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(11)

EP 3 894 026 A1

(12)

(43) Date of publication: 20.10.2021 Bulletin 2021/42 (21) Application number: 19896085.8 (22) Date of filing: 13.12.2019

(51) International Patent Classification (IPC):  A63B 53/04(2015.01) A63B 53/06(2015.01) A63B 60/02(2015.01) A63B 53/02(2015.01) A63B 53/08(2015.01) A63B 60/04(2015.01) (52) Cooperative Patent Classification (CPC): A63B 53/0466; A63B 2053/0491; A63B 2209/00; A63B 2209/02; A63B 2209/023; A63B 2225/01; A63B 60/02; A63B 60/52; A63B 53/0458; A63B 60/006 (86) International application number: PCT/US2019/066324 (87) International publication number: WO 2020/124001 (18.06.2020 Gazette 2020/25)

(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: 13.12.2018 US 201862779335 P 10.04.2019 US 201916380873 (71) Applicant: Karsten Manufacturing Corporation Phoenix, AZ 85029 (US)	(72) Inventors: MILLEMAN, Travis D. Phoenix, AZ 85029 (US) STOKKE, Ryan M. Phoenix, AZ 85029 (US) MORALES, Eric J. Phoenix, AZ 85029 (US) JERTSON, Martin R. Phoenix, AZ 85029 (US) SHAW, Tyler A. Phoenix, 85029 (US) (74) Representative: Mewburn Ellis LLP  Aurora Building Counterslip Bristol BS1 6BX Bristol BS1 6BX (GB)