Patent US3831401A successfully refreshed from Google Patents.
US3831401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slip clutch for outboard motor
Assignee: Individual
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Filing: 1973-08-30
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Granted: 1974-08-27
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Expires: 1993-08-30
Abstract
Abstract An improved slip clutch for outboard motors which prevents damage to the propeller and drive train and which eliminates shear pin breakage. The clutch friction mechanism is incorporated within a propeller hub while the mechanism for maintaining the clutch pre-load is housed within a special hub nut designed for ease of calibration and resistance to corrosion and abrasion.
Inventors
- 👤 M Hurwitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:15
CPC Classifications
F; F16; F16D; F16D7/00; F16D7/02; F16D7/024; B; B63; B63H; B63H20/00; B63H20/14; B63H23/00; B63H23/30; B63H23/02; B63H2023/0291; F02; F02B; F02B61/00; F02B61/04; F02B61/045; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/945
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
171 words
In combination a driving shaft threaded at one end and having a transverse driving pin, a driven member having a generally cylindrical hub having an end face, a conical rearwardly tapering driving clutch member carried on said shaft and having a transverse slot receiving said driving pin, a friction clutch element having a conical bore and constituting a driven friction clutch member coacting with said driving clutch member, said driven friction clutch member being fixed in said driven member, an adjusting member in threaded engagement with said shaft, said adjusting member having an end face having an annular recess therein which is disposed in confronting relation to the end face of the hub, an elastomeric ring received in said recess, a pressure ring partially received in said annular recess in abutment with said elastomeric ring and in thrust engagement with the end face of the hub of the driven member, said adjusting member being adjustable to effect a desired axial pre-load force to maintain contact between said driving and driven members.
Claim 2
Dependent Claim
171 words
In combination a driving shaft threaded at one end and having a transverse driving pin, a driven member having a generally cylindrical hub having an end face, a conical rearwardly tapering driving clutch member carried on said shaft and having a transverse slot receiving said driving pin, a friction clutch element having a conical bore and constituting a driven friction clutch member coacting with said driving clutch member, said driven friction clutch member being fixed in said driven member, an adjusting member in threaded engagement with said shaft, said adjusting member having an end face having an annular recess therein which is disposed in confronting relation to the end face of the hub, an elastomeric ring received in said recess, a pressure ring partially received in said annular recess in abutment with said elastomeric ring and in thrust engagement with the end face of the hub of the driven member, said adjusting member being adjustable to effect a desired axial pre-load force to maintain contact between said driving and driven members.
Claim 3
Dependent Claim
19 words
The invention as defined in claim 1 including means for locking said adjusting member in a position of adjustment.
Claim 4
Dependent Claim
30 words
The invention as defined in claim 1 in which the driving clutch member is formed of metal and the driven clutch member is formed of an asbestos based clutch material.
Claim 5
Dependent Claim
19 words
The invention as defined in claim 1 in which the pressure ring is formed of a reinforced fluorocarbon material.
Claim 6
Dependent Claim
15 words
The invention as defined in claim 1 in which the driven member is a propeller.
Claim 7
Dependent Claim
17 words
The invention as defined in claim 1 in which the adjusting member is formed of a polyamide.
Claim 8
Dependent Claim
49 words
The invention as defined in claim 2 in which the locking means includes a plurality of spaced radial holes in said adjusting member and a pin extending through said shaft and certain of said radial holes to hold said adjusting member in a desired position relative to said shaft.
Claim 9
Dependent Claim
32 words
The invention as defined in claim 7 including a peripheral groove in said adjusting member in registration with said openings and an elastomeric band in said peripheral groove to retain said pin.
Claim 10
Dependent Claim
20 words
The invention as defined in claim 1 in which the adjusting member is formed of an acetal resin plastic material.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |