1978-01-19
1980-01-08
Holko, Thomas J.
F16B 1304
Patent
active
041822170
ABSTRACT:
A straddling dowel for securing a threadable element such as a bolt or a screw, comprises a substantially cylindrical body of a plastic material. The body includes a tubular neck portion and an expanding wedge portion which is held outwardly from the neck portion by a plurality of longitudinally extending bending straps connected between the neck portion and the expanding wedge portion. A straddling leg is disposed between adjacent bending straps and extends longitudinally between the neck portion and the wedge portion and it is provided with a wedging surface which faces a similar wedging surface of the wedge portion. When a bolt or a screw is inserted into the neck portion and threaded into the wedge portion, the wedge portion is pulled toward the neck portion to either effect the outward deflection and separation of the straddling legs so that they move outwardly and interengage with the holding material, in the case where the holding material is of a thick construction and consists of a crumbly material, or they bend outwardly during the inward movement of the wedge portion toward the neck portion to form laterally extending holding abutments.
REFERENCES:
patent: 750536 (1904-01-01), Haggerty
patent: 1120412 (1914-12-01), Rohmer
patent: 2148977 (1939-02-01), Buck
patent: 3000254 (1961-09-01), Hottenstein
patent: 3143916 (1964-08-01), Rice
patent: 3313083 (1967-04-01), Flora
patent: 3919917 (1975-11-01), Thorsman
patent: 3974735 (1976-08-01), Berner
Albert Berner
Greigg Edwin E.
Holko Thomas J.
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