| 摘要 |
FIELD: oil and gas industry.SUBSTANCE: sleeve comprises a case and a moving element with superimposed feedthrough openings, a ball actuating the moving element and complete with slotted grooves, a saddle inside the moving element for ball setting and compression spring. Feedthrough openings in the case and the moving element are placed with constant pitch along helical line. Feedthrough slotted grooves are made at the moving element in the area of a saddle. The bottom part of the moving element is complete with a guide pin placed in the track formed at the lower end section of the case, and when the pin moves inside it ensures turning of the moving element in radial direction per the preset angle value.EFFECT: improved reliability of the moving element fixation in the device casing.4 cl, 5 dwg |
