US 11,840,167 B2
Failsafe parking brake manual override
Zachary Edward Sawyer, Alfred, ME (US); and Forrest Joel Tripp, Saco, ME (US)
Assigned to Howe & Howe Inc., Waterboro, ME (US)
Filed by Howe & Howe Inc., Waterboro, ME (US)
Filed on Mar. 5, 2021, as Appl. No. 17/193,055.
Claims priority of provisional application 62/986,143, filed on Mar. 6, 2020.
Prior Publication US 2021/0277970 A1, Sep. 9, 2021
Int. Cl. B60P 1/02 (2006.01); B62D 21/09 (2006.01); B60K 13/02 (2006.01); B60T 7/12 (2006.01); F02M 35/10 (2006.01); F02M 35/104 (2006.01); F16D 65/28 (2006.01); A62C 27/00 (2006.01); A62C 31/00 (2006.01); B60P 3/00 (2006.01); B25J 5/00 (2006.01); B25J 11/00 (2006.01); B62D 55/06 (2006.01); F16D 121/16 (2012.01); B60P 3/16 (2006.01)
CPC B60P 1/02 (2013.01) [A62C 27/00 (2013.01); A62C 31/00 (2013.01); A62C 31/005 (2013.01); B25J 5/005 (2013.01); B25J 11/008 (2013.01); B60K 13/02 (2013.01); B60P 3/00 (2013.01); B60T 7/12 (2013.01); B62D 21/09 (2013.01); B62D 55/06 (2013.01); F02M 35/104 (2013.01); F02M 35/10242 (2013.01); F16D 65/28 (2013.01); B60P 3/16 (2013.01); F16D 2121/16 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An overridable failsafe brake apparatus for a vehicle, the overridable failsafe brake apparatus comprising:
a lever accessible from outside the vehicle, the lever being operable at a first position and a second position;
a brake;
a spring having a first end coupled to the lever and a second end coupled to the brake; and
an actuator that disengages the brake when powered but allows the brake to be engaged when not powered,
wherein the lever disposed in the first position is configured to induce tension in the spring that enables the brake to be activated, and the lever disposed in the second position is configured to reduce tension in the spring to disable the brake from being engaged,
wherein with lever in the first position, a loss of power to the actuator enables the spring to engage the brake, and
wherein with the lever in the second position, a loss of power to the actuator does not enable the spring to engage the brake.