US3876327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-metallic pump
Assignee: Goulds Pumps Inc
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Filing: 1973-02-26
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Granted: 1975-04-08
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Expires: 1993-02-26
Abstract
Abstract A non-metallic pump is made of synthetic organic polymeric elements, including casing, impeller, plates for the casing, cover and suction and discharge nozzles. The desired combination of strength and resistance to corrosion and wear from contacts with liquids to be pumped is obtained, utilizing unreinforced polymer in thin sections at surfaces which can contact the liquid being pumped, compressed molded filament-reinforced polymer or roving-wound sections to be threaded for screw attachment to other parts, and by having casing halves, and preferably also, covers for the casings, peripherally covered with filamentreinforced polymer, as by winding of liquid resin coated glass rovings on a bias about the casing periphery, followed by gelling and curing. Various parts of the pump are made by compression molding and hand or spray layup techniques and the preferred plastics employed are thermosets, such as polyester and epoxy resins. Also within the invention are processes for sealing the casing plates to the casing and for winding filament- or rovingreinforced thermosettable polymer about the casing periphery.
Inventors
- 👤 Valenteen S Lobanoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:13
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/02; F04D29/026; F04D29/40; F04D29/42; F04D29/426; F05; F05D; F05D2300/00; F05D2300/40; F05D2300/43; F05D2300/60; F05D2300/603
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
133 words
A non-metallic pump comprising a casing, front and back plates for the casing and a rotary impeller, the casing being of two halves, with an initial plane of separation thereof parallel to the plane of rotation of the pump impeller, the casing and the front and back plates for it being of glass filament-containing synthetic organic polymer, and means for holding the front and back plates to the casing and for holding the casing halves together, which means is glass filament-containing polymer bias wound about the casing and plate peripheries, which means strengthens the pump against outward pressures, with the interiors of the casing walls, where they are in contact with the liquid to be pumped, being of synthetic organic polymer free of filamentary reinforcement to a depth of at least 0.5 mm.
Claim 2
Dependent Claim
133 words
A non-metallic pump comprising a casing, front and back plates for the casing and a rotary impeller, the casing being of two halves, with an initial plane of separation thereof parallel to the plane of rotation of the pump impeller, the casing and the front and back plates for it being of glass filament-containing synthetic organic polymer, and means for holding the front and back plates to the casing and for holding the casing halves together, which means is glass filament-containing polymer bias wound about the casing and plate peripheries, which means strengthens the pump against outward pressures, with the interiors of the casing walls, where they are in contact with the liquid to be pumped, being of synthetic organic polymer free of filamentary reinforcement to a depth of at least 0.5 mm.
Claim 3
Dependent Claim
69 words
A pump according to claim 1 wherein the interiors of the casing walls which are in cotact with liquid to be pumped and which are of synethic organic polymer free of filamentary reinforcement are backed by polymer which is reinforced by veils, mats or cloths of glass filaments and, farther away from the liquid-contacting interior surfaces of the casing, by such polymer reinforced with glass filaments randomly distributed therein.
Claim 4
Dependent Claim
16 words
A pump according to claim 2 wherein the plates are of glass filament-reinforced compression molded polymer.
Claim 5
Dependent Claim
115 words
A pump according to claim 3 which comprises suction and discharge nozzles of glass filament-reinforced polymer having tapered shank portions and cement means for holding said nozzles to the front plate and casing, respectively, and in which the front plate has an opening therein substantially axially located, a wall of which is tapered to fit the taper of the shank of the suction nozzle, the casing has a discharge opening on the periphery thereof with a wall thereof tapered to fit the taper of the shank of the discharge nozzle and the suction and discharge nozzles and the front cover and the casing periphery, respectively, have contacting surfaces which are held together by cementing means.
Claim 6
Dependent Claim
29 words
A pump according to claim 1 wherein all the non-metallic pump parts are of the same thermosetting synthetic organic polymer and all such parts are filament-reinforced with fiber glass.
Claim 7
Dependent Claim
22 words
A pump according to claim 1 wherein the synthetic organic polymer is selected from the group consisting of polyester and epoxy resins.
Claim 8
Dependent Claim
15 words
A pump according to claim 6 wherein the synthetic organic polymer is a bisphenol polyester.
Claim 9
Dependent Claim
33 words
A pump casing according to claim 1 wherein said bias wound glass filaments are in continuous rovings of about 10 to 60 filaments each, with diameters in the 0.05 to 0.2 mm. range.
Claim 10
Dependent Claim
167 words
A non-metallic pump comprising a casing of two halves, front and back plates for the casing, suction and discharge nozzles, a rotary impeller, all such parts being of glass filament-containing synthetic organic polymer, means for holding the suction nozzle to the front plate, means for holding the discharge nozzle to the casing and means for holding the casing halves, which have an initial plane of separation parallel to the plane of rotation of the pump impeller, together and holding the front and back plates to the casing so as to strengthen the casing and improve the resistance of the pump to internal pressures, said means for holding the casing halves together and holding the front and back plates to the casing being glass filament-containing polymer wound about the casing and plate peripheries, with the interiors of the casing walls, where they are in contact with the liquid to be pumped, being of synthetic organic polymer free of filamentary reinforcement to a depth of at least 0.5 mm.
Claim 11
Dependent Claim
167 words
A non-metallic pump comprising a casing of two halves, front and back plates for the casing, suction and discharge nozzles, a rotary impeller, all such parts being of glass filament-containing synthetic organic polymer, means for holding the suction nozzle to the front plate, means for holding the discharge nozzle to the casing and means for holding the casing halves, which have an initial plane of separation parallel to the plane of rotation of the pump impeller, together and holding the front and back plates to the casing so as to strengthen the casing and improve the resistance of the pump to internal pressures, said means for holding the casing halves together and holding the front and back plates to the casing being glass filament-containing polymer wound about the casing and plate peripheries, with the interiors of the casing walls, where they are in contact with the liquid to be pumped, being of synthetic organic polymer free of filamentary reinforcement to a depth of at least 0.5 mm.
Claim 12
Dependent Claim
63 words
A pump according to claim 9 wherein the halves of the casing and the front and back plates for the casing are held together by glass filament-reinforced plastic in which the glass filaments are bias wound about the peripheries of the front plate, casing halves and back plate to hold them together in a unitary pump body of improved resistance against internal pressures.
References Cited (Backward Citations)
US2115997A
Cited
US2525469A
Cited
US2764099A
Cited
US2744043A
Cited
US3228187A
Cited
US3424434A
Cited
US3656861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |