US 11,986,205 B2
Pump or rotary cutter for operation in a fluid
Petra Wiessler, Aachen (DE); Sven-René Friedel, Aachen (DE); Reiner Liebing, Aachen (DE); Sami Er, Aachen (DE); and Henning Schlicht, Aachen (DE)
Assigned to ECP ENTWICKLUNGSGESELLSCHAFT MBH, Aachen (DE)
Filed by Ecp Entwicklungsgesellschaft Mbh, Aachen (DE)
Filed on May 5, 2021, as Appl. No. 17/308,094.
Application 17/308,094 is a continuation of application No. 16/532,553, filed on Aug. 6, 2019, granted, now 11,040,187.
Application 16/532,553 is a continuation of application No. 15/873,294, filed on Jan. 17, 2018, granted, now 10,413,646, issued on Sep. 17, 2019.
Application 15/873,294 is a continuation of application No. 14/942,158, filed on Nov. 16, 2015, granted, now 9,907,891, issued on Mar. 6, 2018.
Application 14/942,158 is a continuation of application No. 13/261,423, granted, now 9,217,442, issued on Dec. 22, 2015, previously published as PCT/EP2011/001125, filed on Mar. 2, 2011.
Claims priority of provisional application 61/310,750, filed on Mar. 5, 2010.
Claims priority of application No. 10075103 (EP), filed on Mar. 5, 2010.
Prior Publication US 2021/0346673 A1, Nov. 11, 2021
Int. Cl. A61B 17/3207 (2006.01); A61M 60/178 (2021.01); A61M 60/216 (2021.01); A61M 60/462 (2021.01); F04D 3/00 (2006.01); F04D 29/24 (2006.01); A61M 60/135 (2021.01); A61M 60/148 (2021.01); A61M 60/414 (2021.01)
CPC A61B 17/320725 (2013.01) [A61B 17/320758 (2013.01); A61M 60/178 (2021.01); A61M 60/216 (2021.01); A61M 60/462 (2021.01); F04D 3/00 (2013.01); F04D 29/24 (2013.01); F04D 29/247 (2013.01); A61M 60/135 (2021.01); A61M 60/148 (2021.01); A61M 60/414 (2021.01); A61M 2205/0277 (2013.01); A61M 2205/0288 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A pump for operation in a fluid, the pump comprising:
at least one rotor blade, the at least one rotor blade having a compressed state in which the at least one rotor blade is compressed to a first size and the at least one rotor blade also having an expanded state in which the at least one rotor blade is expanded to a second size, the second size being larger than the first size; wherein the at least one rotor blade comprises at least in part a stiffening portion, wherein in the compressed state the stiffening portion has a first stiffness and in the expanded state the stiffening portion has a second stiffness; and wherein the stiffening portion converts from the first stiffness to the second stiffness when the at least one rotor blade changes between the compressed state and the expanded state.