Global patent index - EP 1069817 A1

EP 1069817 A1 2001-01-24 - SELF-LEVELLING MOBILE SUPPORTING CHASSIS

Title (en)

SELF-LEVELLING MOBILE SUPPORTING CHASSIS

Title (de)

SELBSTNIVELLIERENDER MOBILER TRÄGER

Title (fr)

ELEVATEUR A NACELLE MOBILE

Publication

EP 1069817 A1 (EN)

Application

EP 98960917 A

Priority

  • AU 9801060 W
  • AU 4852897 A
  • AU 4852997 A

Abstract (en)

[origin: WO9931962A1] A work platform-supporting device is held by legs extendable by hydraulic rams and retractable by its own weight. A sensing device including a pendulum (43) attached by a stem (45) to a universal joint (46) controls the movement of the rams. Two pairs of control valves located at 90 DEG to each other are attached to the stem (45). One pair of control valves reacts to the pitch of the platform while the other pair reacts to the roll of the platform. These valves are attached to a hinge mechanism, which is connected to the stem by a ball joint (67). When the sensing device and the platform are level the valves are in a neutral position. When the platform becomes inclined the pendulum moves to a vertical position thus activating the valves. The valves allow hydraulic fluid to flow into the ram on the downhill side of the platform and the ram on the uphill side retracts allowing hydraulic fluid to return to the hydraulic fluid reservoir. The valves have built-in dampers and the pendulum is immersed in a viscous fluid (42).

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

A01D 46/20; A01D 46/24; B60G 17/01; G05D 16/02

IPC 8 full level (invention and additional information)

B60G 17/019 (2006.01)

CPC (invention and additional information)

B60G 17/01908 (2013.01); B60G 2200/13 (2013.01); B60G 2202/413 (2013.01); B60G 2300/06 (2013.01); B60G 2400/0511 (2013.01); B60G 2400/0512 (2013.01); B60G 2400/95 (2013.01); B60G 2800/019 (2013.01); B60G 2800/20 (2013.01)

Designated contracting state (EPC)

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

EPO simple patent family

WO 9931962 A1 19990701; AU 1652499 A 19990712; AU 734327 B2 20010607; EP 1069817 A1 20010124; EP 1069817 A4 20030528; IL 136896 D0 20010614; NZ 501450 A 20000929

INPADOC legal status

2005-03-09 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20040701

2003-05-28 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20030411

2003-05-28 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- IPC: 7A 01D 46/20 A

2003-05-28 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- IPC: 7A 01D 46/24 B

2003-05-28 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- IPC: 7B 60G 17/01 B

2003-05-28 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- IPC: 7G 05D 16/02 B

2003-05-28 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- IPC: 7B 66F 11/04 B

2001-01-24 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001005

2001-01-24 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE