Dispensing – Automatic control – Constant weight – volume or pressure control by output
Patent
1989-04-04
1990-04-24
Rolla, Joseph J.
Dispensing
Automatic control
Constant weight, volume or pressure control by output
222 59, 222 73, 222544, 137501, 13761419, B67D 508, B67D 516
Patent
active
049193058
ABSTRACT:
A fuel dispensing nozzle for refueling vehicles is disclosed. The nozzle provides a poppet valve for manually controlling the flow rate through the nozzle and an automatic flow control regulator for limiting the maximum flow rate through the nozzle to a predetermined maximum flow rate. The illustrated embodiment provides the automatic flow regulator in an existing passage within the nozzle body downstream from the poppet valve. Therefore, the regulator can be retrofitted into existing nozzles without separate fasteners or the like. The regulator includes a polymeric sleeve having lateral ports and a piston slidable in the sleeve providing an orifice around the operating rod of the poppet valve. A spring normally maintains the piston in its full open position. When flow rates approach the maximum desired predetermined flow rate, a pressure drop occurs through the orifice, producing a force overcoming the spring and causing the piston to move down and partially cover the ports in the sleeve. This results in throttling of the flow through the nozzle and limits the flow to rates below the predetermined maximum desired flow rate.
REFERENCES:
patent: 1860046 (1932-05-01), McCutcheon
patent: 2732100 (1956-01-01), Jackson et al.
patent: 3088500 (1963-05-01), Payne
patent: 4275764 (1981-06-01), Baret
patent: 4537219 (1985-08-01), Milish
Emco Wheaton Inc.
Reiss Steven M.
Rolla Joseph J.
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