US 12,440,720 B2
Exercise device
Willem Johannes van Straaten, Johannesburg (ZA)
Filed by Willem Johannes van Straaten, Johannesburg (ZA)
Filed on Feb. 16, 2024, as Appl. No. 18/444,172.
Application 18/444,172 is a continuation of application No. 17/522,372, filed on Nov. 9, 2021, granted, now 11,904,199.
Application 17/522,372 is a continuation of application No. 17/144,735, filed on Jan. 8, 2021, granted, now 11,198,032.
Application 17/144,735 is a continuation of application No. PCT/US2020/021521, filed on Apr. 6, 2020.
Claims priority of application No. 2020/00975 (ZA), filed on Feb. 17, 2020.
Prior Publication US 2024/0189657 A1, Jun. 13, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A63B 21/00 (2006.01)
CPC A63B 21/4039 (2015.10) [A63B 21/00058 (2013.01); A63B 21/00185 (2013.01); A63B 21/4035 (2015.10); A63B 21/4047 (2015.10); A63B 2208/0252 (2013.01); A63B 2208/0261 (2013.01); A63B 2225/62 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An exercise device comprising:
a first side having a convex surface;
a second side opposing the first side, the second side having a concave surface;
a first rounded end having a first radius;
a second rounded end having a second radius;
a first arc of the first rounded end defined by the first radius;
a second arc of the second rounded end defined by the second radius;
the convex surface of the first side having an arc defined by a third radius;
wherein the first side has a first end and a second end and the first side first end is connected to the first arc and the first side second end is connected to the second arc;
wherein the second side has a first end and a second end and the second side first end is connected to the first arc and the second side second end is connected to the second arc;
wherein the third radius is larger than the second radius;
wherein the third radius of the first side convex surface is greater than the first radius and the second radius; and
wherein the first radius of the first rounded end ranges from about 1.9 to about 2.2 times larger than the second radius of the second rounded end.