Vertically moving platform supported on legs
US4437792A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1981 |
| Grant date | Mar 20, 1984 |
| Priority date | — |
| Expiry date | Aug 13, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19679
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A mobile platform with relatively vertically movable legs, of the off-shore drilling platform type, has a plurality of pairs of opposed racks on each leg, with a row of pinions supported in a pinion carrier for each rack. A link for each pinion carrier is pivoted at one end of the pinion carrier and at the other end to the platform and is disposed in the medial plane of the teeth of the double rack. On the opposite side of the leg from one of these double racks is provided structure for detachably interconnecting the lower end of the leg to the platform for vertical swinging movement of the leg when the leg is in raised position, about an axis parallel to that plane, so that the legs can be swung together at their upper ends when in raised position, into a pyramidal configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.