Hydraulic damping device

Details Hydraulic damping device Hydraulic damping device

2005-01-11

2005-01-11

Pezzio, Benjamin A (Department: 3683)

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

C188S322130

Reexamination Certificate

active

06840357

ABSTRACT:
Two oil chambers28. 29are formed in a cylinder21.The piston rod oil chamber28is connected with a reservoir50formed on an outer section of the cylinder. Two parallel passages33, 34are formed in a sealing case23provided on an upper section of the cylinder. The sealing case23is provided with a needle valve35regulating the area of the opening of the passage33,a poppet valve37closing the oil chamber34with the biasing force of the spring40and an adjuster39regulating the biasing force of the spring40.A part of the oil flowing out of the oil chamber28in an expansion stroke is discharged through the needle valve35and the puppet valve37in order to allow respective regulation of the damping force at that time.

REFERENCES:
patent: 2710077 (1955-06-01), Fabel et al.
patent: 2780321 (1957-02-01), Sturari
patent: 3351160 (1967-11-01), Koning et al.
patent: 3584712 (1971-06-01), Dickinson
patent: 4139182 (1979-02-01), Nagase et al.
patent: 4673068 (1987-06-01), De Bruijn
patent: 4844428 (1989-07-01), Margolis et al.
patent: 5586627 (1996-12-01), Nezu et al.
patent: 5788030 (1998-08-01), Rottenberger
patent: 6443272 (2002-09-01), Rottenberger et al.
patent: 6619446 (2003-09-01), Rottenberger et al.

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