Device for showing tensile stress

Details Device for showing tensile stress Device for showing tensile stress

2007-12-04

2007-12-04

Cygan, Michael (Department: 2855)

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

Reexamination Certificate

active

10527081

ABSTRACT:
In this device for indicating (10) pretensioning forces in a tensioning element (7), such as tie-down straps or tie-down ropes, the spring surrounds the tie bolt (3) which is located on the loop of the tie-down strap, and in response to weak forces describes a path (6) which is easily visible. The combination of two components which differ in shape allows the spring (1) to maintain its shape and spring constant. As a result, the pretensioning force is indicated directly, yet the spring is not subject to an additional load under high tensions but is protected by positive engagement.

REFERENCES:
patent: 5295664 (1994-03-01), Kamper
patent: 6357978 (2002-03-01), Kamper
patent: 0984873 (2001-11-01), None
patent: 2223102 (1992-10-01), None
patent: 2255109 (1992-10-01), None
patent: WO 98 55341 (1998-12-01), None
International Search Report in related application PCT/CH2003/000385, filed Jun. 13, 2003.

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