Patent US5063904A successfully refreshed from Google Patents.
US5063904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanically driven supercharger for an internal combustion engine
Assignee: ZF Friedrichshafen AG
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Filing: 1988-08-31
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Granted: 1991-11-12
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Expires: 2008-08-31
Abstract
Abstract In a mechanically driven supercharger (1) whose rotor (6) is propelled by an internal combustion engine by way of a primary shaft (2), a planet gear (8) that is geared up and a rotor shaft (7), the working life of a support (11, 12) for the rotor shaft (7) is increased. For that purpose, the support floats with radial play (17) and axial play (19) in a fixed housing section (10) of the supercharger (1).
Inventors
- 👤 Siegfried Winkelmann
- 👤 Karl Schlichtig
- 👤 Harald Breisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:39
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/05; F04D29/056; F04D29/059; F02; F02B; F02B39/00; F02B39/02; F02B39/04; F02B39/14; F04D25/00; F04D25/02; F04D25/024; F04D25/028; F16; F16C; F16C2360/00; F16C2360/44; F16C35/00; F16C35/04; F16C35/06; F16C35/07; F16C35/077
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
139 words
In a mechanically driven supercharger including a fixed housing (10) containing a chamber (18) and a primary shaft (2) driven by an internal combustion engine, a rotor shaft (7) coaxial with and driven by the primary shaft via a planetary gear (8) and sun gear (9) assembly to rotate a rotor (6), the improvement which comprises (a) means for supporting said rotor shaft within the supercharger housing chamber, said supporting means having radial (17) and axial (19) play relative to said housing and comprising spaced angular ball bearings (11, 12); and (b) damping means for suspending said angular ball bearings in a floating manner within an annular gap defined by the radial play, said damping means including (1) a flow of lubricating oil for said angular ball bearings; and (2) a flexible ring (20) for sealing said annular gap.
Claim 2
Dependent Claim
139 words
In a mechanically driven supercharger including a fixed housing (10) containing a chamber (18) and a primary shaft (2) driven by an internal combustion engine, a rotor shaft (7) coaxial with and driven by the primary shaft via a planetary gear (8) and sun gear (9) assembly to rotate a rotor (6), the improvement which comprises (a) means for supporting said rotor shaft within the supercharger housing chamber, said supporting means having radial (17) and axial (19) play relative to said housing and comprising spaced angular ball bearings (11, 12); and (b) damping means for suspending said angular ball bearings in a floating manner within an annular gap defined by the radial play, said damping means including (1) a flow of lubricating oil for said angular ball bearings; and (2) a flexible ring (20) for sealing said annular gap.
Claim 3
Dependent Claim
29 words
A supercharger as defined in claim 1, wherein said radial and axial play is less than or equal to 0.1 mm and preferably on the order of 0.05 mm.
Claim 4
Dependent Claim
20 words
A supercharger as defined in claim 1, wherein said supporting means is arranged between the rotor and the planetary gear.
Claim 5
Dependent Claim
29 words
A supercharger as defined in claim 1, wherein said angular ball bearings are arranged in a cylindrical guide bearing (13) supported in a floating manner within said housing chamber.
Claim 6
Dependent Claim
47 words
A supercharger as defined in claim 4, wherein said guide bearing is supported at one end by a radial collar (14) arranged adjacent the rotor and at the other end by a ring (15), said ring and collar being axially spaced from surfaces (16) of the housing.
Claim 7
Dependent Claim
33 words
A supercharger as defined in claim 1, wherein said rotor is preassembled and counterbalanced as a unitary assembly with the rotor shaft, said angular ball bearings, said guide bearing, and the sun gear.
Claim 8
Dependent Claim
23 words
A supercharger as defined in claim 5, wherein said angular ball bearings include cages supported by one of said ring and said collar.
Claim 9
Dependent Claim
44 words
A supercharger as defined in claim 1, and further comprising a gasket (26) arranged between the rotor shaft and said guide bearing, whereby the lubricating oil for said angular ball bearings is confined to the area defined between said guide bearing and said gasket.
Claim 10
Dependent Claim
50 words
A supercharger as defined in claim 8, wherein said gasket includes a sealing lip (27) which raises under induction pressure from the rotor shaft, and further comprising a lubricating inlet (25) directly behind said gasket for delivering lubricating oil to said bearings in response to the increase in induction pressure.
Claim 11
Dependent Claim
33 words
A supercharger as defined in claim 9, wherein said guide bearing contains recesses (24, 29) in the outer surface thereof communicating with openings in said housing for the supply and return of lubricant.
References Cited (Backward Citations)
EP0158681A1
Cited
FR2580723A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |