US3734697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump impeller making
Assignee: ROY E ROTH CO US
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Filing: 1970-07-13
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Granted: 1973-05-22
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Expires: 1990-07-13
Abstract
Abstract The process of making an impeller for use in a pump by affixing a disc having blades formed about its outer periphery onto the reduced diameter portion of a hub. A plurality of longitudinal grooves is formed lengthwise into the reduced diameter hub portion and then pressed into a circular bore formed in the center of the impeller disc. The assembly is then placed in a press to swage the outer annular edge of the reduced diameter hub portion into a chafer provided around the circular bore of the disc to thereby solidly hold the disk against the shoulder on the hub.
Inventors
- 👤 L Sieghartner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:08
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; F16D1/064; F16D1/072; B; B21; B21K; B21K25/00; B23; B23P; B23P11/00; F04; F04D; F04D23/00; F04D23/008; F04D29/00; F04D29/18; F04D29/188; F04D29/20; F04D5/00; F04D5/002; F16H; F16H55/00; F16H55/02; F16H55/17; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4932; Y10T29/49325; Y10T29/49826; Y10T29/49833; Y10T29/49835; Y10T29/49908; Y10T29/49915; Y10T29/49945; Y10T403/00; Y10T403/70; Y10T403/7026; Y10T403/7033
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |