| 摘要 |
The present disclosure is related to a safety screw (TS) with rotary head comprising a cylinder-shaped rotary head (C), that comprises two openings, a first opening at the base disposed along its longitudinal axis, first (1), second (2), and third (3), wherein the first section (1) has a smaller diameter than that of the second section (2) and wherein the second section (2) has a smaller diameter than that of the third section (3). Likewise, the present invention is further related to a restriction valve system (VR ) comprising the safety screw (TS) above described, together with a valve head (6), which has two openings, a first opening at the base and the second at the upper part thereof, which is mechanically connected to the screw (TS at its upper part; a plunger (8) which is screwed into the thread of the fourth section (4) of the body of the safety screw (T); a valve body (10) that is mechanically connected to the plunger (8) at its lower part for housing the screw therein. |
