Nippondenso Co., Ltd.

Jtekt Corporation

Koji Kubo

Hikaru Sugi

Susumu Abe

Masahito Ikeo

Yoshitaka Shinoda

Mineo Nishikawa

Yuya Kudo

A constant-velocity universal joint includes: an outer ring; an inner ring; a plurality of balls that engages with the outer-ring ball grooves and the inner-ring ball, grooves; and a holder that is interposed between an inner spherical surface of the outer ring and an outer spherical surface of the inner ring and in which a holding window for holding the plurality of balls is formed. A chamfered portion is formed in the inner ring. The chamfered portion includes a linear section portion that is formed in a linear shape in a section perpendicular to a moving locus of the center of the corresponding ball and an arc section portion that is formed in a protruding arc shape in the section perpendicular to the moving locus of the center of the corresponding ball.

Constant-speed universal joint

When a fluid is jetted from an orifice having a small diameter into an ample space having a much greater cross-sectional area than the orifice, as in the case of a refrigerant jetted from a restriction or orifice into a refrigerant pipe of a refrigeration system, jet noise of high frequency is generated in the region around the orifice. In order to suppress the generation of this jet noise, the present invention provides a silencer which includes a casing, an orifice of a small diameter arranged in the casing for jetting a refrigerant into the casing and an obstruction disposed in the casing at a position within a distance which is 5 times as large as the diameter of the orifice. The obstruction can have various forms such as bar-like form, disc-like form and so forth and can be made from various materials such as rubbers, plastics and metals. The obstruction disposed at such a position cause a change of pattern of the fluid flow to effectively suppress the generation of noise.

Silencer in a refrigeration system

Growing community of inventors

Kariya, Japan

Koji Kubo