Drain valve for a marine engine
US5628285A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1995 |
| Grant date | May 13, 1997 |
| Priority date | — |
| Expiry date | Aug 31, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1353
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A drain valve assembly for automatically draining water from a cooling system of an inboard marine engine when the ambient temperature drops to a preselected value. The drain valve includes a cup-shaped base having a group of inlets connected to portions of a cooling system of the engine to be drained, and the open end of the base is enclosed by a cover. Each inlet defines a valve seat and a sealing piston is mounted for movement in the base and includes a series of valve members that are adapted to engage the valve seats. An outlet is provided in the sidewall of the cup-shaped base. The valve members on the sealing piston are biased to a closed position by a coil spring and a temperature responsive element interconnects the sealing piston with the cover. The temperature responsive element is characterized by the ability to exert a force in excess of the spring force of the coil spring when the ambient temperature is above about 50.degree. F., to thereby maintain the valve members in the closed position. When the temperature falls below the selected temperature, the temperature responsive element will retract, thereby permitting the valve members to be opened under the influence of…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.