US 11,939,968 B2
Pumping system
Matthew G. Morris, Jr., San Diego, CA (US)
Assigned to Altra, Inc., Las Vegas, NV (US)
Filed by Altra, Inc., Las Vegas, NV (US)
Filed on Oct. 5, 2020, as Appl. No. 17/063,233.
Application 17/063,233 is a continuation of application No. 15/632,965, filed on Jun. 26, 2017, granted, now 10,794,376.
Application 15/632,965 is a continuation of application No. 14/105,622, filed on Dec. 13, 2013, granted, now 9,714,650, issued on Jul. 25, 2017.
Claims priority of provisional application 61/833,831, filed on Jun. 11, 2013.
Prior Publication US 2021/0017975 A1, Jan. 21, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. F04B 43/02 (2006.01); A61M 5/142 (2006.01); F04B 43/00 (2006.01)
CPC F04B 43/026 (2013.01) [A61M 5/14224 (2013.01); A61M 5/14228 (2013.01); F04B 43/0054 (2013.01); A61M 2205/12 (2013.01); A61M 2205/128 (2013.01); F04B 43/025 (2013.01); F04B 43/028 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A pumping system comprising:
(a) a disposable cassette comprising:
(i) a body having a sealed top side, an open bottom side, an inlet port disposed on a first end and an outlet port disposed on a second end;
(ii) a first pumping chamber disposed within the open bottom side between a first inlet valve and a first outlet valve;
(iii) a second pumping chamber disposed within the open bottom side between a second inlet valve and a second outlet valve, wherein the first and second pumping chambers are positioned in parallel with each other; and
(iv) a membrane adhered to and sealing the open bottom side defining a fluid path between the inlet port and the outlet port; and
(b) a pumping mechanism comprising:
(i) a chassis configured for removable attachment to the disposable cassette;
(ii) a motor disposed within a length of the chassis and positioned in parallel to the flow path;
(iii) a camshaft disposed adjacent to and in mechanical communication with the motor, wherein the camshaft comprises a plurality of lobes disposed along a length thereof;
(iv) a first finger drive arm hingedly attached to the chassis and positioned parallel to the motor, wherein a bottom portion of the first finger drive arm is in mechanical communication with the camshaft and a top portion of the first finger drive arm has a plate configured to mechanically couple to the membrane;
(v) a second finger drive arm hingedly attached to the chassis and positioned opposing the first finger drive arm, wherein a bottom portion of the second finger drive arm is in mechanical communication with the camshaft, and wherein the first and second finger drive arms are 180° out of phase with each other and a top portion of the second finger drive arm has a plate configured to mechanically couple to the membrane; and
(vi) a plurality of valve arms hingedly attached to the chassis, wherein a lower portion of each valve arm is in mechanical communication with one of the plurality of lobes on the camshaft and an upper portion of each valve arm is configured to respectively actuate each of the first and second inlet valves and the first and second outlet valves,
wherein the membrane is not stretched by the pumping system while in use.