Endless belt power transmission systems or components – Means for adjusting belt tension or for shifting belt,... – With sensor for controlling operation of shifter to correct...
Patent
1990-12-13
1991-12-17
Britts, Ramon S.
Endless belt power transmission systems or components
Means for adjusting belt tension or for shifting belt,...
With sensor for controlling operation of shifter to correct...
474110, F16H 722
Patent
active
050731491
ABSTRACT:
In a fluid tensioner for a camshaft drive belt, a piston rod is sealed by a flexible diaphragm having an enlarged inner end clamped in a conforming groove in the piston rod by a spring clamp. This maintains the inner end of the diaphragm at a fixed position on the piston rod, and provides a labyrinthine seal preventing leakage of fluid. A flattened portion of the piston rod fits a D-shaped opening in a cap to prevent rotation of the piston rod and premature failure of the seal. A dust seal located on the cap also has a D-shaped hole, aligned with the D-shaped hole in the cap, and conforming to the flattened part of the piston rod.
REFERENCES:
patent: 4708696 (1987-11-01), Kimura et al.
patent: 4713044 (1987-12-01), Nakamura et al.
patent: 4790796 (1988-12-01), Okabe et al.
patent: 4798563 (1989-01-01), Okabe et al.
patent: 4904230 (1990-02-01), Kawashima et al.
patent: 4950209 (1990-08-01), Kawashima et al.
Drawing from Japanese Patent laidopen publication 63-145859.
Drawing from Japanese Utility Model laid open publication 63-1954.
Kozakura Nobuto
Maruyama Masao
Nakakubo Katsuya
Okamoto Nobuo
Britts Ramon S.
Schoeppel Roger J.
Tsubakimoto Chain Co.
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