US 12,447,257 B2
Systems and methods for providing a pulseless peristaltic pump
Nader Nazarifar, Laguna Niguel, CA (US); John C. Dunne, Jr., Costa Mesa, CA (US); Eric N. Anderfaas, Westminster, CA (US); and John Huculak, Mission Viejo, CA (US)
Assigned to Johnson & Johnson Surgical Vision, Inc., Irvine, CA (US)
Filed by Johnson & Johnson Surgical Vision, Inc., Irvine, CA (US)
Filed on Dec. 16, 2020, as Appl. No. 17/124,479.
Claims priority of provisional application 62/949,435, filed on Dec. 17, 2019.
Prior Publication US 2021/0178034 A1, Jun. 17, 2021
Int. Cl. A61M 1/00 (2006.01)
CPC A61M 1/774 (2021.05) [A61M 2205/02 (2013.01); A61M 2205/121 (2013.01); A61M 2205/123 (2013.01); A61M 2210/0612 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system for distributing fluid in a surgical cassette, comprising:
a partially deformable bladder disposed on, and partially in contact with a rigid surface, wherein the bladder forms a channel above a portion of the rigid surface;
a first port and a second port in fluid communication with the channel;
wherein the channel comprises a portion of the bladder having a cross section comprising: first and second bottommost portions in contact with the rigid surface,
a first intermediate portion having a first intermediate portion bottom side located a first distance above the rigid surface,
a second intermediate portion having a second intermediate portion bottom side located the first distance above the rigid surface, and
a top portion located between the first intermediate portion and the second intermediate portion and having a top portion bottom side located a second distance above the rigid surface, wherein
the rigid surface is in the form of a straight line in the cross section and no portion of any of the first intermediate portion, the second intermediate portion and the top portion are located below the straight line; and
wherein at least two pump head rollers are engaged with the at least partially deformable bladder.