Toilet flush assembly
US3987501A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1975 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | Jun 27, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03D5/024
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A control for the outlet of a liquid supply tank such as, for example, the water tank of a toilet, utilizes the retention or escape of air trapped above a valve float of the control to seat and unseat the valve against the outlet respectively. One embodiment has a standpipe extending vertically and centrally through the upper air trapping housing of the control for supporting such housing while the float reciprocates slidably along the standpipe between its lowered and buoyed positions. A second embodiment is adapted for use in existing installations wherein the standpipe is offset laterally from the outlet, the standpipe thus extending outside of and supporting the housing while the float is guided in its vertical reciprocation by internal ribs on the housing. A number of alternative arrangements are disclosed for manual actuation of the control, for automatic actuation thereof when the liquid within the tank reaches a predetermined level, and for automatic actuation only if manual actuation has not occurred prior to the water reaching such predetermined level. An additional embodiment has the seat for the valve rigidly connected to the housing in a unitary manner so that, regardl…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.