Patents by Inventor Pin-Feng Chang

Pin-Feng 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).

  • Patent number: 8132797
    Abstract: A floating-type clamping device includes a pneumatic cylinder unit, a pressing plate, a floating plate, two grips, an air supply pipe unit, and a safety control unit. The pneumatic cylinder unit includes at least one cylinder. The floating plate includes a plate body, a plurality of nozzles, and an air passage disposed inside the plate body and communicated with the nozzles. The plate body cooperates with the pressing plate to clamp a plate material when the pressing plate moves downward. The air supply pipe unit is connected and supplies compressed air to the pneumatic cylinder unit and the floating plate. The safety control unit is connected to the air supply pipe unit and is operable to block or permit the flow of the compressed air into at least one of the cylinder and the air passage.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: March 13, 2012
    Inventor: Pin-Feng Chang
  • Publication number: 20100301535
    Abstract: A floating-type clamping device includes a pneumatic cylinder unit, a pressing plate, a floating plate, two grips, an air supply pipe unit, and a safety control unit. The pneumatic cylinder unit includes at least one cylinder. The floating plate includes a plate body, a plurality of nozzles, and an air passage disposed inside the plate body and communicated with the nozzles. The plate body cooperates with the pressing plate to clamp a plate material when the pressing plate moves downward. The air supply pipe unit is connected and supplies compressed air to the pneumatic cylinder unit and the floating plate. The safety control unit is connected to the air supply pipe unit and is operable to block or permit the flow of the compressed air into at least one of the cylinder and the air passage.
    Type: Application
    Filed: May 29, 2009
    Publication date: December 2, 2010
    Inventor: Pin-Feng Chang
  • Patent number: 7631674
    Abstract: A working machine includes a main frame, a work table, a plurality of working tools, and a distance adjustment device. The distance adjustment device includes two guide tracks, two positioning members, and an adjustment unit. Thus, the adjustment unit can be used to adjust the position of the workpiece relative to the work table to adjust the working distance of the workpiece, thereby facilitating a user working the workpiece. In addition, the locking portion of each of the positioning rods is locked in the positioning holes of the respective positioning member closely, so that each of the fixing seats is fixed on the respective positioning member to position the adjustment unit so as to adjust the working distance of the workpiece exactly.
    Type: Grant
    Filed: August 15, 2006
    Date of Patent: December 15, 2009
    Inventor: Pin-Feng Chang
  • Patent number: 7537420
    Abstract: A working machine includes a base for placing a workpiece, a working mechanism movable relative to a first face of the workpiece, a clamping unit movable relative to a second face of the workpiece, a linkage connected to the working mechanism and the clamping unit to drive the working mechanism and the clamping unit to move relative to the workpiece simultaneously, and a drive unit connected to the linkage. Thus, the working machine is operated by a user's one foot, so that the working machine is operated easily and conveniently. In addition, the workpiece is clamped automatically without having to hold the workpiece by a user's one hand, thereby protecting the user's safety.
    Type: Grant
    Filed: August 15, 2006
    Date of Patent: May 26, 2009
    Inventor: Pin-Feng Chang
  • Patent number: 7396195
    Abstract: A working machine includes a blade seat movable relative to a sheet plate, and a safety protective device mounted on the blade seat to cover the blades of the blade seat and including at least one swing member pivotally mounted on the blade seat, and a protective board pivotally connected to the at least one swing member. Thus, when any portion of the protective board is pushed by the sheet plate, the whole protective board is driven to pivot relative to the blade seat so that the protective board is moved upward and downward in a whole manner without deflection.
    Type: Grant
    Filed: May 2, 2005
    Date of Patent: July 8, 2008
    Inventor: Pin-Feng Chang
  • Publication number: 20070277662
    Abstract: A working machine includes a main frame, a work table, a plurality of working tools, and a distance adjustment device. The distance adjustment device includes two guide tracks, two positioning members, and an adjustment unit. Thus, the adjustment unit can be used to adjust the position of the workpiece relative to the work table to adjust the working distance of the workpiece, thereby facilitating a user working the workpiece. In addition, the locking portion of each of the positioning rods is locked in the positioning holes of the respective positioning member closely, so that each of the fixing seats is fixed on the respective positioning member to position the adjustment unit so as to adjust the working distance of the workpiece exactly.
    Type: Application
    Filed: August 15, 2006
    Publication date: December 6, 2007
    Inventor: Pin-Feng Chang
  • Publication number: 20070122244
    Abstract: A working machine includes a base for placing a workpiece, a working mechanism movable relative to a first face of the workpiece, a clamping unit movable relative to a second face of the workpiece, a linkage connected to the working mechanism and the clamping unit to drive the working mechanism and the clamping unit to move relative to the workpiece simultaneously, and a drive unit connected to the linkage. Thus, the working machine is operated by a user's one foot, so that the working machine is operated easily and conveniently. In addition, the workpiece is clamped automatically without having to hold the workpiece by a user's one hand, thereby protecting the user's safety.
    Type: Application
    Filed: August 15, 2006
    Publication date: May 31, 2007
    Inventor: Pin-Feng Chang
  • Publication number: 20060243109
    Abstract: A working machine includes a blade seat movable relative to a sheet plate, and a safety protective device mounted on the blade seat to cover the blades of the blade seat and including at least one swing member pivotally mounted on the blade seat, and a protective board pivotally connected to the at least one swing member. Thus, when any portion of the protective board is pushed by the sheet plate, the whole protective board is driven to pivot relative to the blade seat so that the protective board is moved upward and downward in a whole manner without deflection.
    Type: Application
    Filed: May 2, 2005
    Publication date: November 2, 2006
    Inventor: Pin-Feng Chang
  • Patent number: 7107699
    Abstract: A workpiece size alignment device includes a rail set including a plurality of guide rails each having a top face formed with an elongated guide channel extended longitudinally, and a ruler set mounted on the rail set and including a plurality of rulers each removably mounted in the guide channel of a respective one of the guide rails. Thus, the workpiece size alignment device has multiple rulers having different units for use and replacement, so that the operator can select the rulers having different units according to different working requirements, thereby greatly facilitating the operator working the workpiece.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: September 19, 2006
    Inventor: Pin-Feng Chang
  • Publication number: 20060174505
    Abstract: A workpiece size alignment device includes a rail set including a plurality of guide rails each having a top face formed with an elongated guide channel extended longitudinally, and a ruler set mounted on the rail set and including a plurality of rulers each removably mounted in the guide channel of a respective one of the guide rails. Thus, the workpiece size alignment device has multiple rulers having different units for use and replacement, so that the operator can select the rulers having different units according to different working requirements, thereby greatly facilitating the operator working the workpiece.
    Type: Application
    Filed: February 10, 2005
    Publication date: August 10, 2006
    Inventor: Pin-Feng Chang
  • Patent number: D554911
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: November 13, 2007
    Inventor: Pin-Feng Chang