Patents by Inventor Keiji Yamakawa

Keiji Yamakawa 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: 8657173
    Abstract: In a gas combustion type nail driving device, a head part (3) which is disposed on the front surface of the main body is provided with (a) a guide tube (35) through which a rod (17) and a nail n pass; (b) a main guide body (36) on which the guide tube (35) is disposed; (c) a subguide (37) which makes a pair with the main guide body (36) and forms a nail feed space; (d) a feed motor (48); and (e) a gear unit (46) which is driven by the feed motor (47). The nail connecting body N is fed to the guide tube (35) by the feed gear (73).
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: February 25, 2014
    Assignee: Japan Power Fastening Co,. Ltd.
    Inventors: Yasutsugu Uejima, Keiji Yamakawa
  • Patent number: 7896212
    Abstract: A gas combustion type coil nailer is provided with (a) a main body (1) which is provided with combustion chamber; (b) a head part (3) which is disposed on the front surface of this; and (c) a magazine 4 which is disposed on the bottom surface of the head part (3) so that it can be attached and detached easily. A coil shaped nail connecting body is loaded onto the magazine (4). The head part (3) is provided with (d) a guide tube (35) through which the rod (17) and the nail n pass; and (e) with a feed motor (47). The nail connecting body N is fed to the guide tube (35) by a feed gear which is driven by the feed motor (47). Power is supplied to the feed motor (47) from a battery. The rod (17) is driven and the nail is fed by separate motive forces so that the nail can be fed reliably without adversely affecting the accuracy and reliability of the driving capacity of the rod (17).
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: March 1, 2011
    Assignee: JPF Works Co., Ltd.
    Inventors: Yasutsugu Uejima, Keiji Yamakawa
  • Patent number: 7516841
    Abstract: To improve the function whereby each of the nails (2) is retained at a position which is vertical to both belt-shaped bodies (5,5) in the connecting nail (1) which is provided with multiple nails (2) with a head part (3) attached and two band-shaped belt-shaped bodies (5,5) which are made of a synthetic resin. This invention is provided with two belt-shaped bodies (5,5) which are disposed so that they are separate from one another in the axial direction of the nail (2) and parallel to one another and at the same time, multiple nail through holes (6a) are formed at appropriate intervals. Multiple cylindrical gripping parts (7) which communicate with the nail through holes (6a) and which can grip the shaft part (4) of the nail (2) are formed on both belt-shaped bodies (5,5).
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: April 14, 2009
    Assignee: Illinois Tool Works Inc.
    Inventors: Yasutsugu Uejima, Keiji Yamakawa
  • Publication number: 20080251559
    Abstract: A gas combustion type coil nailer is provided with (a) a main body (1) which is provided with combustion chamber; (b) a head part (3) which is disposed on the front surface of this; and (c) a magazine 4 which is disposed on the bottom surface of the head part (3) so that it can be attached and detached easily. A coil shaped nail connecting body is loaded onto the magazine (4). The head part (3) is provided with (d) a guide tube (35) through which the rod (17) and the nail n pass; and (e) with a feed motor (47). The nail connecting body N is fed to the guide tube (35) by a feed gear which is driven by the feed motor (47). Power is supplied to the feed motor (47) from a battery. The rod (17) is driven and the nail is fed by separate motive forces so that the nail can be fed reliably without adversely affecting the accuracy and reliability of the driving capacity of the rod (17).
    Type: Application
    Filed: March 30, 2005
    Publication date: October 16, 2008
    Applicant: JPF WORKS CO., LTD.
    Inventors: Yasutsugu Uejima, Keiji Yamakawa
  • Publication number: 20080210734
    Abstract: In a gas combustion type nail driving device, a head part (3) which is disposed on the front surface of the main body is provided with (a) a guide tube (35) through which a rod (17) and a nail n pass; (b) a main guide body (36) on which the guide tube (35) is disposed; (c) a subguide (37) which makes a pair with the main guide body (36) and forms a nail feed space; (d) a feed motor (48); and (e) a gear unit (46) which is driven by the feed motor (47). The nail connecting body N is fed to the guide tube (35) by the feed gear (73).
    Type: Application
    Filed: March 30, 2005
    Publication date: September 4, 2008
    Applicant: JPF WORKS CO., LTD.
    Inventors: Yasutsugu Uejima, Keiji Yamakawa
  • Publication number: 20080029414
    Abstract: To improve the function whereby each of the nails (2) is retained at a position which is vertical to both belt-shaped bodies (5,5) in the connecting nail (1) which is provided with multiple nails (2) with a head part (3) attached and two band-shaped belt-shaped bodies (5,5) which are made of a synthetic resin. This invention is provided with two belt-shaped bodies (5,5) which are disposed so that they are separate from one another in the axial direction of the nail (2) and parallel to one another and at the same time, multiple nail through holes (6a) are formed at appropriate intervals. Multiple cylindrical gripping parts (7) which communicate with the nail through holes (6a) and which can grip the shaft part (4) of the nail (2) are formed on both belt-shaped bodies (5,5).
    Type: Application
    Filed: September 16, 2004
    Publication date: February 7, 2008
    Applicant: ILLINOIS TOOL WORKS INC.
    Inventors: Yasutsugu Uejima, Keiji Yamakawa