Cooling-controlled tank for hydraulic fluid
US3976124A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1974 |
| Grant date | Aug 24, 1976 |
| Priority date | — |
| Expiry date | Nov 21, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7036
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A tank for oil or other hydraulic fluid is improved both for cooling the fluid during normal operation and for heating it up preliminarily at start-up time by an internal curtain spaced a narrow distance from the side walls and providing a cooling channel through which, during operation, the oil may be passed in immediate contact with the outer side walls of the tank to be cooled before flowing into the main storage chamber, a flap valve being turned at start-up time to a position to direct returning oil directly into the main storage chamber where it is relatively insulated from the outer side walls by the stagnant oil in the cooling channel, so that the heat developed by power-circulation of the oil is conserved and in cold weather the oil is more quickly brought up to satisfactory operating temperature. The peripheral cooling channel normally used also settles foreign particles from the hydraulic fluid, and dissipates any entrained air at its surface. However, the tank is preferably kept under a few pounds of air pressure during operation to keep air from being drawn into the fluid and to aid its flow to the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.