US4737076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for maintaining concentricity of rotating components
Assignee: RTX Corp
•
Filing: 1986-10-20
•
Granted: 1988-04-12
•
Expires: 2006-10-20
Abstract
Abstract A cylindrically shaped spacer between a shaft and hub of a turbine rotor of a gas turbine engine as fabricated from a flexible resilient material and interference fitted at discrete points on either side of the transverse axis of the spacer between the shaft and spacer and between the hub and spacer to impart a twist of the spacer about this axis to remain in contact with the hub and shaft throughout its entire rotating envelope.
Inventors
- 👤 George A. Bonner
- 👤 Lee E. Hansen
- 👤 Jack W. Wilson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:41
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/025; F01D5/026; Y; Y10; Y10T; Y10T403/00; Y10T403/48; Y10T403/70; Y10T403/7047; Y10T403/7061
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A spacer for a shaft and a rotating component rotatably connected to each other for unitary rotation, said spacer being generally cylindrically shaped and hollow to surround said shaft and being disposed between said shaft and said rotating component and having a transverse axis, said spacer consisting of a first interference fit and a second interference fit, said first interference fit solely at a location on the spacer at one side of said transverse axis, said second interference fit solely at a location on the spacer at the opposing side of said transverse axis, said first interference fit between said spacer and said shaft, said second interference fit between said spacer and said rotating component for imparting a twisting load about said transverse axis, whereby said spacer tends to untwist upon an increase in rotational speed so as to maintain contact between said shaft and rotating component wherein said spacer has a thickened cross section at the first interference fit extending radially inward toward said shaft and a thickened cross section at the second interference fit extending radially outward toward said rotating component.
Claim 2
Dependent Claim
183 words
A spacer for a shaft and a rotating component rotatably connected to each other for unitary rotation, said spacer being generally cylindrically shaped and hollow to surround said shaft and being disposed between said shaft and said rotating component and having a transverse axis, said spacer consisting of a first interference fit and a second interference fit, said first interference fit solely at a location on the spacer at one side of said transverse axis, said second interference fit solely at a location on the spacer at the opposing side of said transverse axis, said first interference fit between said spacer and said shaft, said second interference fit between said spacer and said rotating component for imparting a twisting load about said transverse axis, whereby said spacer tends to untwist upon an increase in rotational speed so as to maintain contact between said shaft and rotating component wherein said spacer has a thickened cross section at the first interference fit extending radially inward toward said shaft and a thickened cross section at the second interference fit extending radially outward toward said rotating component.
References Cited (Backward Citations)
DE423465C
Cited
US1593393A
Cited
US1873956A
Cited
US2579745A
Cited
US2619317A
Cited
US2869820A
Cited
US3146635A
Cited
US3165342A
Cited
US3671140A
Cited
US3689177A
Cited
US3846044A
Cited
US3888602A
Cited
US4242008A
Cited
US4183719A
Cited
US4247256A
Cited
US4139160A
Cited
US4468148A
Cited
JPS6067703A
Cited
US4573875A
Cited
US4653984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |