Title (en)

Hydraulic servomotor control assembly

Title (de)

Hydraulisches Aggregat zur Regelung eines Servomotors

Title (fr)

Ensemble hydraulique de régulation d'un servomoteur

Publication

EP 0899464 A3 20000628 (EN)

Application

EP 98116235 A 19980827

Priority

JP 25126797 A 19970901

Abstract (en)

[origin: EP0899464A2] A hydraulic servomotor control assembly is disclosed, for example a hydraulic servomotor control assembly which supplies the pressurized oil as operating fluid to a hydraulic motor 1, and which controls the volume of the pressurized fluid by means of a servo valve 2. In hydraulic servomotors of the prior art, the hydraulic motor and the tachogenerator or rotational speed sensor device for detecting the rotation, are two separate entities, so that the servomotor must be quite large, and it is difficult to find ways to make it any smaller. In contrast to such prior art, the hydraulic servomotor control assembly according to this invention is distinguished by the fact that a hydraulic motor 1 and a rotational speed detector device (13, 17, 20) are shaft coupled and integral with each other, so that the resulting assembly is both compact and stable. <IMAGE>

IPC 1-7

F15B 15/28

IPC 8 full level

F15B 9/14 (2006.01); F15B 13/043 (2006.01); F15B 15/28 (2006.01)

CPC (source: EP)

F15B 9/14 (2013.01); F15B 15/2815 (2013.01)

Citation (search report)

• [X] US 4644749 A 19870224 - SOMES RICHARD K [US]
• [X] US 4258834 A 19810331 - HAWLEY ROYAL T, et al
• [A] EP 0417283 A1 19910320 - KOMATSU MFG CO LTD [JP]
• [A] US 4593555 A 19860610 - KRUTZ GARY W [US], et al
• [A] US 5598794 A 19970204 - HARMS LOUIS C [US], et al
• [A] EP 0791771 A1 19970827 - KOMATSU MFG CO LTD [JP]
• [A] US 4527054 A 19850702 - WHITE HARVEY C [US]
• [A] US 4611549 A 19860916 - KODERA MASANORI [JP], et al
• [A] US 5018351 A 19910528 - OTTE ERHARD [DE]
• [A] EP 0426443 A2 19910508 - SHIMADZU CORP [JP]
• [X] PATENT ABSTRACTS OF JAPAN vol. 017, no. 304 (M - 1427) 10 June 1993 (1993-06-10)

Designated contracting state (EPC)

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

DOCDB simple family (publication)

EP 0899464 A2 19990303; EP 0899464 A3 20000628; CA 2246210 A1 19990301; JP H1182417 A 19990326

DOCDB simple family (application)

EP 98116235 A 19980827; CA 2246210 A 19980831; JP 25126797 A 19970901