EP 2366905 B1 20141224 - Improved tight multi-stage pump
Title (en)
Improved tight multi-stage pump
Title (de)
Mehrstufige Pumpe
Title (fr)
Pompe multi-étages
Publication
Application
Priority
IT VI20100075 A 20100318
Abstract (en)
[origin: EP2366905A2] The invention is a multi-stage pump (1) comprising an external jacket (2) with a suction port (3) and a delivery port (4), provided at one end with a casing cover (5) and at the opposite end with a lantern bracket (6) supporting an electric motor (7) associated with rotary pumping members (8). The casing cover (5) and the lantern bracket (6) are coupled to the ends of the external jacket (2) through fixing means with the interposition of annular gaskets (17). Each gasket is housed in an annular seat (18) defined by a shaped annular area (19) present in the casing cover (5) and the lantern bracket (6) and by a counter-shaped annular area (20) present in the corresponding end of the external jacket (2), opposing each other. The counter-shaped annular area (20) comprises an annular counteracting surface (20a), inclined with respect to the longitudinal axis (Y) defined by the external jacket (2), suited to compress the annular gasket (17) when the casing cover (5) and the lantern bracket (6) are coupled to the external jacket (2) through the tie rods. The external jacket (2) is provided with a plurality of shaped annular portions (28) suited to make the external jacket (2) elastically yielding along the direction defined by its longitudinal axis (Y) and the fixing means comprise a plurality of tie rods (12) each one of which is provided with a first end (12a) constrained to the casing cover (5) and a second end (12b) constrained to the lantern bracket (6).
IPC 8 full level
F04D 1/06 (2006.01); F04D 13/10 (2006.01); F04D 29/08 (2006.01); F04D 29/62 (2006.01)
CPC (source: EP)
F04D 1/063 (2013.01); F04D 29/086 (2013.01); F04D 29/426 (2013.01); F04D 29/628 (2013.01)
Designated contracting state (EPC)
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
DOCDB simple family (publication)
EP 2366905 A2 20110921; EP 2366905 A3 20121121; EP 2366905 B1 20141224; CN 102192190 A 20110921; CN 102192190 B 20140129; DK 2366905 T3 20150323; HK 1160908 A1 20120817; IT 1398811 B1 20130318; IT VI20100075 A1 20110919
DOCDB simple family (application)
EP 11158552 A 20110316; CN 201110070224 A 20110316; DK 11158552 T 20110316; HK 12101402 A 20120213; IT VI20100075 A 20100318