US 11,938,374 B2
Wrist and forearm strengthening device
Justin Niederman, Medina, MN (US)
Filed by Justin Niederman, Medina, MN (US)
Filed on Feb. 24, 2020, as Appl. No. 16/799,649.
Application 16/799,649 is a continuation of application No. 15/191,336, filed on Jun. 23, 2016, granted, now 10,569,131.
Application 15/191,336 is a continuation of application No. 13/841,782, filed on Mar. 15, 2013, granted, now 9,387,360, issued on Jul. 12, 2016.
Claims priority of provisional application 61/658,252, filed on Jun. 11, 2012.
Prior Publication US 2020/0188731 A1, Jun. 18, 2020
Int. Cl. A63B 23/14 (2006.01); A63B 15/00 (2006.01); A63B 21/00 (2006.01); A63B 21/008 (2006.01); A63B 21/015 (2006.01); A63B 21/06 (2006.01); A63B 23/035 (2006.01); A63B 102/02 (2015.01); A63B 102/14 (2015.01); A63B 102/18 (2015.01); A63B 102/22 (2015.01); A63B 102/32 (2015.01)
CPC A63B 23/14 (2013.01) [A63B 15/00 (2013.01); A63B 21/0004 (2013.01); A63B 21/0005 (2013.01); A63B 21/00069 (2013.01); A63B 21/015 (2013.01); A63B 21/4035 (2015.10); A63B 21/4049 (2015.10); A63B 23/03533 (2013.01); A63B 21/008 (2013.01); A63B 21/0602 (2013.01); A63B 21/0603 (2013.01); A63B 2102/02 (2015.10); A63B 2102/14 (2015.10); A63B 2102/18 (2015.10); A63B 2102/22 (2015.10); A63B 2102/32 (2015.10); A63B 2243/0037 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A wrist strengthening device comprising:
a first handle;
a second handle coupled to the first handle; and
a tightening component in operable cooperation with the first handle and the second handle and configured to provide resistance to movement of the first handle and the second handle as the first handle is moved in a first direction about an axis and the second handle is moved in a second direction about the axis, opposite the first direction, the tightening component comprising an outer piece presenting a first surface, an inner piece presenting a second surface, and a male and a female portion,
wherein the first surface includes a first angled portion having a nonzero and nonorthogonal angle relative to the axis, and wherein the second surface includes a second angled portion having a nonzero and nonorthogonal angle relative to the axis,
wherein the tightening component is configured such that movement of the male portion toward the female portion causes space between the first angled portion and the second angled portion to decrease and friction therebetween to concurrently increase, and
wherein the outer piece is a first outer piece, and further including a second outer piece presenting a third surface, the first and second outer pieces positioned on opposing sides of the inner piece, wherein the third surface includes a third angled portion having a nonzero and nonorthogonal angle relative to the axis, and further wherein the tightening component is configured such that movement of the male portion toward the female portion causes space between the first angled portion and the third angled portion to decrease.