Device for measuring wrenching height of hexagonal head fastener

Details Device for measuring wrenching height of hexagonal head fastener Device for measuring wrenching height of hexagonal head fastener

1995-06-28

1997-04-15

Bennett, G. Bradley

Geometrical instruments

Distance measuring

Single contact with a work engaging support

33557, G01B 322

Patent

active

056198051

ABSTRACT:
A device for measuring the wrenching height of hexagonal head fasteners has a height indicator having an indicator shaft which extends therefrom. The height indicator is actuable by reciprocal movement. A gaging element housing is coupled to the height indicator and has an interior bore with a longitudinal axis with indicator shaft extending into the interior bore. A gaging ring is fixed to gaging element housing and has a central opening of a size selected as a minimum diameter for receiving a hexagonal head of a fastener to be measured. At least three gaging pins are received within pin holes of the gaging ring. Thin gaging pins reciprocate within the pin holes between an inward and outward position. By positioning the gaging ring over a hexagonal head of the fastener being measured, the gaging pins will engage a washer surface so that they are forced inward, actuating the indicator shaft of the height indicator so that the wrenching height of the hexagonal head fastener is measured.

REFERENCES:
patent: 1266977 (1918-05-01), Nelis
patent: 1643570 (1927-09-01), Bartholdy
patent: 2529988 (1950-11-01), Zempel
patent: 4653191 (1987-03-01), Gasser
patent: 4905378 (1990-03-01), Culver et al.
patent: 4936024 (1990-06-01), Greenslade
patent: 5097423 (1992-03-01), Badinger
patent: 5182866 (1993-02-01), Heymann
ISO 7043-1983 (E)Annex "Gauging of hexagon nut and flange", p. 652.
Abstract of ANSI/ASME B18.6.4 1981, "Hex Washer Head Tapping Screws", pp. H-45 and H-47.

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