High capacity draft gear

Details High capacity draft gear High capacity draft gear

2005-08-02

2005-08-02

Le, Mark T. (Department: 3617)

Railway draft appliances

Cushioned

Combined spring and friction

C213S043000, C213S024000, C213S035000, C213S041000

Reexamination Certificate

active

06923331

ABSTRACT:
A friction-type draft gear assembly includes a housing having an open front and closed rear portions. A compressible cushioning element is positioned within the rear portion with a seating arrangement abutting one end thereof adjacent the open front portion. A friction cushioning element is provided in the open front portion of the housing. A spring release mechanism is adapted for continuously urging the friction cushioning element outwardly from the compressible cushioning element thereby releasing such friction cushioning element after compression of such draft gear assembly. A compressible cushioning element includes a hydraulic cylinder having a slidable piston to define a high pressure chamber and a low pressure chamber. A metering pin disposed within the piston has aworking portion of a decreased diameter for increasing shock absorbing capacity of such draft gear assembly.

REFERENCES:
patent: 3368698 (1968-02-01), Cardwell
patent: 5529194 (1996-06-01), Merker et al.

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