发明名称 Retractable vehicle ramp with lift assist
摘要 A retractable ramp mechanism for a vehicle includes a frame mounted to the vehicle and a ramp mounted to the frame by way of a linkage for movements between stowed and extended positions. The linkage is constructed and arranged to permit an inner end of the ramp to pivot upwardly with respect to the frame from a lower position to an engagement position. In the engagement position, the inner end of the ramp may be engaged with a work surface of the vehicle. The linkage includes a mechanism for applying a biasing force to bias the inner end of the ramp upwardly to the engagement position when the ramp is in the extended position.
申请公布号 US5472306(A) 申请公布日期 1995.12.05
申请号 US19940290239 申请日期 1994.08.15
申请人 OVERHEAD DOOR CORPORATION 发明人 STOLL, DONALD E.;DIETRICH, ALFRED T.
分类号 B60P1/43;(IPC1-7):B60P1/43 主分类号 B60P1/43
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