Patent US3570640A successfully refreshed from Google Patents.
US3570640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch bearing assembly
Assignee: Stewart Warner Corp
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Filing: 1968-09-18
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Granted: 1971-03-16
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Expires: 1988-09-18
Abstract
Abstract An electromagnetic clutch employing a unitary inner ball bearing race member and shaft coupler and a concentric, unitary, outer ball bearing race member and driving friction plate support and electron beam welded to the friction plate which eliminates the need for separate snaprings, bearing sleeve and armature hub while reducing overall size without compromising load capacity.
Inventors
- 👤 Roger G Martz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:29
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/02; F16D27/04; F16D27/06; F16D2027/008; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49696
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
115 words
In a simplified electromagnetic clutch including a driving friction member, a driven member for coupling to a shaft, an armature carried by said driven member for frictional contact with said driving friction member to move said driven member, an electromagnetic coil operatively positioned relative to said armature for attracting said armature into frictional contact with said driving friction member, and bearing means supporting said driving and driven members for relative movement therebetween in the absence of coil energization, the improvement wherein; said bearing means includes an inner bearing member and an outer bearing member concentric with said inner bearing member and having an integral driving friction plate support butt welded to said driving friction member.
Claim 2
Dependent Claim
115 words
In a simplified electromagnetic clutch including a driving friction member, a driven member for coupling to a shaft, an armature carried by said driven member for frictional contact with said driving friction member to move said driven member, an electromagnetic coil operatively positioned relative to said armature for attracting said armature into frictional contact with said driving friction member, and bearing means supporting said driving and driven members for relative movement therebetween in the absence of coil energization, the improvement wherein; said bearing means includes an inner bearing member and an outer bearing member concentric with said inner bearing member and having an integral driving friction plate support butt welded to said driving friction member.
Claim 3
Dependent Claim
71 words
The electromagnetic clutch claimed in claim 1 in which said driving plate support comprises a radial flange on said outer bearing member, and said driving friction mEmber comprises a ring having a plurality of radially inwardly directed struts thereon electron beam butt welded to the periphery of said flange with the spaces between said struts defining a plurality of circumferentially spaced passageways for magnetic flux between said coil and said armature.
Claim 4
Dependent Claim
86 words
The electromagnetic clutch claimed in claim 2 in which said inner bearing member comprises a cast metal with a hardened bearing surface integrally formed on said driven member, said outer bearing member comprises a cast metal with a hardened bearing surface formed thereon in opposed position to said inner bearing member surface, said bearing means comprises a plurality of balls engaging said opposed bearing surfaces, and said inner and outer bearing means have respective integrally formed cooperating surfaces thereon for preventing axial movement of said balls.
Claim 5
Independent Claim
164 words
A method of fabricating a driving friction member for an electromagnetic clutch of the type including a driven member for coupling to a shaft, an armature carried by said driven member for frictional contact with said driving friction member to move said driven member, an electromagnetic coil operatively positioned relative to said armature, and concentric inner and outer bearing means for supporting said driven and driving members respectively for relative movement therebetween in the absence of coil energization, the improvement comprising the steps of providing a ring on said outer bearing member extending radially outwardly of said bearing member, providing an annular drive plate having a plurality of circumferentially spaced recesses formed along the inner edge periphery of said annular drive plate to define struts between said recesses, and butt welding said struts to the outer periphery of said ring whereby said recesses form magnetic flux passageways of relatively narrow width as compared to the thickness of said drive plate for attracting said armature.
Claim 6
Independent Claim
164 words
A method of fabricating a driving friction member for an electromagnetic clutch of the type including a driven member for coupling to a shaft, an armature carried by said driven member for frictional contact with said driving friction member to move said driven member, an electromagnetic coil operatively positioned relative to said armature, and concentric inner and outer bearing means for supporting said driven and driving members respectively for relative movement therebetween in the absence of coil energization, the improvement comprising the steps of providing a ring on said outer bearing member extending radially outwardly of said bearing member, providing an annular drive plate having a plurality of circumferentially spaced recesses formed along the inner edge periphery of said annular drive plate to define struts between said recesses, and butt welding said struts to the outer periphery of said ring whereby said recesses form magnetic flux passageways of relatively narrow width as compared to the thickness of said drive plate for attracting said armature.
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |