Icy beverage machine

{
  "publication_number": "US3726102A",
  "country": "US",
  "kind": "A",
  "title": "Icy beverage machine",
  "abstract": "To maintain a balanced liquid-gas charge in the cooling chamber of an icy beverage machine, gas is introduced when the pressure in the cooling chamber falls below about 25 psi. Then after about a 3-to-8 second delay, liquid is charged into the cooling chamber until the pressure in the cooling chamber reaches about 30 psi.",
  "claims": [
    "1. In a machine for making icy drinks having a. a cooling chamber containing i. a mixed liquid product and ii. carbon dioxide gas, b. agitator means in the cooling chamber for agitating the contents, c. chilling means attached to the chamber for chilling the contents, and d. a faucet on the chamber for dispensing the drinks therefrom; e. THE IMPROVED METHOD OF MAINTAINING A BALANCED CHARGE OF LIQUID PRODUCT AND CARBON DIOXIDE GAS IN THE COOLING CHAMBER COMPRISING: f. sensing a need for charging the cooling chamber, g. opening a valve connecting a source of carbon dioxide gas under pressure to the cooling chamber responsive to sensing the need; thereafter h. pumping liquid product into the cooling chamber responsive to the sensing of the need to charge, and in addition to a time delay caused by heating a thermal switch, j. sensing when the cooling chamber is charged, then simultaneously k. closing the valve and stopping the pump.",
    "2. The invention as defined in claim 1 with the additional limitation of m. measuring the pressure within the cooling chamber, thus sensing the need for charging same and when the same is charged.",
    "3. The invention as defined in claim 1 with the additional limitation of n. maintaining the pressure of the source of carbon dioxide gas not more than about 2 psi higher than the maximum pressure of the cooling chamber.",
    "4. The invention as defined in claim 1 with the additional limitations of m. maintaining the cooling chamber at a pressure between about 25 psi and 30 psi, and n. supplying carbon dioxide at not more than about 32 psi.",
    "5. In a machine for making icy drinks having a. a cooling chamber containing i. a mixed liquid product and ii. carbon dioxide gas, b. agitator means in the cooling chamber for agitating the contents, c. chilling means attached to the chamber for chilling the contents, and d. a faucet on the chamber for disepensing the drinks therefrom; e. a source of carbon dioxide gas under pressure, f. pressure regulator means on the source of gas for regulating the pressure thereof, g. a solenoid valve connecting the souce of gas and the cooling chamber, h. a pump connected to the cooling chamber for pumping liquid thereto, j. a pump motor connected to the pump, and k. electric control means connected to the cooling chamber for actuating the solenoid and pump motor, m. THE IMPROVED STRUCTURE FOR MAINTAINING A BALANCED CHARGE COMPRISNG: n. a thermal delay switch attached to the pump motor for delaying the start of the motor after the solenoid valve is opened.",
    "6. The invention as defined in claim 5 wherein said electric control means is o. a pressure switch."
  ],
  "cpc": [
    "B67D 1/1243",
    "A23G 9/228",
    "B67D 1/0861",
    "F25D 31/002",
    "Y10S 261/07"
  ],
  "ipc": [
    "A23G 9/22",
    "B67D 1/08",
    "B67D 1/12",
    "F25D 31/00"
  ],
  "inventors": [
    "C Parks"
  ],
  "filing_date": "1971-08-03",
  "publication_date": "1973-04-10",
  "grant_date": "1973-04-10",
  "priority_date": "1971-08-03",
  "application_number": "US-3726102D-A",
  "family_id": "22612308",
  "cited_by_count": 29,
  "citations": [
    "US2514463A",
    "US3403524A"
  ]
}