Abstract: A check valve device for a scroll machine is used to automatically maintain a unique flow direction of the working media. The check device is mounted on the neck of the non-orbiting scroll member of the scroll machine, in which the neck has an axle hole for defining a first passage for flowing the working media. The check valve includes a housing and a valve member. The housing has a through second passage, and couple with the neck in such a manner that a through passage is formed for connecting the first passage of the neck and the second passage of the housing. The valve member is located inside the second passage of the housing, and is formed as a plate with a pivot means to rotate along. While the scroll machine is in stop operation, the valve member is at a close position that the valve member can substantially block the flow of the working media inside the second passage.

Abstract: It is a lubrication device for two-stroke gasoline engine, in which the cylinder is furnished with one to three lubricant outlets; the feature of the lubricant outlets is that the height position of the lubricant outlets is placed just under the bottom piston ring upon the piston reaching the lower dead point, but the location of the lubricant outlet can be placed on the exhaust side, the major thrust side or the minor thrust side.