Title:
【発明の名称】ねじ又はねじ締付け用のナットもしくはワッシャの形態をした連結部材及びそのねじ締付け方法
Document Type and Number:
Japanese Patent JP2003527544
Kind Code:
A
Abstract:
A connecting element in the form of a screw or bolt, nut or washer for a screw connection has at its bearing surface at least one projection and at least one radially further outwardly disposed surface region. The height and cross-section of the projection are so dimensioned that on tightening of the screw connection the projection is elastically or plastically deformed to such an extent that on reaching a predetermined prestress force the radially outwardly disposed area region comes into engagement. When the screw connection, usual in practice, is tightened up to a predetermined tightening torque, the invention reduces the tolerance range of the prestress force corresponding to the tightening torque. The change in the torque vs. rotational angle differential quotient which occurs when the projection has been sufficiently deformed for the radially outwardly disposed area region to come into engagement may also be employed as criterion for terminating the tightening operation.
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Inventors:
Volker Shatz
Application Number:
JP2001553542A
Publication Date:
September 16, 2003
Filing Date:
January 17, 2001
Export Citation:
Assignee:
Schatz Akchengezel Shaft
International Classes:
B25B23/14; F16B31/02; F16B39/282; F16B43/00; G01L5/24; (IPC1-7): F16B31/02; B25B23/14; F16B43/00
Attorney, Agent or Firm:
Aoyama Ryo (2 outside people)