(19)
(11) EP 1 258 564 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.09.2003 Bulletin 2003/37

(43) Date of publication A2:
20.11.2002 Bulletin 2002/47

(21) Application number: 02005497.9

(22) Date of filing: 11.03.2002
(51) International Patent Classification (IPC)7: E01C 19/40
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 14.05.2001 US 854823

(71) Applicant: Caterpillar Inc.
Peoria Illinois 61629-6490 (US)

(72) Inventors:
  • Feucht, Timothy A., c/o Caterpillar Inc.
    Peoria, Illinois 61629-6490 (US)
  • Graham, Evan T., c/o Caterpillar Inc.
    Peoria, Illinois 61629-6490 (US)
  • Gutzwiller, Timothy M., c/o Caterpillar Inc.
    Peoria, Illinois 61629-6490 (US)

(74) Representative: Wagner, Karl H., Dipl.-Ing. 
WAGNER & GEYER Patentanwälte Gewürzmühlstrasse 5
80538 München
80538 München (DE)

   


(54) Automatic tamping mechanism control


(57) A control system for use with an asphalt paving machine receives inputs from an operator interface for inputting a desired tamping frequency or a desired tamping rate (tamps/ft) and a speed sensor that produces a signal indicative of the speed of the asphalt payer. The control system includes an automatic mode and when in automatic mode the system modifies the tamping frequency to better achieve a desired number of tamps per foot traveled irrespective of speed.






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