Patent US3797268A successfully refreshed from Google Patents.
US3797268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for making ice cream
Assignee: WETRIFIN AG
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Filing: 1972-02-01
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Granted: 1974-03-19
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Expires: 1992-02-01
Abstract
Abstract A machine for making ice cream having an independent container containing ice cream mix located within a refrigerating chamber, a cylinder of gas under pressure, a feed line extending from the cylinder to the container, a mixer-freezer located outside of the refrigerating chamber, and an outlet tube extending between the container and the mixer-freezer.
Inventors
- 👤 G Garavelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:44
CPC Classifications
A; A23; A23G; A23G9/00; A23G9/04; A23G9/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
200 words
A machine for making ice cream comprising: a refrigerating chamber; a mixer-freezer locateD outwardly of the refrigerating chamber; an independent container located within the refrigerating chamber adapted to contain ice cream mix; an outlet tube extending between said container and said mixer-freezer through which ice cream to be mixed and frozen is conveyed from the container to the mixer-freezer, at least part of said outlet tube being located in the refrigerating chamber and part of said outlet tube being outside of the refrigerating chamber, with the part of the outlet tube that is not located in the refrigerating chamber being of such length as to allow cooling of the ice cream mix therein solely by thermal conduction from the refrigerating chamber and the mixerfreezer; a source of gas under pressure; a motor, operatively connected to the mixer-freezer for powering the mixer-freezer, contained within the refrigerating chamber; a distributing device associated with the mixer-freezer; and means for cooling the distributing device, and a feed line extending from said source of gas to said container for conveying the gas to the container, said gas and the ice cream mix then being conveyed via the outlet tube from the container to the mixer-freezer.
Claim 2
Dependent Claim
200 words
A machine for making ice cream comprising: a refrigerating chamber; a mixer-freezer locateD outwardly of the refrigerating chamber; an independent container located within the refrigerating chamber adapted to contain ice cream mix; an outlet tube extending between said container and said mixer-freezer through which ice cream to be mixed and frozen is conveyed from the container to the mixer-freezer, at least part of said outlet tube being located in the refrigerating chamber and part of said outlet tube being outside of the refrigerating chamber, with the part of the outlet tube that is not located in the refrigerating chamber being of such length as to allow cooling of the ice cream mix therein solely by thermal conduction from the refrigerating chamber and the mixerfreezer; a source of gas under pressure; a motor, operatively connected to the mixer-freezer for powering the mixer-freezer, contained within the refrigerating chamber; a distributing device associated with the mixer-freezer; and means for cooling the distributing device, and a feed line extending from said source of gas to said container for conveying the gas to the container, said gas and the ice cream mix then being conveyed via the outlet tube from the container to the mixer-freezer.
Claim 3
Dependent Claim
51 words
A machine as defined in claim 1 further comprising: a counter situated above the refrigerating chamber; a housing placed on the counter which contains the mixer-freezer; a driving belt extending between the motor and the mixer-freezer; and an opening in the counter through which extend the driving belt and outlet tube.
Claim 4
Dependent Claim
23 words
A machine as defined in claim 1 further comprising: a compressor so constructed as to cool both the mixer-freezer and the refrigerating chamber.
Claim 5
Dependent Claim
28 words
A machine as defined in claim 1 further comprising: a door in the refrigerating chamber to permit the interchange of containers and the inspection of the refrigerating chamber.
Claim 6
Dependent Claim
69 words
A machine as defined in claim 1 further comprising: a wall forming part of the refrigerating chamber; and wherein said source of gas under pressure is located outwardly of the refrigerating chamber and said feed line extends through said wall; the gas having the dual function of combining with ice cream mix in the container and of conveying the gas-ice cream mix combination under pressure through the outlet tube.
Claim 7
Dependent Claim
31 words
A machine as defined in claim 1 further comprising: a pump interposed between the independent container and the outlet tube for conveying the gas-ice cream mix combination through the outlet tube.
Claim 8
Dependent Claim
48 words
A machine as defined in claim 1 in which said means for cooling the distributing device comprises: a second refrigerating chamber which contains the distributing device; and wherein said second refrigerating chamber comprises a window which serves as an opening through which the ice cream may be served.
Claim 9
Dependent Claim
139 words
A machine for making ice cream comprising: a refrigerating chamber; a mixer-freezer located outwardly of the refrigerating chamber; an independent container located within the refrigerating chamber adapted to contain ice cream mix; an outlet tube extending between said container and said mixer-freezer through which ice cream to be mixed and frozen is conveyed from the container to the mixer-freezer, at least part of said outlet tube being located in the refrigerating chamber; a source of gas under pressure; a feed line extending from said source of gas to said container for conveying the gas to the container, said gas and the ice cream mix then being conveyed via the outlet tube from the container to the mixer-freezer; and means so constructing the refrigerating chamber as to withstand a high internal pressure equivalent to the pressure inside the independent container.
Claim 10
Dependent Claim
139 words
A machine for making ice cream comprising: a refrigerating chamber; a mixer-freezer located outwardly of the refrigerating chamber; an independent container located within the refrigerating chamber adapted to contain ice cream mix; an outlet tube extending between said container and said mixer-freezer through which ice cream to be mixed and frozen is conveyed from the container to the mixer-freezer, at least part of said outlet tube being located in the refrigerating chamber; a source of gas under pressure; a feed line extending from said source of gas to said container for conveying the gas to the container, said gas and the ice cream mix then being conveyed via the outlet tube from the container to the mixer-freezer; and means so constructing the refrigerating chamber as to withstand a high internal pressure equivalent to the pressure inside the independent container.
Claim 11
Dependent Claim
42 words
A machine as defined in claim 1 wherein said outlet tube comprises a conduit that is attached at one end to the refrigerating chamber by a connecting valve and is attached at its other end to the mixer-freezer by a connecting 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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |