US4205535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Household soft-ice-cream machine
Assignee: M&F Engineering AG
•
Filing: 1978-09-05
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Granted: 1980-06-03
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Expires: 1998-09-05
Abstract
Abstract A household soft-ice-cream machine is disclosed. The soft-ice-cream machine includes a housing with a removable lid, said housing including a hollow chamber in which soft ice cream may be formed. An agitator for agitating a soft ice cream mix is located in the hollow chamber. A replaceable cooling cartridge is located in the housing below the hollow compartment and cools the compartment. A replaceable pressure gas cartridge is attached to the housing and introduces pressurized gas into the hollow chamber. A soft ice cream removal valve permits removal of the soft ice cream from the hollow compartment.
Inventors
- 👤 Wilhelm Maurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:40
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/02; F25D3/06; A; A23; A23G; A23G9/00; A23G9/04; A23G9/08; A23G9/12; A23G9/20
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
166 words
A household soft-ice-cream machine, comprising: a housing with a removable lid, said housing including a hollow chamber in which soft ice cream can be made; a replaceable pressure gas cartridge attached to said housing for introducing pressurized gas into said hollow chamber; a replaceable cooling cartridge adapted to be received in the bottom of said housing, said cooling cartridge having a flat upper cooling surface on which soft ice cream is formed, said upper cooling surface defining the entire bottom surface of said hollow chamber when said cooling cartridge is placed in the bottom of said housing; a scraping tool adapted to scrape soft ice cream formed on said cooling surface off of said cooling surface as said tool is moved over said cooling surface; means for moving said scraping tool over said cooling surface so as to scrape soft ice cream off of said cooling surface; and a soft ice cream removal valve for permitting the removal of soft ice cream from said hollow chamber.
Claim 2
Dependent Claim
166 words
A household soft-ice-cream machine, comprising: a housing with a removable lid, said housing including a hollow chamber in which soft ice cream can be made; a replaceable pressure gas cartridge attached to said housing for introducing pressurized gas into said hollow chamber; a replaceable cooling cartridge adapted to be received in the bottom of said housing, said cooling cartridge having a flat upper cooling surface on which soft ice cream is formed, said upper cooling surface defining the entire bottom surface of said hollow chamber when said cooling cartridge is placed in the bottom of said housing; a scraping tool adapted to scrape soft ice cream formed on said cooling surface off of said cooling surface as said tool is moved over said cooling surface; means for moving said scraping tool over said cooling surface so as to scrape soft ice cream off of said cooling surface; and a soft ice cream removal valve for permitting the removal of soft ice cream from said hollow chamber.
Claim 3
Dependent Claim
22 words
The soft-ice-cream machine of claim 1, wherein said housing is generally cylindrical in shape and wherein said cooling cartridge is disk shaped.
Claim 4
Dependent Claim
17 words
The soft-ice-cream machine of claim 2, wherein said cooling cartridge is divided into more than one section.
Claim 5
Dependent Claim
17 words
The soft-ice-cream machine of claim 2 or 3, wherein said cooling cartridge has a conical outer wall.
Claim 6
Dependent Claim
15 words
The soft-ice-cream machine of claim 4, wherein said cooling cartridge has a conical inner wall.
Claim 7
Dependent Claim
19 words
The soft-ice-cream machine of claim 1, wherein said moving means includes a motor and gearing located in said lid.
Claim 8
Dependent Claim
28 words
The soft-ice-cream machine of claim 1, wherein said scraping tool also includes means for agitating a soft ice cream mix which may be placed in said hollow chamber.
Claim 9
Dependent Claim
44 words
The soft-ice-cream machine of claim 1 or 7, wherein said scraping tool is attached to a drive shaft extending from said lid and wherein said soft-ice-cream machine further includes means for spring biasing said scraping tool against said cooling surface of said cooling cartridge.
Claim 10
Dependent Claim
26 words
The soft-ice-cream machine of claim 8, wherein said biasing means biases said scraping tool against said upper surface of said cooling cartridge with a predetermined force.
Claim 11
Dependent Claim
16 words
The soft-ice-cream machine of claim 1, wherein said gas cartridge is removably attached to said lid.
Claim 12
Dependent Claim
12 words
The soft-ice-cream machine of claim 1, wherein said lid includes a handle.
Claim 13
Dependent Claim
28 words
The soft-ice-cream machine of claim 11, wherein said handle extends from one side of said housing and said removal valve extends from the opposite side of said housing.
Claim 14
Dependent Claim
18 words
The soft-ice-cream machine of claim 1 or claim 12, wherein said removal valve is a manually controlled valve.
Claim 15
Dependent Claim
37 words
The soft-ice-cream machine of claim 1, wherein said removal valve permits soft ice cream to escape from said hollow compartment under the force of said pressurized gas released into said hollow compartment by said pressure gas cartridge.
Claim 16
Dependent Claim
37 words
The soft-ice-cream machine of claim 13, wherein said removal valve permits soft ice cream to escape from said hollow compartment under the force of said pressurized gas released into said hollow compartment by said pressure gas cartridge.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-03 | 1983-12-03 | 1984-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-03 | 1987-12-03 | 1988-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-03 | 1991-12-03 | 1992-06-03 | $7700.00 | Window Closed / Lapsed |