Copyright © Philip M. Parker, INSEAD. Terms of Use.

| Year | Description |
| 1990 | Invention patented by Howard R. Sommerfeld on December 20th, 1990. Abstract: The present invention discloses a friction-type draft gear assembly including a housing having a front and a rear portion. A compressible cushioning element is positioned within the rear portion with a seating arrangement abutting one end thereof. A friction cushioning element is provided in the front portion of the housing. The assembly further includes a spring release mechanism 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. |
| Source: selected by the editor from original sources. | |
Copyright © Philip M. Parker, INSEAD. Terms of Use.