| 摘要 |
PCT No. PCT/GB85/00276 Sec. 371 Date Jan. 31, 1986 Sec. 102(e) Date Jan. 31, 1986 PCT Filed Jun. 24, 1985 PCT Pub. No. WO86/00371 PCT Pub. Date Jan. 16, 1986.A mechanical automatic clearance adjuster, such as may be used as a valve clearance adjuster in an internal combustion engine, comprises a self-contained mechanism having an internally screw threaded housing (26) within which there is a complementarily threaded screw member (28). The screw threads exhibit a relatively high friction in one direction of axial loading thereof compared with a relatively low friction in the opposite direction of axial loading whereby the screw member (28) may rotate and advance axially of the housing (26) solely under the action of a compression spring (34) acting between the screw member (28) and an end cap (30).
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