Land vehicles – Wheeled – Attachment
Patent
1977-04-18
1978-05-16
Song, Robert R.
Land vehicles
Wheeled
Attachment
182 77, B60r 302
Patent
active
040895386
ABSTRACT:
Disclosed are lowerable step assemblies as an accessory confined between the upright hinged-edge and free-edge of a door, and especially adapted for a motor vehicle door. The step assembly includes a step-on tread pivotably associated with the lower portion of a vertical rail guided by a track means aptly mounted at the door interior side, has an operative lower-station wherein the tread is horizontal and located in elevation between the opened door bottom-edge and an underlying substrate, and also has a stowed upper-station wherein the pivotal tread has automatically assumed vertical and parallel relationship to the closed door above the bottom-edge. Other especially noteworthy features include handle means for raising the assembly from lower-station to upper-station, releaseable holding means for maintaining the rail and tread at upper-station until released for gravitational attainment of lower-station, upperstop means for determining the tread elevation at lower-station, specially combined rails and tracks therefor, and sophisticated mounting means to facilitate installation onto the door style encountered.
REFERENCES:
patent: 2324507 (1943-07-01), Johnson
patent: 2581488 (1952-01-01), Keltner
patent: 3136386 (1964-06-01), Horvath
Nimmer George R.
Song Robert R.
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