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:
Jun. 06, 2017
Filed:
Nov. 30, 2010
Fumiaki Nakamura, Kariya, JP;
Yoshiaki Takano, Kosai, JP;
Shun Kurata, Kariya, JP;
Takahisa Suzuki, Nagoya, JP;
Takashi Ono, Okazaki, JP;
Hiroki Naganawa, Nishio, JP;
Kinji Ochiai, Kasugai, JP;
Hiroki Ohara, Kariya, JP;
Fumiaki Nakamura, Kariya, JP;
Yoshiaki Takano, Kosai, JP;
Shun Kurata, Kariya, JP;
Takahisa Suzuki, Nagoya, JP;
Takashi Ono, Okazaki, JP;
Hiroki Naganawa, Nishio, JP;
Kinji Ochiai, Kasugai, JP;
Hiroki Ohara, Kariya, JP;
DENSO CORPORATION, Kariya, Aichi-pref., JP;
DENSO AIRS CORPORATION, Anjo, Aichi-pref., JP;
Abstract
A double-wall pipe includes an outer pipe, and an inner pipe disposed inside the outer pipe. An outer wall of the inner pipe has thereon a ridge portion, which defines a groove portion extending in a longitudinal direction of the inner pipe. The outer pipe and the inner pipe are bent to have a straight portion extending straightly, and a bend portion bent from the straight portion. In the straight portion, the outer pipe has an inside diameter that is larger than an outside diameter of an imaginary cylinder defined by an outer surface of the ridge portion of the inner pipe. Furthermore, the ridge portion of the inner pipe contacts an inside surface of the outer pipe to be radially squeezed and held by the outer pipe, in the bend portion. The double-wall pipe can be suitably used for a refrigerant cycle device.