US3595523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic butterfly valve having a reinforcement blade
Assignee: Individual
•
Filing: 1969-04-14
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Granted: 1971-07-27
•
Expires: 1989-04-14
Abstract
Abstract A butterfly vale which includes a valve body of plastic material, having two separately positioned openings for connection in a pipeline; and a blade which is also constructed substantially from plastic material. The blade is journaled in the housing so as to be rotatable to a position wherein it prevents fluid flow between the openings in the housing. The blade is provided with reinforcement means.
Inventors
- 👤 George A Felton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:39
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
123 words
A butterfly valve including: a. A valve body mostly of a plastic material, having two separately positioned openings therein for connection to a pipeline; b. an asymmetric blade hAving two surfaces, said blade being constructed mainly of plastic materials and journaled in said housing between said openings to be rotatable to a closed position preventing fluid flow between said openings, and having its axis of rotation nearer one surface of said two surfaces of the blade than the other; c. an axial metal member disposed along the axis of rotation of the blade and secured thereto for rotation therewith; and d. at least two transverse reinforcement members within said blade extending transversely of said axial member toward the lateral edges of the blade.
Claim 2
Dependent Claim
123 words
A butterfly valve including: a. A valve body mostly of a plastic material, having two separately positioned openings therein for connection to a pipeline; b. an asymmetric blade hAving two surfaces, said blade being constructed mainly of plastic materials and journaled in said housing between said openings to be rotatable to a closed position preventing fluid flow between said openings, and having its axis of rotation nearer one surface of said two surfaces of the blade than the other; c. an axial metal member disposed along the axis of rotation of the blade and secured thereto for rotation therewith; and d. at least two transverse reinforcement members within said blade extending transversely of said axial member toward the lateral edges of the blade.
Claim 3
Dependent Claim
27 words
A valve according to claim 1 wherein said axial member is provided with apertures, said transverse reinforcement members being located in said apertures in said axial member.
Claim 4
Dependent Claim
23 words
A valve according to claim 2 wherein at least one of said transverse reinforcement members is provided with means for prestressing said blade.
Claim 5
Dependent Claim
23 words
A valve according to claim 3 wherein said means for prestressing said blade include terminal thread and nuts on respective transverse reinforcement members.
Claim 6
Dependent Claim
38 words
A valve according to claim 2 wherein said axial member rotates in trunnions positioned in the sides of said housing, the extremities of said axial member protruding from said blade into said trunnions to form cylindrical bearing arms.
Claim 7
Dependent Claim
24 words
A valve according to claim 5 wherein said trunnions are diametrically oppositely located in said housing, said housing being of substantially circular cross section.
Claim 8
Dependent Claim
46 words
A valve according to claim 5 wherein a first of said trunnions is a cylindrical well in the inside surface of said housing and the second of said trunnions is a cylindrical orifice in the side of said housing, said axial member protruding through said orifice.
Claim 9
Dependent Claim
45 words
A valve according to claim 7 wherein an outermost portion of said axial member in said second trunnion is of reduced diameter, and said second trunnion includes a thrust collar located about said portion of reduced diameter to restrict longitudinal movement of said axial member.
Claim 10
Dependent Claim
20 words
A valve according to claim 2 including annular sealing means operable between said housing and the perimeter of said blade.
Claim 11
Dependent Claim
23 words
A valve according to claim 9 wherein said sealing means is a flat annular ring located on the inner surface of said housing.
Claim 12
Dependent Claim
33 words
A valve according to claim 10 wherein said flat annular ring is located on an annular recessed ledge disposed toward one extremity of said housing and retained therein by an annular retaining ring.
Claim 13
Dependent Claim
30 words
A valve according to claim 9 wherein the coacting periphery of said blade and edge of said seal have an outward slant away from the upstream side of said valve.
Claim 14
Dependent Claim
32 words
A valve according to claim 12 wherein the inside surface of said valve in the vicinity of said sealing means has an outward slant away from the upstream side of said valve.
Claim 15
Dependent Claim
24 words
A valve according to claim 9 wherein the coacting edges of said sealing means and said blade are slightly rounded to diminish scuffing therebetween.
Claim 16
Dependent Claim
18 words
A valve according to claim 1 wherein said transverse reinforcement members comprise glass filaments located within said blade.
Claim 17
Dependent Claim
18 words
A valve according to claim 1 wherein said transverse reinforcement members comprise carbon filaments located within said blade.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |