US3570521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual pressure range valve
Assignee: AT&T Inc
•
Filing: 1969-02-04
•
Granted: 1971-03-16
•
Expires: 1989-02-04
Abstract
Abstract Dual pressure range valve for alternately providing high pressure and low pressure fluid over a single line, the valve including a body having a high pressure fluid inlet port and a low pressure fluid inlet port, both the inlet ports being alternately communicable with a fluid outlet port. Communication of the fluid outlet port with the high pressure or low pressure fluid inlet port is established by the positioning of reciprocable means mounted within the valve body.
Inventors
- 👤 Duane L Kirschenman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:54
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B11/00; F15B11/02; F15B11/028; F15B11/032; F15B11/0325; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/20576; F15B2211/20592; F15B2211/50; F15B2211/505; F15B2211/50554; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/775; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567; Y10T137/2569
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
472 words
A dual pressure range valve comprising: an elongated body having a first bore extending axially therethrough; a first inlet port formed at one end of said first bore for accommodating the introduction of fluid at a first pressure into said first bore of said body; an outlet port formed at the opposite end of said first bore for accommodating the discharge of fluid therethrough from said first bore of said body, said outlet port tapered conically outward toward the periphery of said first bore at its innermost end section; said body having a second bore extending transversely therein one end of said second bore intersecting said first bore so as to communicate therewith; second inlet port formed at the other end of said second bore for accommodating the introduction of fluid at a second pressure into said first bore of said body; a pair of longitudinally displaced radially inwardly extending annular shoulders formed on said first bore of said body, said second bore communicating with said first bore at a point between said pair of annular shoulders; an elongated reciprocable check piston slidably mounted for axial movement within said pair of shoulders of said first bore to alternately open and close said communication between said second bore and said first bore during the passage of fluid through said first bore, said piston having affixed thereto an outward extending annular sleeve situated externally of the outermost of said pair of shoulders on said first bore and engageable therewith to limit said axial movement of said piston having a longitudinal bore therethrough, said bore of said piston tapered conically outward at its innermost end section; and an elongated stem-check valve mounted within said bore of said piston, said stem check having a flared plug at its innermost end which protrudes from said bore of said piston, said plug having a first complementary conical surface adjacent said conical surface of said bore of said piston, a second complementary conical surface adjacent said conical surface of said outlet port, and a plurality of passages extending from said first conical surface through a third surface of said plug adjacent the bore in said outlet port, said stem check reciprocable within said bore of said piston during the reciprocal movement of said piston so that sAid first conical surface of said plug movably engages adjacent conical surface of said bore of said piston to preclude fluid passage from said first inlet port to said outlet port when said piston opens said communication between said second bore and said first bore, and said second conical surface of said plug is alternately movably engages with said adjacent conical surface of said outlet port to permit fluid passage from said first inlet port to said outlet port when said piston closes said communication between said second bore and said first bore.
Claim 2
Dependent Claim
472 words
A dual pressure range valve comprising: an elongated body having a first bore extending axially therethrough; a first inlet port formed at one end of said first bore for accommodating the introduction of fluid at a first pressure into said first bore of said body; an outlet port formed at the opposite end of said first bore for accommodating the discharge of fluid therethrough from said first bore of said body, said outlet port tapered conically outward toward the periphery of said first bore at its innermost end section; said body having a second bore extending transversely therein one end of said second bore intersecting said first bore so as to communicate therewith; second inlet port formed at the other end of said second bore for accommodating the introduction of fluid at a second pressure into said first bore of said body; a pair of longitudinally displaced radially inwardly extending annular shoulders formed on said first bore of said body, said second bore communicating with said first bore at a point between said pair of annular shoulders; an elongated reciprocable check piston slidably mounted for axial movement within said pair of shoulders of said first bore to alternately open and close said communication between said second bore and said first bore during the passage of fluid through said first bore, said piston having affixed thereto an outward extending annular sleeve situated externally of the outermost of said pair of shoulders on said first bore and engageable therewith to limit said axial movement of said piston having a longitudinal bore therethrough, said bore of said piston tapered conically outward at its innermost end section; and an elongated stem-check valve mounted within said bore of said piston, said stem check having a flared plug at its innermost end which protrudes from said bore of said piston, said plug having a first complementary conical surface adjacent said conical surface of said bore of said piston, a second complementary conical surface adjacent said conical surface of said outlet port, and a plurality of passages extending from said first conical surface through a third surface of said plug adjacent the bore in said outlet port, said stem check reciprocable within said bore of said piston during the reciprocal movement of said piston so that sAid first conical surface of said plug movably engages adjacent conical surface of said bore of said piston to preclude fluid passage from said first inlet port to said outlet port when said piston opens said communication between said second bore and said first bore, and said second conical surface of said plug is alternately movably engages with said adjacent conical surface of said outlet port to permit fluid passage from said first inlet port to said outlet port when said piston closes said communication between said second bore and said first bore.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |