Leak detection device and components therefor
US5571949A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1995 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Jul 14, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/3209
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A leak detection device includes a container-rotating disc mounted for rotation about a rotation axis. Multiple container-supporting test heads are mounted to the disc for rotation about the rotation axis. Each test head includes a sealing assembly supported by a first cam follower and comprising a cylinder, and a piston supported by a second cam follower and received in the cylinder. First and second annular cams are mounted above the disc to operate the first and second cam followers, respectively, such that the sealing assemblies and the pistons are moved between respective upper and lower positions as the disc rotates with respect to the cams. The cams are shaped to press the sealing assemblies against the containers, to raise the pistons to draw a partial vacuum in the containers, and then to lift the sealing assemblies and any sealed containers for a vacuum test. An improved seal accommodates a wavy upper surface of the container. An improved test head includes a first element that supports the seal and a second element supported by the first cam follower, wherein the first and second elements are mounted for limited axial movement with respect to one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.