US3561798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disconnect switch having internally clamped rotary coupling
Assignee: Allis Chalmers Corp
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Filing: 1969-10-13
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Granted: 1971-02-09
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Expires: 1989-10-13
Abstract
Abstract The hollow tubular rotatable control rod of an electrical disconnect switch is connected to a yoke which effects rotary movement thereof by means of a slotted hollow cylindrical member on the yoke which projects into one end of the hollow rod. Each slot is provided with a taper key located therein. A frustoconical nut is drawn up inside the member on the yoke to cause radial movement of the taper keys and a snug fit between exterior surface of the latter and the interior surface of the rod.
Inventors
- 👤 Calvin E Redfern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:27
CPC Classifications
F; F16; F16C; F16C7/00; F16C7/02; F16C3/00; F16C3/02; F16C3/026; F16D; F16D1/00; F16D1/06; F16D1/08; F16D1/0876; F16D1/0882; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7047; Y10T403/7051; Y10T403/7052; Y10T403/7054; Y10T403/7056
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
In a coupling, a rod having a smooth bored opening extending axially into one end thereof, a rotatable yoke for rigidly connecting to said rod, said yoke having a projection with a substantially smooth outer periphery projection thereon extending into said opening, said projection having a frustoconical opening therein and a plurality of slots therein, a frustoconical eXpansion nut in said opening in said projection, a taper key in each slot, and a bolt extending through an opening in said yoke for engagement with said nut and rotatable to draw said nut into said projection to cause outward radial movement of said taper keys and their engagement with the wall of the opening in said rod, said frustoconical opening and slots extending the full length of said projection and said taper keys being substantially equal in length to the length of said slots to achieve maximum physical contact and an even distribution of stresses upon transfer of torque from said yoke to said rod.
Claim 2
Dependent Claim
164 words
In a coupling, a rod having a smooth bored opening extending axially into one end thereof, a rotatable yoke for rigidly connecting to said rod, said yoke having a projection with a substantially smooth outer periphery projection thereon extending into said opening, said projection having a frustoconical opening therein and a plurality of slots therein, a frustoconical eXpansion nut in said opening in said projection, a taper key in each slot, and a bolt extending through an opening in said yoke for engagement with said nut and rotatable to draw said nut into said projection to cause outward radial movement of said taper keys and their engagement with the wall of the opening in said rod, said frustoconical opening and slots extending the full length of said projection and said taper keys being substantially equal in length to the length of said slots to achieve maximum physical contact and an even distribution of stresses upon transfer of torque from said yoke to said rod.
Claim 3
Dependent Claim
26 words
A coupling according to claim 1 wherein each of said taper keys has at least one projection thereon for engagement with the wall of said rod.
Claim 4
Dependent Claim
24 words
A coupling according to claim 2 including means for securing said taper keys in said slots when said yoke is disassociated from said rod.
Claim 5
Dependent Claim
27 words
A coupling according to claim 3 wherein said means for securing said taper key comprises a wire engageable in a notch in the projection on said yoke.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |