Patent US4893646A successfully refreshed from Google Patents.
US4893646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure regulator
Assignee: Tektronix Inc
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Filing: 1988-04-28
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Granted: 1990-01-16
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Expires: 2008-04-28
Abstract
Abstract A fluid pressure regulator comprises a housing defining a cylindrical chamber, an inlet opening for introducing fluid under pressure into the chamber, an outlet opening for allowing fluid to leave the chamber at a regulated pressure, and a bleed orifice in communication with a space at constant pressure. The outlet opening and the inlet opening are in open communication. A ferromagnetic piston member is fitted in the chamber and is slidable within a range of positions such that the bleed orifice is partially covered by the piston. The ferromagnetic piston member is biased at a substantially constant force when it is that range of positions.
Inventors
- 👤 Guenther W. Wimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:21
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/20; G05D16/2086; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/264; Y10T137/2642; Y10T137/7722; Y10T137/7758; Y10T137/7761
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
145 words
A fluid pressure regulator comprising: a housing defining a cylindrical chamber, an inlet opening for introducing fluid into the chamber, an outlet opening for allowing fluid to leave the chamber, the outlet opening being in open communication with the inlet opening, and a bleed orifice in communication with a space at constant pressure, a source of fluid under pressure connected to the inlet opening, a piston member of ferromagnetic material fitted in the chamber and slidable therein within a range of positions such that the bleed orifice is partially covered by the piston member, and magnetic means which bias the piston member at a substantially constant force when it is within said range of positions, the magnetic means comprising an electrical conductor having first and second opposite terminals and a current source connected to said terminals for supplying a flow of current through the conductor.
Claim 2
Dependent Claim
145 words
A fluid pressure regulator comprising: a housing defining a cylindrical chamber, an inlet opening for introducing fluid into the chamber, an outlet opening for allowing fluid to leave the chamber, the outlet opening being in open communication with the inlet opening, and a bleed orifice in communication with a space at constant pressure, a source of fluid under pressure connected to the inlet opening, a piston member of ferromagnetic material fitted in the chamber and slidable therein within a range of positions such that the bleed orifice is partially covered by the piston member, and magnetic means which bias the piston member at a substantially constant force when it is within said range of positions, the magnetic means comprising an electrical conductor having first and second opposite terminals and a current source connected to said terminals for supplying a flow of current through the conductor.
Claim 3
Dependent Claim
34 words
A fluid pressure regulator according to claim 1, further comprising a spring which urges the piston member towards a position in which the bleed orifice is effectively isolated from the inlet and outlet openings.
Claim 4
Dependent Claim
23 words
A fluid pressure regulator according to claim 1, wherein the conductor is in the form of a coil which coaxially surrounds the housing.
Claim 5
Dependent Claim
41 words
A fluid pressure regulator according to claim 1, comprising means for sensing the pressure at which fluid leaves the chamber, and means for adjusting the current supplied by the current source in response to the pressure sensed by the pressure sensor.
Claim 6
Dependent Claim
211 words
In combination, a source of fluid under pressure, a consuming device for consuming the fluid under pressure, and a fluid pressure regulator for controlling supply of fluid under pressure from the source to the consuming device, said fluid pressure regulator comprising: a housing defining a cylindrical chamber, an inlet opening connected to the source of fluid under pressure for introducing fluid into the chamber, an outlet opening in open communication with the inlet opening and connected to the consuming device for supplying a flow of fluid to the consuming device, and a bleed orifice in communication with a space at constant pressure, a piston member fitted in the chamber and slidable therein within a range of positions such that the bleed orifice is partially covered by the piston member, magnetic means which bias the piston member at a substantially constant force when it is within said range of positions, the magnetic means comprising an electrical conductor having first and second opposite terminals and a current source connected to said terminals for supplying a flow of current through the conductor, means for sensing the pressure at which fluid leaves the chamber, and means for adjusting the current supplied by the current source in response to the pressure sensed by the pressure sensor.
Claim 7
Dependent Claim
211 words
In combination, a source of fluid under pressure, a consuming device for consuming the fluid under pressure, and a fluid pressure regulator for controlling supply of fluid under pressure from the source to the consuming device, said fluid pressure regulator comprising: a housing defining a cylindrical chamber, an inlet opening connected to the source of fluid under pressure for introducing fluid into the chamber, an outlet opening in open communication with the inlet opening and connected to the consuming device for supplying a flow of fluid to the consuming device, and a bleed orifice in communication with a space at constant pressure, a piston member fitted in the chamber and slidable therein within a range of positions such that the bleed orifice is partially covered by the piston member, magnetic means which bias the piston member at a substantially constant force when it is within said range of positions, the magnetic means comprising an electrical conductor having first and second opposite terminals and a current source connected to said terminals for supplying a flow of current through the conductor, means for sensing the pressure at which fluid leaves the chamber, and means for adjusting the current supplied by the current source in response to the pressure sensed by the pressure sensor.
Claim 8
Dependent Claim
25 words
A combination according to claim 5, wherein the piston member is made of ferromagnetic material and is in magnetically coupled relationship with the magnetic means.
Claim 9
Dependent Claim
32 words
A combination according to claim 5, further comprising a spring which biases the piston member towards a position in which the bleed orifice is effectively isolated from the inlet and outlet openings.
Claim 10
Dependent Claim
30 words
A combination according to claim 5, wherein the piston member is made of ferromagnetic material and the conductor is in the form of a coil which coaxially surrounds the housing.
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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) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |