Pneumatic strut for a motor vehicle with an adjustable limit pos

Details Pneumatic strut for a motor vehicle with an adjustable limit pos Pneumatic strut for a motor vehicle with an adjustable limit pos

1996-12-20

1998-11-24

Oberleitner, Robert J.

Spring devices

Vehicle

Comprising compressible fluid

188300, F16F 944, F16F 902

Patent

active

058397191

ABSTRACT:
A pneumatic strut for use as an opening power assist mechanism for a motor vehicle tailgate has a piston rod extending from a piston contained within a cylinder. The piston separates the cylinder into two work chambers, each containing a gas charge under pressure. A bypass opening is active to connect the work chambers during the initial opening displacement of the tailgate to automatically open the tailgate through a first opening angle range. A second valve can be externally actuated to connect the two work chambers to further selectively open the tailgate into a second opening angle range. To close the tailgate, a third, directionally dependent valve can automatically connect the two work chambers during the closing displacement of the tailgate.

REFERENCES:
patent: 3985190 (1976-10-01), Kammerer et al.
patent: 4066279 (1978-01-01), Kaptanis
patent: 4156523 (1979-05-01), Bauer
patent: 4307875 (1981-12-01), Schnitzius et al.
patent: 4433759 (1984-02-01), Ichinose
patent: 4595182 (1986-06-01), Freitag et al.
patent: 4989698 (1991-02-01), Dony
patent: 5097928 (1992-03-01), Enders
patent: 5435529 (1995-07-01), Day et al.
patent: 5538115 (1996-07-01), Koch
patent: 5553690 (1996-09-01), Takahashi

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