US3829252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing arrangement for an air compressor
Assignee: Kawasaki Heavy Industries Ltd
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Filing: 1972-03-20
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Granted: 1974-08-13
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Expires: 1992-03-20
Abstract
Abstract Vanes of an air compressor rotor are provided with end seals and an axially extending peripheral seal. A cylindrical sealing member is positioned at the radially innermost end of each end seal to engage therewith. The cylindrical sealing member and the end seals are urged outwardly by springs. The end seals extend radially outwardly to the outer periphery of the peripheral seal to seal the outer ends of the peripheral seal which normally has a tolerance to allow for thermal expansion.
Inventors
- 👤 M Nakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:51
CPC Classifications
F; F04; F04C; F04C21/00; F04C21/002; F04C27/00; F04C27/007
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
A sealing arrangement for an air compressor of the oscillating-vane type having a vaned rotor provided with end seals and a peripheral seal on each vane, the rotor being on an axial shaft concentric with an outer housing, the improvements in the sealing arrangement: a sealing member accommodated by a hole in each end of the vane adjacent the axial shaft of the rotor, the hole preventing the sealing member from moving in any direction except axially and the hole contacting the periphery of the rotor shaft; and a spring means in the hole for urging the sealing member axially outward, the radially inner end of the end seal contacting the sealing member in air tight engagement in either circumferential direction and the end seals being movable relative to the sealing member in a radial direction to accommodate wear of the peripheral seal without allowing leakage between the radially innermost ends of the end seal and the rotor shaft.
Claim 2
Dependent Claim
159 words
A sealing arrangement for an air compressor of the oscillating-vane type having a vaned rotor provided with end seals and a peripheral seal on each vane, the rotor being on an axial shaft concentric with an outer housing, the improvements in the sealing arrangement: a sealing member accommodated by a hole in each end of the vane adjacent the axial shaft of the rotor, the hole preventing the sealing member from moving in any direction except axially and the hole contacting the periphery of the rotor shaft; and a spring means in the hole for urging the sealing member axially outward, the radially inner end of the end seal contacting the sealing member in air tight engagement in either circumferential direction and the end seals being movable relative to the sealing member in a radial direction to accommodate wear of the peripheral seal without allowing leakage between the radially innermost ends of the end seal and the rotor shaft.
Claim 3
Dependent Claim
40 words
A sealing arrangement for an air compressor as defined in claim 1 wherein the sealing member is provided with a groove of a shape to receive the radially innermost end of the end seal which is inserted into the groove.
Claim 4
Dependent Claim
56 words
A sealing arrangement for an air compressor as defined in claim 1 wherein the sealing member is provided with a tongue between a pair of cutaway portions, and the end seal consists of a pair of seal pieces mounted parallel to one another with their radially innermost ends in engagement with the sides of the tongue.
Claim 5
Dependent Claim
48 words
A sealing arrangement for an air compressor as defined in claim 1 wherein the radially outermost end of the end seal overlaps the end of the peripheral seal to seal clearance spaces provided at the ends of the peripheral seal to accommodate thermal expansion of the peripheral seal.
Claim 6
Dependent Claim
38 words
A sealing arrangement for an air compressor as defined in claim 4 wherein the peripheral seal is a pair of sealing pieces mounted parallel to one another and sandwiching between the sides of their ends the end seal.
Claim 7
Dependent Claim
31 words
A sealing arrangement for an air compressor as defined in claim 4 wherein the peripheral seal is sandwiched between the radially outermost ends of a pair of parallel end seal pieces.
Claim 8
Dependent Claim
38 words
A sealing arrangement for an air compressor as defined in claim 1 wherein the sealing member is of cylindrical shape, the hole therefor is of cylindrical shape, and has its axis parallel to the axis of the rotor.
Claim 9
Dependent Claim
34 words
A sealing arrangement as defined in claim 7 wherein the radially outermost end of the end seal abuts the underside of the end of the peripheral seal and is in the same radial plane.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |