Gas charged accumulator with failure indicator
AssigneeMidland-Ross Corporation
InventorThomas R. Soupal
Life of this patent
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Abstract
A gas charged accumulator includes a gas chamber and a hydraulic reservoir on opposite sides of a movable member. A fill passage for pressurizing the gas chamber includes a movable operating device for operating an indicator when the accumulator is substantially discharged. Gas flows directly past the indicator operating device when the gas chamber is pressurized through the fill passage. A normally closed switch assembly is mounted in the fill opening outwardly of the indicator operating device subsequent to pressurization of the gas chamber. The indicator operating device holds the switch assembly in an open position when the accumulator is charged and provides closing of the switch when the accumulator is substantially discharged.
Claims10
A gas chamber having a fill opening through which said chamber is chargeable with gas pressure, indicator means for indicating a discharged condition of said chamber, said indicator means including an indicator operating assembly mounted in said opening, movable pressure responsive indicator operating means for cooperating with said operating assembly to operate said indicator means in response to a discharged condition of said chamber, and said chamber being chargeable with gas pressure through said fill opening and through said pressure responsive indicator operating means when said indicator operating assembly is removed from said opening.
A gas charged hydraulic accumulator having a gas chamber and a hydraulic fluid reservoir on opposite sides of a movable separating member, said gas chamber having a fill passage through which said chamber is pressurized, said reservoir having an opening through which hydraulic fluid flows to and from said reservoir, indicator operating means in said fill passage for operating indicating means indicative of a discharged condition of said reservoir, biasing means for normally biasing said indicator operating means to an indicator operating position, said indicator operating means being responsive to a pressure in said gas chamber representative of a charged condition of said reservoir for movement out of said indicator operating position, said indicator operating means normally blocking flow of gas out of said gas chamber through said fill passage, and bypass means for providing flow through said fill passage into said gas chamber directly past said indicator operating means.
Dependencies are inferred from the claim text.