Patent US3900580A successfully refreshed from Google Patents.
US3900580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing crumbs from cooking oil
Assignee: Food Research and Equipment Co
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Filing: 1972-09-11
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Granted: 1975-08-19
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Expires: 1992-09-11
Abstract
Abstract A deep fat fryer unit having solenoid operated valves controlled by switches, relays and motor driven timers for controlling the various phases of operation of the unit, including the pumping of oil from a storage tank into a heater tank and then into a cooking pot, through a filter, and return to the heater tank. The oil is continuously circulated through the heater tank and may be circulated through the cooking pot or bypass the cooking pot. A removable crumb conveyor continuously removes crumbs from a crumb well at the lower end of a filter bowl opening into the cooking pot and containing the filter. A vacuum switch is connected with the inlet of the pump and is set to close when the filter is about 50% clogged. Closing of the vacuum switch automatically effects return of the oil from the cooking pot to the storage tank and precludes resumption of normal cooking operations until after the filter has been cleaned. Upon removal of the filter and crumb conveyor, a pump-out adapter can be mounted in the filter bowl together with a pump-out hose and the oil pumped out of the crumb-well in response to operation of a sump switch. The storage tank and heater tank can be emptied one at a time by operating separate switches. An emergency STOP switch can be operated at any time to shut down the unit. Automatic signal lights on a control panel indicate when the unit is turned on, when the unit is in operation, when the heating grids are operating, when the heating grids are not working and oil is being circulated through the filter, and when a change of the filter is required.
Inventors
- 👤 Weldon C Boggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:36
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/12; A47J37/1233
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
THE METHOD OF REMOVING CRUMBS FROM THE COOKING OIL OF A FRYER UNIT HAVING A COOKING ZONE, COMPRISING THE STEPS OF: MAINTAINING A BODY OF CRUMB-CONTAINING COOKING OIL IN THE COOKING ZONE AT A COOKING TEMPERATURE, DIVERTING AT LEAST A PORTION OF THE CRUMBS IN THE COOKING OIL TO ANOTHER ZONE CONTAINING A BODY OF ENTRAPPED COOKING OIL AT A TEMPERATURE SUBSTANTIALLY LOWER THAN THAT IN SAID COOKING ZONE, AND REMOVING THE CRUMBS FROM THE ENTRAPPED BODY OF OIL IN SAID ZONE OF LOWER TEMPERATURE BY PASSSING A MOVING ELEMENT THROUGH THE ENTRAPPED BODY OF COOKING OIL IN THE ZONE OF LOWER TEMPERATURE.
Claim 2
Independent Claim
103 words
THE METHOD OF REMOVING CRUMBS FROM THE COOKING OIL OF A FRYER UNIT HAVING A COOKING ZONE, COMPRISING THE STEPS OF: MAINTAINING A BODY OF CRUMB-CONTAINING COOKING OIL IN THE COOKING ZONE AT A COOKING TEMPERATURE, DIVERTING AT LEAST A PORTION OF THE CRUMBS IN THE COOKING OIL TO ANOTHER ZONE CONTAINING A BODY OF ENTRAPPED COOKING OIL AT A TEMPERATURE SUBSTANTIALLY LOWER THAN THAT IN SAID COOKING ZONE, AND REMOVING THE CRUMBS FROM THE ENTRAPPED BODY OF OIL IN SAID ZONE OF LOWER TEMPERATURE BY PASSSING A MOVING ELEMENT THROUGH THE ENTRAPPED BODY OF COOKING OIL IN THE ZONE OF LOWER TEMPERATURE.
Claim 3
Dependent Claim
37 words
The method as defined in claim 1, including the step of: removing the crumbs from the cooking oil by continuously passing a moving element through the entrapped body of cooking oil in the zone of lower temperature.
Claim 4
Independent Claim
115 words
The method of removing crumbs from the cooking oil of a fryer unit including a cooking pot, comprising the steps of: introducing crumb containing cooking oil at substantially cooking temperature into a zone containing a filter and having a crumb collecting well below the filter; passing said oil through the filter and removing the filtered oil at a level in said zone above the crumb well; circulating the cooking oil through the cooking pot before introducing the same into the zone containing the filter; maintaining a body of oil entrapped in said crumb well for collecting crumbs not removed by the filter; and removing the collected crumbs from the entrapped oil in the crumb well.
Claim 5
Independent Claim
115 words
The method of removing crumbs from the cooking oil of a fryer unit including a cooking pot, comprising the steps of: introducing crumb containing cooking oil at substantially cooking temperature into a zone containing a filter and having a crumb collecting well below the filter; passing said oil through the filter and removing the filtered oil at a level in said zone above the crumb well; circulating the cooking oil through the cooking pot before introducing the same into the zone containing the filter; maintaining a body of oil entrapped in said crumb well for collecting crumbs not removed by the filter; and removing the collected crumbs from the entrapped oil in the crumb well.
Claim 6
Independent Claim
125 words
The method of removing crumbs from the cooking oil of a fryer unit having A cooking zone, comprising the steps of: maintaining a body of crumb-containing cooking oil in the cooking zone at a cooking temperature; diverting at least a portion of the crumbs in the cooking oil to a crumb collecting zone containing a body of entrapped cooking oil at a temperature substantially lower than that in said cooking zone; allowing the crumbs to settle by gravity toward the lower portion of the entrapped body of cooking oil; removing the crumbs from the entrapped body of oil in said zone of lower temperature; and withdrawing cooking oil at a level above said zone of lower temperature and returning the same to said cooking zone.
Claim 7
Independent Claim
125 words
The method of removing crumbs from the cooking oil of a fryer unit having A cooking zone, comprising the steps of: maintaining a body of crumb-containing cooking oil in the cooking zone at a cooking temperature; diverting at least a portion of the crumbs in the cooking oil to a crumb collecting zone containing a body of entrapped cooking oil at a temperature substantially lower than that in said cooking zone; allowing the crumbs to settle by gravity toward the lower portion of the entrapped body of cooking oil; removing the crumbs from the entrapped body of oil in said zone of lower temperature; and withdrawing cooking oil at a level above said zone of lower temperature and returning the same to said cooking zone.
Claim 8
Independent Claim
156 words
The method of removing crumbs from the cooking oil of a fryer unit having a cooking zone, comprising the steps of: maintaining a body of crumb-containing cooking oil in the cooking zone at a cooking temperature; passing the cooking oil through a filtering zone to separate crumbs from the cooking oil; diverting at least a portion of the crumbs in the cooking oil to another zone containing a body of entrapped cooking oil at a temperature substantially lower than that in said cooking zone; allowing the diverted crumbs to settle by gravity toward the lower portion of the entrapped body of cooking oil; removing the crumbs from the entrapped body of cooking oil in said zone of lower temperature; and diverting the cooking oil to a storage zone in response to a given resistance to flow through said filtering zone due to clogging of said filtering zone caused by the crumbs separated from the cooking oil.
Claim 9
Independent Claim
156 words
The method of removing crumbs from the cooking oil of a fryer unit having a cooking zone, comprising the steps of: maintaining a body of crumb-containing cooking oil in the cooking zone at a cooking temperature; passing the cooking oil through a filtering zone to separate crumbs from the cooking oil; diverting at least a portion of the crumbs in the cooking oil to another zone containing a body of entrapped cooking oil at a temperature substantially lower than that in said cooking zone; allowing the diverted crumbs to settle by gravity toward the lower portion of the entrapped body of cooking oil; removing the crumbs from the entrapped body of cooking oil in said zone of lower temperature; and diverting the cooking oil to a storage zone in response to a given resistance to flow through said filtering zone due to clogging of said filtering zone caused by the crumbs separated from the cooking oil.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |