US 12,391,530 B2
Actuator failure detection and scissor lift loadsensing systems and methods
David Lombardo, Oshkosh, WI (US); Eko Prasetiawan, Oshkosh, WI (US); and Louis Bafile, Oshkosh, WI (US)
Assigned to OSHKOSH CORPORATION, Oshkosh, WI (US)
Filed by Oshkosh Corporation, Oshkosh, WI (US)
Filed on Oct. 13, 2023, as Appl. No. 18/379,945.
Application 18/379,945 is a continuation of application No. 17/328,885, filed on May 24, 2021, granted, now 11,820,631.
Application 17/328,885 is a continuation in part of application No. 16/811,659, filed on Mar. 6, 2020, granted, now 11,148,922.
Application 17/328,885 is a continuation in part of application No. 16/811,196, filed on Mar. 6, 2020, granted, now 11,014,796.
Claims priority of provisional application 62/829,853, filed on Apr. 5, 2019.
Claims priority of provisional application 62/829,837, filed on Apr. 5, 2019.
Prior Publication US 2024/0034608 A1, Feb. 1, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B66F 17/00 (2006.01); B66F 11/04 (2006.01); F16H 25/20 (2006.01); F16H 25/22 (2006.01); F16H 25/24 (2006.01)
CPC B66F 17/006 (2013.01) [B66F 11/042 (2013.01); F16H 2025/2081 (2013.01); F16H 25/2204 (2013.01); F16H 25/2472 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A fully-electric lift device, comprising:
a base having a plurality of wheels;
a retractable lift mechanism having a first end coupled to the base and being moveable between an extended position and a retracted position;
a work platform configured to support a load, the work platform coupled to and supported by a second end of the retractable lift mechanism;
an electric linear actuator configured to selectively move the retractable lift mechanism between the extended position and the retracted position, the electric linear actuator including an electric motor; and
a controller in communication with the electric motor and configured to:
receive a lift command;
monitor a required torque for the electric motor based on the lift command;
monitor a required drive power efficiency associated with the electric linear actuator; and
selectively inhibit the lift command based on the at least one of the required torque or the required drive power efficiency.