US 11,872,444 B2
Stair step exercise machine
Shawn Reed, McKees Rocks, PA (US); David Weckerly, Knox, PA (US); and Charles Kennedy, Moon Township, PA (US)
Assigned to Stronger Brands Consulting, LLC, McKees Rocks, PA (US)
Filed by Stronger Brands Consulting, LLC, McKees Rocks, PA (US)
Filed on Jun. 21, 2021, as Appl. No. 17/352,914.
Claims priority of provisional application 63/045,269, filed on Jun. 29, 2020.
Prior Publication US 2021/0402251 A1, Dec. 30, 2021
Int. Cl. A63B 22/04 (2006.01); A63B 21/00 (2006.01); A63B 21/22 (2006.01); A63B 24/00 (2006.01); A63B 21/005 (2006.01); A63B 71/06 (2006.01)
CPC A63B 22/04 (2013.01) [A63B 21/0056 (2013.01); A63B 21/154 (2013.01); A63B 21/225 (2013.01); A63B 21/4035 (2015.10); A63B 24/0087 (2013.01); A63B 2071/0658 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An exercising stair step device comprising;
a stationary frame having a pair of spaced support frame legs;
a pair of upstanding handrails with an interconnecting support rail;
an upper drive shaft and a lower drive shaft supported on respective bearing sets between each support frame leg of the pair of spaced support frame legs;
a pair of upper chain engagement sprockets on opposite ends of the upper drive shaft;
a pair of lower chain engagement sprockets on opposite ends of the lower drive shaft;
a pair of step drive chains, each extending around an upper chain engagement sprocket of the pair of upper chain engagement sprockets and a lower chain engagement sprocket of the pair of lower chain engagement sprockets on respective opposing sides of the upper drive shaft and the lower drive shaft;
a plurality of interconnected step assemblies connected between each step drive chain of the pair of step drive chains;
a flywheel drive shaft and support bearing assembly on and extending between the pair of spaced support frame legs in spaced relation to the upper drive shaft, a weighted flywheel disposed on a first end of the flywheel drive shaft and a flywheel pulley disposed on an opposite end of the flywheel drive shaft;
a drive belt in communication with the flywheel pulley;
a drive belt engagement tensioner assembly on the upper drive shaft; and
a pair of magnetic resistant brake assemblies positionally engageable with the weighted flywheel for selective activation via control input levers disposed on the pair of upstanding handrails.