Double drain
US4930164A · kind A · utility
6Cited by
7References
23Claims
0Family size
Inventor
Key dates
| Filing date | Feb 13, 1989 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Feb 13, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03C1/23
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Double drain apparatus for concurrently draining vertically spaced portions of a bathtub or the like containing liquid, such as water, comprising an upstanding drainpipe having upper and lower drain openings therein, valve mechanism for controlling the flow of liquid through the upper and lower openings including upper and lower hollow stopper cylinders mounted in the drainpipe for sliding movement between positions blocking the upper and lower openings and vertically spaced drain positions. Mechanism is provided for concurrently moving the upper and lower stopper cylinders between the blocking and drain positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.