US4324318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust cover
Assignee: Tokico Ltd
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Filing: 1980-03-13
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Granted: 1982-04-13
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Expires: 2000-03-13
Abstract
Abstract A dust cover formed of a tubular flexible material and provided between a shaft and a body member which has a bore rotatably receiving the shaft. One end of the dust cover sealingly engages with the outer circumference of the shaft and with the inner circumference of a counterbored portion of the bore, and the other end of the dust cover sealingly engages with the outer circumference of the shaft.
Inventors
- 👤 Yasuo Karasudani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:55
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/16; F16D65/18; F16J; F16J15/00; F16J15/002; F16J15/008; F16J15/50; F16J15/52; F16D2121/00; F16D2121/14; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/22; F16D2125/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
A dust cover formed of a tubular flexible material and provided between a shaft and a body member which has a bore fittingly receiving the shaft therein, one end of the dust cover sealingly engaging with the outer circumference of the shaft and with the inner circumference of the body member, the other end of the dust cover sealingly engaging with the outer circumference of a portion of the shaft projecting out of the body member, and an annular lip which is formed on either of said ends of the dust cover and engages with the other of said ends of the dust cover in the radial direction, and a connecting portion connecting said ends of the dust cover for covering the shaft and the body member.
Claim 2
Dependent Claim
127 words
A dust cover formed of a tubular flexible material and provided between a shaft and a body member which has a bore fittingly receiving the shaft therein, one end of the dust cover sealingly engaging with the outer circumference of the shaft and with the inner circumference of the body member, the other end of the dust cover sealingly engaging with the outer circumference of a portion of the shaft projecting out of the body member, and an annular lip which is formed on either of said ends of the dust cover and engages with the other of said ends of the dust cover in the radial direction, and a connecting portion connecting said ends of the dust cover for covering the shaft and the body member.
Claim 3
Dependent Claim
72 words
A dust cover as set forth in claim 1 wherein a counterbored portion is formed in the outer end of said bore for sealingly receiving said one end of the dust cover, an annular groove is formed in the shaft for sealingly receiving said the other end of the dust cover, and the opposite ends of the dust cover abut with one another in the direction of the axis of the shaft.
Claim 4
Dependent Claim
31 words
A dust cover as set forth in claim 1 wherein a plurality of axially spaced annular projections is formed in the inner circumference of said one end of the dust cover.
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) | 1985-04-12 | 1985-10-12 | 1986-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-12 | 1989-10-12 | 1990-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-12 | 1993-10-12 | 1994-04-13 | $7700.00 | Window Closed / Lapsed |