Title:
負荷を表示する方法および装置
Document Type and Number:
Japanese Patent JP3841438
Kind Code:
B2
Abstract:
The present invention provides an innovative method and apparatus for determining continuous, visual clamp load status during tightening and throughout the life of a fastener. The present invention provides a nondeformable element (or in some cases elements) that is suitably configured and positioned within a fastener to amplify the deformation of the fastener as a load is applied to the fastener. In accordance with one aspect of the invention, a lever is connected at an internal pivot point of a cartridge. One end of the lever rests upon an abutment within the fastener, while the other end serves as an indicator. As the fastener is tightened, the fastener will elongate causing the abutment to move away form the lever end. As the abutment moves, the lever rotates causing the indicator end to move relative to the visual scale which is calibrated to indicate clamping force. If the fastener loses tension, the fastener will contract, thereby forcing the lever to rotate toward its original position. Assembly and calibration of the device requires the simple, inexpensive process of rotating a cartridge.
Inventors:
Waxman, Collies.
Application Number:
JP50609798A
Publication Date:
November 01, 2006
Filing Date:
July 07, 1997
Export Citation:
Assignee:
Ronald C. Clark
Philomena Jay Clark
Philomena Jay Clark
International Classes:
F16B35/00; F16B31/02; G01L5/24
Domestic Patent References:
| JP616416A | ||||
| JP59117906A |
Attorney, Agent or Firm:
Hidesaku Yamamoto