Spring devices – Vehicle – Comprising compressible fluid
Patent
1988-09-20
1989-08-08
Oberleitner, Robert J.
Spring devices
Vehicle
Comprising compressible fluid
16 66, 267 6428, 277 3, 277 70, F16F 500, F16F 943, E05F 300, F16J 1540
Patent
active
048545546
ABSTRACT:
A transversely mounted, single pneumatic spring, and dual bell crank and idler link assembly providing a compact counterbalance for hinged closures such as automobile trunk lids. Pneumatic spring enhancements, e.g., a multi-output force feature and a pressure decay compensation feature may be incorporated in the spring unit to enhance opening of the lid and to improve life expectancy of the pneumatic spring by minimizing and effectively negating pressure loss due to leakage of gas past the shaft seal. Excess spring cylinder length can provide space or volume zones used for the enhancement features. Structure which provides a multiple output force for the pneumatic spring, utilizes positioning of the spring shaft end bushing and seal to vary the working volume by changing effective cross-section area of the piston shaft near the end of a compression stroke. The extra cylinder length enables a sealed partition wall to separate extra volume and the operative volume part of the cylinder. The extra volume is filled with a supply of gas under higher pressure than that of the spring operative gas pressure and, in conjunction with permeability characteristics of the spring shaft seal and the partition wall seal, enables compensation for leakage from the cylinder. Multiple force output provisions can be used in a substantially vertically disposed spring, filled with a predetermined quantity of oil.
REFERENCES:
patent: 1888578 (1932-11-01), Wallace
patent: 3056598 (1962-10-01), Conway et al.
patent: 3444830 (1969-05-01), Doetsch
patent: 4268018 (1981-05-01), Langanke
patent: 4408751 (1983-10-01), Dodson et al.
patent: 4446895 (1984-05-01), Kato
patent: 4570912 (1986-02-01), Dodson et al.
Maremont Corporation
Oberleitner Robert J.
LandOfFree
Pneumatic spring structure with dual output force and pressure d does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pneumatic spring structure with dual output force and pressure d, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pneumatic spring structure with dual output force and pressure d will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-899976