Patent US3389064A successfully refreshed from Google Patents.
Patent US6644345B2 successfully refreshed from Google Patents.
US6644345B2
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US
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Flow control valve
Assignee: Research By Copperhead Hill Inc
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Filing: 2002-06-24
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Granted: 2003-11-11
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Expires: 2022-06-24
Abstract
Abstract A flow control valve is disclosed having a cylindrical housing having inlet and outlet ends and a central portion there between; a piston slidably disposed within the central portion and having a wall at one end thereof; a piston rod having a base and a top, a filter located within the rod, and a spring surrounding the rod for urging the rod and the piston toward the inlet end; and a flow restrictor through which the rod is able to pass. The flow restrictor has a first portion with one or more inlet ports and a second portion separated from the first portion by an annular ridge.
Inventors
- 👤 Robert Dulin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:17
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/24; F16K17/28; F16K17/30; F16K21/00; F16K21/04; F16K21/06; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; G05D7/0133; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7729; Y10T137/794
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
A flow control valve comprising: a housing having an inlet end adapted for receiving a fluid flow, an outlet end adapted for outputting the fluid flow and a central portion there between; a displaceable timing cup residing within the central portion; a piston having a base, a top, and a stem there between, the stem having a passage from the base to the top; a biasing member disposed around the stem of the piston and adapted to bias the piston toward the inlet end in response to the outlet end receiving fluid flow, wherein the biasing member is substantially immediately compressed when flow begins, thereby enabling movement of the timing cup to be unaffected; and a regulator having a first portion with at least one inlet port adapted for outputting fluid flow passing through the central portion of the housing, a second portion, and a ridge separating the first portion from the second portion.
Claim 2
Dependent Claim
154 words
A flow control valve comprising: a housing having an inlet end adapted for receiving a fluid flow, an outlet end adapted for outputting the fluid flow and a central portion there between; a displaceable timing cup residing within the central portion; a piston having a base, a top, and a stem there between, the stem having a passage from the base to the top; a biasing member disposed around the stem of the piston and adapted to bias the piston toward the inlet end in response to the outlet end receiving fluid flow, wherein the biasing member is substantially immediately compressed when flow begins, thereby enabling movement of the timing cup to be unaffected; and a regulator having a first portion with at least one inlet port adapted for outputting fluid flow passing through the central portion of the housing, a second portion, and a ridge separating the first portion from the second portion.
Claim 3
Dependent Claim
21 words
The flow control valve of claim 1 wherein the timing cup is able to effect turnoff of flow through the valve.
Claim 4
Dependent Claim
41 words
The flow control valve of claim 2 wherein the valve is adapted to receive a variable fluid flow at the inlet end and substantially automatically limit the amount that flows through the valve to the outlet end to a predetermined quantity.
Claim 5
Dependent Claim
29 words
The flow control valve of claim 4 wherein the housing further comprises a timing cup annular seat for communicating with the cup, thereby limiting the travel of the cup.
Claim 6
Dependent Claim
21 words
The flow control valve of claim 2 wherein the housing further comprises a regulator annular seat for communicating with the regulator.
Claim 7
Dependent Claim
27 words
The flow control valve of claim 2 wherein the stem passage is further comprised of a flow restrictor, wherein flow out of the timing cup is regulated.
Claim 8
Dependent Claim
26 words
The flow control valve of claim 2 wherein the tension of the biasing member is selected based upon the speed and volume desired to be regulated.
Claim 9
Dependent Claim
19 words
The flow control valve of claim 2 further comprising a timing cup seal concentrically displaceable about the piston stem.
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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) | 2006-11-10 | 2007-05-12 | 2007-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-11-10 | 2011-05-12 | 2011-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-11-10 | 2015-05-12 | 2015-11-11 | $7700.00 | Window Closed / Lapsed |