Patent US4490175A successfully refreshed from Google Patents.
US4490175A
Expired / Lapsed
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Vane for rotary fluid compressors
Assignee: Nippon Piston Ring Co Ltd
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Filing: 1983-11-01
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Granted: 1984-12-25
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Expires: 2003-11-01
Abstract
Abstract An improved vane for a rotary fluid compressor for which the rate of abrasive wear is matched to that of the mating rotor. The vane is made from a steel material consisting of 0.7-1.3 wt % of C, 13-20 wt % of Cr, and at least one of 0.3-1.5 wt % of Mo and 0.07-0.15 wt % of V, the balance being iron. Alternatively, the material may further contain not more than 1.0 wt % of Si and not more than 1.0 wt % of Mn. A vane so formed is ideal, in abrasion characteristics, for use with a Mo-Ni-Cr cast iron rotor.
Inventors
- 👤 Michiyoshi Matsuzaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:34
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/22; C22C38/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
67 words
A vane for a rotary fluid compressor, said vane being insertable slidingly in a vane groove of said compressor, characterized in that said vane is made from a steel material consisting essentially of 0.7-1.3 wt % of C, 13-20 wt % of Cr, and at least one of 0.3-1.5 wt % of Mo and 0.07-0.15 wt % of V, the balance being Fe and unavoidable impurity compositions.
Claim 2
Dependent Claim
67 words
A vane for a rotary fluid compressor, said vane being insertable slidingly in a vane groove of said compressor, characterized in that said vane is made from a steel material consisting essentially of 0.7-1.3 wt % of C, 13-20 wt % of Cr, and at least one of 0.3-1.5 wt % of Mo and 0.07-0.15 wt % of V, the balance being Fe and unavoidable impurity compositions.
Claim 3
Dependent Claim
38 words
The vane for a rotary fluid compressor as claimed in claim 1, characterized in that said steel material further consists of not more than 1.0 wt % of Si and not more than 1.0 wt % of Mn.
References Cited (Backward Citations)
US4141760A
Cited
US4302256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |