Patent US3689195A successfully refreshed from Google Patents.
US3689195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glow plug
Assignee: Robert Bosch GmbH
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Filing: 1971-05-03
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Granted: 1972-09-05
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Expires: 1991-05-03
Abstract
Abstract A tubular casing is provided with two spaced ends and an electrode extends through the casing from one towards the other of these ends. A helically convoluted electrically conductive tubular member extends through the casing also and either surrounds the electrode or is located outwardly adjacent thereto. The tubular member has an inlet in the region of one end of the casing and at least one outlet in the region of the other end. A supply conduit supplies combustible fuel fluid to the inlet so that the fluid travels through the tubular member to the outlet thereof. An electrical heating wire is provided adjacent the outlet and conductively connected with the tubular member so that, when electricity is supplied to the heating wire and thus to the tubular member, the tubular member will become heated whereby the fluid will issue from the outlet as fuel vapor, to be ignited by the igniting means. The resistance wire can also be replaced by constituting the electrode as a glow pin.
Inventors
- 👤 Otto Beesch
- 👤 Karl Wolf
- 👤 Bodo Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:02
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02; F02N19/04; F02N19/06; F23; F23Q; F23Q7/00; F23Q7/001
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
143 words
A glow plug, comprising a tubular casing having two spaced ends; an elongated electrode extending through said casing from one toward the other of said ends; a helically convoluted electrically conductive tubular member extending intermediate said ends longitudinally of said electrode and said casing, said member having an inlet in the region of said one end at least one outlet in the region of said other end; at least one mounting element connecting said electrode and said member with said casing at least in the region of said one end; a supply supplying combustible fluid to the interior of said member through said inlet for travel to said outlet; and electrical means conductively connected with said member for heating said fluid during travel through said member so that the fluid issues as a vapor from said outlet, and for igniting the issued vapor.
Claim 2
Dependent Claim
143 words
A glow plug, comprising a tubular casing having two spaced ends; an elongated electrode extending through said casing from one toward the other of said ends; a helically convoluted electrically conductive tubular member extending intermediate said ends longitudinally of said electrode and said casing, said member having an inlet in the region of said one end at least one outlet in the region of said other end; at least one mounting element connecting said electrode and said member with said casing at least in the region of said one end; a supply supplying combustible fluid to the interior of said member through said inlet for travel to said outlet; and electrical means conductively connected with said member for heating said fluid during travel through said member so that the fluid issues as a vapor from said outlet, and for igniting the issued vapor.
Claim 3
Dependent Claim
29 words
A glow plug as defined in claim 1, said means comprising a resistance wire mounted within said casing and adapted to be connected to a source of electrical energy.
Claim 4
Dependent Claim
17 words
A glow plug as defined in claim 2, wherein said resistance wire is configurated as a helix.
Claim 5
Dependent Claim
66 words
A glow plug as defined in claim 2, said member having an end portion provided with said outlet, and said resistance wire being mounted adjacent but forwardly spaced from said end portion; and a partition interposed in said casing between said resistance wire and said end portion and having at least one aperture communicating with said outlet for access of said vapor to said ignition wire.
Claim 6
Dependent Claim
21 words
A glow plug as defined in claim 1, wherein said electrode is located with clearance within the confines of said member.
Claim 7
Dependent Claim
19 words
A glow plug as defined in claim 1, wherein said electrode is located outside the confines of said member.
Claim 8
Dependent Claim
15 words
A glow plug as defined in claim 1, wherein said electrode is a glow pin.
Claim 9
Dependent Claim
20 words
A glow plug as defined in claim 7, wherein said glow pin is located within the confines of said member.
Claim 10
Dependent Claim
20 words
A glow plug as defined in claim 7, wherein said glow pin is located outside the confines of said member.
Claim 11
Dependent Claim
20 words
A glow plug as defined in claim 1, wherein said electrical means and said member are electrically connected in parallelism.
Claim 12
Dependent Claim
20 words
A glow plug as defined in claim 1, wherein said electrical means and said member are electrically connected in series.
Claim 13
Dependent Claim
23 words
A glow plug as defined in claim 1, said casing comprising a flame-protecting apertured sleeve portion provided in the region of said outlet.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |