US4818957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrite toroid isolator
Assignee: HP Inc
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Filing: 1988-03-31
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Granted: 1989-04-04
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Expires: 2008-03-31
Abstract
Abstract A ferrite toroid retainer 10 provides an apparatus for retaining ferrite toroids 1 on an electrical cable 2 to prevent chafing of the cable's insulation. The device is constructed from an elastomer material. Ferrite toroid retainer 10 is constructed from a toroidal sleeve 11 having an inside diameter B equal to that of the outside diameter A of electrical cable 2. The outside diameter C of ferrite toroid retainer 10 is equal to that of the inside diameter F of ferrite toroid 1. A retaining ridge 12 is attached around the circumference of one end of toroidal sleeve 11 and has a tapered leading edge 13. Attached around the circumference of the opposite end of toroidal sleeve 11 is a non-tapered retaining ridge 15. Perpendicular edges 14 prevent ferrite toroids 1 from sliding off of toroidal sleeve 11.
Inventors
- 👤 Robert W. Cort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:14
CPC Classifications
H; H05; H05K; H05K7/00; H01; H01F; H01F17/00; H01F17/04; H01F17/06; H05K9/00; H01F2017/065; H01F27/00; H01F27/02; H01F27/027; H01F27/24; H01F27/26; H01F27/266; H03; H03H; H03H1/00; H03H2001/0092
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
94 words
A ferrite toroid retainer for positioning a ferrite toroid on a cable which comprises a toroidal sleeve slideably mounted on said cable, said toroidal sleeve having an inside dimension of substantially equal to the outside dimension of said cable, said toroidal sleeve having an outside diameter substantially equal to the inside diameter of said ferrite toroid, said toroidal sleeve including a retaining ridge attached to and circumscribing each end thereof, and wherein at least one of said retaining ridges has a tapered leading edge to facilitate installing said ferrite toroid on said toroidal sleeve.
Claim 2
Dependent Claim
94 words
A ferrite toroid retainer for positioning a ferrite toroid on a cable which comprises a toroidal sleeve slideably mounted on said cable, said toroidal sleeve having an inside dimension of substantially equal to the outside dimension of said cable, said toroidal sleeve having an outside diameter substantially equal to the inside diameter of said ferrite toroid, said toroidal sleeve including a retaining ridge attached to and circumscribing each end thereof, and wherein at least one of said retaining ridges has a tapered leading edge to facilitate installing said ferrite toroid on said toroidal sleeve.
Claim 3
Dependent Claim
36 words
The ferrite toroid retainer of claim 1 wherein said tapered retaining ridge includes a compression notch formed in the perimeter of said tapered retaining ridge facilitating the installation of said ferrite toroid on said toroidal sleeve.
Claim 4
Dependent Claim
33 words
The ferrite toroid retainer of claim 2 further having a longitudinal slot disposed parallel to the longitudinal axis of said toroidal sleeve for facilitating installation of said ferrite toroid retainer on a cable.
Claim 5
Dependent Claim
12 words
The ferrite toroid retainer of claim 3 being made of an elastomer.
Claim 6
Dependent Claim
12 words
The ferrite toroid retainer of claim 1 is made of an elastomer.
Claim 7
Dependent Claim
143 words
A ferrite toroid retainer for stationary engagement of a ferrite toroid on a cable comprising a toroidal sleeve having an inside diameter slightly larger than the outside diameter of said cable, said toroidal sleeve having an outside diameter slightly larger than the inside diameter of said ferrite toroid, said toroidal sleeve including a retaining ridge attached to and circumscribing each end thereof, said retaining ridges each having tapered leading edges and a separation in their circumference, said toroidal sleeve further having a longitudinal slot parallel to the longitudinal axis of said toroidal sleeve and disposed along the entire length of said toroidal sleeve for facilitating installation of said toroidal sleeve on a cable and enhancing frictional engagement of said cable when fitted with said ferrite toroid, said separation in the circumference of each retaining ridge corresponding to and coincident with said longitudinal slot.
Claim 8
Dependent Claim
143 words
A ferrite toroid retainer for stationary engagement of a ferrite toroid on a cable comprising a toroidal sleeve having an inside diameter slightly larger than the outside diameter of said cable, said toroidal sleeve having an outside diameter slightly larger than the inside diameter of said ferrite toroid, said toroidal sleeve including a retaining ridge attached to and circumscribing each end thereof, said retaining ridges each having tapered leading edges and a separation in their circumference, said toroidal sleeve further having a longitudinal slot parallel to the longitudinal axis of said toroidal sleeve and disposed along the entire length of said toroidal sleeve for facilitating installation of said toroidal sleeve on a cable and enhancing frictional engagement of said cable when fitted with said ferrite toroid, said separation in the circumference of each retaining ridge corresponding to and coincident with said longitudinal slot.
Claim 9
Dependent Claim
36 words
The ferrite toroid retainer of claim 6 wherein said tapered retaining ridge includes a compression notch formed in the perimeter of said tapered retaining ridge facilitating the installation of said ferrite toroid on said toroidal sleeve.
Claim 10
Dependent Claim
12 words
The ferrite toroid retainer of claim 7 being made of an elastomer.
Claim 11
Dependent Claim
60 words
A ferrite toroid retainer for positioning a ferrite toroid on a cable comprising a toroidal sleeve slideably mounted on said cable, said toroidal sleeve having an inside dimension substantially equal to the outside dimension of said cable and having an outside diameter substantially equal to the inside diameter of said ferrite toroid, said toroidal sleeve being fabricated of an elastomer.
Claim 12
Dependent Claim
60 words
A ferrite toroid retainer for positioning a ferrite toroid on a cable comprising a toroidal sleeve slideably mounted on said cable, said toroidal sleeve having an inside dimension substantially equal to the outside dimension of said cable and having an outside diameter substantially equal to the inside diameter of said ferrite toroid, said toroidal sleeve being fabricated of an elastomer.
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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |