US 12,077,015 B2
Torsion axle assembly
James L. Granger, Safety Harbor, FL (US); and Alex G. Hessler, St. Petersburg, FL (US)
Assigned to TRIBOLOGY INNOVATIONS, LLC, Safety Harbor, FL (US)
Filed by TRIBOLOGY INNOVATIONS, LLC, Safety Harbor, FL (US)
Filed on Aug. 19, 2021, as Appl. No. 17/406,291.
Claims priority of provisional application 63/067,624, filed on Aug. 19, 2020.
Prior Publication US 2022/0055404 A1, Feb. 24, 2022
Int. Cl. B60B 35/06 (2006.01); B60B 35/02 (2006.01)
CPC B60B 35/06 (2013.01) [B60B 35/02 (2013.01); B60B 2310/204 (2013.01); B60B 2310/3025 (2013.01); B60B 2310/306 (2013.01); B60B 2310/318 (2013.01); B60B 2310/616 (2013.01); B60B 2360/102 (2013.01); B60B 2360/50 (2013.01); B60B 2900/141 (2013.01); B60B 2900/212 (2013.01); B60B 2900/321 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A torsion axle assembly comprising (I) a spindle having a conical portion, (II) a torsion bar, (III) a cartridge, and (IV) a torsion arm, wherein:
(a) the torsion bar comprises a tip and a first set of splines residing on the tip;
(b) the cartridge is disposed about a portion of the torsion bar, wherein the torsion bar tip extends outward from a first end of the cartridge;
(c) the torsion arm comprises a spindle socket and a torsion bar socket, wherein
(i) the torsion bar socket comprises a second set of splines formed on an interior surface of the torsion bar socket,
(ii) the torsion bar tip extends into the torsion bar socket such that the first set of splines mates to the second set of splines,
(iii) the spindle extends into the spindle socket, and the spindle conical portion frictionally engages an interior surface of the spindle socket, wherein the spindle comprises (A) a first stepped portion and a second stepped portion, and (B) a fusible link between the first stepped portion and the second stepped portion,
(iv) the fusible link is configured to sever thereby separating the first stepped portion from the second stepped portion when both (A) a force is applied to the first stepped portion or the second stepped portion, and (B) the applied force exceeds a predetermined force threshold value; and wherein
(d) the spindle, torsion bar, and torsion arm each further comprise a protective coating.