EP 2264319 B1 20170111 - Oil free screw compressor
Title (en)
Oil free screw compressor
Title (de)
Ölfreier Schraubenverdichter
Title (fr)
Compresseur à vis sec
Publication
Application
Priority
JP 2009129389 A 20090528
Abstract (en)
[origin: EP2264319A2] An oil free screw compressor comprises: a pair of male and female screw rotors (1,2) in which two or more twisted teeth are formed; a casing (3) which receives both the rotors (1,2) and in which a suction port and a discharge port are formed; and bearings (11-14) which rotatably support shaft end parts of both the rotors (1,2) and are held in the casing (3). There is provided a slot (6), next to the discharge port of the casing (3), which comes into communication with the discharge port with timing where a volume of a compression chamber formed by both the rotors (1,2) and the casing (3) becomes substantially zero as both the rotors (1,2) rotate, to prevent problems such as excessive compression.
IPC 8 full level
F04C 18/16 (2006.01); F04C 18/08 (2006.01); F04C 29/00 (2006.01); F04C 29/06 (2006.01); F04C 29/12 (2006.01)
CPC (source: EP)
F04C 18/086 (2013.01); F04C 18/088 (2013.01); F04C 18/16 (2013.01); F04C 29/0035 (2013.01); F04C 29/065 (2013.01); F04C 29/068 (2013.01); F04C 29/12 (2013.01); F04C 2250/102 (2013.01)
Citation (examination)
US 2008080997 A1 20080403 - CHIBA KOHTARO [JP], et al
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 SE SI SK SM TR
DOCDB simple family (publication)
EP 2264319 A2 20101222; EP 2264319 A3 20140521; EP 2264319 B1 20170111; CN 101900119 A 20101201; CN 101900119 B 20131030; JP 2010275931 A 20101209; JP 5422260 B2 20140219
DOCDB simple family (application)
EP 10164131 A 20100527; CN 201010185541 A 20100519; JP 2009129389 A 20090528