US3834183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive clutch
Assignee: Andreas Stihl AG and Co KG
•
Filing: 1973-01-10
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Granted: 1974-09-10
•
Expires: 1993-01-10
Abstract
Abstract A drive clutch, especially for detachably connecting a motor to a tool, in which the motor and tool have respective drums connected thereto adapted to be placed in coaxial, coextensive, telescopic relation. A friction element in the radial space between the drums frictionally connects the drums with each other. The friction element may be in the form of an undulating spring carried by one of the drums and engageable with the other.
Inventors
- 👤 E Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:21
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; F16D1/08; F16D1/0829; F16D1/0835; B; B24; B24B; B24B27/00; B24B27/06; B24B27/08; B27; B27B; B27B17/00; B27B17/0016; B27B17/08
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
177 words
A clutch especially adapted for connecting a motor, such as a chain saw motor, to an auxiliary working implement comprising; a first drum forming one part of the clutch, a second drum forming another part of the clutch, said drum being adapted to be disposed in coaxial coextensive relation with one of said parts being drivingly connected to said motor and the other of said parts being drivingly connected to said working implement, and an elastic friction element disposed between said drums for effecting releasable clutch driving connection therebetween, said friction element being in the form of an undulating spring band carried by one drum and having rounded peaks facing the other drum, said band being of metal adapted frictionally to engage said drums, said friction element being positively secured axially with regard to one drum having two annular shoulders of which the inner diameter of one shoulder located at an open end face side of the output drum is greater than the diameter on which are located friction surfaces of the other drum forming the clutch.
Claim 2
Dependent Claim
177 words
A clutch especially adapted for connecting a motor, such as a chain saw motor, to an auxiliary working implement comprising; a first drum forming one part of the clutch, a second drum forming another part of the clutch, said drum being adapted to be disposed in coaxial coextensive relation with one of said parts being drivingly connected to said motor and the other of said parts being drivingly connected to said working implement, and an elastic friction element disposed between said drums for effecting releasable clutch driving connection therebetween, said friction element being in the form of an undulating spring band carried by one drum and having rounded peaks facing the other drum, said band being of metal adapted frictionally to engage said drums, said friction element being positively secured axially with regard to one drum having two annular shoulders of which the inner diameter of one shoulder located at an open end face side of the output drum is greater than the diameter on which are located friction surfaces of the other drum forming the clutch.
Claim 3
Dependent Claim
117 words
A clutch especially adapted for connecting a motor, such as a chain saw motor, to an auxiliary working implement comprising; a first drum forming one part of the clutch, a second drum forming another part of the clutch, said drum being adapted to be disposed in coextensive relation with one of said parts being drivingly connected to said motor and the other of said parts being drivingly connected to said working implement, and an elastic friction element disposed between said drums for effecting driving connection therebetween, the inner one of said drums being closed on one side and open on the other side and having an outwardly facing peripheral surface which tapers outwardly toward said open side.
Claim 4
Dependent Claim
117 words
A clutch especially adapted for connecting a motor, such as a chain saw motor, to an auxiliary working implement comprising; a first drum forming one part of the clutch, a second drum forming another part of the clutch, said drum being adapted to be disposed in coextensive relation with one of said parts being drivingly connected to said motor and the other of said parts being drivingly connected to said working implement, and an elastic friction element disposed between said drums for effecting driving connection therebetween, the inner one of said drums being closed on one side and open on the other side and having an outwardly facing peripheral surface which tapers outwardly toward said open side.
Claim 5
Dependent Claim
22 words
A clutch according to claim 2 in which said friction element is substantially uniformly distributed about the common axis of said drums.
Claim 6
Dependent Claim
26 words
A clutch according to claim 2 in which said friction element is in the form of segments distributed uniformly about the common axis of said drums.
Claim 7
Dependent Claim
32 words
A clutch according to claim 2 in which said friction element is in the form of an undulating spring band carried by one drum and having rounded peaks facing the other drum.
Claim 8
Dependent Claim
19 words
A clutch according to claim 2 in which said friction element extends the full axial length of said drums.
Claim 9
Dependent Claim
44 words
A clutch according to claim 2 in which one of said drums is closed on one side and open on the other side, said friction element being carried by said one drum and extending from the closed side thereof to the open side thereof.
Claim 10
Dependent Claim
22 words
A clutch according to claim 2 in which said friction element in axial cross section is convex toward one of said drums.
Claim 11
Dependent Claim
34 words
A clutch according to claim 2 in which said friction element is carried by the outer one of said drums and in axial cross section is convex toward the inner one of said drums.
Claim 12
Dependent Claim
17 words
A clutch according to claim 2 in which the open side of said inner drum is chamfered.
Claim 13
Dependent Claim
25 words
A clutch according to claim 2 in which said friction element is a ribbon-like spring element which is undulating over the entire axial extent thereof.
Claim 14
Dependent Claim
22 words
A clutch according to claim 11 in which said spring element is undulating when in driving engagement with both of said drums.
Claim 15
Dependent Claim
28 words
A clutch according to claim 11 in which the flanks of an undulation of said spring element are disposed at an angle of about 140* to each other.
Claim 16
Dependent Claim
34 words
A clutch according to claim 11 in which said spring element in the form of a strip mounted inside the outer one of said drums with the ends of the strip in adjacent relation.
Claim 17
Dependent Claim
42 words
A clutch according to claim 11 in which said spring element is mounted in tHe outer one of said drums and has friction surfaces engaging the inwardly facing surface of said outer drum over the entire axial extent of said spring element.
Claim 18
Dependent Claim
55 words
A clutch according to claim 2 in which said friction element is mounted on the inner side of the outer of said drums, annular shoulders on said outer drum confining said friction element therebetween and at least the shoulder at the open side of said outer drum being larger in diameter than the inner drum.
Claim 19
Dependent Claim
36 words
A clutch according to claim 2 in which said friction element is a steel band adapted frictionally to engage said drums, and an intermediate element between said steel band and at least one of said drums.
Claim 20
Dependent Claim
24 words
A clutch according to claim 2 which includes an output element fixed to the outside of the closed end of one of said drums.
Claim 21
Dependent Claim
66 words
A clutch according to claim 2 in which the outer drum has an output member on the outer side o the closed end, a shaft journaled in said output member on the axis of said drum, a cap connected to the shaft and enclosing said output member, and an arm connected to said cap and adapted for being connected to the member supporting the inner drum.
Claim 22
Dependent Claim
28 words
A clutch according to claim 2 in which said friction element drivingly interconnects said drum in response to movement of said drums into telescoping relation with each other.
References Cited (Backward Citations)
US1962993A
Cited
US2074625A
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US2783794A
Cited
US2907190A
Cited
US3363478A
Cited
US3339596A
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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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |