US 11,786,775 B2
Constant force resistance cable retractor
Keph Sherin, Portland, OR (US)
Filed by Keph Sherin, Portland, OR (US)
Filed on Feb. 6, 2020, as Appl. No. 16/784,128.
Application 16/784,128 is a continuation of application No. 15/881,603, filed on Jan. 26, 2018, granted, now 10,556,143.
Claims priority of provisional application 62/451,602, filed on Jan. 27, 2017.
Prior Publication US 2020/0238123 A1, Jul. 30, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. A63B 21/02 (2006.01); A63B 21/00 (2006.01); A63B 71/00 (2006.01); A63B 71/06 (2006.01)
CPC A63B 21/023 (2013.01) [A63B 21/00061 (2013.01); A63B 21/00065 (2013.01); A63B 21/025 (2013.01); A63B 21/153 (2013.01); A63B 2071/0072 (2013.01); A63B 2071/065 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An apparatus for providing a substantially constant level of resistance, the apparatus comprising:
a first resistance module configured to provide a substantially constant force resistance at a first resistance level, wherein:
the first resistance module includes a first coupling component, a first drum, and a first constant-force spring having the first resistance level;
a first end of the first constant-force spring is connected to the first drum;
a first rear drum, wherein a second end of the first constant-force spring is connected to the first rear drum; and
wherein the first resistance module is configured to couple to a second resistance module via the first coupling component, wherein the first coupling component comprises a set of teeth, the set of teeth configured to couple to a set of holes on the second resistance module.