Lifting equipment having a boom structure and a control mechanism for use therewith using a flexible light guide
US4044856A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1975 |
| Grant date | Aug 30, 1977 |
| Priority date | — |
| Expiry date | Jul 25, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F11/044
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Lifting equipment having a support structure and a boom structure mounted on the support structure with a workman's platform carried by the boom structure. The boom structure includes means for electrically insulating the workman's platform from the support structure. A source of light is carried by the boom structure. A control mechanism is provided which is accessible from the workmans's platform. The control mechanism has means for receiving light from the light source. At least one light guide means is carried by the boom structure and is coupled to the control mechanism whereby upon operation of the control mechanism a light from said source can be selected and introduced into the one light guide means. Photosensitive means is provided for sensing when light is introduced into the light guide means. Means is provided which is connected to the photosensitive means for operating the lifting equipment whereby the outer end of the boom structure and the workman's platform can be moved with respect to the support structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.