Portable filter
US4702827A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1986 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Apr 16, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A portable filter has an oil remove/return wand for insertion into a cooking apparatus utilizing hot oil. A flexible hose connects the wand to a motor pump and supports a motor direction control switch adjacent to the wand. A compartmentalized housing includes: a container having an inlet and an outlet, a removable filter holder mounted in the container, plumbing connecting the container inlet and outlet to the motor pump, a heating element for the outlet plumbing, a control panel having an OFF switch for connection to a power supply and FILTER and HEATER switches connected to the OFF switch, and indicator lights for the OFF, FILTER, HEATER switches. The motor direction switch is connected to the FILTER switch and to first and second delay circuits. The heater switch is connected to the heater element to apply power; while the heater switch is ON the filter switch cannot be activated. The filter switch selectively connects the first and second delay circuits to a reversible motor of the motor pump for delaying power application to the motor until the pump stops during switching between the oil removal and oil refill modes, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.