Abstract: A method for removing contaminants from hard surfaces such as metal or plastic resin material using a propane and carbon dioxide system. The propane and carbon dioxide system removes the contaminants by a varying percentage of propane to carbon dioxide to maximize the cleaning properties while creating a gas combination without a flammability range in air.

Abstract: A clothes dryer has a test button for testing the fire suppression system of the dryer. The test button is connected to the temperature sensor of the fire suppression system such that when the test button is actuated it presents a signal, such as by shorting the two leads of the temperature sensor together, to simulate the condition of the temperature sensor sensing a high temperature. This triggers the control circuit of the fire suppression system to turn on a water valve to activate the sprinkler system. The fire suppression system is then reset by actuating a reset button.

Abstract: A liquified gas dry cleaning system is provided which includes a cleaning vessel for containing a pressurized cleaning fluid and a storage tank for receiving and storing a cleaning fluid supply. The system also includes a cleaning fluid recovery still for separating contaminants from the cleaning fluid along with a filtration system for filtering contaminants from the cleaning fluid. A purge tank for receiving gaseous cleaning fluid which is in fluid communication with the cleaning vessel is also provided. The cleaning vessel, storage tank, purge tank, solvent recovery still and filtration system are arranged in a plurality of modules. The modules are in fluid communication with each other through a fluid line for carrying liquified cleaning fluid and a gas line for carrying gaseous cleaning fluid. The fluid line and gas line each include a respective junction for permitting separation of the modules.

Abstract: A liquified gas dry-cleaning system having a cleaning vessel, a rotary basket supported within the cleaning vessel for containing items during cleaning, and a door movable between a closed position sealing the cleaning vessel and an open position for permitting access to the rotary basket and items contained therein. A lint filter is mounted within the cleaning vessel for removing lint and other course particulate matter from the liquified gas wash bath as it is drained from the cleaning vessel following a dry-cleaning cycle. The lint filter has a filter surface which is disposed under a front entry opening of the basket for easy access and manual cleaning each time the cleaning vessel door is opened and items are removed from the basket following a cleaning cycle.

Abstract: A liquified gas dry-cleaning machine having a cleaning vessel with a chamber for containing a wash bath and items to be cleaned, a removable door for sealing the cleaning chamber during a dry-cleaning operation, and a locking ring for retaining the door in closed position. A door opening and closing apparatus is provided which includes a pivot frame for moving the door in an arced path of movement into and out of closed position with the cleaning vessel. The door and locking ring have respective locking lugs with a specifically designed geometry for enabling arced movement of the door into and out of the closed position and for centering the door in aligned relation to the cleaning chamber as an incident to such movement. The locking lugs further have mating locking surfaces designed for point contact in a manner that minimizes stress concentrations at n the roots of the locking ring lugs.