Patent US3572970A successfully refreshed from Google Patents.
US3572970A
Expired / Lapsed
US
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Turbomachinery blade spacer
Assignee: General Electric Co
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Filing: 1969-01-23
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Granted: 1971-03-30
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Expires: 1989-01-23
Abstract
Abstract A blade spacer having a shank portion formed of a resilient, low-set, nonmetallic material and adapted for insertion beneath a turbomachinery blade so as to maintain the blade in tight radial abutment with its disc slot.
Inventors
- 👤 Robert J Smuland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:43
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/32; F01D5/323; F01D5/12; F01D5/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
169 words
For use in turbomachinery of the type including a rotatable disc formed with at least one slot at its periphery, a blade having a root portion engaged in said slot and extending generally radially from said disc, said slot and said root portion sized and formed to abut and radially lock the blade to the disc, with the base surface of the root portion spaced from the base surface of the slot to form a passage therebetween, means for maintaining said blade in said radial locking abutment with said disc comprising, an elongated shank having a crosssectional shape generally conforming to the cross-sectional shape of said passage, the radial thickness of said shank being of predetermined increased dimension with respect to the radial height of said passage, said shank being formed of a resilient, nonmetallic, low-set material whereby said shank may be elongated for insertion into and removal from said passage and is compressed after insertion to yieldingly urge said blade outwardly into said locking abutment with said disc.
Claim 2
Dependent Claim
169 words
For use in turbomachinery of the type including a rotatable disc formed with at least one slot at its periphery, a blade having a root portion engaged in said slot and extending generally radially from said disc, said slot and said root portion sized and formed to abut and radially lock the blade to the disc, with the base surface of the root portion spaced from the base surface of the slot to form a passage therebetween, means for maintaining said blade in said radial locking abutment with said disc comprising, an elongated shank having a crosssectional shape generally conforming to the cross-sectional shape of said passage, the radial thickness of said shank being of predetermined increased dimension with respect to the radial height of said passage, said shank being formed of a resilient, nonmetallic, low-set material whereby said shank may be elongated for insertion into and removal from said passage and is compressed after insertion to yieldingly urge said blade outwardly into said locking abutment with said disc.
Claim 3
Dependent Claim
59 words
The structure of claim 1 further characterized in that said shank is formed with an axially extending well opening at one end of said shank, said well terminating at a position closely spaced to the other end of said shank, whereby said elongation may be effected by applying an axially directed force to the terminal end of said well.
Claim 4
Dependent Claim
25 words
The structure of claim 1 further characterized in that one end of said shank is tapered to facilitate insertion of said shank in said passage.
Claim 5
Dependent Claim
20 words
The structure of claim 1 further characterized by and including stop means for axially positioning said shank within said passage.
Claim 6
Dependent Claim
32 words
The structure of claim 4 further characterized in that said stop means comprises a lip adapted for abutment with said disc and integrally formed with and at one end of said shank.
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |