Patent US3766453A successfully refreshed from Google Patents.
US3766453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starter drive for combustion engines
Assignee: Robert Bosch GmbH
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Filing: 1972-04-03
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Granted: 1973-10-16
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Expires: 1992-04-03
Abstract
Abstract A housing has an opening and accommodates an electric starter motor whose output shaft extends outside through the opening. Connected at the opening is a gear unit cooperating with the output shaft, and located in the opening to protect the interior of the housing against the entry of contaminants is a cupped insert a flange of which is connected with the housing and a transverse wall of which has an opening through which the motor output shaft extends and which is sealed by a sealing ring in sealing engagement with the transverse wall and with the output shaft which the sealing ring surrounds.
Inventors
- 👤 J Schenk
- 👤 Ehrenstein C Von
- 👤 L Moreira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:08
CPC Classifications
F; F02; F02N; F02N11/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
202 words
In a starter drive for combustion engines, in combination, housing means having an opening; electric starter motor means in said housing means and having an output shaft extending with clearance outside through said opening; gear unit means connected with said housing means adjacent said opening; and closure means For protecting the interior of said housing means against entry of contaminants via said opening, comprising a cupped insert received in said opening and having a flange connected with said housing means, a peripheral wall and a bottom wall provided with an aperture whose diameter is only slightly larger than that of said output shaft and through which said output shaft extends, at least one sealing washer located inwardly of said bottom wall in abutment therewith and surrounding said output shaft in sealing engagement with the latter, said sealing washer having an outer periphery in engagement with an inner circumferential surface of said peripheral wall so that said sealing washer is centered by the latter with reference to said aperture, and said closure means further including an annular retaining washer surrounding said shaft with clearance inwardly of and in abutment with said sealing washer and being retained by abutment with said inner circumferential surface.
Claim 2
Dependent Claim
202 words
In a starter drive for combustion engines, in combination, housing means having an opening; electric starter motor means in said housing means and having an output shaft extending with clearance outside through said opening; gear unit means connected with said housing means adjacent said opening; and closure means For protecting the interior of said housing means against entry of contaminants via said opening, comprising a cupped insert received in said opening and having a flange connected with said housing means, a peripheral wall and a bottom wall provided with an aperture whose diameter is only slightly larger than that of said output shaft and through which said output shaft extends, at least one sealing washer located inwardly of said bottom wall in abutment therewith and surrounding said output shaft in sealing engagement with the latter, said sealing washer having an outer periphery in engagement with an inner circumferential surface of said peripheral wall so that said sealing washer is centered by the latter with reference to said aperture, and said closure means further including an annular retaining washer surrounding said shaft with clearance inwardly of and in abutment with said sealing washer and being retained by abutment with said inner circumferential surface.
Claim 3
Dependent Claim
22 words
In a starter drive as defined in claim 9, said gear unit means comprising an additional housing connected with said housing means.
Claim 4
Dependent Claim
44 words
In a starter drive as defined in claim 9, said output shaft having a portion extending beyond said gear unit means on a side thereof remote from said housing means; and further comprising a gear member carried by said portion of said output shaft.
Claim 5
Dependent Claim
48 words
In a starter drive as defined in claim 1; further comprising at least one radial projection on said peripheral wall engaging said retaining washer and maintaining it in pressure engagement with said sealing washer so that the latter is compressed between said retaining washer and said bottom wall.
Claim 6
Dependent Claim
37 words
In a starter drive as defined in claim 4, wherein said insert is a sheet material member; and wherein said projection is formed by an inwardly extending depression provided in the outer side of said peripheral wall.
Claim 7
Dependent Claim
17 words
In a starter drive as defined in claim 1, wherein said insert is a sheet material member.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |