US3715893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control system for freezers
Assignee: Individual
•
Filing: 1971-03-25
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Granted: 1973-02-13
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Expires: 1991-03-25
Abstract
Abstract A temperature control system for freezer mechanism of the continuous freezing type and in which various combinations of ingredients are fed into a freezing chamber and frozen. A scraper slowly rotates over the inner surface of the chamber to remove the frozen mix from the surface of the cylinder. The freezing chamber is pressurized and the product forced out of a serving valve at one end of the freezer and the temperature of the product is sensed and is used to control the refrigeration means. A heat anticipator is also energized during the draw and heats the sensing means so that the need for refrigeration is anticipated prior to the time it is actually required, thereby eliminating any time lag in supplying refrigeration.
Inventors
- 👤 B Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:45
CPC Classifications
A; A23; A23G; A23G9/00; A23G9/04; A23G9/14; A23G9/16; A23G9/22; A23G9/28; A23G9/281
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
309 words
In a freezer apparatus including a freezer cylinder adapted to discharge finished products out of one end and having a manually operated valve means including a pivotEd handle, a mix tank associated with said freezing cylinder, a mix pump adapted to transfer the mix from the tank to the freezing cylinder and simultaneously mixing air therewith to form an aerated mix, a scraper rotatably mounted within said freezing cylinder and revolvable about the inner surface to scrape the mix from the surface of the freezing cylinder, a refrigerant means associated with said freezing cylinder for reducing the temperature of the aerated mix to a preselected temperature, a temperature sensing element mounted adjacent the discharge end of the freezing cylinder and providing a signal proportional to the temperature of the discharging frozen mix, a preheater associated with said sensing means, and circuit means connected to actuate said mix pump, said scraper, said refrigerant supplying means and said heater, said circuit means including a pair of draw related actuated switches including a heater switch and a draw switch, a switch operator coupled to said pivoted handle to simultaneously close and open said switches, a manually operable on-off switch for simultaneously providing power to the mix pump and to said heater switch; said circuit including a pressure switch mounted in the freezing cylinder and connected in the circuit to the mix pump to maintain operation of the mix pump until a predetermined mix pressure is established within the freezing cylinder, said circuit including a freezing cylinder control switch including a first position to directly drive the scraper and a second position providing power to the temperature control sensing means and to the draw switch, said temperature control sensing means being connected to simultaneously energize said refrigerant supplying means and said scraper, and said draw switch being connected to directly actuate said scraper.
Claim 2
Dependent Claim
309 words
In a freezer apparatus including a freezer cylinder adapted to discharge finished products out of one end and having a manually operated valve means including a pivotEd handle, a mix tank associated with said freezing cylinder, a mix pump adapted to transfer the mix from the tank to the freezing cylinder and simultaneously mixing air therewith to form an aerated mix, a scraper rotatably mounted within said freezing cylinder and revolvable about the inner surface to scrape the mix from the surface of the freezing cylinder, a refrigerant means associated with said freezing cylinder for reducing the temperature of the aerated mix to a preselected temperature, a temperature sensing element mounted adjacent the discharge end of the freezing cylinder and providing a signal proportional to the temperature of the discharging frozen mix, a preheater associated with said sensing means, and circuit means connected to actuate said mix pump, said scraper, said refrigerant supplying means and said heater, said circuit means including a pair of draw related actuated switches including a heater switch and a draw switch, a switch operator coupled to said pivoted handle to simultaneously close and open said switches, a manually operable on-off switch for simultaneously providing power to the mix pump and to said heater switch; said circuit including a pressure switch mounted in the freezing cylinder and connected in the circuit to the mix pump to maintain operation of the mix pump until a predetermined mix pressure is established within the freezing cylinder, said circuit including a freezing cylinder control switch including a first position to directly drive the scraper and a second position providing power to the temperature control sensing means and to the draw switch, said temperature control sensing means being connected to simultaneously energize said refrigerant supplying means and said scraper, and said draw switch being connected to directly actuate said scraper.
Claim 3
Dependent Claim
309 words
In a freezer apparatus including a freezer cylinder adapted to discharge finished products out of one end and having a manually operated valve means including a pivotEd handle, a mix tank associated with said freezing cylinder, a mix pump adapted to transfer the mix from the tank to the freezing cylinder and simultaneously mixing air therewith to form an aerated mix, a scraper rotatably mounted within said freezing cylinder and revolvable about the inner surface to scrape the mix from the surface of the freezing cylinder, a refrigerant means associated with said freezing cylinder for reducing the temperature of the aerated mix to a preselected temperature, a temperature sensing element mounted adjacent the discharge end of the freezing cylinder and providing a signal proportional to the temperature of the discharging frozen mix, a preheater associated with said sensing means, and circuit means connected to actuate said mix pump, said scraper, said refrigerant supplying means and said heater, said circuit means including a pair of draw related actuated switches including a heater switch and a draw switch, a switch operator coupled to said pivoted handle to simultaneously close and open said switches, a manually operable on-off switch for simultaneously providing power to the mix pump and to said heater switch; said circuit including a pressure switch mounted in the freezing cylinder and connected in the circuit to the mix pump to maintain operation of the mix pump until a predetermined mix pressure is established within the freezing cylinder, said circuit including a freezing cylinder control switch including a first position to directly drive the scraper and a second position providing power to the temperature control sensing means and to the draw switch, said temperature control sensing means being connected to simultaneously energize said refrigerant supplying means and said scraper, and said draw switch being connected to directly actuate said scraper.
Claim 4
Dependent Claim
309 words
In a freezer apparatus including a freezer cylinder adapted to discharge finished products out of one end and having a manually operated valve means including a pivotEd handle, a mix tank associated with said freezing cylinder, a mix pump adapted to transfer the mix from the tank to the freezing cylinder and simultaneously mixing air therewith to form an aerated mix, a scraper rotatably mounted within said freezing cylinder and revolvable about the inner surface to scrape the mix from the surface of the freezing cylinder, a refrigerant means associated with said freezing cylinder for reducing the temperature of the aerated mix to a preselected temperature, a temperature sensing element mounted adjacent the discharge end of the freezing cylinder and providing a signal proportional to the temperature of the discharging frozen mix, a preheater associated with said sensing means, and circuit means connected to actuate said mix pump, said scraper, said refrigerant supplying means and said heater, said circuit means including a pair of draw related actuated switches including a heater switch and a draw switch, a switch operator coupled to said pivoted handle to simultaneously close and open said switches, a manually operable on-off switch for simultaneously providing power to the mix pump and to said heater switch; said circuit including a pressure switch mounted in the freezing cylinder and connected in the circuit to the mix pump to maintain operation of the mix pump until a predetermined mix pressure is established within the freezing cylinder, said circuit including a freezing cylinder control switch including a first position to directly drive the scraper and a second position providing power to the temperature control sensing means and to the draw switch, said temperature control sensing means being connected to simultaneously energize said refrigerant supplying means and said scraper, and said draw switch being connected to directly actuate said scraper.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |