The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 2005
Filed:
May. 16, 2003
Yoshitomo Ishizaki, Kyotanabe, JP;
Yoshitomo Ishizaki, Kyotanabe, JP;
Takako Industries, Inc., Kyoto, JP;
Abstract
The invention provides a shoe for a hydraulic apparatus and manufacturing method thereof, by which production cost can be lowered without making a sliding-contact surface uneven by a welding process. The shoe comprises a main body () provided on one side () thereof with a concave spherical surface () to which a sphere is slidably engaged, and on the opposite side () thereof with a locking portion () and a sliding-contact plate () provided with an engaging portion () by which to be engaged with the locking portion () to make contact with the opposite side (), wherein the sliding-contact plate () comprises a first layer () to make contact with the opposite side () and a second layer () laminated on a region of the first layer () leaving uncovered welding portion () so that its surface serves as a sliding-contact surface (), and the first layer () is welded to the main body () at the welding portion (). The locking portion () is a protruding portion located at a central portion of the opposite side () of the main body (), and the engaging portion () is a bore portion by which to be engaged with the protruding portion.