| 摘要 |
PCT No. PCT/US90/02706 Sec. 371 Date Nov. 13, 1991 Sec. 102(e) Date Nov. 13, 1991 PCT Filed May 15, 1990 PCT Pub. No. WO90/15226 PCT Pub. Date Dec. 13, 1990.A hydraulic tappet is provided with an outer reservoir extending for 360 DEG on two levels, thus causing air bubbles in the oil supplied thereto to remain on the upper level of the outer reservoir. According to a first embodiment of the invention the circulation of the oil on two levels is provided by means of a first insert made of plastic, the support for the lash adjusting components is provided and by a second insert made of metal sheet, the second insert including a web portion which also serves as a boundary for the lower level reservoir. According to another embodiment of the invention, the support for the lash adjusting components is provided by a hub structure extending axially from the tappet body, and a single plastic insert is provided to define, along with the exterior of the hub portion, the two-level reservoir. |
