Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber
Patent
1988-03-18
1989-03-28
Halvosa, George E. A.
Brakes
Internal-resistance motion retarder
Having a thrust member with a variable volume chamber
295221, 137854, 18832214, 411501, F16F 934
Patent
active
048155764
ABSTRACT:
A twin-tube type shock absorber in which a base valve, a leaf valve and a washer plate are squeezed by a flange portion and a caulked portion of a valve guide. The washer plate has a taper-cut surface of an upper corner of a center hole of the washer plate. When the caulked portion is formed by adding an extremely large axial compression force on the rod portion of the valve guide during construction of the shock absorber, the taper-cut surface prevents the caulking force from being transmitted from the washer plate to the leaf valve and prevents the permanent deformation of the leaf valve due to the caulking force. Thus, stable operation of the leaf valve and stable operation of the shock absorber are assured.
REFERENCES:
patent: 2159289 (1939-05-01), Nickelsen
patent: 2626685 (1953-01-01), Brundrett
patent: 3869956 (1975-03-01), Breer
patent: 3958673 (1976-05-01), Allinquant et al.
patent: 4146118 (1979-03-01), Zankl
patent: 4221041 (1980-09-01), Hufnagel et al.
Patent Abstracts of Japan, vol. 5, No. 147 (M-88) [819], Sep. 17, 1981; & JP-A-56 76 741 (Showa Seisakusho K. K.), Jun. 24, 1981.
Halvosa George E. A.
Toyota Jidosha & Kabushiki Kaisha
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