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:
Dec. 23, 1980
Filed:
Nov. 02, 1978
Masahiro Ishigaki, Ibaraki, JP;
Tadayoshi Ohira, Ibaraki, JP;
Kanji Fujita, Takarazuka, JP;
Shin-ichiro Nomura, Takatsuki, JP;
The Toyo Rubber Industry Co., Ltd., Osaka, JP;
Abstract
Flexible expansion joints utilized for coupling conduit pipes or pipelines for conveyance, supply, service and drainage of service water, sewage, industrial water, etc. are provided, which comprise a tubular flexible body portion and two side joint portions. The tubular flexible body portion comprises bias cord reinforcement layer(s) provided circumferentially at a 'cord angle' of 10.degree. to 45.degree.. Alternatively, it may further comprise circumferential cord reinforcement layer(s) circumferentially provided at a 'cord angle' of 0.degree. to 25.degree. inside the bias cord reinforcement, and a plurality of coaxial rigid rings. The flexible expansion joints have good pliability, flexibility, vibration absorbing property, internal and external pressure resistance, durability, anti-deformation property and the like.