Patents by Inventor Yoshitsugu Sawada

Yoshitsugu Sawada 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).

  • Publication number: 20010014562
    Abstract: A crimp connector 1 comprises a plurality of crimp terminals 23, and a housing 22 for containing the crimp terminals 23. Each of the crimp terminals 23 includes an electric wire crimping portion 31 and electric wire fixing portions 32, 32. The housing 22 includes partition walls 26, 26 uprightly provided on a base plate 25 to define groove-shaped terminal receiving chambers 24. The partition walls 26, 26 are provided with concave cut-out spaces 28, 28. The cut-out spaces 28, 28 are formed at positions facing with outer faces of the electric wire fixing portions 32, 32.
    Type: Application
    Filed: February 7, 2001
    Publication date: August 16, 2001
    Applicant: Yazaki Corporation
    Inventors: Takao Murakami, Yoshitsugu Sawada
  • Patent number: 5788536
    Abstract: A connector in which the connecting terminal is prevented from shifting or playing, and the male and female terminals are positively engaged with each other. The connector comprises a plurality of elongated protrusions 20 formed on the walls of a terminal accommodating chamber 12 in such a manner that they extend in the direction of insertion of a female terminal 13. The female terminal includes a wire clamping section 18 comprising a conductor clamping portion 28 and a cover clamping portion 29. A locking protrusion 21 formed on the bottom of the cover clamping portion 29 is engaged with a locking groove 22 formed in the connector housing 11. Furthermore, the height of the cover clamping portion 29 is made substantially equal to the terminal accommodating chamber 12. Hence, both the position of the front end portion of the female terminal 13 and the position of the wire clamping section 18, which is the rear end portion of the terminal, are positively regulated.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: August 4, 1998
    Assignee: Yazaki Corporation
    Inventors: Toshifumi Matsuura, Yoshitsugu Sawada, Noboru Yamaguchi
  • Patent number: 5632653
    Abstract: A waterproof connector having a housing including terminal accommodation chambers for accommodating metal terminals connected to ends of electric wires, a waterproof cap disposed at the rear end of the housing, through which the electric wires are drawn, and having electric-wire insertion openings through which the drawn electric wires are inserted in such a manner that the electric wires are in close contact with one another, and a waterproof-cap holder for holding the waterproof cap together with the housing to mount the waterproof cap on the rear end thereof and having electric-wire drawing openings through which the electric wires inserted through the electric-wire insertion openings are drawn, wherein the waterproof-cap holder has a water-discharge-space forming member for forming a space for discharging, to the outside of the waterproof connector, water introduced into a space between the waterproof-cap holder and the waterproof cap through the electric-wire drawing openings, the space being formed betw
    Type: Grant
    Filed: April 4, 1996
    Date of Patent: May 27, 1997
    Assignee: Yazaki Corporation
    Inventor: Yoshitsugu Sawada
  • Patent number: 5630731
    Abstract: A waterproof connector is provided of a type in which terminals are inserted by an after-fitting operation into a connector housing with a waterproof rubber plug fitted thereto, in which the rubber plug is prevented from shifting in position from the connector housing during the insertion of the terminals to thereby facilitate terminal insertion operation. A waterproof rubber plug (2) consists of an integral combination of a sealing rubber plate part (9) including a plurality of insertion holes to be in close contact with their respective terminals (A), and a shift-preventing resin plate (10) including windows (14) for arranging the insertion holes of the rubber plate part (9) therein by groups each comprising a given number of insertion holes. The resin plate (10) further includes engaging groove portions (16) which are engageable with securing projections (18) provided in a housing main body (1a).
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: May 20, 1997
    Assignee: Yazaki Corporation
    Inventor: Yoshitsugu Sawada
  • Patent number: 5620347
    Abstract: A contact portion structure of a female terminal (1) has a pair of opposing elastic plate portions (4), two pairs of flat plate-shaped contact portions (5) each pair extending from one of the opposing elastic plate portions (4) and bent at right angles at each end thereof, and contact projections (8) each formed on each inner surface of the flat plate-shaped contact portion (5) and brought into contact with a pin portion (7) of a mated male terminal (6). In particular, a diameter of the contact projections (8) is determined larger than a V-shaped groove (9) of the pin portion (7) of the mated male terminal (6). As a result, it is possible to prevent any contact projection (8) from entering the V-shaped junction groove (9) of the pin portion (7) of the male terminal (6), so that the two male and female terminals can be connected to each other stably without any eccentric contact.
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: April 15, 1997
    Assignee: Yazaki Corporation
    Inventor: Yoshitsugu Sawada
  • Patent number: 5618206
    Abstract: A waterproof connector comprises: a connector housing (29, 89) formed with a plurality of terminal accommodation chambers (27, 93) for accommodating a plurality of terminal parts (53, 117), respectively and with a seal hood portion (39, 105); and a sealing member (25, 91) fitted to the seal hood portion of the housing and formed with a plurality of seal locating projections (47, 109) each having an insertion hole (45, 107) at a center thereof. A plurality of terminal parts (53, 117) connected to wires (51, 115), respectively are inserted into the terminal accommodation chambers of the housing, through the wire insertion holes of the sealing member fitted to the seal hood portion of the housing, respectively under watertight conditions.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: April 8, 1997
    Assignee: Yazaki Corporation
    Inventors: Yoshitsugu Sawada, Toshihiko Masuda
  • Patent number: 5599212
    Abstract: A female terminal body consists of elastic contact pieces which are separated from each other in a peripheral direction by slits elongating in a longitudinal direction, a cylindrical base portion for fixing a sleeve, a conductor clamping portion to which a conductor of an electric wire W is to be fixed, and a wire cover clamping portion. The elastic contact pieces are disposed in a front part of the terminal body, the cylindrical base portion in a middle part, and the conductor clamping portion and the wire cover clamping portion in a rear part. The elastic contact pieces elongating from the cylindrical base portion constitute a cylinder having a diameter which gradually decreases as moving more distant from the cylindrical base portion, so that the male terminal is pressingly contacted to and clamped by their front ends. In order to facilitate the insertion of the male terminal, the front end portion of the cylinder has a diameter which gradually increases.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: February 4, 1997
    Assignee: Yazaki Corporation
    Inventor: Yoshitsugu Sawada
  • Patent number: 5588875
    Abstract: A connector comprises a connector housing (20) formed with a terminal accommodating chamber (21) and a lance (24); and a terminal (30, 40, 50) inserted into the terminal accommodating chamber of the connector housing and engaged with the lance for prevention of removal of the terminal from the connector housing. In particular, knurled portions (26, 37, 47, 55) are formed both in the lance and the terminal, respectively to prevent the terminal inserted into the terminal accommodating chamber from being moved within the connector housing. When the terminal is inserted into the connector housing, as far as the terminal is not e gaged with the lance, the terminal can be moved within the connector housing for positional adjustment between the two. However, after the terminal has been engaged with the lance, the terminal can be fixed to the connector housing firmly by the presence of the knurled portions.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: December 31, 1996
    Assignee: Yazaki Corporation
    Inventor: Yoshitsugu Sawada
  • Patent number: 5533914
    Abstract: An electrical connection terminal includes a male terminal having a rod-like male contact portion, a tubular female terminal having a through hole for receiving the male contact portion, a resilient contact member of an annular shape which is retained in the through hole along an axis A, and can be brought into surface-to-surface contact with the male contact portion, and a conductor clamping portion and a covering clamping portion which are formed integrally with the female terminal at a rear end portion thereof through a retaining step portion, and extend in the axial direction. The resilient contact member is made of a material having a good electrical conductivity, and has an integral clamping piece which extends through the through hole in the retaining step portion to the conductor clamping portion. The covering clamping portion fixedly clamps a conductor covering, and the conductor clamping portion fixedly clamps a conductor and the clamping piece together.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: July 9, 1996
    Assignee: Yazaki Corporation
    Inventor: Yoshitsugu Sawada
  • Patent number: 5516310
    Abstract: In a female terminal body, a plurality of elastic contact pieces by which a male terminal is to be clamped and which are separated from each other in a peripheral direction by slits elongating in a longitudinal direction are disposed in a front part, and a cylindrical base portion for fixing a sleeve is formed in a middle part. On the cylindrical base portion, four grooves which are long grooves elongating in the axial direction and arranged in the peripheral direction at equal intervals, and an annular step portion for receiving the sleeve are formed. On the other hand, the sleeve which is a circular cylindrical protection member opens at the rear end so that the sleeve can be fitted onto the cylindrical base portion. Four beads which project toward the inside of the sleeve are formed in such a manner that they elongate with starting from the opening in the axial direction. The beads are disposed so as to respectively correspond to the grooves of the cylindrical base portion.
    Type: Grant
    Filed: May 16, 1994
    Date of Patent: May 14, 1996
    Assignee: Yazaki Corporation
    Inventor: Yoshitsugu Sawada
  • Patent number: 5487686
    Abstract: A pin terminal includes a rounded pin-like electrical connection portion, a body portion, an interconnecting portion, a conductor clamping portion and a covering clamping portion, and this pin terminal is processed into a roll-shape. A drawn portion of a corrugated configuration is circumferentially provided by pressing between the cylindrical body portion of a larger diameter and each of the electrical connection portion of a smaller diameter and the interconnecting portion of a smaller diameter.
    Type: Grant
    Filed: June 9, 1994
    Date of Patent: January 30, 1996
    Assignee: Yazaki Corporation
    Inventor: Yoshitsugu Sawada
  • Patent number: 5413507
    Abstract: In a high density multi-pole connector composed of a male connector (21) having a plurality of terminal accommodating chambers and a female connector (41) also having a plurality of terminal accommodating chambers, at least one of the male and female connectors (21, 41) is divided into a plurality of separate connector housings (23, 43); and the separate connector housings are coupled to one another with a coupling block (22, 42) provided with coupling structures (28, 49) formed on both the separate connector housings (23, 43) and the coupling block (22, 42) respectively, for removably coupling the coupling block with the separate connector housings. In the high density multi-pole connector, it is possible to freely increase the number of terminals and modify the terminal arrangement positions within the connector housings; that is, various connectors of any sizes can be assembled with the use of the common coupling block (22, 42).
    Type: Grant
    Filed: January 19, 1994
    Date of Patent: May 9, 1995
    Assignee: Yazaki Corporation
    Inventor: Yoshitsugu Sawada
  • Patent number: 5232373
    Abstract: A connector with a cover for connecting an electric wire to a printed circuit board or a like element wherein a half inserted condition of a terminal accommodated in a housing can be detected. A plurality of terminal accommodating chambers each having a flexible arresting piece formed on an inner wall thereof are formed in a housing body and each has a terminal accommodated therein. The terminal is connected at an end thereof to an electric wire and has an engaging hole formed at a rear face of the end portion thereof. The terminal further has a contact piece folded back over itself from the other end to an intermediate portion thereof and has a protrusion formed at an intermediate portion thereof by bending a pair of side plates thereof inwardly toward each other. The contact pieces and protrusions are exposed outside through slots formed in a top plate of the housing body.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: August 3, 1993
    Assignee: Yazaki Corporation
    Inventor: Yoshitsugu Sawada
  • Patent number: 5108310
    Abstract: An electrical connector (11) including a housing (13), arms (27) defectable into a space (31) disposed under the arms (27), and a spacer block (17) finally positioned in the space (31) for preventing involuntary deflection of the arms. A projection (27a) of the arm (27) engages with a splicer in the connector (11) to prevent the splicer from coming out of the connector. The spacer block (17) has devices (35a, 35b) by which the spacer block (17) is placed and engaged in a temporary position in the connector, and has an inclined portion (37) on which an implement for disengaging the projection (27a) from the splicer is guided accurately to a forked end (27a, 27b) of the arm (27).
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: April 28, 1992
    Assignee: Yazaki Corporation
    Inventors: Yoshitsugu Sawada, Takayuki Yamamoto, Masakuni Samejima
  • Patent number: D323141
    Type: Grant
    Filed: July 12, 1989
    Date of Patent: January 14, 1992
    Assignee: Yazaki Corporation
    Inventors: Tadahiro Sueyoshi, Yukio Ohta, Yoshitsugu Sawada
  • Patent number: D323142
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: January 14, 1992
    Assignee: Yazaki Corporation
    Inventors: Yasuhiro Nagasaka, Yasuo Hirayama, Yoshitsugu Sawada, Yukio Ohta
  • Patent number: D323152
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: January 14, 1992
    Assignee: Yazaki Corporation
    Inventors: Yasuhiro Nagasaka, Yasuo Hirayama, Yoshitsugu Sawada, Yukio Ohta
  • Patent number: D324671
    Type: Grant
    Filed: February 15, 1989
    Date of Patent: March 17, 1992
    Assignee: Yazaki Corporation
    Inventors: Toshiharu Kawashima, Yoshitsugu Sawada, Keishi Jinno
  • Patent number: D329222
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: September 8, 1992
    Assignee: Yazaki Corporation
    Inventors: Yasuhiro Nagasaka, Yasuo Hirayama, Yoshitsugu Sawada, Yukio Ohta
  • Patent number: D334013
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: March 16, 1993
    Assignee: Yazaki Corporation
    Inventors: Yasuhiro Nagasaka, Yasuo Hirayama, Yoshitsugu Sawada, Yukio Ohta