Single-line clamshell bucket
US5443294A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1993 |
| Grant date | Aug 22, 1995 |
| Priority date | — |
| Expiry date | Sep 22, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S294/905
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A single-line clamshell bucket is provided comprising an upper sheave housing and an upper sheave assembly connected to the upper sheave housing. The bucket also comprises a lower sheave assembly vertically aligned beneath the upper sheave assembly in a manner such that a cable reeved between the lower sheave assembly and the upper sheave assembly will draw the upper sheave assembly and the lower sheave assembly together when the cable is pulled upward. The bucket further has a plurality of bucket segments and a plurality of arms, each of the arms having an end pivotally connected to the upper sheave housing and another end pivotally connected to one of the bucket segments. A lower block assembly is pivotally linked with the bucket segments in a manner such that vertical movement of the lower block assembly in relation to the upper sheave housing opens and closes the bucket segments. The bucket includes a connector device for mechanically connecting the lower sheave assembly and the lower block assembly when the bucket segments are supporting the weight of the clamshell bucket. Finally, the bucket includes a damping assembly comprising a first lever arm, having a first and second e…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.