US4767277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber-filled polymer impeller
Assignee: Flowserve Management Co
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Filing: 1981-04-17
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Granted: 1988-08-30
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Expires: 2001-04-17
Abstract
Abstract A molded fiber-filled polymer impeller having a polygon molded hole with machined grooves at the apexes of the polygon and a process for forming such grooves.
Inventors
- 👤 Fredric W. Buse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:59
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2205; F04D29/2222; F04D29/2227; F04D29/20; F05; F05D; F05D2230/00; F05D2230/10; F05D2260/00; F05D2260/95; F05D2300/00; F05D2300/40; F05D2300/43; F05D2300/60; F05D2300/603; F16; F16D; F16D1/00; F16D1/06; F16D1/08; F16D1/09; F16D1/092; F16D1/10; F16D2001/102
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
39 words
An impeller prepared by molding a fiber-filled polymer impeller with a polygon hole having at least three sides, for receiving a shaft and forming grooves at the apexes of the polygon hole after the fiber-filled polymer impeller has set.
Claim 2
Dependent Claim
39 words
An impeller prepared by molding a fiber-filled polymer impeller with a polygon hole having at least three sides, for receiving a shaft and forming grooves at the apexes of the polygon hole after the fiber-filled polymer impeller has set.
Claim 3
Dependent Claim
15 words
An impeller according to claim 1 wherein the sides of the polygon hole are curved.
Claim 4
Dependent Claim
14 words
An impeller according to claim 2 wherein the polygon hole is a three-sided hole.
Claim 5
Dependent Claim
13 words
An impeller according to claim 1 wherein the groove is formed by machining.
Claim 6
Dependent Claim
30 words
A molded fiber-filled polymer impeller having a polygon molded hole having at least three sides for receiving a shaft, said hole having machined grooves at the apexes of the polygon.
Claim 7
Dependent Claim
30 words
A molded fiber-filled polymer impeller having a polygon molded hole having at least three sides for receiving a shaft, said hole having machined grooves at the apexes of the polygon.
Claim 8
Dependent Claim
18 words
A molded fiber-filled polymer impeller according to claim 5 wherein the sides of the polygon hole are curved.
Claim 9
Dependent Claim
17 words
A molded fiber-filled polymer impeller according to claim 6 wherein the polygon hole is a three-sided hole.
Claim 10
Dependent Claim
14 words
A molded fiber-filled polymer impeller according to claim 6 wherein there are four vanes.
Claim 11
Dependent Claim
26 words
A molded fiber-filled polymer impeller according to claim 5 wherein the height of the machined groove is approximately 3/4ths of the width of the machined groove.
Claim 12
Dependent Claim
18 words
A molded fiber-filled polymer impeller according to claim 5 wherein the machined groove is approximately 3 mm wide.
Claim 13
Dependent Claim
19 words
A molded fiber-filled polymer impeller according to claim 5 wherein the machined groove is approximately 2.2 mm in height.
Claim 14
Dependent Claim
16 words
A molded fiber-filled polymer impeller according to claim 5 wherein the polygon molded hole is tapered.
References Cited (Backward Citations)
DE1528765A1
Cited
US3434369A
Cited
US3477794A
Cited
US3510229A
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US3604819A
Cited
US3779668A
Cited
US3994177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |