Patent US3811716A successfully refreshed from Google Patents.
US3811716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for locking a hub of rotodynamic pump rotor on pump shaft
Assignee: Individual
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Filing: 1972-12-27
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Granted: 1974-05-21
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Expires: 1992-12-27
Abstract
Abstract A disconnectable locking system or arrangement between a rotor hub and pump shaft of a roto-dynamic pump when a shaft portion is inserted into a bore of the hub, including a locking sleeve on the shaft adapted to be moved by the action of a threaded nut so as to have one end thereof extend into the hub bore until a thrust shoulder on the sleeve engages the hub, the end of the sleeve being chamfered and adapted to contact a first split ring positioned in a recess in the hub bore so as to in turn contact a second split ring fastened to the shaft and forming a thrust surface with said first split ring.
Inventors
- 👤 S Morzynski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:29
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/20; Y; Y10; Y10T; Y10T403/00; Y10T403/57; Y10T403/5793
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
241 words
A locking arrangement comprising a rotor shaft, a pump rotor hub having a bore formed therein, said rotor hub being connected to said rotor shaft, said shaft having a portion thereof inserted in said bore of said hub; said locking arrangement comprising a peripheral groove being formed in said shaft portion, first split ring means positioned in said groove, said split ring means having an outer diameter larger than the diameter of said shaft portion; said hub having a inwardly facing internal annular recess formed therein, said first split ring means extending into said recess when said shaft portion is inserted into said hub; second split ring means positioned in said annular recess; a lock sleeve incompassing an axial segment of said shaft and having one of its ends thereof extending into said hub bore; annular shoulder means formed on the external peripheral surface of said lock sleeve contacting an end surface of said hub; nut means threadingly engaging said shaft and bearing against the other end of said locking sleeve biasing the latter into engagement with said hub, said first mentioned sleeve end having an external annular chamfer engaging said second split ring means and expanding the latter radially outwardly and into contact with said first split ring means; and resilient spring means encompassing the outer peripheral surface of respectively said first and second split ring means and radially biasing each of said split ring means into normally closed positions.
Claim 2
Dependent Claim
241 words
A locking arrangement comprising a rotor shaft, a pump rotor hub having a bore formed therein, said rotor hub being connected to said rotor shaft, said shaft having a portion thereof inserted in said bore of said hub; said locking arrangement comprising a peripheral groove being formed in said shaft portion, first split ring means positioned in said groove, said split ring means having an outer diameter larger than the diameter of said shaft portion; said hub having a inwardly facing internal annular recess formed therein, said first split ring means extending into said recess when said shaft portion is inserted into said hub; second split ring means positioned in said annular recess; a lock sleeve incompassing an axial segment of said shaft and having one of its ends thereof extending into said hub bore; annular shoulder means formed on the external peripheral surface of said lock sleeve contacting an end surface of said hub; nut means threadingly engaging said shaft and bearing against the other end of said locking sleeve biasing the latter into engagement with said hub, said first mentioned sleeve end having an external annular chamfer engaging said second split ring means and expanding the latter radially outwardly and into contact with said first split ring means; and resilient spring means encompassing the outer peripheral surface of respectively said first and second split ring means and radially biasing each of said split ring means into normally closed positions.
Claim 3
Dependent Claim
134 words
A locking arrangement as claimed in claim 1, said annular recess in said rotor hub forming a first and second recess portion of a step-like configuration, said second recess portion being of a diameter larger than said first recess portion, said step-like configuration defining a first recess and second recess of enlarged diameter relative to said first recess, said first split ring means being located in a first one of said portions upon insertion of said shaft portion into the bore of said hub, and said second split ring means being located in a second one of said recess portions having the enlarged diameter and having at least a portion of the end surface of said second split ring means thereof in contact with an adjacent end surface of said first split ring means.
Claim 4
Dependent Claim
28 words
A locking arrangement as claimed in claim 1, said second split ring means having an essentially frusto-conical surface being cooperatively engaged by the chamfer on said lock sleeve.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |