Patent US551786A successfully refreshed from Google Patents.
US3742784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential mechanism
Assignee: Auburn Gear Inc
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Filing: 1971-08-11
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Granted: 1973-07-03
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Expires: 1991-08-11
Abstract
Abstract A cone shaped friction element adapted to be made from powdered metal technology and used in a limited slip differential is disclosed. The friction element has a spiralling lubrication groove along a conical surface thereof. The lubrication groove is formed so that the friction element may be easily removed from a die in which it is formed from powdered metal.
Inventors
- 👤 J Engle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:22
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/04; F16H57/042; F16H57/0427; F16H48/00; F16H48/06; F16H48/08; F16H48/20; F16H48/22; F16H57/048; F16H57/0482; F16H57/0483; F16H2048/085; F16H48/38; F16H48/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
235 words
A limited slip differential mechanism comprising a differential cast casing receiving an inpUt torque for transmission to a pair of coaxially aligned relatively rotatable output shafts, said casing including a pair of coaxially aligned spaced apart hubs to receive the output shafts, at least one conically shaped drum surface formed in the interior of said cast casing, at least one conically shaped clutch member disposed within said casing and connected to one of the output shafts, means urging said clutch member into a predetermined friction engagement with said drum surface, a bevel gear system disposed within said casing including at least one side gear connected to the output shaft for transmission of rotational effort thereto, said bevel gear system applying an axial force upon said clutch member in a direction to alter said frictional engagement, means to allow entry of lubricant into said casing, at least one lubricant channel formed in said drum defining an opening extending laterally therefrom, said channel including a surface disposed opposite said opening which extends laterally of said drum parallel to the longitudinal axes of said hubs, and a spirally progressing groove formed in said conically shaped clutch member defining a series of lands between adjacent portions thereof, said lands forming said conical surface for contacting said drum, said groove being defined by only two sides, one of said sides being substantially parallel to the longitudinal axes of said cone.
Claim 2
Dependent Claim
235 words
A limited slip differential mechanism comprising a differential cast casing receiving an inpUt torque for transmission to a pair of coaxially aligned relatively rotatable output shafts, said casing including a pair of coaxially aligned spaced apart hubs to receive the output shafts, at least one conically shaped drum surface formed in the interior of said cast casing, at least one conically shaped clutch member disposed within said casing and connected to one of the output shafts, means urging said clutch member into a predetermined friction engagement with said drum surface, a bevel gear system disposed within said casing including at least one side gear connected to the output shaft for transmission of rotational effort thereto, said bevel gear system applying an axial force upon said clutch member in a direction to alter said frictional engagement, means to allow entry of lubricant into said casing, at least one lubricant channel formed in said drum defining an opening extending laterally therefrom, said channel including a surface disposed opposite said opening which extends laterally of said drum parallel to the longitudinal axes of said hubs, and a spirally progressing groove formed in said conically shaped clutch member defining a series of lands between adjacent portions thereof, said lands forming said conical surface for contacting said drum, said groove being defined by only two sides, one of said sides being substantially parallel to the longitudinal axes of said cone.
Claim 3
Dependent Claim
77 words
A cone shaped friction element for use in a limited slip differential, said friction element having a means to supply lubricant, said means being a spirally progressing groove defining lands intermediate successive portions thereof, said lands forming said conical surface, said groove being defined by only two sides, one side of said groove being substantially parallel to the axis of said cone, the other side of said groove being substantially perpendicular to the axis of said cone.
Claim 4
Dependent Claim
77 words
A cone shaped friction element for use in a limited slip differential, said friction element having a means to supply lubricant, said means being a spirally progressing groove defining lands intermediate successive portions thereof, said lands forming said conical surface, said groove being defined by only two sides, one side of said groove being substantially parallel to the axis of said cone, the other side of said groove being substantially perpendicular to the axis of said cone.
Claim 5
Dependent Claim
25 words
A friction element as in claim 2 wherein said friction element has a bore along the central axis thereof, said bore having splines formed therein.
Claim 6
Dependent Claim
31 words
A cone shaped friction element as in claim 2 wherein at least one side of said cone has a recessed surface, said recessed surface being adapted to receive an actuating force.
Claim 7
Dependent Claim
18 words
A friction element as in claim 4 which is formed of powdered metal by compression in a die.
Claim 8
Dependent Claim
105 words
A friction clutch member for use in a limited slip differential, said friction clutch member being of conical form and having a conical surface thereon, said conical surface for frictionally engaging a mating surface, said friction member having means to supply lubricant, said means comprising a spirally progressing channel formed in said conical surface, said channel having only two sides, one of said sides of said channel being substantially parallel to the axis of said cone, the other side of said channel being substantially perpendicular to the axis of said cone, said channel defining lands intermediate successive portions thereof, said lands forming said conical surface.
Claim 9
Dependent Claim
105 words
A friction clutch member for use in a limited slip differential, said friction clutch member being of conical form and having a conical surface thereon, said conical surface for frictionally engaging a mating surface, said friction member having means to supply lubricant, said means comprising a spirally progressing channel formed in said conical surface, said channel having only two sides, one of said sides of said channel being substantially parallel to the axis of said cone, the other side of said channel being substantially perpendicular to the axis of said cone, said channel defining lands intermediate successive portions thereof, said lands forming said conical surface.
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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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |