Patent US3909186A successfully refreshed from Google Patents.
US3909186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Igniter mechanism
Assignee: Individual
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Filing: 1974-05-13
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Granted: 1975-09-30
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Expires: 1994-05-13
Abstract
Abstract Ignition apparatus for a gaseous fuel-burning orifice of a space heater, such as an orchard heater, is disclosed to comprise spark-producing elements located proximate to said orifice and caused to have relative movement derived from an expansible/contractible chamber responsive to the presence or absence of fluid fuel under pressure in a fuel supply communicating with said orifice.
Inventors
- 👤 Walter H Kidwell
- 👤 Walter Scott Kidwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:18
CPC Classifications
F; F23; F23Q; F23Q1/00; F23Q1/02; F23Q1/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
152 words
An igniter mechanism for association with the nozzle of a gaseous fuel burner for a space heater, comprising: a valved supply line for gaseous fuels; means forming an expansible/ contractible chamber in communication with said supply line to be expanded upon the occurrence of gaseous fuel under pressure in said supply line; an elongated stem communicably associated with said expansible chamber, said stem terminating in a fuel discharge orifice; abrader means carried by said stem in close proximity to said discharge orifice; releasible clutch means surrounding and engageable with said elongated stem when said espansible element is non-expanded; means operable upon a predetermined degree of expansion of said expansible member to release said clutch means to permit forcible movement of said elongated stem; and at least one spark-producing flint forcibly pressed to said abrader element and operable to produce a shower of sparks into a discharge of gaseous fuel from said orifice.
Claim 2
Dependent Claim
152 words
An igniter mechanism for association with the nozzle of a gaseous fuel burner for a space heater, comprising: a valved supply line for gaseous fuels; means forming an expansible/ contractible chamber in communication with said supply line to be expanded upon the occurrence of gaseous fuel under pressure in said supply line; an elongated stem communicably associated with said expansible chamber, said stem terminating in a fuel discharge orifice; abrader means carried by said stem in close proximity to said discharge orifice; releasible clutch means surrounding and engageable with said elongated stem when said espansible element is non-expanded; means operable upon a predetermined degree of expansion of said expansible member to release said clutch means to permit forcible movement of said elongated stem; and at least one spark-producing flint forcibly pressed to said abrader element and operable to produce a shower of sparks into a discharge of gaseous fuel from said orifice.
Claim 3
Dependent Claim
33 words
The structure of claim 1 in which the abrader means comprises an opposed pair of abrading surfaces carried by said stem, and there is a spark-producing flint pressed to each of said surfaces.
Claim 4
Dependent Claim
19 words
The structure of claim 1 in which the means forming the expansible chamber comprises a normally collapsed resilient bellows.
Claim 5
Dependent Claim
25 words
The structure of claim 1 in which the releasable clutch means comprises a collet-style chuck, and said stem has a shoulder engaged by said chuck.
Claim 6
Dependent Claim
36 words
The structure of claim 4 in which the means to release said clutch means comprise a fixedly mounted wedging member operable to open said collet-style chuck and disengage the same from the shoulder on said stem.
Claim 7
Dependent Claim
102 words
An igniter mechanism for association with a space heater, comprising: an upright, tubular stem mounted for the vertical, reciprocal movement, said stem having a discharge orifice at its upper end; a source of gaseous fuel under pressure including a supply Line communicating with said stem; expansible/contractible means responsive to the presence or absence of fuel under pressure in said supply line, said expansible/contractible means being associated with said stem to impart reciprocal motion thereto; and spark-producing means associated with the upper end of said stem operable to produce a shower of sparks adjacent said discharge orifice upon upward movement of said stem.
Claim 8
Dependent Claim
102 words
An igniter mechanism for association with a space heater, comprising: an upright, tubular stem mounted for the vertical, reciprocal movement, said stem having a discharge orifice at its upper end; a source of gaseous fuel under pressure including a supply Line communicating with said stem; expansible/contractible means responsive to the presence or absence of fuel under pressure in said supply line, said expansible/contractible means being associated with said stem to impart reciprocal motion thereto; and spark-producing means associated with the upper end of said stem operable to produce a shower of sparks adjacent said discharge orifice upon upward movement of said stem.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |