(19)

(11)

EP 0 935 718 A2

(12)

(43) Date of publication: 18.08.1999 Bulletin 1999/33 (21) Application number: 97947354.0 (22) Date of filing: 06.11.1997

(51) International Patent Classification (IPC):  B60K( . ) B25G 3/ 20( . ) F16H 1/ 20( . ) B01F 15/ 00( . ) E21B 33/ 00( . ) F16H 57/ 02( . ) (86) International application number: PCT/US1997/020101 (87) International publication number: WO 1998/022301 (28.05.1998 Gazette 1998/21)

(84) Designated Contracting States: BE DE FI FR GB IT NL SE (30) Priority: 07.11.1996 US 19960739739 07.11.1996 US 19960739740 07.11.1996 US 19960739738 (71) Applicant: GENERAL SIGNAL CORPORATION Stamford Connecticut 06904 (US)	(72) Inventors: HUTCHINGS, William, J. Fairport, NY 14450 (US) MARKLE, Stephen, L. Holley, NY 14470 (US) ENGEL, David, J. Springwater, NY 14560 (US) BERG, Joel, S. Hilton, NY 14468 (US) SCHUTTE, Marlin, D. Rochester, NY 14610 (US) (74) Representative: Baillie, Iain Cameron  Ladas & Parry, Dachauerstrasse 37 80335 München 80335 München (DE)