US3716038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage coil boot
Assignee: Motorola Solutions Inc
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Filing: 1971-03-31
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Granted: 1973-02-13
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Expires: 1991-03-31
Abstract
Abstract A high voltage coil boot for connecting an ignition coil and a spark plug together comprising a tubular sleeve of resilient electrical insulating material including a collar portion intermediate the ends of the sleeve and having a ramp portion with an air vent to facilitate mounting of the coil onto the boot mounted spark plug. The portion of the collar which prevents disengagement from the coil may be either sawtooth or rounded. With the ignition coil mounted over the boot, the collar is deflected to form an inner annular lip below a spark plug rib to resist disengagement thereof. Portions on each end of the tubular sleeve provide additional sealing and shock mounting.
Inventors
- 👤 L Bevacqua
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:21
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/12; H01T; H01T13/00; H01T13/02; H01T13/06; H01F2038/122
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
A high voltage coil boot for mounting an ignition coil on a spark plug, comprising a tubular sleeve of resilient electrically insulating material having a collar portion projecting outwardly from said sleeve intermediate the ends thereof, said sleeve being fitted about said spark plug and said collar portion being deflected inwardly against the spark plug with said ignition coil being mounted on said sleeve to form a sealing lip on the inside surface of said sleeve against the spark plug thereby fastening the ignition coil to the spark plug.
Claim 2
Dependent Claim
89 words
A high voltage coil boot for mounting an ignition coil on a spark plug, comprising a tubular sleeve of resilient electrically insulating material having a collar portion projecting outwardly from said sleeve intermediate the ends thereof, said sleeve being fitted about said spark plug and said collar portion being deflected inwardly against the spark plug with said ignition coil being mounted on said sleeve to form a sealing lip on the inside surface of said sleeve against the spark plug thereby fastening the ignition coil to the spark plug.
Claim 3
Dependent Claim
89 words
A high voltage coil boot for mounting an ignition coil on a spark plug, comprising a tubular sleeve of resilient electrically insulating material having a collar portion projecting outwardly from said sleeve intermediate the ends thereof, said sleeve being fitted about said spark plug and said collar portion being deflected inwardly against the spark plug with said ignition coil being mounted on said sleeve to form a sealing lip on the inside surface of said sleeve against the spark plug thereby fastening the ignition coil to the spark plug.
Claim 4
Dependent Claim
89 words
A high voltage coil boot for mounting an ignition coil on a spark plug, comprising a tubular sleeve of resilient electrically insulating material having a collar portion projecting outwardly from said sleeve intermediate the ends thereof, said sleeve being fitted about said spark plug and said collar portion being deflected inwardly against the spark plug with said ignition coil being mounted on said sleeve to form a sealing lip on the inside surface of said sleeve against the spark plug thereby fastening the ignition coil to the spark plug.
Claim 5
Dependent Claim
49 words
The high voltage coil boot according to claim 1 wherein said sleeve includes a ring-like base portion, said base portion engaging said spark plug with the ignition coil being mounted to the plug over said boot thereby sealing said coil and plug from moisture and providing a shock mounting.
Claim 6
Dependent Claim
45 words
The high voltage coil boot according to claim 2 wherein said sleeve further includes a top portion longitudinally displaced from said base, said top portion providing insulation between said spark plug and said ignition coil and shock mounting said ignition coil to said spark plug.
Claim 7
Dependent Claim
33 words
The high voltage coil boot according to claim 1 wherein said collar includes a ramp portion positioned to facilitate the mounting of the ignition coil over said boot and onto the spark plug.
Claim 8
Dependent Claim
33 words
The high voltage coil boot according to claim 1 wherein said collar includes a sawtooth corner at its greatest diameter to prevent disengagement of the ignition coil from the boot mounted spark plug.
Claim 9
Dependent Claim
43 words
The high voltage coil boot according to claim 1 wherein said sleeve further includes an air vent slot to prevent formation of an air cushion in said ignition coil thereby insuring a tight seal between said boot, said coil and said spark plug.
Claim 10
Dependent Claim
132 words
A high voltage coil boot for connecting a spark plug having at least one rib portion about the body thereof to an ignition coil having a bore therein including in combination, a tubular sleeve of resilient electrically insulating material, said sleeve having a collar and being mounted on the body of said spark plug, said collar having a ramp portion and a diameter at the base of said ramp portion greater than the diameter of the bore in the ignition coil, and said coil being mounted to the plug over said ramp portion in an interference fit with said collar thereby deflecting said sleeve inwardly to form a sealing lip engaging the spark plug beneath said rib portion, said sealing lip substantially preventing the removal of the coil from the spark plug.
Claim 11
Dependent Claim
132 words
A high voltage coil boot for connecting a spark plug having at least one rib portion about the body thereof to an ignition coil having a bore therein including in combination, a tubular sleeve of resilient electrically insulating material, said sleeve having a collar and being mounted on the body of said spark plug, said collar having a ramp portion and a diameter at the base of said ramp portion greater than the diameter of the bore in the ignition coil, and said coil being mounted to the plug over said ramp portion in an interference fit with said collar thereby deflecting said sleeve inwardly to form a sealing lip engaging the spark plug beneath said rib portion, said sealing lip substantially preventing the removal of the coil from the spark plug.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |