Joints and connections – Structurally installed in diverse art device
Patent
1987-06-10
1989-07-04
Kundrat, Andrew V.
Joints and connections
Structurally installed in diverse art device
403374, 4034091, 256 48, F16B 100
Patent
active
048446467
ABSTRACT:
This invention describes and claims a new clamp member able to be releasably engaged upon a substantially circular (in cross section) shaft (e.g. a post) with a relatively smooth surface. The clamp member includes a collar member with a shaft comprising a longitudinal recess to accommodate the elongate member and at least one integral recess tapered with respect to the longitudinal axis of the elongate member. A wedge member is positioned in the integral recess of the collar member between the inner surface of the collar and the surface of the elongate member. The inner surface of said wedge member is provided with two spaced apart areas of contact with the elongate member which areas of contact have tangent planes which are at an oblique angle one to the other. The outer surface of the wedge member is shaped to substantially correspond with the recess in the collar member, to provide an interface in which the included angle defined by any tangent planes of the recess--wedge interface substantially exceeds the included angle defined by any tangent planes to the elongate member--wedge member interface area. The arrangement of the invention is such that in use, the inner surface of the wedge member is substantially aligned with the surface of the elongate member by movement of the collar member in one direction. The two spaced apart areas of contact on the inner surface of the wedge member are by this movement frictionally engaged on the elongate member. The inner surface of the collar member then moves into frictional engagement with the outer surface of the wedged member to frictionally engage the collar member on the clamp member and elongate member. The clamp member is disengageable from the elongate member by moving the collar member in the opposite direction. Various embodiments are also described and claimed.
REFERENCES:
patent: 443627 (1890-12-01), Nicholson
patent: 1103403 (1914-07-01), Duckworth
patent: 4214793 (1980-07-01), Gargrave
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