Accumulator charging valve

Power plants – Pressure fluid source and motor – Pulsator


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60418, 60562, 60582, 137117, 91460, G05D 1500




The charging valve comprises a pressure port connected with a pressurized fluid source, a first user port which is connectible to a first user component, a second user port which is connectible to an accumulator and to a second user component of the closed center type and a valve device which is switchable dependent upon the pressure existing in the accumulator. The valve device, below a predetermined pressure in the accumulator, connects the pressure via a throttle with the second user port and, above a predetermined pressure in the accumulator, connects the pressure with the first user port. The valve device includes a closing valve which is controlled by a control pressure and the closing valve closes the connection of the pressure port with the first user port, if the pressure in the accumulator is below the predetermined pressure. Further, the closing valve can only be closed by the control pressure if the center of the second user component is open. Thus, the fluid source only delivers fluid under high pressure if the second user component is in operation.

patent: 3886848 (1975-06-01), Budecker et al.
patent: 3995529 (1976-12-01), Bach et al.
patent: 4016895 (1977-04-01), Budecker
patent: 4057073 (1977-11-01), Adams
patent: 4072011 (1978-02-01), Ewald
patent: 4084604 (1978-04-01), Budecker et al.
patent: 4130127 (1978-12-01), Budecker et al.


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