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US4627573A
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US
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Pressure compensator/emitter
Assignee: HAVENS INTERNATIONAL Inc A CORP OF CA
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Filing: 1984-02-17
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Granted: 1986-12-09
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Expires: 2004-02-17
Abstract
Abstract A pressure compensating flow control device includes a generally elongated, collapsible tubular body of flexible material such as silicone rubber having a teardrop shaped inlet orifice for extending into a high pressure supply line, an outlet end for distributing a flow of liquid with the inlet orifice and tubular body collapsible in response to pressure to maintain a generally predetermined uniform flow rate over a predetermined pressure range. The inlet end of the tubular member tapers down to a reduced teardrop inlet orifice with the outlet opening in one embodiment comprising a crescent shaped slit in the wall of the tube.
Inventors
- 👤 Glenn G. Havens, deceased
- 👤 executor by Richard C. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:34
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/02; A01G25/023
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
133 words
A pressure compensating flow control device for compensating for irregular pressure for maintaining a predetermined generally uniform flow rate over a predetermined pressure range comprising: a flexible tubular member having collapsible walls of a substantially uniform thickness defining a central bore, an inlet end having an inlet orifice for communicating with a fluid source, and an outlet end having an outlet port; said inlet orifice and outlet port communicating with said central bore, said inlet orifice having a teardrop cross sectional configuration and said central bore collapsing such that as fluid source pressure varies from zero to a first pressure the flow rate increases from zero to a maximum flow rate and as fluid source pressure varies from said first pressure to a second higher pressure said maximum flow rate is substantially maintained.
Claim 2
Dependent Claim
133 words
A pressure compensating flow control device for compensating for irregular pressure for maintaining a predetermined generally uniform flow rate over a predetermined pressure range comprising: a flexible tubular member having collapsible walls of a substantially uniform thickness defining a central bore, an inlet end having an inlet orifice for communicating with a fluid source, and an outlet end having an outlet port; said inlet orifice and outlet port communicating with said central bore, said inlet orifice having a teardrop cross sectional configuration and said central bore collapsing such that as fluid source pressure varies from zero to a first pressure the flow rate increases from zero to a maximum flow rate and as fluid source pressure varies from said first pressure to a second higher pressure said maximum flow rate is substantially maintained.
Claim 3
Dependent Claim
15 words
The pressure compensator of claim 1 wherein said tubular member is constructed of silicone rubber.
Claim 4
Dependent Claim
20 words
The pressure compensator of claim 1 wherein the outlet opening is a slit in the wall of said tubular member.
Claim 5
Dependent Claim
11 words
The pressure compensator of claim 3 wherein said slit is crescent-shaped.
References Cited (Backward Citations)
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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) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |