US 11,654,816 B2
Multiple use actuation system for vertical rail liftgate
Blake Sessions, Boston, MA (US)
Assigned to Liftwave, Inc., Somerville, MA (US)
Appl. No. 17/442,857
Filed by Liftwave, Inc., Somerville, MA (US)
PCT Filed Mar. 30, 2020, PCT No. PCT/US2020/025808
§ 371(c)(1), (2) Date Sep. 24, 2021,
PCT Pub. No. WO2020/198748, PCT Pub. Date Oct. 1, 2020.
Claims priority of provisional application 62/825,307, filed on Mar. 28, 2019.
Prior Publication US 2022/0185164 A1, Jun. 16, 2022
Int. Cl. B60P 1/44 (2006.01)
CPC B60P 1/4421 (2013.01) [B60P 1/4471 (2013.01); B60P 1/4478 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A liftgate comprising:
a frame;
a runner at least partially nested within the frame, wherein the runner is configured to translate relative to the frame along a vertical axis;
a platform coupled with a first end of the runner, wherein the platform is rotatable relative to the runner about an axis perpendicular to the vertical axis;
a slider coupled to the runner and arranged at least partially within the frame, wherein the slider is configured to translate relative to the runner along the vertical axis;
a transfer link connected between a first end of the slider and a closer link that is coupled to the platform, wherein the closer link is configured to rotate the platform as the slider is translated along the vertical axis;
a mechanical stop coupled to the frame and configured to limit an upward translation of the runner to define an upper bound of travel of the runner; and
a linear actuator connected to a second end of the slider to apply a force to the slider, wherein a first force required to translate the runner relative to the frame is less than a second force required to translate the slider relative to the runner, and wherein the linear actuator is configured to cause translation of the runner until the runner reaches the mechanical stop, and then translation of the slider relative to the runner and rotation of the platform.