US3838708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In-line check valve
Assignee: Individual
•
Filing: 1973-08-14
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Granted: 1974-10-01
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Expires: 1993-08-14
Abstract
Abstract The check valve can be placed within a pipe and includes, essentially, a conical structure with openings therein, and a deformable, elastic member within the conical structure; flow from the tip of the cone towards the base is permitted, fluid passing through the apertures of the conical structure and deforming the elastic insert; flow in the other direction presses the conical structure against the openings. In accordance with the invention, the conical structure is formed of spirally wound wire, preferably round wire, held in position by longitudinal spacers at the surface of the cone, so that the aperture will be a spiral slit, the deformable insert pressing against the round wires when in check position, thus preventing damage to the deformable insert.
Inventors
- 👤 A Schule
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:37
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/40; F16K15/00; F16K15/14; F16K15/148; Y; Y10; Y10S; Y10S251/00; Y10S251/902; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7859; Y10T137/7879; Y10T137/7888; Y10T137/789
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
In-line check valve for placement within a pipe comprising a conical structure formed of a spirally wound wire (1), at least a portion of the turns of the spirally wound wire being spaced from each other to form a spiral slit between the interior and exterior of the cone; spacer means (7) securing the spiral turns of the wire in relation to each other and in conical position; and a deformable elastic insert (6) having outer conical walls fitting within the conical structure, the deformable insert seating against the spirally wound wire structure when reverse flow is encountered, and lifting off the spiral wire structure upon forward flow.
Claim 2
Dependent Claim
108 words
In-line check valve for placement within a pipe comprising a conical structure formed of a spirally wound wire (1), at least a portion of the turns of the spirally wound wire being spaced from each other to form a spiral slit between the interior and exterior of the cone; spacer means (7) securing the spiral turns of the wire in relation to each other and in conical position; and a deformable elastic insert (6) having outer conical walls fitting within the conical structure, the deformable insert seating against the spirally wound wire structure when reverse flow is encountered, and lifting off the spiral wire structure upon forward flow.
Claim 3
Dependent Claim
11 words
Valve according to claim 1 wherein the wire has circular diameter.
Claim 4
Dependent Claim
28 words
Valve according to claim 1 wherein the terminal windings of the wire are adjacent each other and the windings intermediate said terminal windings are spaced from each other.
Claim 5
Dependent Claim
31 words
Valve according to claim 1 wherein the spacer means comprises at least one rod-like element (7) located at a generatrix of the cone, the wire being secured to the rod-like element.
Claim 6
Dependent Claim
23 words
Valve according to claim 4 wherein the rod-like elements and the wire are welded to each other at each turn of the wire.
Claim 7
Dependent Claim
19 words
Valve according to claim 4 wherein a plurality of rod-like spacer elements are provided, spaced uniformly about the circumference
Claim 8
Dependent Claim
59 words
Valve according to claim 1 wherein the wire is wound at the tip of the cone to leave an inner diameter large enough to thread a screw therethrough, the screw thread engaging at least one turn of the spiral formed by the wire; said screw being secured to the deformable elastic insert (6) to hold the insert in position.
Claim 9
Dependent Claim
52 words
Valve according to claim 1 wherein the deformable insert is formed with an end portion and a projecting head at the end thereof; the wire is wound at the tip of the cone to leave an inner diameter large enough to pass the end portion through the end turns of the spiral.
Claim 10
Dependent Claim
12 words
Valve according to claim 1 wherein the insert is an elastomer material.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |