Cylinder and piston device and a method for the assembling there

Details Cylinder and piston device and a method for the assembling there Cylinder and piston device and a method for the assembling there

1980-06-11

1981-12-29

Butler, Douglas C.

Spring devices

Vehicle

Comprising compressible fluid

267124, 188297, F16F 918, F16F 934

Patent

active

043078737

ABSTRACT:
In the illustrative embodiments described, a cylinder-piston device such as a gas spring includes a novel piston rod-piston unit assembly which embodies a snap-on type construction for facilitating the connection and disconnection of the piston unit to and from the piston rod. Resilient tongue members carried by the piston unit are formed with detent-like abutment members at their free ends, which abutment members snap behind an engagement shoulder, formed for example by a disc or groove, on the piston rod to hold the piston unit on the rod. The free ends of the tongue members are also formed with bevelled surfaces which coact with the piston rod to cam the tongue members radially outward as the piston unit is urged onto the piston rod, so that the abutment members are first displaced away from and then snap behind the abutment shoulder. Once the piston rod-piston unit assembly is in place within the cylinder, the inner surface of the cylinder prevents the tongue members from deflecting outward enough for the abutment members to be free of the abutment shoulder. The piston unit may be slidably on the piston rod between two axial terminal positions at which the piston unit and rod together define two different damping flow cross sections.

REFERENCES:
patent: 3311199 (1965-10-01), Kiefer
patent: 3937450 (1976-02-01), Bauer
patent: 4089512 (1978-05-01), Allinquant et al.
patent: 4240619 (1980-12-01), Wirges et al.

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