Liquid circulation method and apparatus
US4367785A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 1981 |
| Grant date | Jan 11, 1983 |
| Priority date | — |
| Expiry date | Feb 9, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86381
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Method and apparatus for providing a controlled pressure liquid circulation system comprising a circulation conduit through which a liquid can be circulated and recirculated to accomplish a desired function, such as heating and/or cooling of a work station such as a mold. The invention involves opening and closing said circulation conduit to a source of supply liquid, such as city water, at elevated pressure while maintaining the controlled pressure of the liquid within said circulation conduit at a substantially lower pressure, and is characterized by maintaining the circulation conduit open to a drain line at all times and providing or maintaining a drain pressure which is at least slightly above atmospheric and is equal to the pressure desired within the circulation conduit in the area thereof which is open to the drain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.