EP 0457491 A1 19911121 - Gerotor pumps.
Title (en)
Gerotor pumps.
Title (de)
Gerotorpumpen.
Title (fr)
Pompes du type gerotor.
Publication
Application
Priority
GB 9010686 A 19900512
Abstract (en)
A gerotor pump, Figure 1, has the usual male lobed rotor 16 with n lobes meshed in the female lobed annulus 12 with n + 1 lobes, the two being both but relatively rotatable on parallel axes 14,18. The improvement consists of making the lobes helically extending which smooths pressure peaks and reduces noise. <IMAGE>
IPC 1-7
IPC 8 full level
F04C 2/08 (2006.01); F04C 2/10 (2006.01); F04C 2/107 (2006.01); F04C 14/00 (2006.01); F04C 28/20 (2006.01); F04C 29/00 (2006.01); F04C 29/06 (2006.01)
CPC (source: EP)
F04C 2/084 (2013.01); F04C 2/102 (2013.01)
Citation (search report)
- [Y] EP 0301158 A2 19890201 - ATSUGI MOTOR PARTS CO LTD [JP]
- [Y] GB 2022708 A 19791219 - BECK A J
- [A] US 2830542 A 19580415 - ERICKSON WILLIAM F, et al
- [A] GB 2037372 A 19800709 - OS BAD ROZWOJOWY MECH
- [A] US 2397139 A 19460326 - HEATON HERMAN C
- [A] PATENT ABSTRACTS OF JAPAN vol. 4, no. 88 (M-17)(570) 24 June 1980, & JP-A-53 120843 (ANRETSUKTO K.K.) 31 March 1980,
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0457491 A1 19911121; EP 0457491 B1 19940713; AT E108519 T1 19940715; DE 69102818 D1 19940818; DE 69102818 T2 19941124; DK 0457491 T3 19941031; ES 2060302 T3 19941116; FI 103603 B1 19990730; FI 103603 B 19990730; FI 912283 A0 19910510; FI 912283 A 19911113; GB 2243875 A 19911113; GB 2243875 B 19940105; GB 9010686 D0 19900704; GB 9109937 D0 19910703; JP H07151068 A 19950613; NO 176452 B 19941227; NO 176452 C 19950405; NO 911816 D0 19910510; NO 911816 L 19911113
DOCDB simple family (application)
EP 91304154 A 19910508; AT 91304154 T 19910508; DE 69102818 T 19910508; DK 91304154 T 19910508; ES 91304154 T 19910508; FI 912283 A 19910510; GB 9010686 A 19900512; GB 9109937 A 19910508; JP 22822791 A 19910513; NO 911816 A 19910510