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2 015 779

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C1

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IPC

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Application

4915974/27, 1991-03-04

(22)

Actual filing date

1991-03-04

(45)

Published

1994-07-15

(72)

Inventor

Davletshin Eh.Z.Shajkhutdinov R.M.Shajkhutdinova A.R.

(73)

Holder

Kazanskij Gosudarstvennyj Tekhnicheskij Universitet Im.A.N.Tupoleva

METHOD FOR MANUFACTURING COIL SPRINGS Russian patent published in 1994 - IPC

Abstract RU 2015779 C1

FIELD: mechanical engineering. SUBSTANCE: blank cross section is made up by inserting small diameter tubes into large diameter tubes. The ultimate strength of each following tube is larger than that of the previous one. EFFECT: improved characteristics. 5 dwg

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RU 2 015 779 C1

Authors

Davletshin Eh.Z.

Shajkhutdinov R.M.

Shajkhutdinova A.R.

Dates

1994-07-15—Published

1991-03-04—Filed

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