US4157808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision flow controller
Assignee: Integrated Flow Systems Inc
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Filing: 1977-11-14
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Granted: 1979-06-12
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Expires: 1997-11-14
Abstract
Abstract An improved flow-controlling mechanism utilizes interference-fitting components and static seals to assure accurate and repeatable fluid flow-controlling settings and to eliminate a leakage deteriorating seals.
Inventors
- 👤 Alva A. Eidsmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:13
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
Flow-controlling apparatus comprising: a valve body having a pair of fluid ports spaced apart therewithin and having an aperture of selected diameter communicating with the fluid ports; a valve stem disposed to fit within said aperture and having a dimesion larger than the selected dimension of said aperture of at least one of said valve body and valve stem being formed of a deformable, resilient material to facilitate interference fit of the valve stem within the aperture; said valve stem having a groove in the surface thereof which tapers in cross section with length along the valve stem; a radially-extending flange on said valve stem forming a flexible diaphragm; housing means disposed to clamp the outer periphery of said flange against the valve body to form a fluid-tight seal therewith and to clamp the flange against rotation relative to the valve body; means coupled to the valve stem for selectively altering the translational position thereof within said aperture.
Claim 2
Dependent Claim
158 words
Flow-controlling apparatus comprising: a valve body having a pair of fluid ports spaced apart therewithin and having an aperture of selected diameter communicating with the fluid ports; a valve stem disposed to fit within said aperture and having a dimesion larger than the selected dimension of said aperture of at least one of said valve body and valve stem being formed of a deformable, resilient material to facilitate interference fit of the valve stem within the aperture; said valve stem having a groove in the surface thereof which tapers in cross section with length along the valve stem; a radially-extending flange on said valve stem forming a flexible diaphragm; housing means disposed to clamp the outer periphery of said flange against the valve body to form a fluid-tight seal therewith and to clamp the flange against rotation relative to the valve body; means coupled to the valve stem for selectively altering the translational position thereof within said aperture.
Claim 3
Dependent Claim
14 words
Flow-controlling appartus as in claim 1 wherein said valve stem is formed of TEFLON.
Claim 4
Dependent Claim
33 words
Flow-controlling apparatus as in claim 1 wherein the valve body and the valve stem are each formed of a deformable resilient material to facilitate interference fit of the valve stem within the aperture.
Claim 5
Dependent Claim
17 words
Flow-controlling apparatus as in claim 3 wherein the valve body and valve stem are formed of TEFLON.
Claim 6
Dependent Claim
25 words
Flow-controlling apparatus as in claim 1 wherein the radially-extending flange is integrally formed on the valve stem near an end thereof remote from the groove.
Claim 7
Dependent Claim
16 words
Flow-controlling apparatus as in claim 5 wherein the valve stem and flange are formed of TEFLON.
Claim 8
Dependent Claim
66 words
Flow-controlling apparatus as in claim 1 wherein: said means includes a plunger attached to said stem and including a threaded portion thereon; and manually rotatable knob means rotatably mounted with respect to the valve body and having a threaded portion engaged with the threaded portion on said plunger for translating the plunger and the valve stem attached thereto in response to rotation of the knob means.
Claim 9
Dependent Claim
62 words
Flow-controlling apparatus as in claim 1 comprising stem means integrally formed intermediate the valve stem and flange and having a selected outer dimension; and said valve body includes an opening therein aligned with said aperture and having a dimension slightly greater than the selected outer dimension of the stem means to provide a guide for translational movement of the stem means therewithin.
References Cited (Backward Citations)
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Cited
US2675204A
Cited
US2980392A
Cited
US3511470A
Cited
US3557833A
Cited
US3985336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |