Endless belt power transmission systems or components – Means for adjusting belt tension or for shifting belt,... – Tension adjuster or shifter driven by electrical or fluid motor
Patent
1995-06-01
1997-06-10
Schoeppel, Roger J.
Endless belt power transmission systems or components
Means for adjusting belt tension or for shifting belt,...
Tension adjuster or shifter driven by electrical or fluid motor
474136, F16H 708
Patent
active
056370474
ABSTRACT:
There is described a hydraulic tensioner (1, 101) for endless transmission elements, in particular a chain tensioner for internal combustion engines. The tensioner includes a housing (2, 102), a pressure chamber (3, 103) arranged in the housing, a piston (4, 104) which is movable in the pressure chamber (3, 103), a hydraulic fluid supply to the pressure chamber (3, 103), a check valve (20, 120) which is arranged within the hydraulic fluid supply and is acted upon by pressure in the pressure chamber (3, 103), and a means (11, 111) for automatically reducing the pressure in the pressure chamber (3, 103). To provide such a tensioner with a pressure-relief valve (11, 112) for automatically reducing pressure in the pressure chamber (3, 103), i.e., in a manner which is simple under constructional and technical manufacturing aspects and also reliable, the check valve (20, 120) should be connected to the valve member (12, 122) of the pressure-relief valve (11, 111).
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Joh. Winklhofer & Soehne GmbH & Co. KG
Schoeppel Roger J.
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