US3608471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety start switch system for coffee urn having a swing spout
Assignee: Bunn O Matic Corp
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Filing: 1970-07-28
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Granted: 1971-09-28
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Expires: 1990-07-28
Abstract
Abstract In order to encourage inspection of the position of a swing spout of a coffee urn to observe whether it is in position to discharge hot water into one or the other of a pair of coffeemaking receptacles, two series connected start switches are located on opposite sides of the swing spout, require simultaneous closure to start a pump to supply hot water to the swing spout, and are closed by the use of both hands of the operator.
Inventors
- 👤 John C Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:26
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/44; A47J31/54; A47J31/56
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
Coffeemaking apparatus comprising: a tank for containing hot water, a pair of coffeemaking receptacles in said tank, a funnel on one of said receptacles for receiving ground coffee, a swing spout for supplying hot water to one or the other of said coffeemaking receptacles, a pump for delivering hot water from said tank to said swing spout, an electric motor for driving said pump, a pair of series-connected start switches from connecting said motor for energization to a current source, and means for maintaining said motor energized for a predetermined time after opening of said start switches.
Claim 2
Dependent Claim
97 words
Coffeemaking apparatus comprising: a tank for containing hot water, a pair of coffeemaking receptacles in said tank, a funnel on one of said receptacles for receiving ground coffee, a swing spout for supplying hot water to one or the other of said coffeemaking receptacles, a pump for delivering hot water from said tank to said swing spout, an electric motor for driving said pump, a pair of series-connected start switches from connecting said motor for energization to a current source, and means for maintaining said motor energized for a predetermined time after opening of said start switches.
Claim 3
Dependent Claim
33 words
Coffeemaking apparatus according to claim 1 wherein said start switches are single-pole single-throw switches, are biased to open position, and both are required to be held closed simultaneously to energize said pump motor.
Claim 4
Dependent Claim
31 words
Coffeemaking apparatus according to claim 2 wherein said start switches are spaced apart on opposite sides of said swing spout and both hands of an operator are used to close them.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |