Global Patent Index - EP 1340913 B1

EP 1340913 B1 20070905 - Gear pump

Title (en)

Gear pump

Title (de)

Zahnradmaschine

Title (fr)

Pompe à engrenages

Publication

EP 1340913 B1 20070905 (DE)

Application

EP 03003179 A 20030219

Priority

DE 10208408 A 20020227

Abstract (en)

[origin: EP1340913A2] The gear teeth of the annular gear machine are formed from gear points (4k,3k) and gear roots (4f,3f) formed from curves of the second or higher order, whereby the curves on their ends point tangentially to one another, and at least the curves which form the tooth points, or at least the curves which form the tooth roots, are cycloids. One of the tooth profile contours formed by the curves is gradually differentiable, and preferably twice differentiable by piece. An Independent claim is included for a gear set for an annular gear machine such as a pump or motor.

IPC 8 full level

F04C 2/10 (2006.01); F04C 2/08 (2006.01); F16H 55/08 (2006.01)

CPC (source: EP US)

F04C 2/084 (2013.01 - EP US); F04C 2/088 (2013.01 - EP US); F04C 2/102 (2013.01 - EP US)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR

DOCDB simple family (publication)

EP 1340913 A2 20030903; EP 1340913 A3 20040728; EP 1340913 B1 20070905; AT E372462 T1 20070915; DE 10208408 A1 20030911; DE 50308093 D1 20071018; ES 2292867 T3 20080316; JP 2003254409 A 20030910; JP 4155841 B2 20080924; US 2004009085 A1 20040115; US 7427192 B2 20080923

DOCDB simple family (application)

EP 03003179 A 20030219; AT 03003179 T 20030219; DE 10208408 A 20020227; DE 50308093 T 20030219; ES 03003179 T 20030219; JP 2003050158 A 20030226; US 37559003 A 20030227