Wide frequency pulsation dampener device
AssigneeGreer Hydraulics, Inc.
InventorEldon O. Dryer
Life of this patent
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Abstract
A pulsation dampener device particularly adapted for the efficient dampening of pulsations over a wide frequency range. The device is characterized by the ability to operate over a high temperature range and be operable when contacted by corrosive and like aggressive fluids within which pulses are generated. The device includes a pressure vessel which is cylindrical in section, a piston member shiftable axially within the vessel and dividing the same into a gas chamber and a fluid chamber, the piston incorporating a deflectible diaphragm disposed within a permeable cage whereby dampening may be effected by either or both of a bodily movement of the piston within the vessel or by deflecting movements of the diaphragms within the cage.
Claims11
A hydraulic pulsation dampener device for the dampening of pulses of a wide frequency range in hot or corrosive liquids or the like comprising a pressure vessel having a cylindrical bore, an oil port at one end of said bore, a housing supporting said one end, said housing including a passage in communication with said oil port and adapted to receive fitting means for connecting said passage to a hydraulic line, a closed end formed at the other end of said vessel, said closed end including an elongate tube member, a gas charging port formed in said tube member, a guide bushing formed adjacent said closed end, said bushing including a bearing aperture aligned with the axis of said bore, a by-pass passage surrounding said bearing aperture, a piston rod slidably guided in said aperture for reciprocal movements axially of said bore, a piston head mounted on the end of said rod nearest said oil port, said head including a peripheral seal portion in sliding engagement with said bore and upper and lower spaced perforate cage portions, a diaphragm mounted between said cage portions, said piston head dividing said bore into two isolated chambers in communication, respectively, with said oil port and said gas port.
A hydraulic pulsation dampener device for the dampening of pulses of a wide frequency range in hot or corrosive liquids or the like comprising a pressure vessel having a cylindrical bore, an oil port at one end of said bore, adapted to be connected to a hydraulic line, a closed end formed at the other end of said vessel, a gas charging port formed in said closed end of said vessel, a piston head assembly mounted for reciprocal movement in said bore, said head including a peripheral seal portion in sliding engagement with said bore and upper and lower spaced perforate cage portions, a diaphragm mounted between said cage portions, said diaphragm comprising a resilient polymeric material, said piston dividing said bore into two isolated chambers in communication, respectively, with said oil port and said gas port, said diaphragm being shifted into lining relation of one or the other of said cages selectively responsive to pressure differentials within said chamber, the volume of said chambers being a function of the position of said head in said bore and the position of said diaphragm between said cages.
Dependencies are inferred from the claim text.