US3817285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid dispensing nozzle
Assignee: Dover Corp
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Filing: 1972-04-17
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Granted: 1974-06-18
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Expires: 1992-04-17
Abstract
Abstract A fluid dispensing nozzle has a first venturi created between a seat ring and a movable, resiliently biased poppet valve. The resistance of the movable poppet valve is decreased as the flow rate increases by a second venturi effect, which reduces the pressure in a chamber formed within the movable poppet valve.
Inventors
- 👤 P Wilder
- 👤 C Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:10
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/42; B67D7/44; B67D7/46; B67D7/48; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87917; Y10T137/88046
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
165 words
In a fluid dispensing nozzle comprising a body having an inlet and an outlet, a first valve seat, a first valvE cooperating with said first valve seat to stop flow from said inlet to said outlet when said first valve engages said first valve seat, actuating means cooperating with said first valve to move said first valve away from said first valve seat, a second valve seat disposed between said first valve seat and said outlet, a second valve slidably carried on said actuating means and movable independently thereof, said second valve cooperating with said second valve seat to produce a venturi effect when said first valve is moved away from said first valve seat by said actuating means, means acting on said second valve to urge said second valve in a direction opposite fluid flow and toward said second valve seat, and means to reduce the effectiveness of said urging means when fluid flow moves said second valve away from said second valve seat.
Claim 2
Dependent Claim
165 words
In a fluid dispensing nozzle comprising a body having an inlet and an outlet, a first valve seat, a first valvE cooperating with said first valve seat to stop flow from said inlet to said outlet when said first valve engages said first valve seat, actuating means cooperating with said first valve to move said first valve away from said first valve seat, a second valve seat disposed between said first valve seat and said outlet, a second valve slidably carried on said actuating means and movable independently thereof, said second valve cooperating with said second valve seat to produce a venturi effect when said first valve is moved away from said first valve seat by said actuating means, means acting on said second valve to urge said second valve in a direction opposite fluid flow and toward said second valve seat, and means to reduce the effectiveness of said urging means when fluid flow moves said second valve away from said second valve seat.
Claim 3
Dependent Claim
74 words
The nozzle according to claim 1 including means to slidably support said second valve, said slidably supporting means cooperating with said second valve to form a chamber therebetween downstream of said first and second valve seats, said reducing means including passage means in said second valve to provide communication between said chamber and the flow through said body whereby a low pressure region is produced in said chamber when fluid flows through said body.
Claim 4
Dependent Claim
18 words
The nozzle according to claim 2 in which said urging means comprises resilient means disposed within said chamber.
Claim 5
Dependent Claim
46 words
The nozzle according to claim 3 including means continuously urging said first valve into engagement with said first valve seat to stop flow from said inlet to said outlet, said continuously urging means acting in the direction of fluid flow from said inlet to said outlet.
Claim 6
Dependent Claim
33 words
The nozzle according to claim 4 in which said urging means acts on said second valve in the opposite direction to that in which said continuously urging means acts on said first valve.
Claim 7
Dependent Claim
34 words
The nozzle according to claim 3 in which said actuating means comprises a stem extending through said slidably supporting means, said chamber, and said second valve; and said stem cooperates with said first valve.
Claim 8
Dependent Claim
21 words
The nozzle according to claim 3 including a single member having both said first valve seat and said second valve seat.
Claim 9
Dependent Claim
39 words
The nozzle according to claim 1 in which said reducing means comprises means to produce a low pressure acting on said second valve when said first valve is moved away from said first valve seat and fluid flow occurs.
Claim 10
Dependent Claim
46 words
The nozzle according to claim 1 including means continuously urging said first valve into engagement with said first valve seat to stop flow from said inlet to said outlet, said continuously urging means acting in the direction of fluid flow from said inlet to said outlet.
Claim 11
Dependent Claim
14 words
The nozzle according to claim 1 in which said urging means comprises resilient means.
Claim 12
Dependent Claim
21 words
The nozzle according to claim 1 including a single member having both said first valve seat and said second valve seat.
Claim 13
Dependent Claim
106 words
The nozzle according to claim 1 in which said first valve includes a skirt, a sealing disc, and a retainer for said disc; a member having first and second walls, said member has said first valve seat formed therein between said first and second walls, said first wall of said member is straight and said second wall of said member is inclined, and said skirt has its peripheral wall inclined to cooperate with said first straight wall of said member and said retainer has its outer peripheral wall straight to cooperate with said second inclined wall of said member whereby the rate of flow is controlled.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |