Patent US5766968A successfully refreshed from Google Patents.
Patent US3829027A successfully refreshed from Google Patents.
US3829027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable vacuum producing nozzle
Assignee: S R C LAB INC US
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Filing: 1973-02-28
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Granted: 1974-08-13
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Expires: 1993-02-28
Abstract
Abstract A nozzle having a through passageway with an intermediate slot connected to a source of pressurized fluid with the flow of pressurized fluid inducing flow of ambient fluid into the entrance and through the passageway and in which the area of the entrance to the passageway through which the ambient fluid may flow is decreased to increase the extent of the vacuum produced by the nozzle to thereby provide a lower absolute pressure at the entrance.
Inventors
- 👤 Z Mocarski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:26
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/48; F04F5/46; F04F5/461; Y; Y10; Y10S; Y10S239/00; Y10S239/07
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
174 words
A nozzle for producing a flow through a conduit comprising a member having a through passageway formed with an entrance, an exit and an intermediate slot, means connecting the slot to a source of pressurized fluid and means connecting the entrance to the conduit whereby flow of pressurized fluid through the slot and out the exit induces flow of ambient fluid into the entrance, through the passageway and out the exit and means for restricting the flow of ambient fluid to the entrance to thereby increase the extent of the differential pressure existing between the entrance and the exit, in which the restricting means is mounted for relative movement and means for varying the restricting means inversely with the extent of the differential pressure between the entrance and exit and in which the restricting means includes a stationary plug, means mounting the passageway member for movement towards and away from the plug and means for utilizing the difference in pressure between the entrance and exit for providing a force tending to move the member.
Claim 2
Dependent Claim
174 words
A nozzle for producing a flow through a conduit comprising a member having a through passageway formed with an entrance, an exit and an intermediate slot, means connecting the slot to a source of pressurized fluid and means connecting the entrance to the conduit whereby flow of pressurized fluid through the slot and out the exit induces flow of ambient fluid into the entrance, through the passageway and out the exit and means for restricting the flow of ambient fluid to the entrance to thereby increase the extent of the differential pressure existing between the entrance and the exit, in which the restricting means is mounted for relative movement and means for varying the restricting means inversely with the extent of the differential pressure between the entrance and exit and in which the restricting means includes a stationary plug, means mounting the passageway member for movement towards and away from the plug and means for utilizing the difference in pressure between the entrance and exit for providing a force tending to move the member.
Claim 3
Dependent Claim
103 words
A nozzle for producing a flow of ambient fluid through a conduit comprising a member having a through passageway formed with an entrance, an exit and an intermediate slot, means connecting the slot to a source of pressurized fluid and means connecting the entrance to the conduit whereby flow of pressurized fluid through the slot and out the exit induces flow of ambient fluid into the entrance, through the passageway and out the exit and adjustable means for restricting the flow of ambient fluid into the entrance in accordance with the extent of the differential pressure existing between the entrance and the exit.
Claim 4
Dependent Claim
103 words
A nozzle for producing a flow of ambient fluid through a conduit comprising a member having a through passageway formed with an entrance, an exit and an intermediate slot, means connecting the slot to a source of pressurized fluid and means connecting the entrance to the conduit whereby flow of pressurized fluid through the slot and out the exit induces flow of ambient fluid into the entrance, through the passageway and out the exit and adjustable means for restricting the flow of ambient fluid into the entrance in accordance with the extent of the differential pressure existing between the entrance and the exit.
Claim 5
Dependent Claim
52 words
The invention as defined in claim 2 in which the restricting means includes a pair of surfaces located adjacent the entrance between which ambient fluid flows and in which one of the surfaces is movable with respect to the other to thereby vary the size therebetween through which the ambient fluid flows.
Claim 6
Dependent Claim
45 words
The invention as defined in claim 3 in which one of the surfaces is formed at the entrance and converges toward the exit, in which the restricting means includes a plug having the other surface and in which the other surface converges towards the entrance.
Claim 7
Dependent Claim
46 words
The invention as defined in claim 4 in which the another converging surface terminates with a front portion that is postionable within the passageway and in which there remains an area between the entrance converging surface and the plug converging surface for flow of ambient fluid.
Claim 8
Dependent Claim
29 words
The iNvention as defined in claim 2 in which the adjustable means varies the restriction inversely with the extent of the difference in pressure between the entrance and exit.
Claim 9
Dependent Claim
107 words
A nozzle for producing fluid flow comprising a member formed to have a through passageway with an entrance and an exit, inlet means for directing a flow of pressurized fluid into the passageway and intake means connecting the entrance with a source of secondary fluid whereby flow of pressurized fluid through the passageway and out the exit induces flow of secondary fluid through the intake means into the entrance, through the passageway and out the exit and adjustable means for varying the size of the intake means in accordance with the difference in pressure existing at the exit and of the secondary fluid at the intake means.
Claim 10
Dependent Claim
107 words
A nozzle for producing fluid flow comprising a member formed to have a through passageway with an entrance and an exit, inlet means for directing a flow of pressurized fluid into the passageway and intake means connecting the entrance with a source of secondary fluid whereby flow of pressurized fluid through the passageway and out the exit induces flow of secondary fluid through the intake means into the entrance, through the passageway and out the exit and adjustable means for varying the size of the intake means in accordance with the difference in pressure existing at the exit and of the secondary fluid at the intake means.
Claim 11
Dependent Claim
40 words
The invention as defined in claim 7 in which the adjustable means includes a movable portion responsive to the difference in pressure and in which the movable portion reduces the size of the intake means as the pressure difference increases.
Claim 12
Dependent Claim
39 words
The invention as defined in claim 8 in which the adjustable means includes means for urging the movable portion to increase the size of the intake means against the action of the pressure difference tending to reduce the size.
Claim 13
Dependent Claim
57 words
The invention as defined in claim 7 in which the adjustable means includes a stationary portion and a movable portion with the latter being mounted for movement toward and away from the stationary portion and in which the intake means is formed between a surface on the movable portion and an adjacent surface on the stationary portion.
Claim 14
Dependent Claim
35 words
The invention as defined in claim 10 in which the movable portion includes a first surface exposed to the pressure at the exit and a second surface exposed to the pressure at the intake means.
Claim 15
Dependent Claim
52 words
The invention as defined in claim 10 in which the adjustable means includes spring means tending to exert a force to move the movable portion away from the stationary portion and in which there are means for setting the extent of the movement to set the maximum size of the intake means.
References Cited (Backward Citations)
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Cited
US2566525A
Cited
FR1235302A
Cited
US3047208A
Cited
US2990103A
Cited
US3443760A
Cited
US3728859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |