Global Patent Index - EP 0812797 A4

EP 0812797 A4 2000-03-15 - BOOM STORING AND EXTENDING DEVICE FOR CRANE

Title (en)

BOOM STORING AND EXTENDING DEVICE FOR CRANE

Title (de)

VORRICHTUNG ZUM STRECKEN UND ZUSAMMENLEGEN EINES KRANAUSLEGERS

Title (fr)

DISPOSITIF DE REPLOIEMENT ET DE DEPLOIEMENT DE FLECHE DESTINE A UNE GRUE

Publication

EP 0812797 A4 (EN)

Application

EP 95910728 A

Priority

JP 9500335 W

Abstract (en)

[origin: EP0812797A1] A device for improving safety during operations of storing or extending a boom of a crane. A corresponding relationship between a boom hoisting angle () and a length of rope (s) is beforehand set when an attitude of a boom (4) shifts from a working attitude (A) to a working attitude (B). Means (14) for detecting a boom hoisting angle detects a current boom hoisting angle (), and means (18) for detecting a current length of rope detects a length of rope (s). On the basis of the current boom hoisting angle detected by the boom hoisting angle detecting means (14), and the current length of rope (s) detected by the rope length detecting means (18), a boom drive device and a winch drive device are drivingly controlled so that a boom hoisting angle and a length of rope are equal to the set boom hoisting angle (p) and a length of rope (sp), respectively. <IMAGE>

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

B66C 23/00; B66C 13/20; B66C 23/26; B66C 23/82; B66C 23/88

IPC 8 full level (invention and additional information)

B66C 23/06 (2006.01); B66C 13/20 (2006.01); B66C 23/82 (2006.01); B66C 23/88 (2006.01)

CPC (invention and additional information)

B66C 23/82 (2013.01); B66C 13/20 (2013.01)

Citation (search report)

  • No further relevant documents disclosed
  • See also references of WO 9626883A1

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 0812797 A1 19971217; EP 0812797 A4 20000315; WO 9626883 A1 19960906

INPADOC legal status


2000-05-03 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 19991001

2000-03-15 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20000131

2000-03-15 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB

2000-03-15 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- Free Format Text: 7B 66C 23/00 A, 7B 66C 23/26 B, 7B 66C 23/82 B, 7B 66C 23/88 B, 7B 66C 13/20 B

1997-12-17 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19970929

1997-12-17 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB