Breakaway coupling device

Abstract

The present invention provides a non-complex, simple to use and economical coupling device or connecting two elements, which provides for disconnection of the two elements when the tension applied to the coupling device exceeds a predetermined load. The coupling device includes an outer and an inner sleeve each having an axial bore. The lower end of the inner sleeve is slidably disposed within the upper end of the outer sleeve and the sleeves are relatively moveable. A frangible elongated member with a predetermined tensile strength connects the outer and inner sleeves through the axial bores. The frangible member breaks under a predetermined amount of stress thereby allowing the outer and inner sleeves of the coupling device to separate and disconnecting the attached elements. One or more internal longitudinal passages through the outer and inner sleeves adjacent to the axial bores allow passage of wire cables, gases, fluids or mechanical linkages through the coupler. A plurality of o-ring seals may be positioned between the lower end of the inner sleeve and the upper end of the outer sleeve whereby the internal passages of the coupler are pressure sealed from moisture and external contaminates.