(19)
(11) EP 0 456 769 A1

(12)

(43) Date of publication:
21.11.1991 Bulletin 1991/47

(21) Application number: 90907623.0

(22) Date of filing: 20.02.1990
(51) International Patent Classification (IPC): 
B66F 9/ 06( . )
B66F 9/ 14( . )
B66F 9/ 075( . )
(86) International application number:
PCT/US1990/000821
(87) International publication number:
WO 1991/008164 (13.06.1991 Gazette 1991/13)
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 04.12.1989 US 19890445214

(71) Applicant: CATERPILLAR INDUSTRIAL INC.
Mentor, Ohio 44060 (US)

(72) Inventors:
  • BLAU, Andrew, P.
    Richmond Heights, OH 44143 (US)
  • GROHSMEYER, Paul, D.
    Dunlap, IL 61525 (US)
  • HARDING, Joseph, J.
    Mentor, OH 44060 (US)
  • KRAHN, Darren, L.
    Mentor, OH 44060 (US)

(74) Representative: Wagner, Karl H. 
WAGNER & GEYER Patentanwälte Gewuerzmuehlstrasse 5
D-80538 München
D-80538 München (DE)

   


(54) APPARATUS AND METHOD FOR CONTROLLABLY POSITIONING FORKS OF A MATERIAL HANDLING VEHICLE