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:
Oct. 02, 1979
Filed:
Jan. 24, 1977
Jury S Starostin, Kuibyshev, SU;
Veniamin K Erokhov, Kuibyshev, SU;
Mikhail F Golovinov, Kuibyshev, SU;
Antonina I Berdjugina, Kuibyshev, SU;
Viktor I Plokhov, Kuibyshev, SU;
Lev P Kirillov, Kuibyshev, SU;
Anatoly A Saprykin, Moscow, SU;
Vladimir N Krotkov, Moscow, SU;
Anna N Sergeeva, Moscow, SU;
Evgeny D Konovalenko, Melitopol Zaporozhskoi oblasti, SU;
Other;
Abstract
A needle comprising a cylindrical portion, a portion with longitudinal profiled channels intended to form the internal fins of a pipe, said portions being spaced apart lengthwise the needle and an intermediate portion joining the first two portions and varying in diameter which first decreases then increases in the direction from the cylindrical portion to the portion with profiled channels. The portion with profiled channels has the form of a truncated cone whose smaller base is directed towards the cylindrical portion. The needle according to the invention is used for pressing pipes with internal fins whose height exceeds their thickness by more than 4 times.