Resilient chamber fluid sampler having vacuum breaker apparatus
US4470773A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1982 |
| Grant date | Sep 11, 1984 |
| Priority date | — |
| Expiry date | Sep 20, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/129
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a resilient chamber sampling apparatus incorporating a resilient body having a dished cavity area which is squeezed to pressure fluid trapped in the dished area, an improved form preferably incorporates an alternate anvil. It has a facing plate member at the end of the probe over a solid anvil. The cap or plate has a small hole in the center and telescopes with a small peripheral skirt aligning the cap with the resilient plug. On closure, high pressure is formed to force fluid from the cavity in the resilient body. When the probe is pulled away from the resilient body, the vacuum breaker slides in telescoping movement, and opens an external passage to fill the chamber where the fluid was pumped from, and the chamber is restored to its full size without pulling a vacuum, to avoid damage which might occur otherwise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.