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:
Jul. 11, 1989
Filed:
Jan. 30, 1987
Junsuke Kyomen, Sakai, JP;
Masayuki Sakaguchi, Sakai, JP;
Hideki Kajiwara, Sakai, JP;
Keiji Matsumoto, Sakai, JP;
Kenzo Nishitani, Sakai, JP;
Yoshinori Kawamura, Amagasaki, JP;
Katsuro Ishihara, Amagasaki, JP;
Masakazu Tanaka, Amagasaki, JP;
Kubota Limited, Osaka, JP;
Abstract
Two plastic tubelike members on which an annular protrusion or an annular groove are respectively provided to be used as two constructive block members for assembling valve or joint devices are directly coupled to assemble such devices. Critical dimensional relationships on the coupling end having the annular groove are established wherein a deformation process can be controlled to engage the annular groove with the annular protrusion by a radially widening motion and an axially spring motion in elastic dynamics, while the coupling end having the annular groove is softened by heating to become elastic. High coupling accuracy can be secured with high coupling strength and durability.