Abstract: A tensioner acting on and allowing an endless transmission belt, stretched between a driving wheel and driven wheels supported on the body of an internal combustion engine, to run under a constant tension, wherein an oscillating lever supports a tension pulley pressed against a loosening side of the transmission belt and has a base end pivoted on the engine body, and an automatic adjuster connected to a tip end of the lever is supported on a case for a hydraulic pump of the engine. A spacer is interposed between contact portions of the oscillating lever and the engine body, and an outlet of the pump and an oil port of the adjuster are directly communicated. An adjusting screw is provided on the tip end of the oscillating lever and is operatively connected to the upper end of a plunger of the automatic adjuster.

Abstract: In an oil supply device of a valve operating system mounted in a cylinder head of an internal combustion engine and operable to open or close intake and exhaust valves, there are juxtaposed an oil supply line for supplying a working oil into a hydraulic tappet of the valve operating system and a lubricating oil line for supplying a lubricating oil to those portions of a valve operating cam shaft which are to be lubricated, and orifice means for controlling the flow rate is provided in each the oil lines. The both oil lines are connected in communication to a main oil passageway upstream of the orifice means, the main oil passageway being connected to a source of a hydraulic oil. Air bleed means is provided in the oil supply line and disposed above the lubricating oil line in the central wall of the cylinder head.

Abstract: A tensioner device for applying a predetermined tension force to a transmission belt extended between a driving wheel and a driven wheel supported on the body of an internal combustion engine, including a hydraulic automatic adjuster which comprises a plunger case fitted in a cylinder bore through a seal member and a plunger slidably and axially movably fitted in the plunger case, open edges of the plunger case and plunger being sealed from outside by means of a flexible boot. An extra feed oil chamber formed within the plunger is in communication with a feed oil source by means of a closed oil path through a feed oil port and in communication with an oil reservoir by means of another closed oil path through an oil discharge port provided in a spaced relation from the feed oil port.