Spring devices – Vehicle – Comprising compressible fluid
Patent
1982-09-28
1987-01-13
Butler, Douglas C.
Spring devices
Vehicle
Comprising compressible fluid
18832215, 18832216, 18832221, 188376, 267 6428, 267120, 267124, 267129, F16F 500, F16F 900
Patent
active
046359087
ABSTRACT:
A pneumatic spring counterbalance extensible link including a closed end cylinder with an end connector a piston and rod assembly within the cylinder and maintained therein by the crimped over end portion of the cylinder retaining a rod bushing and rod to cylinder seal. The cylinder is pressurized prior to assembly of the complete piston and rod into the cylinder. The piston assembly includes orifice by-pass arrangements either in the piston periphery or in a piston ring, and the piston may include a fail-safe provision in the event the orifice is clogged. A crimping die assembly is used in assembling and completing final assembly of the counterbalance components while simultaneously maintaining the link in a pressurized environment, utilizing sealed arrangement between the crimping dies to maintain pressurization of the interior of the dies and the counterbalance components prior to assembly of the components. A dual force embodiment of the counterbalance unit is disclosed and utilizes a floating sealed piston below the main piston and rod assembly entrapping pre-charged gas in the space between the floating piston and the closed end of the cylinder.
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AVM, Inc.
Butler Douglas C.
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