Patents by Inventor Eiichi Ito

Eiichi Ito 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: 4720205
    Abstract: A ball joint includes a bearing which exerts a free play take up force against a ball stud. The bearing has trapezoidal-shaped spring arms connected therewith and disposed in a radial array. The free ends of the spring arms extend toward the longitudinal central axis of the ball stud. The free ends of the spring arms engage a housing cover and resiliently deflect to exert the free play take up force against the ball stud. The free ends of the spring arms are spaced from the ball stud.
    Type: Grant
    Filed: January 30, 1987
    Date of Patent: January 19, 1988
    Assignee: TRW Ehrenreich GmbH & Co. KG
    Inventor: Eiichi Ito
  • Patent number: 4615638
    Abstract: The subject of the invention is a ball joint for motor vehicles with a bearing shell arranged between a joint housing and a ball head. The shell is provided at one end with elastically deformable ribs projecting from a stop surface. So that the ribs, after compensating for production tolerances, can absorb, in the elastically deformable zone, additional axial shock loads occurring in driving operation, it is proposed that the ribs be designed as square ribs, running radially, and separated by grooves from the stop surface adjoining their side walls, while the volume of each rib projecting above the stop surface, before mounting, is approximately equal to the free volume of the two grooves adjacent to it, so that the side walls of the grooves lying next to the stop surface act in the mounted condition as support walls for the elastically deformed ribs.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: October 7, 1986
    Assignee: TRW Ehrenreich GmbH & Co., KG
    Inventor: Eiichi Ito
  • Patent number: 4577989
    Abstract: The subject of the invention is a ball joint for motor vehicles comprising a bearing insert (4) located between a joint housing (1) and a ball head (3). The bearing insert is provided with meridionally extending slots (9) arranged in a half-portion gripping of the ball head over the equator. A clamping ring (5) located in the housing grips the tongues (10) of this bearing insert (4). To improve the elasticity of the bearing parts while retaining a good distribution of lubricant, the clamping ring (5) is provided with circumferential grooves (13) on its inner surface and with openings (15) in the outer end surface (14).
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: March 25, 1986
    Assignee: TRW Ehrenreich GmbH & Co. KG
    Inventor: Eiichi Ito
  • Patent number: 4564307
    Abstract: The subject of the invention is a ball joint including a stud having a ball head located in a bearing shell made of elastic material. The bearing shell, which exerts a radial pressure on the ball head, is mounted in a joint housing having substantially a pot shape. The bearing shell is provided on its outer surface with elastically deformable elevations, lying against the inner wall of the joint housing. The elevations are arranged on the shell surface of the bearing shell and are formed as ribs and bars extending in the axial direction and arranged alternatively on the shell surface circumference. The bars are separated from the ribs by grooves. The bar width, measured in the circumferential direction, is greater than the width of the ribs. The radial extent of the ribs is greater than that of the bars. The bars thus bear against the joint housing only in the case of large loads acting on the joint.
    Type: Grant
    Filed: October 29, 1984
    Date of Patent: January 14, 1986
    Assignee: TRW Ehrenreich GmbH & Co. K.G.
    Inventor: Eiichi Ito