Pipe rack with pivoted fingers and screw conveyors
US3986618A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1975 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | Sep 5, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/15
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A plurality of vertically spaced rows of longitudinally inclined fingers spaced laterally in each row are pivotally supported on transverse horizontal axes near one end. The fingers slope upwardly from the supporting means and also project in the opposite direction from said axes. Vertically movable cam members at the lower ends of the fingers are provided with vertical surfaces that overlie the lower ends of the fingers when the cam members are in their uppermost position. The cam members are movable downwardly step by step by reversible means to cause them to depress the lower ends of the fingers and thereby raise their upper ends. The upper ends of the fingers in the row immediately below the lowest row of raised fingers are positioned to receive a horizontal pipestand lowered onto them. Inclined conveyor screws spaced laterally from the fingers and sloping to the same extent are movable vertically with the cam members. The screws are driven from their lower ends intermittently to convey each successive pipestand step by step downwardly along the fingers supporting it. When a row of fingers has been covered by a row of pipestands, the cam members are moved upwardly far enough to…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.