control member, a pressing member, an end piece and a resilient member. The shank has multiple annular grooves. The control member and the resilient member are located in the chamber of the sleeve and the end piece closes the sleeve. The shank extends through the control member and the end piece. When the pressing member is not applied by a force, the sleeve can only rotate relative to the shank and cannot move relative to the shank. When the sleeve is applied by a force, the sleeve can move relative to the shank.Type: ApplicationFiled: October 3, 2012Publication date: April 3, 2014Inventor: Man-Chi Chang
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Publication number: 20130255449Abstract: A hand tool includes a body, two control units and a connection member. The body is connected with another tool. The two control units are respectively connected to the body and each control unit includes a control member, a sleeve, multiple engaging members, a connection ring and a resilient member. The connection member is mounted to the body and located between the two control units.Type: ApplicationFiled: March 29, 2012Publication date: October 3, 2013Inventor: Man-Chi Chang
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Patent number: 8464616Abstract: A tool includes first, second and third rods which are pivotably and pivotably connected to each other. The first rod is pivotably connected between the second and third rods. Control members, resilient members and contacting members are located at the pivotal portions so as to control the first rod to be pivotable or positioned relative to the second and third rods.Type: GrantFiled: September 25, 2011Date of Patent: June 18, 2013Inventor: Man-Chi Chang
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Publication number: 20130128597Abstract: A magnetic retainer includes a body, a magnetic member, a plate and a light unit. The body has a space for receiving objects and the magnetic member is connected to the bottom of the body to attract the objects. The plate has a concaved portion for receiving the objects and is rotatably connected to the body. When the light unit is rotated to a first position relative to the plate, the light emitting member faces outside of the plate. When the light unit is rotated to a second position relative to the plate, the light emitting member faces the concaved portion of the plate.Type: ApplicationFiled: January 9, 2013Publication date: May 23, 2013Inventor: Man-Chi Chang
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Publication number: 20130118936Abstract: The present invention relates to a magnetic container which includes a main body, a magnetic body and a storage disc, wherein the main body has a storage part, a brim edge, a transversal long hole, a fastener and a receiving chamber. The magnetic body is disposed in the center of the main body. The pivot of the storage disc is pivotally connected in the transversal long hole of the main body so that the storage disc can open or overlap relatively to the storage part. The storage disc has a stop edge to support the brim edge, and fastening blocks to fasten the fastener. An elastically extendable fastening element is disposed in the receiving chamber. Tools and parts can be inserted or clamped in the fastening element. Thus, the magnetic container has multiple functions on magnetic sucking and parts storage.Type: ApplicationFiled: November 15, 2011Publication date: May 16, 2013Inventor: Man-Chi Chang
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Publication number: 20130074661Abstract: A tool includes first, second and third rods which are pivotably and pivotably connected to each other. The first rod is pivotably connected between the second and third rods. Control members, resilient members and contacting members are located at the pivotal portions so as to control the first rod to be pivotable or positioned relative to the second and third rods.Type: ApplicationFiled: September 25, 2011Publication date: March 28, 2013Inventor: Man-Chi Chang
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Patent number: 6735872Abstract: An improved cutter knife and particularly to a cutter knife allowing positive and inverse gripping when in use consists of an upper shell and a lower shell that are coupled to form a body. The body has one end forming a handgrip conforming to ergonomics to allow positive and inverse gripping. The handgrip has a blade anchor section and a blade fast change section on one end to allow positive or inverse gripping and fast replacement of the blade. The positive gripping may be used for ordinary cutting such as for paper or cloths. The inverse gripping may be used for heavy duty cutting with a greater force such as for cardboard or wooden laminates. Thus it provide dual functions and may be used conveniently to overcome the limitation of conventional cutter knives that allow only positive gripping.Type: GrantFiled: March 25, 2003Date of Patent: May 18, 2004Inventor: Man-Chi Chang
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Patent number: D653452Type: GrantFiled: June 20, 2011Date of Patent: February 7, 2012Inventor: Man-Chi Chang