Variable-capacity self-adjusting pneumatic load elevator
US8851237B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 2010 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Jul 3, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F7/085
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A pneumatic system with multiple air reservoirs is connected to the bellows of a load elevator. A plurality of valves enables the optional pneumatic connection of different combinations of reservoirs so as to change the range of operation of the elevator to meet the self-adjusting weight requirements of a particular job at hand. In the preferred embodiment, the air actuator is pneumatically connected to a main air reservoir, which in turn can optionally be coupled in series with one or two additional reservoirs of different capacities. As a result of this configuration of its pneumatic system, the elevator can be switched between and operated at three different load levels, at the convenience of the operator, without changing the amount of air in the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.