US3593650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urn-type coffee brewer
Assignee: Bunn O Matic Corp
•
Filing: 1970-01-15
•
Granted: 1971-07-20
•
Expires: 1990-01-15
Abstract
Abstract Urn-type coffee brewer has a tank having a cover from which a pair of coffee extract receptacles depend into hot water in the tank. Each receptacle has a downwardly stepped apertured plastic cover for receiving over a limited area a correspondingly stepped plastic funnel on which a ground coffee carrying filter is placed. The funnel is arranged for two hand manipulation. A plastic funnel cover overlies the funnel on one receptacle and a duplicate cover overlies the other receptacle. A spray head is detachably mounted underneath an apertured cup-shaped formation on the funnel cover and is supplied with hot water from the tank by an electric motor driven pump controlled by a timer which determines the length of the brewing cycle. Flow of water to the tank is controlled by a solenoid valve in accordance with the water level in the tank at a rate that is less than the rate of outflow of hot water to the spray head. L-shaped thermostatically controlled electric heating elements maintain the water in the tank at a predetermined temperature. A continuously energized heater in the tank compensates for heat loss therefrom. A replaceable panel has mounted thereon the motor driven pump and timer therefor, the valve and its water level control, the heating elements and thermostat controls, and the continuously energized heater.
Inventors
- 👤 John C Martin
- 👤 Eugene G Rescho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:36
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/007
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
122 words
Coffee making apparatus comprising: a tank for containing hot water, a metallic cover for said tank having a pair of coffee extract receptacles formed integrally therewith each having a convex rim, a plastic receptacle cover for each receptacle having a downwardly stepped apertured central portion and concave rim for overlying the respective convex rim, at least one plastic funnel having a downwardly stepped apertured central portion conforming generally to said central portion of said receptacle cover and adapted to receive a ground coffee carrying filter, a plastic funnel cover for said funnel adapted to overlie said receptacle cover absent said funnel, a spray head carried by said funnel cover, and means for delivering hot water from said tank to said spray head.
Claim 2
Dependent Claim
122 words
Coffee making apparatus comprising: a tank for containing hot water, a metallic cover for said tank having a pair of coffee extract receptacles formed integrally therewith each having a convex rim, a plastic receptacle cover for each receptacle having a downwardly stepped apertured central portion and concave rim for overlying the respective convex rim, at least one plastic funnel having a downwardly stepped apertured central portion conforming generally to said central portion of said receptacle cover and adapted to receive a ground coffee carrying filter, a plastic funnel cover for said funnel adapted to overlie said receptacle cover absent said funnel, a spray head carried by said funnel cover, and means for delivering hot water from said tank to said spray head.
Claim 3
Dependent Claim
19 words
Coffee making apparatus according to claim 1 wherein said receptacle cover and said funnel have limited area contact engagement.
Claim 4
Dependent Claim
22 words
Coffee making apparatus according to claim 2 wherein said limited area contact engagement is along peripheral portions of said cover and funnel.
Claim 5
Dependent Claim
31 words
Coffee making apparatus according to claim 1 wherein said funnel has an integral handle extending radially from its upper portion and a diametrically opposite radial flange to facilitate two handed manipulation.
Claim 6
Dependent Claim
39 words
Coffee making apparatus according to claim 1 wherein said funnel cover has annular depending rib means along its periphery to cause condensate on the underside to drip into said funnel or said receptacle cover as the case may be.
Claim 7
Dependent Claim
36 words
Coffee making apparatus according to claim 1 wherein: said funnel cover has an integral central upstanding cup shaped formation with an aperture in the bottom, and means mount said spray head underneath the last mentioned aperture.
Claim 8
Dependent Claim
18 words
Coffee making apparatus according to claim 6 wherein means detachably secure said spray head to said funnel cover.
Claim 9
Dependent Claim
39 words
Coffee making apparatus according to claim 1 wherein means controlled in accordance with the level of water in said tank supply water thereto at a lesser rAte than hot water is delivered to said spray head from said tank.
Claim 10
Dependent Claim
32 words
Coffee making apparatus according to claim 1 wherein: said hot water delivering means includes a pump, and means control the time during which said pump is operated for each coffee brewing cycle.
Claim 11
Dependent Claim
94 words
Coffee making apparatus according to claim 1 wherein: water inlet valve means control flow of water to said tank, means responsive to the level of water in said tank control operation of said water inlet valve means, electric heater means supply heat to water in said tank, thermostat means control energization of said electric heater means to maintain said water at a predetermined temperature, said hot water delivering means includes an electric motor driven pump, and timer means control the time during which said electric motor driven pump is operated for each brewing cycle.
Claim 12
Dependent Claim
37 words
Coffee making apparatus according to claim 10 wherein: a removable panel is mounted on said metallic cover for said tank, and means mount said means specified in claim 11 on said panel between said coffee extract receptacles.
Claim 13
Dependent Claim
44 words
Coffee making apparatus according to claim 11 wherein: said electric heater means comprises a pair of generally L-shaped heater elements with the short arm of each underlying one of said coffee extract receptacles, and means removably mount said electric heater means on said panel.
Claim 14
Dependent Claim
29 words
Coffee making apparatus according to claim 11 wherein flow control valve means on said panel control the rate at which said pump delivers hot water to said spray head.
Claim 15
Dependent Claim
28 words
Coffee making apparatus according to claim 11 wherein said electric heater means includes a heater adapted to be energized continuously to compensate for heat loss from said tank.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |