Patent SG-11201807797R-A (SG)
Title: Pressure control gaskets for operating pump cassette membranes
Inventor: OVERSON JASON
IPC: A61M1/28
Filed: 2017-03-17
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property -, Organization MD 1111101110101011111 HO 11111 0111011110110111 OM HIDE ill OEN International Bureau 0.. .... .. ..... ..or::,,, (10) International Publication Number (43) International Publication Date WO 2017/161319 Al 21 September 2017 (21.09.2017) WIP0 I PCT (51) International Patent Classification: (81) Designated States (unless otherwise indicated, for every A61M 1/28 (2006.01) F16J 15/00 (2006.01) kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, (21) International Application Number: BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, PCT/US2017/023046 DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, (22) International Filing Date: HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, 17 March 2017 (17.03.2017) KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, (25) Filing Language: English NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, (26) Publication Language: English RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, (30) Priority Data: ZA, ZM, ZW. 62/310,361 18 March 2016 (18.03.2016) US (84) Designated States (unless otherwise indicated, for every (71) Applicant: DEKA PRODUCTS LIMITED PARTNER- kind of regional protection available): ARIPO (BW, GH, SHIP [US/US]; 340 Commercial Street, Manchester, NH GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, 03101-1129 (US). TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, (72) Inventors: OVERSON, Jason, M.; 12 English Village DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, Road, Unit#103R, Manchester, NH 03102 (US). KAROL, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, Daniel, S.; 27 Lynbrook Road, Southborough, MA 01772 SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, (US). SCARPACI, Jacob, W.; 162 North Adams Street, GW, KM, ML, MR, NE, SN, TD, TG). — Manchesetr, NH 03104 (US). MANNISTO, John, F.; 265 Village Circle Way, Apt. #25, Manchester, NH 03102 Declarations under Rule 4.17: (US). — of inventorship (Rule 4.17(iv)) (74) Agent: GORAYEB, Marc, J.; DEKA Research & Devel- Published: opment Corp., 340 Commercial Street, Manchester, NH = 03101-1129 (US). — with international search report (Art. 21(3)) = = = (54) Title: PRESSURE CONTROL GASKETS FOR OPERATING PUMP CASSETTE MEMBRANES = = = il tig_kuumn M ma. = i .... 196 = = = _ = a 183 402 III 196 184 183 15 402 ' l' lk 1 if , 1 ka — m. _ INIMIINIMINI 111111M. 1495 1491 1495 Millnai 11111111111111111111111141 1491 1481 — 1_493 148 ,-1 FIG. 17B 148 .4 C:r 11 M (57) : A pump cassette comprising an outer flexible membrane covering flowpaths, valve chambers and pump chambers of 1-1 the cassette is designed to be actuated by a control gasket on a base unit arranged to move designated valve and pump portions of the cassette membrane. The performance of a cassette valve may improved by optimizing the configuration of the valve control region of 1-1 ---- the control gasket overlying the cassette valve. This may improve both fluid flow through the valve and reduce the amount of vibrat - IN ory noise associated with opening the valve. The gasket valve control or actuation region is at least partially bounded by a vacuum C channel facing the outside of the gasket so that a constant vacuum can be applied between the gasket valve control or actuation re- el gion and the adjacent portion of the cassette membrane. An improved version of the vacuum channel comprises a flexible inner wall 0 (contiguous with the valve control region) so that the inner wall flexes or partially collapses away from the cassette valve seat, while ,-t still maintaining patency of the vacuum channel during the application of negative pressure on the gasket valve actuation region to open the cassette valve.