US4354427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coffee and tea making or brewing apparatus
Assignee: Hobart Manfacturing Co Ltd
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Filing: 1980-06-30
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Granted: 1982-10-19
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Expires: 2000-06-30
Abstract
Abstract Coffee and tea making or brewing apparatus of the type in which heated water is caused to flow through a spray head, the resulting spray impinging on a bed of ground coffee (or tea) through which the hot water passes to produce coffee or tea liquor. In accordance with the invention the spray head is provided with a number of dimples. The heads of the dimples being provided or formed with a surface to which a drop of liquid emerging through a spray hole in the dimple, may cling. With this construction the drops fall over the coffee or tea bed in a random fashion which may be compared with raindrops and this helps properly to prevent nuclei being formed in the coffee bed.
Inventors
- 👤 Maciej K. Filipowicz
- 👤 Cecil Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:28
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/04; A47J31/057; A47J31/0573
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
261 words
Brewing apparatus for coffee and tea, said apparatus comprising a supply tank for containing a supply of water, a heater unit for heating water to boiling point and creating pressure, means to supply water from said supply tank to said heater unit, a basket for carrying a bed of one of coffee and tea, said basket being lined with a filter paper prior to receipt of said bed, hot water being passed through said bed to produce a brewed liquor, a spray head positioned above said bed, said spray head being adapted to discharge hot water on said bed, a series of dimples on the bottom of said spray head, each of said dimples defining a spray hole through which hot water can pass, each of said dimples extending downwardly beneath the bottom of said spray head so that said spray holes are positioned beneath the bottom of said spray head, and each of said dimples being provided with a surface to which a drop of hot water passing through said spray hole may cling due to surface tension of said water prior to dropping onto said bed, said dimples cooperating to distribute hot water drops over said bed in a random fashion in a manner akin to raindrops, means between said heater unit and said spray head to supply water under pressure and at, or just below, boiling point from said heater unit to said series of dimples, and means positioned beneath said bed to receive the brewed coffee or tea, said receiving means being separate from said supply tank.
Claim 2
Dependent Claim
261 words
Brewing apparatus for coffee and tea, said apparatus comprising a supply tank for containing a supply of water, a heater unit for heating water to boiling point and creating pressure, means to supply water from said supply tank to said heater unit, a basket for carrying a bed of one of coffee and tea, said basket being lined with a filter paper prior to receipt of said bed, hot water being passed through said bed to produce a brewed liquor, a spray head positioned above said bed, said spray head being adapted to discharge hot water on said bed, a series of dimples on the bottom of said spray head, each of said dimples defining a spray hole through which hot water can pass, each of said dimples extending downwardly beneath the bottom of said spray head so that said spray holes are positioned beneath the bottom of said spray head, and each of said dimples being provided with a surface to which a drop of hot water passing through said spray hole may cling due to surface tension of said water prior to dropping onto said bed, said dimples cooperating to distribute hot water drops over said bed in a random fashion in a manner akin to raindrops, means between said heater unit and said spray head to supply water under pressure and at, or just below, boiling point from said heater unit to said series of dimples, and means positioned beneath said bed to receive the brewed coffee or tea, said receiving means being separate from said supply tank.
Claim 3
Dependent Claim
46 words
Brewing apparatus as set forth in claim 1, said dimple surface of each dimple to which said hot water drops cling comprising a flattened surface area surrounding said spray hole, said flattened surface being positioned beneath and generally parallel to the bottom of said spray head.
Claim 4
Dependent Claim
260 words
Brewing apparatus for coffee and tea, said apparatus comprising a supply tank for containing a supply of water, a heater unit for heating water to boiling point, means to supply water from said supply tank to said heater unit, a basket for carrying a bed of one of coffee and tea, said basket being lined with a filter paper prior to receipt of said bed, hot water being passed through said bed to produce a brewed liquor, a spray head positioned above said bed, said spray head being adapted to discharge hot water on said bed, a series of dimples on the bottom of said spray head, each of said dimples defining a spray hole through which hot water can pass, each of said dimples extending downwardly beneath the bottom of said spray head so that said spray holes are positioned no higher than the bottom of said spray head, and each of said dimples being provided with a surface to which a drop of hot water passing through said spray hole may cling due to surface tension of said water prior to dropping onto said bed, said dimples cooperating to distribute hot water drops over said bed in a random fashion in a manner akin to raindrops, means between said heater unit and said spray head to supply water under pressure and at, or just below, boiling point from said heater unit to said series of dimples, and means positioned beneath said bed to receive the brewed coffee or tea, said receiving means being separate from said supply tank.
Claim 5
Dependent Claim
260 words
Brewing apparatus for coffee and tea, said apparatus comprising a supply tank for containing a supply of water, a heater unit for heating water to boiling point, means to supply water from said supply tank to said heater unit, a basket for carrying a bed of one of coffee and tea, said basket being lined with a filter paper prior to receipt of said bed, hot water being passed through said bed to produce a brewed liquor, a spray head positioned above said bed, said spray head being adapted to discharge hot water on said bed, a series of dimples on the bottom of said spray head, each of said dimples defining a spray hole through which hot water can pass, each of said dimples extending downwardly beneath the bottom of said spray head so that said spray holes are positioned no higher than the bottom of said spray head, and each of said dimples being provided with a surface to which a drop of hot water passing through said spray hole may cling due to surface tension of said water prior to dropping onto said bed, said dimples cooperating to distribute hot water drops over said bed in a random fashion in a manner akin to raindrops, means between said heater unit and said spray head to supply water under pressure and at, or just below, boiling point from said heater unit to said series of dimples, and means positioned beneath said bed to receive the brewed coffee or tea, said receiving means being separate from said supply tank.
Claim 6
Dependent Claim
46 words
Brewing apparatus as set forth in claim 3, said dimple surface of each dimple to which said hot water drops cling comprising a flattened surface area surrounding said spray hole, said flattened surface being positioned beneath and generally parallel to the bottom of said spray head.
Claim 7
Dependent Claim
42 words
Brewing apparatus as set forth in claim 3, said dimple surface of each dimple to which said hot water drops cling comprising an upwardly sloping conical wall surrounding said spray hole, said wall being positioned beneath the bottom of said spray head.
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) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |