US6220417B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch cup
Assignee: Andreas Stihl AG and Co KG
•
Filing: 1998-08-05
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Granted: 2001-04-24
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Expires: 2018-08-05
Abstract
Abstract A clutch cup for a centrifugal clutch of a hand-held working tool, driven by an internal combustion engine, has a clutch drum and a hub coaxially fastened to the clutch drum. A bearing bushing is arranged in the hub and fastened to the hub by a frictional and positive-locking connection. A receiving member is coaxially fastened to the hub and receives the drive shaft for driving the tool.
Inventors
- 👤 Peter Linsbauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:50
CPC Classifications
F; F16; F16D; F16D43/00; F16D43/02; F16D43/04; F16D43/14; F16D43/18; F16D1/00; F16D1/06; F16D1/064; F16D1/072; Y; Y10; Y10T; Y10T403/00; Y10T403/49; Y10T403/4941
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
236 words
A clutch assembly ( 1 ) for a centrifugal clutch of a hand-held working tool driven by an internal combustion engine, said clutch assembly ( 1 ) comprising: a clutch drum ( 2 ); a hub ( 3 ) coaxially formed with said clutch drum ( 2 ); a bearing bushing ( 5 ) arranged in said hub ( 3 ) and fastened to said hub ( 3 ) by a frictional and positive locking connection ( 6 ); a receiving member ( 4 ), coaxially formed with said hub ( 3 ), for receiving a drive shaft ( 13 ); said clutch drum ( 2 ), said hub ( 3 ), and said receiving-member ( 4 ) being formed as a monolithic deep-drawn part; said hub ( 3 ) having radially extending, circumferentially arranged impressions ( 6 ) pressed into said bearing bushing ( 5 ); said bearing bushing ( 5 ) cooperating with axial abutments for position-securing said clutch cup ( 1 ) with play; said bearing bushing ( 5 ) being configured for receiving a crank shaft ( 10 ) having a shoulder ( 11 ) forming a first one of said axial abutments, said bearing bushing ( 5 ) being adapted for contacting said shoulder ( 11 ) and also being adapted for contacting a securing member forming a second one of said axial abutments for said bearing bushing ( 5 ).
Claim 2
Dependent Claim
236 words
A clutch assembly ( 1 ) for a centrifugal clutch of a hand-held working tool driven by an internal combustion engine, said clutch assembly ( 1 ) comprising: a clutch drum ( 2 ); a hub ( 3 ) coaxially formed with said clutch drum ( 2 ); a bearing bushing ( 5 ) arranged in said hub ( 3 ) and fastened to said hub ( 3 ) by a frictional and positive locking connection ( 6 ); a receiving member ( 4 ), coaxially formed with said hub ( 3 ), for receiving a drive shaft ( 13 ); said clutch drum ( 2 ), said hub ( 3 ), and said receiving-member ( 4 ) being formed as a monolithic deep-drawn part; said hub ( 3 ) having radially extending, circumferentially arranged impressions ( 6 ) pressed into said bearing bushing ( 5 ); said bearing bushing ( 5 ) cooperating with axial abutments for position-securing said clutch cup ( 1 ) with play; said bearing bushing ( 5 ) being configured for receiving a crank shaft ( 10 ) having a shoulder ( 11 ) forming a first one of said axial abutments, said bearing bushing ( 5 ) being adapted for contacting said shoulder ( 11 ) and also being adapted for contacting a securing member forming a second one of said axial abutments for said bearing bushing ( 5 ).
Claim 3
Dependent Claim
27 words
A clutch assembly ( 1 ) according to claim 1 , wherein said impressions ( 6 ) are circumferential grooves or part-circumferential grooves or a depression point.
Claim 4
Dependent Claim
23 words
A clutch assembly ( 1 ) according to claim 1 , wherein said impressions are depression points that are pointed, semispherical, or cylindrical.
Claim 5
Dependent Claim
31 words
A clutch assembly ( 1 ) according to claim 1 , wherein said impressions ( 6 ) are arranged on one or more circumferential circles of said hub ( 3 ).
Claim 6
Dependent Claim
41 words
A clutch assembly ( 1 ) according to claim 4 , wherein said impressions ( 6 ) are arranged in pairs, wherein said impressions of each one of said pairs are positioned opposite one another on one of said circumferential circles.
Claim 7
Dependent Claim
28 words
A clutch assembly ( 1 ) according to claim 4 , wherein said impressions ( 6 ) are spaced at an angle of 120° on said circumferential circle.
Claim 8
Dependent Claim
55 words
A clutch assembly ( 1 ) according to claim 1 , wherein said impressions ( 6 ) are shaped as a truncated cone having a diameter at a bottom of said truncated cone of 3 mm, a cone angle of 30°, and a depth of penetration into said hub ( 3 ) of >0.5 mm.
Claim 9
Dependent Claim
34 words
A clutch assembly ( 1 ) according to claim 1 , wherein said impressions ( 6 ) are formed during pressing of said bearing bushing ( 5 ) into said hub ( 3 ).
Claim 10
Dependent Claim
34 words
A clutch assembly ( 1 ) according to claim 1 , wherein said securing member is a screw ( 8 ) that is threaded coaxially in the end of the crankshaft ( 10 ).
Claim 11
Dependent Claim
30 words
A clutch assembly ( 1 ) according to claim 9 , wherein said receiving element ( 4 ) is configured to provide access for tightening said screw ( 8 ).
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) | 2004-04-23 | 2004-10-23 | 2005-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-04-23 | 2008-10-23 | 2009-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-04-23 | 2012-10-23 | 2013-04-24 | $7700.00 | Window Closed / Lapsed |