Ball anchor dowel

Details Ball anchor dowel Ball anchor dowel

1975-05-01

1977-05-31

Frazier, Roy D.

85 74, 85 77, F16B 1304

Patent

active

040261840

ABSTRACT:
A ball anchor dowel, arranged to be inserted into and expanded into anchoring contact with a bore hole, is made up of an axially extending shank having a frusto-conical head at its leading end which is inserted first into the bore hole. The trailing end of the shank is threaded. A sleeve formed of a deformable material laterally encloses the shank and for a portion of its length forms a cavity between its inner surface and the shank. The cavity is filled with balls formed of a hard material and it is closed at its ends. By drawing the frusto-conical head rearwardly into the sleeve, the balls deform the sleeve outwardly into anchoring contact with the bore hole.

REFERENCES:
patent: 631765 (1899-08-01), Burk
patent: 677373 (1901-07-01), Rauhoff
patent: 1307418 (1919-06-01), Raeger
patent: 2314445 (1943-03-01), Du Vall
patent: 2319376 (1943-05-01), Wallace
patent: 2872838 (1959-02-01), Vogel
patent: 2950602 (1960-08-01), Lang

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