Global Patent Index - EP 1070847 A2

EP 1070847 A2 2001-01-24 - Hydraulic gerotor motor and parking brake

Title (en)

Hydraulic gerotor motor and parking brake

Title (de)

Hydraulischer Gerotor-Motor und Feststellbremse

Title (fr)

Moteur hydraulique avec engrenage intérieur et frein de stationnement

Publication

EP 1070847 A2 (EN)

Application

EP 00115130 A

Priority

US 35900199 A

Abstract (en)

A rotary fluid pressure device having a fluid displacement mechanism (19) and an output shaft (39) rotatable relative to a housing (15,21,41). The device has first and second brake discs (51,53), to brake the rotation of the output shaft. The brake discs are engaged by an actuation piston (59;91) biased by a Belleville washer (85) toward an engaged condition. The actuation piston (59;91) separates a first pressure chamber (73) from a second pressure chamber (75), the washer (85) being disposed in the first pressure chamber (73). When both pressure chamber are drained, the actuation piston is applied by only the washer (85), but when the pressure chamber (73) is pressurized, the actuation piston (59;91) is applied with a substantially greater force, resulting in a greater braking torque. <IMAGE>

IPC 1-7 (main, further and additional classification)

F04C 2/10; F04C 15/00

IPC 8 full level (invention and additional information)

F03C 2/08 (2006.01); F04C 2/10 (2006.01); F04C 15/00 (2006.01); F16D 55/40 (2006.01); F16D 65/18 (2006.01)

CPC (invention and additional information)

F04C 15/0084 (2013.01); F04C 2/104 (2013.01); F04C 15/0057 (2013.01)

Citation (applicant)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1070847 A2 20010124; JP 2001065607 A 20010316; KR 20010066936 A 20010711

INPADOC legal status


2001-02-28 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Date of withdrawal: 20001218

2001-01-24 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-01-24 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Ref Legal Event Code: AX

- Free Format Text: AL;LT;LV;MK;RO;SI