Breakaway coupling
First Claim
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1. A breakaway coupling for the emergency separation of two lines, comprising:
- a first coupling half having a support member and a first housing that forms a first line end with a first self-closing fluid barrier, the first housing having a first end flange or collar provided with a first oblique surface, the support member extending around the first housing and forming pivot points;
a second coupling half having a second housing that forms a second line end with a second self-closing fluid barrier, the second housing having a second end flange or collar provided with a second oblique surface; and
two or more levers, which are mounted on the first coupling half with the pivot points supporting the levers and defining a longer lever arm and a shorter lever arm on each lever, wherein each longer lever arm is pivoted radially outward by a compression spring and the shorter lever arm is pivoted radially inward;
wherein each shorter lever arm, has a catch piece that engages on the first and second oblique surfaces in a coupled condition, andwherein, in case of an emergency defined by an excessively great pulling force on the coupling halves, the levers pivot around their pivot points and release the catch pieces from the first and second oblique surfaces.
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Abstract
There is provided a breakaway coupling between two lines. The first coupling half possesses an opened jaw, which is formed by catch pieces of the short lever arms of dual-arm catch levers, which are pre-stressed in the closing direction by compression springs, and in this way engage behind oblique surfaces of an end flange of the second coupling half. When a predetermined pulling force on the lines is exceeded, the breakaway coupling disengages.
13 Citations
12 Claims
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1. A breakaway coupling for the emergency separation of two lines, comprising:
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a first coupling half having a support member and a first housing that forms a first line end with a first self-closing fluid barrier, the first housing having a first end flange or collar provided with a first oblique surface, the support member extending around the first housing and forming pivot points; a second coupling half having a second housing that forms a second line end with a second self-closing fluid barrier, the second housing having a second end flange or collar provided with a second oblique surface; and two or more levers, which are mounted on the first coupling half with the pivot points supporting the levers and defining a longer lever arm and a shorter lever arm on each lever, wherein each longer lever arm is pivoted radially outward by a compression spring and the shorter lever arm is pivoted radially inward; wherein each shorter lever arm, has a catch piece that engages on the first and second oblique surfaces in a coupled condition, and wherein, in case of an emergency defined by an excessively great pulling force on the coupling halves, the levers pivot around their pivot points and release the catch pieces from the first and second oblique surfaces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification