Patent US3730439A successfully refreshed from Google Patents.
US3730439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single nozzle fluid device
Assignee: Individual
•
Filing: 1971-09-20
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Granted: 1973-05-01
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Expires: 1991-09-20
Abstract
Abstract This invention relates to a fluid flow device for a spout or a spout-end which is designed to produce a single laminar flow stream that is substantially splash-less at normal fluid flow rates. The device embodies a plurality of screens which are intimately in contact with each other and arranged to be spherical or concaval in shape, together with a strainer which is positioned up-stream of the screens. The housing for the screens and the strainer is so shaped that the fluid passing the screens is pointed-toward the center or axis of the device.
Inventors
- 👤 R Parkison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:35
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/02; E03C1/08; E03C1/086; E03C1/084
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
172 words
A substantially laminar non-aerated fluid flow device for use with spouts, comprising a body consisting of an unapertured shell having a downstream discharge outlet through which non-aerated fluid is discharged and having an internal peripheral chamfer or ledge, a plurality of screens which are somewhat larger than the largest dimension of the internal chamfer or ledge, the screens being pressed into the body of the device so as to be in contact with each other and seated on the internal chamfer or ledge and to assume a spherical or concaval configuration above the discharge outlet of the body so that all of the screens are pointed downstream, the axis of said screens substantially coinciding with the axis of the device, the internal wall of the body downstream of the chamfer or ledge being stepped so as to reduce the diameter of the body of the device and thereby point the stream flowing through the screens in the direction of the axis of the device before exiting through the discharge outlet without aeration.
Claim 2
Dependent Claim
172 words
A substantially laminar non-aerated fluid flow device for use with spouts, comprising a body consisting of an unapertured shell having a downstream discharge outlet through which non-aerated fluid is discharged and having an internal peripheral chamfer or ledge, a plurality of screens which are somewhat larger than the largest dimension of the internal chamfer or ledge, the screens being pressed into the body of the device so as to be in contact with each other and seated on the internal chamfer or ledge and to assume a spherical or concaval configuration above the discharge outlet of the body so that all of the screens are pointed downstream, the axis of said screens substantially coinciding with the axis of the device, the internal wall of the body downstream of the chamfer or ledge being stepped so as to reduce the diameter of the body of the device and thereby point the stream flowing through the screens in the direction of the axis of the device before exiting through the discharge outlet without aeration.
Claim 3
Dependent Claim
29 words
A non-aerated fluid flow device according to claim 1 including, in addition, a strainer positioned across the inner wall of the body of the device upstream of the screens.
Claim 4
Dependent Claim
49 words
A non-aerated fluid flow device according to claim 1 in which the screens are flat before they are inserted into the body of the device and in close contact with each other but oriented so that their cross-meshes are at different angular relative positions with respect to each other.
Claim 5
Dependent Claim
43 words
A non-aerated fluid flow device according to claim 2 in which all of the screens have the same mesh and are substantially in complete contact with each other but are oriented so that their cross-meshes are at different positions relative to each other.
Claim 6
Dependent Claim
32 words
A non-aerated fluid flow device according to claim 4 which has the body externally threaded so that it may be attached to a spout for controlling the pattern of the emitted stream.
Claim 7
Dependent Claim
58 words
A non-aerated fLow device according to claim 5 in which the internal wall of the body of the device downstream of the chamfer or ledge includes two peripheral walls both of which are substantially parallel to the axis of the device and an intermediate wall therebetween forming an angle which is in the range of 15* to 45*.
Claim 8
Dependent Claim
30 words
A non-aerated flow device according to claim 6 in which the angular wall between the two walls which parallel the axis of the device has an angle of approximately 30*.
Claim 9
Dependent Claim
29 words
A non-aerated flow device according to claim 7 in which the screens and the strainer are made of metal and the body of the device is made of plastic.
Claim 10
Dependent Claim
46 words
A non-aerated fluid flow device according to claim 6, the device being circular in cross-section and having its discharge outlet of an area which is between 60 to 90 per cent of the cross-sectional area at the largest internal dimension of the body of the device.
Claim 11
Dependent Claim
38 words
A non-aerated fluid flow device according to claim 9 in which the length of the device downstream of the chamfer or ledge is at least one-sixteenth of an inch in length but not more than about one-half inch.
Claim 12
Dependent Claim
25 words
A non-aerated fluid flow device according to claim 10 in which the screens are substantially contiguous to each other throughout their spherical or concaval curvatures.
Claim 13
Dependent Claim
40 words
A non-aerated fluid flow device according to claim 11, in which the meshes of the screens are of a common predetermined size so that the average velocity of fluid flow through the discharge outlet cannot exceed four feet per second.
Claim 14
Dependent Claim
99 words
A substantially laminar non-aerated faucet attachment comprising a body consisting of an unapertured shell having a downstream discharge outlet through which non-aerated fluid is discharged and having an internal ledge upstream of the faucet exit, a plurality of screens all of which are stacked on said ledge and closely adjacent to each other and curved so as to be pointed axially downstream toward the discharge outlet when so stacked, and a strainer positioned upstream of said screens, the fluid flowing through the screens being deflected toward the axis of the body before exiting through the discharge outlet without aeration.
Claim 15
Dependent Claim
99 words
A substantially laminar non-aerated faucet attachment comprising a body consisting of an unapertured shell having a downstream discharge outlet through which non-aerated fluid is discharged and having an internal ledge upstream of the faucet exit, a plurality of screens all of which are stacked on said ledge and closely adjacent to each other and curved so as to be pointed axially downstream toward the discharge outlet when so stacked, and a strainer positioned upstream of said screens, the fluid flowing through the screens being deflected toward the axis of the body before exiting through the discharge outlet without aeration.
Claim 16
Dependent Claim
37 words
A substantially laminar non-aerated faucet attachment according to claim 13, in which the internal wall of the body is tapered downstream of the screens so that fluid flow therethrough will be additionally pointed in the downstream direction.
Claim 17
Dependent Claim
35 words
A substantially laminar non-aerated faucet attachment according to claim 14, in which the cross meshes of the screens are randomly oriented at different positions with respect to each other while remaining stacked on the ledge.
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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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |