US3782422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for periodically supplying measured quantities of a pressure fluid to a nozzle
Assignee: Nv Machinefab L Te Strake nl
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Filing: 1971-04-07
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Granted: 1974-01-01
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Expires: 1991-04-07
Abstract
Abstract A device for periodically supplying measured quantities of a pressure fluid to a nozzle adapted to blow a weft thread into the shed of a pneumatic loom, comprising a metering chamber fed by a pressure fluid source and connected to the nozzle through a periodically opening valve means, control means being provided to influence the behaviour of the weft thread and more particularly to stabilize the position of the weft thread in the fluid jet irrespective of the nature of that thread.
Inventors
- 👤 G Vermeulen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:13
CPC Classifications
D; D03; D03D; D03D47/00; D03D47/28; D03D47/30; D03D47/3026; D03D47/3033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A device for periodically supplying measured quantities of pressure fluid to a nozzle for blowing a weft thread into the shed of a pneumatic loom, comprising a metering chamber which is normally connected to a source of fluid under pressure, and a valve which connects the metering chamber to a blowing nozzle for discharging pressure fluid from the metering chamber, wherein the improvement comprises control means which opens the valve abruptly at the beginning of the weft-inserting portion of the weaving cycle to discharge the metering chamber and holds the valve open during the remainder of such portion of the weaving cycle, and a connection between the metering chamber and the source of fluid under pressure which admits a controlled afterflow of fluid to continue blowing fluid through the nozzle after the fluid stored in the metering chamber is discharged, the valve being formed by a diaphragm movable between two seats in a valve chamber in communication with the metering chamber, one seat being connected to the nozzle and the other seat being connectable by means of the control means alternately with the atmosphere and with the pressure fluid source.
Claim 2
Independent Claim
190 words
A device for periodically supplying measured quantities of pressure fluid to a nozzle for blowing a weft thread into the shed of a pneumatic loom, comprising a metering chamber which is normally connected to a source of fluid under pressure, and a valve which connects the metering chamber to a blowing nozzle for discharging pressure fluid from the metering chamber, wherein the improvement comprises control means which opens the valve abruptly at the beginning of the weft-inserting portion of the weaving cycle to discharge the metering chamber and holds the valve open during the remainder of such portion of the weaving cycle, and a connection between the metering chamber and the source of fluid under pressure which admits a controlled afterflow of fluid to continue blowing fluid through the nozzle after the fluid stored in the metering chamber is discharged, the valve being formed by a diaphragm movable between two seats in a valve chamber in communication with the metering chamber, one seat being connected to the nozzle and the other seat being connectable by means of the control means alternately with the atmosphere and with the pressure fluid source.
References Cited (Backward Citations)
US2662556A
Cited
US3191633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |