(19)
(11) EP 4 083 375 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.02.2023 Bulletin 2023/07

(43) Date of publication A2:
02.11.2022 Bulletin 2022/44

(21) Application number: 22169728.7

(22) Date of filing: 25.04.2022
(51) International Patent Classification (IPC): 
F01C 17/06(1968.09)
F04C 18/02(1980.01)
F01C 19/08(1968.09)
 F01C 21/10(1968.09)
F04C 18/067(1980.01)
(52) Cooperative Patent Classification (CPC):
F01C 17/06; F04C 18/067; F04C 18/0215; F04C 18/0284; F01C 21/102; F01C 19/08
(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: 26.04.2021 US 202163179967 P

(60) Divisional application:
22216324.8

(71) Applicant: Dabir Surfaces, Inc.
Chicago, Illinois 60706 (US)

(72) Inventors:
  • NITSA, Anatoliy
    Buffalo Grove, 60089 (US)
  • CHUNG, Terry
    Kildeer, 60047 (US)
  • DZIOBA, David
    Frankenmuth, 48764 (US)

(74) Representative: Specht, Peter et al
Loesenbeck - Specht - Dantz Patent- und Rechtsanwälte Am Zwinger 2
33602 Bielefeld
33602 Bielefeld (DE)

   


(54) CENTER CAMSHAFT SCROLL PUMP


(57) A scroll pump includes a first scroll member having a first involute, a second scroll member scroll member having a second involute, and a camshaft rotatably connected to the first scroll member and to the second scroll member. A link is pivotably connected to the first scroll member and the second scroll member. The first and second scroll members cooperate to define a working volume wherein a working fluid is pressurized during operation of the scroll pump. The second scroll member is configured to equalize pressure across first and second opposed surfaces of an end plate thereof. The second scroll member includes a piston and cavity configured to bias the second scroll member toward the first scroll member in response to pressure across the first and second opposed surfaces of the end plate of the second scroll member.







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