| 摘要 |
<p>The invention relates to a cock that is used to control the flow of a pressurised fluid, in particular a medical or industrial gas. The inventive cock consists of: a body (1) with an internal fluid distribution circuit (3, 31, 32) comprising an internal fluid passage which fluidically connects a fluid inlet (31) with a fluid outlet (32); means for controlling the fluid flow (4) that can be used to enable or prevent the circulation of fluid in said passage (3); and handling means which are provided with a pivoting lever that is actuated manually by an operator and which co-operate, directly or indirectly, with the fluid flow control means (4). The pin lever (2) (YY) pivots around a pivot point (XX) and can move between at least three stable positions which are angularly staggered in relation to each other. In the rest position, said lever (2) is fixed and solidly connected to the body (1) of the cock and there is zero fluid flow in the internal passage. In the intermediary released position, the axis (YY) of the lever is disposed at a positive non-zero angle alpha in relation to axis YY of the lever (2) in the rest position, said lever (2) being disconnected from the body (1), and the fluid flow is still zero. In the active position, axis YY of the lever (2) is disposed at a positive non-zero angle beta in relation to axis YY of the lever (2) in the intermediary released position, said lever (2) being disconnected from the body (1), and fluid is flowing through the internal passage at a non-zero flow rate. The invention also relates to a gas cylinder equipped with one such cock.</p> |
