Pressure pulse dampener device

Claim 2

A pressure pulse dampener comprising a pressure vessel having a movable partition therein defining two chambers each having a port in communication therewith, one of said ports defining a gas port for charging of one of said chambers with gas under pressure and the other an oil port, an oil port assembly comprising a hollow sleeve axially aligned with said oil port and rigidly secured at one end thereto and in communication therewith, said sleeve having a partition therein extending diametrically thereacross defining two chambers extending longitudinally of said sleeve, each having one end spaced outwardly from said oil port, said sleeve having two spaced, diametrically aligned openings therethrough extending transversely into said sleeve and in communication respectively with said longitudinal chambers, said sleeve partition having fluid passage means therethrough transversely aligned with said two openings, whereby a tortuous path is provided for oil under pressure from one of said openings to the other of said openings, said oil port being in communication with said tortuous path, said fluid passage means providing a direct path from one of said openings to the other of said openings for a portion of the oil entering said first opening.

Claim 3

The combination set forth in claim 1 in which the cross sectional area of said fluid passage means is less than that of the first opening.

Claim 4

The combination set forth in claim 1 in which a valve seat is provided in said oil port coaxial with said sleeve, a valve member is associated with said seat, resilient means reacting against said valve member normally urging it away from said seat, the ports of said pressure vessel being axially aligned, said movable partition comprising a deformable bladder having a mouth at one end in communication with said gas port and being closed at its other end, said closed end being adapted to move against said valve member to urge the latter against said seat.

Claim 5

The combination set forth in claim 3 in which said valve member has a stem affixed at one end thereto and extending axially through said sleeve, means in said sleeve slidably to guide said stem, means to limit the movement of said valve member away from said valve seat.

Claim 6

The combination set forth in claim 3 in which the partition in said sleeve has a longitudinal bore therethrough axially aligned with said sleeve, said valve member has a stem affixed at one end thereto and extending through the bore of said partition for slidable movement of said stem and means to limit the movement of said valve member away from said valve seat.

Claim 7

The combination set forth in claim 1 in which said oil port assembly comprises a block having a longitudinal bore therethrough, said sleeve extending through said bore, said block having a pair of opposed transversely aligned bores leading into said longitudinal bore and aligned respectively with the openings in said sleeve, said bores defining an inlet port and an outlet port respectively, means releasably to retain said block in fixed position on said sleeve.

Claim 8

The combination set forth in claim 6 in which said sleeve has a reduced outer diameter portion defining an annular shoulder, the bore of said block encompasses said reduced diameter portion, one end of said block abutting against said annular shoulder, said sleeve being internally threaded at its outer end, a cap having a reduced diameter portion defining an annular shoulder, said reduced diameter portion being externally threaded to engage the internal threads of said, whereby when said cap is screwed into locking position the annular shoulder thereof will abut against the block to retain the latter against the annular shoulder of said sleeve.

Claim 9

The combination set forth in claim 1 in which the inner end of said sleeve in said oil port defines a valve seat, a valve member associated with said seat, resilient means reacting against said valve member normally urging it away from said seat, the ports of said pressure vessel being axially aligned, said movable partition comprising a deformable bladder having a mouth at one end in communication with said gas port and being closed at its other end, said closed end being adapted to move against said valve member to urge the latter against said seat, the inner end of said sleeve partition being spaced from the transverse plane of said valve seat to provide constant communication between said longitudinal chambers, said partition having at least one opening therethrough transversely aligned with said sleeve openings to define said passageway means.

Claim 10

The combination set forth in claim 3 in which the partition in said sleeve has a longitudinal bore therethrough axially aligned with said sleeve, said valve member has a stem affixed at one end thereto and extending through the bore of said partition for slidable movement of said stem, a block having a longitudinal bore therethrough, said sleeve extending through said longitudinal bore, means releasably to retain said block in fixed position on said sleeve, said block having a pair of opposed transversely aligned bores leading into said longitudinal bore and aligned respectively with the openings in said sleeve, said bores defining an inlet port and an outlet port respectively.

Claim 11

The combination set forth in claim 3 in which the partition in said sleeve has a longitudinal bore therethrough axially aligned with said sleeve, said valve member has a stem affixed at one end thereto and extending through the bore of said partition for slidable movement of said stem, a block having a longitudinal bore therethrough, said sleeve extending through said longitudinal bore, a cup-shaped cap coacting with the outer end of said sleeve and the adjacent portion of said block releasably to retain said block in fixed position on said sleeve, the outer end of said valve stem being positioned in the cavity of said cap, means mounted on the outer end of the valve stem to limit the movement of the valve member away from its seat, said block having a pair of opposed transversely aligned bores leading into said longitudinal bore and aligned respectively with the openings in said sleeve, said bores defining an inlet port and outlet port respectively, the end of the longitudinal chamber in communication with the inlet port and adjacent said cap being closed, and the end of the longitudinal chamber in communication with the outlet port and adjacent said cap being open and in communication with the cavity in said cap.

Claim 12

The combination set forth in claim 10 in which means are provided in said cavity resiliently to limit the movement of said valve member away from said valve seat.

Claim 13

A pressure pulse dampener comprising a pressure vessel having a movable partition therein defining two chambers each having a port in communication therewith, one of said ports defining a gas port for charging of one of said chambers with gas under pressure and the other an oil port, an oil port assembly comprising a hollow sleeve having an opening axially aligned with said oil port, said sleeve being rigidly secured to said oil port and in communication therewith, said sleeve having a partition therein extending diametrically thereacross defining two chambers, said partition extending longitudinally of said oil port and being substantially axially aligned therewith, each chamber having one end spaced outwardly from said oil port, said sleeve having two spaced openings extending into said sleeve and in communication respectively with said chambers, said sleeve partition having fluid passage means therethrough aligned with said two openings, whereby a first tortuous path is provided for oil under pressure from one of said openings to the other of said openings, said oil port being in communication with said tortuous path, and a second direct path is provided by said fluid passage means from one of said openings to the other of said openings for a portion of the oil under pressure entering said first spaced opening.

Claim 14

A pressure pulse dampener comprising a pressure vessel having a movable partition therein defining two chambers each having a port in communication therewith, one of said ports defining a gas port for charging of one of said chambers with gas under pressure and the other an oil port, an oil port assembly comprising a hollow sleeve having an opening axially aligned with said oil port, said sleeve being rigidly secured to said oil port and in communication therewith, said sleeve having a partition therein extending diametrically thereacross defining two chambers, said partition extending longitudinally of said oil port and being substantially axially aligned therewith, each chamber having one end spaced outwardly from said oil port, said sleeve having two spaced openings extending into said sleeve and in communication respectively with said chambers, said sleeve partition having fluid passage means therethrough aligned with said two openings, whereby a first tortuous path is provided for oil under pressure from one of said openings to the other of said openings, said oil port being in communication with said tortuous path, and a second direct path is provided by said fluid passage means from one of said openings to the other of said openings for a portion of the oil under pressure entering said first spaced opening.