US3904301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hub locking arrangement
Assignee: Allis Chalmers Pump Inc
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Filing: 1974-07-24
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Granted: 1975-09-09
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Expires: 1994-07-24
Abstract
Abstract An arrangement for locking an internally threaded pump impeller hub to the end of a threaded shaft which includes a second thread on the shaft of a different hand than the internal thread of the impeller hub. A lock nut or other threaded means engages the second thread and also the impeller hub. The first thread is of a hand whereby the impeller hub is normally urged in a tightening direction due to the normal load on the impeller and the second thread is of a hand such that the threaded means engaging the hub is normally urged in a tightening direction upon a reversal of the load on the impeller.
Inventors
- 👤 Earle E Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:57
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; F04; F04D; F04D29/00; F04D29/18; F04D29/20; F16B; F16B2200/00; F16B2200/40; F16B2200/403; F16B2200/69; F16B2200/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
The combination of a hub releasably attached to a rotatable shaft comprising: walls defining a stepped opening through said hub of two different diameters with an annular shoulder defined by the junction between said different diameters; an internal thread formed on the larger diameter portion of said opening; a thread on the end portion of said shaft of the same pitch and hand as said internal thread, said hub being threaded onto said shaft; locking means having an annular flange contacting said shoulder and including a threaded portion extending through said hub opening of smaller diameter and terminating on the exterior of said hub remote from said shaft, said threaded portion of said locking means having a different hand thread than said shaft thread; means releasably connecting said locking means to said shaft to prohibit relative rotational movement therebetween; and a nut threaded onto the threaded portion of said locking means on the exterior of said hub and engaging the suRface of said hub.
Claim 2
Dependent Claim
164 words
The combination of a hub releasably attached to a rotatable shaft comprising: walls defining a stepped opening through said hub of two different diameters with an annular shoulder defined by the junction between said different diameters; an internal thread formed on the larger diameter portion of said opening; a thread on the end portion of said shaft of the same pitch and hand as said internal thread, said hub being threaded onto said shaft; locking means having an annular flange contacting said shoulder and including a threaded portion extending through said hub opening of smaller diameter and terminating on the exterior of said hub remote from said shaft, said threaded portion of said locking means having a different hand thread than said shaft thread; means releasably connecting said locking means to said shaft to prohibit relative rotational movement therebetween; and a nut threaded onto the threaded portion of said locking means on the exterior of said hub and engaging the suRface of said hub.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |