US5199721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crankshaft seal for an internal combustion engine
Assignee: Carl Freudenberg KG
•
Filing: 1992-02-21
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Granted: 1993-04-06
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Expires: 2012-02-21
Abstract
Abstract Crankshaft seal for an internal combustion engine, comprising a die cast metal carrier (1) with a lipped ring of polymeric material which is fastened to the carrier by means of a support piece (2) of sheet metal. The support piece (2) is defined by a radially outwardly projecting flange section (2.1), the flange section (2.1) being held in an axially open recess (1.1) of the carrier (1) and being provided on the side facing axially away from the carrier (1) with at least one axially protruding sealing lip (3.1,3.2).
Inventors
- 👤 Wolfgang Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:19
CPC Classifications
F; F02; F02F; F02F11/00; F02F11/007; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3268
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
140 words
Crankshaft seal assembly for an internal combustion engine having a block and a crankshaft, said assembly comprising a die cast carrier having an aperture for receiving said crankshaft axially therethrough and an axially open recess about said aperture, a support piece formed of sheet metal and having an aperture for receiving said crankshaft therethrough and a flange extending radially outward from said aperture in said piece, said flange being received in said recess in said carrier, a ring of polymeric material fixed to said support piece about said aperture in said piece, thereby providing sealing means for said crankshaft, and a seal fixed to said flange of said support piece opposite said carrier and having at least one axially projecting sealing lip which provides sealing means for said engine block, said seal being non-integral with said ring of polymeric material.
Claim 2
Dependent Claim
140 words
Crankshaft seal assembly for an internal combustion engine having a block and a crankshaft, said assembly comprising a die cast carrier having an aperture for receiving said crankshaft axially therethrough and an axially open recess about said aperture, a support piece formed of sheet metal and having an aperture for receiving said crankshaft therethrough and a flange extending radially outward from said aperture in said piece, said flange being received in said recess in said carrier, a ring of polymeric material fixed to said support piece about said aperture in said piece, thereby providing sealing means for said crankshaft, and a seal fixed to said flange of said support piece opposite said carrier and having at least one axially projecting sealing lip which provides sealing means for said engine block, said seal being non-integral with said ring of polymeric material.
Claim 3
Dependent Claim
57 words
Crankshaft seal assembly as in claim 1 wherein said carrier has a transverse surface running in a plane parallel to the crankshaft, said seal having a transverse lip which, prior to installation on said engine, extends axially beyond said at least one axially extending sealing lip but does not extend beyond the plane of said transverse surface.
Claim 4
Dependent Claim
25 words
Crankshaft seal assembly as in claim 1 wherein said at least one axially extending sealing lip comprises a plurality of parallel axially extending sealing lips.
Claim 5
Dependent Claim
18 words
Crankshaft seal assembly as in claim 1 wherein said support piece is joined to said carrier by adhesive.
Claim 6
Dependent Claim
14 words
Crankshaft seal assembly as in claim 1 wherein said support piece is deep drawn.
Claim 7
Dependent Claim
15 words
Crankshaft seal assembly as in claim 1 wherein said carrier is pressure cast light metal.
Claim 8
Dependent Claim
25 words
Crankshaft seal assembly as in claim 1 wherein said recess has a depth and said flange has a thickness which is less than said depth.
References Cited (Backward Citations)
NL78715C
Cited
US2958551A
Cited
US3917286A
Cited
US4155560A
Cited
US4278261A
Cited
US4304416A
Cited
GB2085096A
Cited
US4484751A
Cited
GB2147666A
Cited
US4928980A
Cited
US4799691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-05 | 1996-10-05 | 1997-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-05 | 2000-10-05 | 2001-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-05 | 2004-10-05 | 2005-04-06 | $7700.00 | Window Closed / Lapsed |