Invention Grant
- Patent Title: Laminated nut with tension indicator
- Patent Title (中): 带张力指示器的层压螺母
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Application No.: US11706819Application Date: 2007-02-13
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Publication No.: US07789608B2Publication Date: 2010-09-07
- Inventor: Ross S. Hill , Lawrence W. Johnson
- Applicant: Ross S. Hill , Lawrence W. Johnson
- Applicant Address: US IL Glenview
- Assignee: Illinois Tool Works Inc.
- Current Assignee: Illinois Tool Works Inc.
- Current Assignee Address: US IL Glenview
- Agent Mark W. Croll; Paul F. Donovan
- Main IPC: F16B37/08
- IPC: F16B37/08 ; F16B39/12

Abstract:
A laminated nut with a visual indicator indicating if the nut is in a fully tightened state. The nut includes a plurality of conical disc springs enclosed in a cage. In one embodiment, a visual indicator extends axially from the upper surface of the outermost disc spring. In one embodiment, the visual indicator is retracted into the cage when the disc springs flatten as the nut is tightened. In one embodiment, the visual indicator aligns with a reference point on the cage when the nut is fully tightened. In one embodiment, the visual indicator is made more apparent by marking the visual indicator with a contrasting color.
Public/Granted literature
- US20080193249A1 Laminated nut with tension indicator Public/Granted day:2008-08-14
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