US4427202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination static oil seal and rotary dust seal
Assignee: Deutz Allis Corp
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Filing: 1982-08-30
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Granted: 1984-01-24
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Expires: 2002-08-30
Abstract
Abstract A combination seal for a rotating member having a stationary oil seal mounted on a housing and a rotating dust seal carried on a rotating member together with a slinger to throw off dust particles.
Inventors
- 👤 Robert R. Backlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:32
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/54; F16J15/16; F16J15/164
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
67 words
A combination oil seal and dust seal assembly comprising, a stationary means, a rotating member, an oil seal mounted on said stationary means engaging said rotating member, a dust seal carried on said rotating member and engaging said stationary means, a dust slinger carried on said rotating member shielding said dust seal and thereby providing a combination seal assembly between said stationary means and said rotating member.
Claim 2
Dependent Claim
67 words
A combination oil seal and dust seal assembly comprising, a stationary means, a rotating member, an oil seal mounted on said stationary means engaging said rotating member, a dust seal carried on said rotating member and engaging said stationary means, a dust slinger carried on said rotating member shielding said dust seal and thereby providing a combination seal assembly between said stationary means and said rotating member.
Claim 3
Dependent Claim
36 words
A combination oil seal and dust seal assembly as set forth in claim 1 wherein said slinger defines a radial and axial flange extending from its support on said rotating member to shield said dust seal.
Claim 4
Dependent Claim
58 words
A combination oil seal and dust seal assembly as set forth in claim 1 including means defining an annular recess in said stationary means, said slinger defines an axial supporting structure on said rotating member, a radial flange from said supporting structure and an axial flange for reception in said annular recess to form a labyrinth seal structure.
Claim 5
Dependent Claim
42 words
A combination oil seal and dust seal assembly as set forth in claim 1 wherein said oil seal defines a casing forming a radial facing, said rotating seal defines a lip biased for engaging said radial facing on said oil seal casing.
Claim 6
Dependent Claim
74 words
A combination oil seal and dust seal assembly as set forth in claim 1 wherein said stationary means defines an annular recess, said slinger defines a radial and an axial flange and said axial flange is received in said annular recess to form a labyrinth seal, and slinger defines an enclosure around said dust seal, means for supplying clean air to said enclosure to thereby provide a clean environment for said rotating dust seal.
Claim 7
Dependent Claim
29 words
A combination oil seal and dust seal assembly as set forth in claim 1 wherein said stationary means includes an engine housing, said rotating member includes an engine flywheel.
Claim 8
Dependent Claim
29 words
A combination oil seal and dust seal assembly as set forth in claim 1 wherein said stationary means includes an engine housing, said rotating member includes an engine crankshaft.
Claim 9
Dependent Claim
37 words
A combination oil seal and dust seal assembly as set forth in claim 1 wherein said oil seal engages an axial surface on said rotating member, said dust seal engages a radial surface on said stationary means.
Claim 10
Dependent Claim
31 words
A combination oil seal and dust seal assembly as set forth in claim 1 wherein said dust seal and said slinger define an integral combination with each forming a radial flange.
Claim 11
Dependent Claim
55 words
A combination oil seal and dust seal assembly as set forth in claim 1 wherein said oil seal defines a rubber lip engaging an axial surface on said rotating member, said dust seal defines a radial lip engaging a radial surface on said stationary means, said slinger defines a metal flange fielding said oil seal.
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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |