Patent US4967372A successfully refreshed from Google Patents.
US4497388A
Expired / Lapsed
US
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Pulsation dampener and acoustic attenuator
Assignee: SPX Flow Technology Systems Inc
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Filing: 1981-12-03
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Granted: 1985-02-05
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Expires: 2001-12-03
Abstract
Abstract A pulsation dampener and acoustic attenuator for hydraulic systems is designed to be inserted into a liquid flow line. The dampener is a flow-through device with a pressurized bladder restrained within a perforated sleeve. The arrangement of inlet/outlet ports, the bladder, and the screen provides means for dampening flow pulsations in the supply system to effect a more uniform flow and to attenuate acoustic noises reverberating within the system. The dampener provides for self-cleaning due to the flow of the liquid and is thus suitable for sanitary applications. Further, the bladder may be readily removed through one end of the dampener without otherwise removing the dampener from the pipeline in order to examine or replace the bladder.
Inventors
- 👤 Edwin Dexter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:31
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/04; F16L55/045; F16L55/05; F16L55/052; F16L55/053
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
151 words
A pipeline pulsation dampener of the type mounted in series with a pipeline for flow of liquid through the dampener, comprising: a housing comprising a single tubular member having ports for connecting the housing in series with the pipeline one port extending through a side of the housing near a first end thereof to cause a significant change in direction of liquid flow at that port and the other port being centered at a second end of the housing; a restraining screen member enclosed entirely within the housing with an annular orifice provided at the second port between the housing and a closed nose of the restraining screen; and a deformable bladder, within the screen, containing a pressurized fluid, the bladder being attached to only the first end of the housing and being removable from the housing through that end while the housing is connected at the ports to the pipeline.
Claim 2
Dependent Claim
151 words
A pipeline pulsation dampener of the type mounted in series with a pipeline for flow of liquid through the dampener, comprising: a housing comprising a single tubular member having ports for connecting the housing in series with the pipeline one port extending through a side of the housing near a first end thereof to cause a significant change in direction of liquid flow at that port and the other port being centered at a second end of the housing; a restraining screen member enclosed entirely within the housing with an annular orifice provided at the second port between the housing and a closed nose of the restraining screen; and a deformable bladder, within the screen, containing a pressurized fluid, the bladder being attached to only the first end of the housing and being removable from the housing through that end while the housing is connected at the ports to the pipeline.
Claim 3
Dependent Claim
36 words
A pipeline pulsation dampener as claimed in claim 1 further comprising a pneumatic valve extending from the bladder and protruding through the end of the housing for filling the bladder within the assembly with pressurized gas.
Claim 4
Dependent Claim
37 words
A pipeline pulsation dampener as claimed in claim 1 or 2 wherein the bladder is mounted to an end plate which is held to the main body of the housing by means of a readily removable clamp.
Claim 5
Dependent Claim
27 words
A pipeline pulsation dampener as claimed in claim 1 further comprising radial fins between the housing and the restraining screen to center the screen within the housing.
Claim 6
Dependent Claim
146 words
A pipeline pulsation dampener of the type mounted in series with a pipeline for flow of liquid through the dampener, comprising: an extended housing comprising a single tubular member having a port at and near each end thereof for connecting the housing in series with the pipeline, one of the ports defining an inlet and the other defining an outlet, at least one of the ports being through a side of the housing to cause a significant change in direction of liquid flow at that port; an extended screen member within the housing, the screen member having a perforated and non-perforated portion, the non-perforated portion thereof facing the inlet port to deflect liquid entering the housing through that port; and an extended deformable bladder, containing a pressurized fluid, within the screen member and extending along a substantial length of the perforated portion of the screen member.
Claim 7
Dependent Claim
146 words
A pipeline pulsation dampener of the type mounted in series with a pipeline for flow of liquid through the dampener, comprising: an extended housing comprising a single tubular member having a port at and near each end thereof for connecting the housing in series with the pipeline, one of the ports defining an inlet and the other defining an outlet, at least one of the ports being through a side of the housing to cause a significant change in direction of liquid flow at that port; an extended screen member within the housing, the screen member having a perforated and non-perforated portion, the non-perforated portion thereof facing the inlet port to deflect liquid entering the housing through that port; and an extended deformable bladder, containing a pressurized fluid, within the screen member and extending along a substantial length of the perforated portion of the screen member.
Claim 8
Dependent Claim
43 words
A pipeline pulsation dampener as claimed in claim 5 wherein the bladder is attached to only one end of the housing and is removable from the housing through that end while the housing is connected at one of the ports to the pipeline.
Claim 9
Dependent Claim
36 words
A pipeline pulsation dampener as claimed in claim 6 further comprising a pneumatic valve extending from the bladder and protruding through the end of the housing for filling the bladder within the assembly with pressurized gas.
Claim 10
Dependent Claim
37 words
A pipeline pulsation dampener as claimed in claim 6 or 7 wherein the bladder is mounted to an end plate which is held to the main body of the housing by means of a readily removable clamp.
Claim 11
Dependent Claim
44 words
A pipeline pulsation dampener as claimed in claim 6 wherein the other of said ports is centered at the opposite end of the housing and an annular orifice is provided at that port between the housing and a closed nose of the restraining screen.
Claim 12
Dependent Claim
27 words
A pipeline pulsation dampener as claimed in claim 9 further comprising radial fins between the housing and the restraining screen to center the screen within the housing.
Claim 13
Dependent Claim
128 words
A pipeline pulsation dampener of the type mounted in series with the pipeline for flow of liquid through the dampener, comprising: an extended housing having ports for connecting the housing in series with the pipeline, one of the ports being through a side of the housing near one end thereof and the other port being centered at the opposite end of the housing; an extended restraining screen within the housing, the screen having a closed nose adjacent to the centered port; and a deformable bladder, within the screen, containing a pressurized fluid, the bladder being attached to only one end of the housing opposite to the centered port and being removable from the housing through that end while the housing is connected at the ports to the pipeline.
Claim 14
Dependent Claim
128 words
A pipeline pulsation dampener of the type mounted in series with the pipeline for flow of liquid through the dampener, comprising: an extended housing having ports for connecting the housing in series with the pipeline, one of the ports being through a side of the housing near one end thereof and the other port being centered at the opposite end of the housing; an extended restraining screen within the housing, the screen having a closed nose adjacent to the centered port; and a deformable bladder, within the screen, containing a pressurized fluid, the bladder being attached to only one end of the housing opposite to the centered port and being removable from the housing through that end while the housing is connected at the ports to the pipeline.
Claim 15
Dependent Claim
36 words
A pipeline pulsation dampener as claimed in claim 11 further comprising a pneumatic valve extending from the bladder and protruding through the end of the housing for filling the bladder within the assembly with pressurized gas.
Claim 16
Dependent Claim
37 words
A pipeline pulsation dampener as claimed in claim 11 or 12 wherein the bladder is mounted to an end plate which is held to the main body of the housing by means of a readily removable clamp.
Claim 17
Dependent Claim
27 words
A pipeline pulsation dampener as claimed in claim 11 further comprising radial fins between the housing and the restraining screen to center the screen within the housing.
Claim 18
Dependent Claim
161 words
A pipeline pulsation dampener of the type mounted in series with the pipeline for flow of liquid through the dampener, comprising: an extended housing having ports for connecting the housing in series with the pipeline, one of the ports being through a side of the housing near one end thereof and the other port being centered at the opposite end of the housing; an extended restraining screen within the housing, the screen having a closed nose adjacent to the centered port and radial fins at that nose for centering the screen within the housing; and a deformable, elastomeric bladder, within the screen, containing a pressurized fluid, the bladder being attached to a plate clamped to the main body of the housing at the end of the housing opposite to the centered port by means of a valve stem assembly, and the bladder being removable from the housing through that end while the housing is connected at the ports to the pipeline.
Claim 19
Dependent Claim
161 words
A pipeline pulsation dampener of the type mounted in series with the pipeline for flow of liquid through the dampener, comprising: an extended housing having ports for connecting the housing in series with the pipeline, one of the ports being through a side of the housing near one end thereof and the other port being centered at the opposite end of the housing; an extended restraining screen within the housing, the screen having a closed nose adjacent to the centered port and radial fins at that nose for centering the screen within the housing; and a deformable, elastomeric bladder, within the screen, containing a pressurized fluid, the bladder being attached to a plate clamped to the main body of the housing at the end of the housing opposite to the centered port by means of a valve stem assembly, and the bladder being removable from the housing through that end while the housing is connected at the ports to the pipeline.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |