(19)

(11)

EP 4 028 137 A1

(12)

(43) Date of publication: 20.07.2022 Bulletin 2022/29 (21) Application number: 20864005.2 (22) Date of filing: 14.09.2020

(51) International Patent Classification (IPC):  A63B 53/00(2015.01) A63B 53/06(2015.01) A63B 53/04(2015.01) A63B 53/08(2015.01) (52) Cooperative Patent Classification (CPC): A63B 60/42; A63B 2209/02; A63B 53/0437; A63B 53/045; A63B 53/0462; A63B 53/0466 (86) International application number: PCT/US2020/050769 (87) International publication number: WO 2021/051102 (18.03.2021 Gazette 2021/11)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 13.09.2019 US 201962900318 P (71) Applicant: Karsten Manufacturing Corporation Phoenix, AZ 85029 (US)	(72) Inventors: MORALES, Eric J. Phoenix, Arizona 85029 (US) POPE, Jeremy S. Phoenix, Arizona 85029 (US) NUTTALL, Thomas J. Phoenix, Arizona 85029 (US) (74) Representative: Tombling, Adrian George  Withers & Rogers LLP 2 London Bridge London SE1 9RA London SE1 9RA (GB)