Patent US3583308A successfully refreshed from Google Patents.
US3583308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heating and dispensing water for coffee makers
Assignee: Individual
•
Filing: 1969-08-29
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Granted: 1971-06-08
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Expires: 1989-08-29
Abstract
Abstract A coffee making device for use in aircraft and similar installations has a water-heating cylinder into the top of which cold water flows. A piston reciprocates in the cylinder and has a check valve. The piston is biased to ''''up'''' position by a spring. When the piston is up, the check valve is normally closed. When water is dispensed through a dispenser valve from the bottom of the cylinder, cold water flows into the top, depressing the piston to force out hot water, the piston acting as a thermal barrier between the hot and cold water. When the cylinder is empty, the dispenser valve is closed and the check valve opened permitting cold water to fill the cylinder. The spring returns the piston to ''''up'''' position and the check valve is closed.
Inventors
- 👤 Willie L Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:31
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/44; A47J31/54
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
Apparatus for heating and dispensing hot water comprising a tank, heating means for said tank, a piston reciprocable in said tank, means biasing said piston to first position, a piston valve in said piston movable between open position establishing fluid communication through said piston and closed position, a cold water inlet admitting cold water under pressure to the first position end of said tank, an outlet valve at the second position end of said tank opposite said first position, first means for closing said piston valve after said piston has reached first position, and second means for opening said piston valve after said piston has reached second position.
Claim 2
Dependent Claim
108 words
Apparatus for heating and dispensing hot water comprising a tank, heating means for said tank, a piston reciprocable in said tank, means biasing said piston to first position, a piston valve in said piston movable between open position establishing fluid communication through said piston and closed position, a cold water inlet admitting cold water under pressure to the first position end of said tank, an outlet valve at the second position end of said tank opposite said first position, first means for closing said piston valve after said piston has reached first position, and second means for opening said piston valve after said piston has reached second position.
Claim 3
Dependent Claim
17 words
Apparatus according to claim 1 in which said piston valve comprises an overcenter, spring operated check valve.
Claim 4
Dependent Claim
60 words
Apparatus according to claim 1 which further comprises a switch at the second end of said tank positioned to be contacted by said piston as it reaches said second end, said outlet valve being electrically actuated, said switch controlling said outlet valve to close said outlet valve when said piston reaches second position and means for opening said outlet valve.
Claim 5
Dependent Claim
19 words
Apparatus according to claim 3 in which said second means is electrically actuated, said switch controlling said second means.
Claim 6
Dependent Claim
22 words
Apparatus according to claim 1 which further comprises a chamber for a perforated container of ground coffee communicating with said outlet valve.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |