Vacuum lift assembly
US4749219A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1988 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Jun 7, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C1/0293
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A vacuum lift assembly for lifting sheet members to an elevated position. The assembly comprises an air power cylinder vertically positioned with its piston rod projecting downwardly out of the cylinder; a mounting plate to which the mounting flange on the lower end of the cylinder of the cylinder assembly is mounted; a collar extending rigidly downwardly from the mounting plate in surrounding coaxial relation to the piston rod of the cylinder assembly; a block member secured to the lower end of the piston rod and including a bore at its lower end coacting with a vacuum cup secured to the lower end of the block member to define a vacuum cavity; and a lever extending generally vertically at one side of the block member, pivoted intermediate its upper and lower ends on the block member, carrying a seal member at its lower end for respectively opening and closing a vent passage communicating with the bore in the lower end of the block member, and a cam portion adjacent its upper end sized and configured to engage the lower end of the collar in response to upward movement of the piston rod and then guide upwardly along the inner periphery of the collar member as the block member and le…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.