Patents by Inventor Hideyasu Yamanaka

Hideyasu Yamanaka 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).

  • Light source device for an image forming apparatus
    Patent number: 6502960
    Abstract: A light source device for use in an image forming apparatus and using a semiconductor laser is disclosed. The device needs a minimum of constituent parts and frees the individual part from dislocation in the event of assembly. A collimator lens included in the device is fixed in place by photo-curable adhesive. The device is low cost and highly accurate.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: January 7, 2003
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhiro Naoe, Akio Yashiba, Hideyasu Yamanaka
  • Light source device for an image forming apparatus
    Publication number: 20020006041
    Abstract: A light source device for use in an image forming apparatus and using a semiconductor laser is disclosed. The device needs a minimum of constituent parts and frees the individual part from dislocation in the event of assembly. A collimator lens included in the device is fixed in place by photo-curable adhesive. The device is low cost and highly accurate.
    Type: Application
    Filed: August 20, 2001
    Publication date: January 17, 2002
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yasuhiro Naoe, Akio Yashiba, Hideyasu Yamanaka
  • Light source device for an image forming apparatus
    Patent number: 6299331
    Abstract: A light source device for use in an image forming apparatus and using a semiconductor laser is disclosed. The device needs a minimum of constituent parts and frees the individual part from dislocation in the event of assembly. A collimator lens included in the device is fixed in place by photo-curable adhesive. The device is low cost and highly accurate.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: October 9, 2001
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhiro Naoe, Akio Yashiba, Hideyasu Yamanaka
  • Light source device for an image forming apparatus
    Patent number: 6179445
    Abstract: A light source device for use in an image forming apparatus and using a semiconductor laser is disclosed. The device needs a minimum of constituent parts and frees the individual part from dislocation in the event of assembly. A collimator lens included in the device is fixed in place by photo-curable adhesive. The device is low cost and highly accurate.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: January 30, 2001
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhiro Naoe, Akio Yashiba, Hideyasu Yamanaka
  • Light source device for an image forming apparatus
    Patent number: 5997153
    Abstract: A light source device for use in an image forming apparatus and using a semiconductor laser is disclosed. The device needs a minimum of constituent parts and frees the individual part from dislocation in the event of assembly. A collimator lens included in the device is fixed in place by photo-curable adhesive. The device is low cost and highly accurate.
    Type: Grant
    Filed: March 17, 1998
    Date of Patent: December 7, 1999
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhiro Naoe, Akio Yashiba, Hideyasu Yamanaka
  • Light source device for an image forming apparatus
    Patent number: 5758950
    Abstract: A light source device for use in an image forming apparatus and using a semiconductor laser is disclosed. The device needs a minimum of constituent parts and frees the individual part from dislocation in the event of assembly. A collimator lens included in the device is fixed in place by photo-curable adhesive. The device is low cost and highly accurate.
    Type: Grant
    Filed: July 2, 1996
    Date of Patent: June 2, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhiro Naoe, Akio Yashiba, Hideyasu Yamanaka
  • Stepping motor drive apparatus
    Patent number: 4339702
    Abstract: A stepping motor (31) drives a load (33) such as an ink ribbon in a printer which exerts reverse torque on the motor shaft (32) thus displacing the shaft (32) slightly in the reverse direction when a low hold current is applied to a motor phase. Prior to switching the motor (31) to a next phase for rotation, a high drive current is applied to the present phase. After a certain length of time which is sufficient for the shaft (32) to be moved to the correct present position, the phases are sequentially switched while the high drive current is applied for rotating the shaft (32) and load to a new position.
    Type: Grant
    Filed: September 8, 1980
    Date of Patent: July 13, 1982
    Assignee: Ricoh Company, Ltd.
    Inventors: Shigeyuki Araki, Hideyasu Yamanaka