US3390700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control valves
Assignee: Commercial Shearing Inc
•
Filing: 1965-04-26
•
Granted: 1968-07-02
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Expires: 1985-04-26
Abstract
No abstract record available.
Inventors
- 👤 Robert F Hodgson
- 👤 Arthur J Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:55
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; F16K11/0716; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87233; Y10T137/87241
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
IN A CONTROL VALVE HAVING A BODY, A LONGITUDINAL BORE IN SAID BODY SLIDABLY RECEIVING A VALVE ELEMENT, A VALVE ELEMENT SLIDABLE AXIALLY IN SAID BORE BETWEEN A NEUTRAL AND AT LEAST ONE WORK POSITION IN WHICH WORK POSITION FLUID IS DELIVERED FROM AT LEAST ONE OF A PAIR OF SPACED APART GENERALLY PARALLEL INLETS TRANSVERSE TO AND INTERSECTING THE BORE AND SPACED APART POINTS TO A WORK CHAMBER INTERSECTING SAID BORE AND COMMUNICATING WITH THE EXTERIOR OF THE BODY AND AT LEAST ONE EXHAUST POSITION IN WHICH FLUID IS DELIVERED FROM SAID WORK CHAMBER TO AN ADJACENT EXHAUST CHAMBER INTERSECTING SAID BORE, AND AN EXHAUST PASSAGE CONNECTING SAID EXHAUST CHAMBER WITH A LOW PRESSURE TANK, THE IMPROVEMENT COMPRISING A FIRST PASSAGE EXTENDING THROUGH SAID BODY IN A PLANE SPACED FROM AND PARALLEL TO THE AXIS OF THE BORE, SAID PASSAGE INTERSECTING THE WORK CHAMBER, A SECOND PASSAGE LYING TRANSVERSE TO THE BORE AND COMMUNICATING WITH A LOW PRESSURE TANK, SAID SECOND PASSAGE HAVING MEANS ADAPTED TO BE SELECTIVELY CONNECTED THROUGH SAID FIRST TANK, SAID SECOND PASSAGE BEING INDEPENDENT OF SAID EXHAUST CHAMBER.
Claim 2
Dependent Claim
183 words
IN A CONTROL VALVE HAVING A BODY, A LONGITUDINAL BORE IN SAID BODY SLIDABLY RECEIVING A VALVE ELEMENT, A VALVE ELEMENT SLIDABLE AXIALLY IN SAID BORE BETWEEN A NEUTRAL AND AT LEAST ONE WORK POSITION IN WHICH WORK POSITION FLUID IS DELIVERED FROM AT LEAST ONE OF A PAIR OF SPACED APART GENERALLY PARALLEL INLETS TRANSVERSE TO AND INTERSECTING THE BORE AND SPACED APART POINTS TO A WORK CHAMBER INTERSECTING SAID BORE AND COMMUNICATING WITH THE EXTERIOR OF THE BODY AND AT LEAST ONE EXHAUST POSITION IN WHICH FLUID IS DELIVERED FROM SAID WORK CHAMBER TO AN ADJACENT EXHAUST CHAMBER INTERSECTING SAID BORE, AND AN EXHAUST PASSAGE CONNECTING SAID EXHAUST CHAMBER WITH A LOW PRESSURE TANK, THE IMPROVEMENT COMPRISING A FIRST PASSAGE EXTENDING THROUGH SAID BODY IN A PLANE SPACED FROM AND PARALLEL TO THE AXIS OF THE BORE, SAID PASSAGE INTERSECTING THE WORK CHAMBER, A SECOND PASSAGE LYING TRANSVERSE TO THE BORE AND COMMUNICATING WITH A LOW PRESSURE TANK, SAID SECOND PASSAGE HAVING MEANS ADAPTED TO BE SELECTIVELY CONNECTED THROUGH SAID FIRST TANK, SAID SECOND PASSAGE BEING INDEPENDENT OF SAID EXHAUST CHAMBER.
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) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |