Refrigeration – With indicator or tester – Condition sensing
Patent
1994-03-09
1994-11-15
Sollecito, John M.
Refrigeration
With indicator or tester
Condition sensing
62292, 417544, 417568, G01K 1300
Patent
active
053636660
ABSTRACT:
A manually operated refrigerant recovery device is disclosed that includes a piston/cylinder pump combination, wherein the piston defines opposing fluid chambers in the cylinder. A handle is attached via a connecting rod to the piston. First and second one-way check valves are provided at the pump inlet and outlet to ensure that fluid flows in only one direction through the pump. A pressure relief valve is in fluid communication with the fluid chamber opposite the pump chamber and is continuously manually adjustable between an open position and a closed position. The pressure relief valve is closed upon initial pressurization of the pump to dampen sudden upward movement of the handle and is open during pumping to facilitate manual pumping. In another embodiment, a manually operated refrigerant recovery device is disclosed which includes a piston/cylinder pump combination, wherein the piston defines opposing fluid chambers in the cylinder. First and second one-way check valves are provided at the pump inlet and outlet, wherein the pump outlet is in fluid communication with the pump chamber and the pump inlet is in fluid communication with the fluid chamber opposite the pump chamber. Pressure equalization tubing connects the fluid chambers via a one-way check valve to provide damping against sudden upward movement of the handle.
REFERENCES:
patent: 1284641 (1918-11-01), Francis
patent: 1442641 (1923-01-01), Brandenberger
patent: 1987649 (1935-01-01), Wertz
patent: 3795262 (1974-03-01), Post
patent: 4326867 (1982-04-01), Stokes
patent: 4467620 (1984-08-01), Bradley
patent: 4548088 (1985-10-01), Hood, Jr.
patent: 4698983 (1987-10-01), Hechavarria
patent: 4884410 (1989-12-01), Bell et al.
patent: 5027605 (1991-07-01), Hardesty
patent: 5138847 (1992-08-01), Rollins
"Pumps" (textbook), by Harry L. Stewart, copyrighted 1970, 1975, 1977, and 1984, pp. 236, 237, 248 and 249.
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