Spring devices – Vehicle – Comprising compressible fluid
Patent
1980-09-15
1983-06-07
Butler, Douglas C.
Spring devices
Vehicle
Comprising compressible fluid
188300, 18832216, 248631, 251324, 403331, A47B 910, A47C 330, F16F 944
Patent
active
043867669
ABSTRACT:
A lengthwise adjustable gas spring consists of a housing containing gas under pressure, which is formed by an outer tube 2 and a coaxially disposed inner tube 3 with an annular channel 4 therebetween. A closed piston 5 sealed against the inner tube and axially movable within same, is connected to a piston rod 9, which extends through a seal formed by a plug 10 at one end of the housing. A valve 23 is disposed at the other end of the housing and is used for the regulated connection via the annular channel 4 of two partial housing chambers 20a and 20b disposed on either side of the piston within the inner area of the housing. A valve lifter 22 is embodied within the valve body and is sealed against the valve body and opens or closes gas transfer ports. The valve body 23 and the plug 10 are axially supported against the inner tube 3 and are sealed against the inner surface of the outer tube 2. In order to avoid use of separate seals, the valve body e.g. 23, 23' and/or the plug 10 fit without seals against the inner surface of the outer tube 2 and are radially sealed in relation to it by axial bracing, whereby the valve body 23, 23' and/or the plug 10, on the one hand, and the outer tube 2, and the other hand, consist of materials of differing hardness.
REFERENCES:
patent: 1899846 (1933-02-01), Boyd
patent: 2702099 (1955-02-01), Lautz
patent: 3628637 (1971-12-01), Axthammer
patent: 3656593 (1972-04-01), Bauer
patent: 3711054 (1973-01-01), Bauer
patent: 3999745 (1976-12-01), Mahoff
patent: 4166612 (1979-09-01), Freitag et al.
patent: 4318536 (1982-03-01), Bauer
Bauer Fritz
Bauer Hans J.
Bauer Hans-Peter
Butler Douglas C.
Fritz Bauer & Sohne oHG
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