US3901155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-sealing ignition device
Assignee: Buck KG
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Filing: 1974-01-02
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Granted: 1975-08-26
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Expires: 1994-01-02
Abstract
Abstract A firing pin igniter has a firing pin comprising three releasably connected parts. An upper part is manually shiftable to lift the middle and lower parts within a bore of the igniter housing. When predetermined movement of the middle and lower parts occurs, the lower part is released and is spring biased against a percussion cap. Subsequently, the upper part is released from the middle part with the middle part remaining in the housing bore to seal the bore from moisture. A sealing washer may be disposed in the bore to enhance the sealing effects.
Inventors
- 👤 Paul Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:53
CPC Classifications
F; F42; F42C; F42C7/00; F42C7/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
228 words
In a firing pin ignitor suitable for release by a pullcord, said ignitor including a housing having a bore, a percussionsensitive charge in said housing, and activating means for activating said charge while maintaining a moisture seal before and after activation of said charge; said activating means comprising: sealing means operable to seal said bore against moisture; spring means in said housing; a firing pin slidably disposed in said bore of said housing, said firing pin including: an outer part outwardly removable from said housing, an inner part including a portion arranged to displace said spring means in an energy-storing manner during outward movement of said firing pin to impart inward biasing force to said inner part, and a middle part; said middle part being releasably coupled to said inner part by first connecting means arranged to release said inner part for movement toward said charge after said spring means has been displaced during outward movement of said firing pin; said middle part being releasably coupled to said outer part by second connecting means arranged to release said middle part from said outer part subsequent to said release of said inner part and while said middle part and said sealing means are in sealing relationship relative to said bore, so that said middle part seals said bore subsequent to activation of said percussion-sensitive charge by said inner part.
Claim 2
Dependent Claim
228 words
In a firing pin ignitor suitable for release by a pullcord, said ignitor including a housing having a bore, a percussionsensitive charge in said housing, and activating means for activating said charge while maintaining a moisture seal before and after activation of said charge; said activating means comprising: sealing means operable to seal said bore against moisture; spring means in said housing; a firing pin slidably disposed in said bore of said housing, said firing pin including: an outer part outwardly removable from said housing, an inner part including a portion arranged to displace said spring means in an energy-storing manner during outward movement of said firing pin to impart inward biasing force to said inner part, and a middle part; said middle part being releasably coupled to said inner part by first connecting means arranged to release said inner part for movement toward said charge after said spring means has been displaced during outward movement of said firing pin; said middle part being releasably coupled to said outer part by second connecting means arranged to release said middle part from said outer part subsequent to said release of said inner part and while said middle part and said sealing means are in sealing relationship relative to said bore, so that said middle part seals said bore subsequent to activation of said percussion-sensitive charge by said inner part.
Claim 3
Dependent Claim
26 words
Apparatus as defined in claim 1 wherein the releasable connections between said outer and middle parts and between said middle and inner parts are slidable connections.
Claim 4
Dependent Claim
34 words
Apparatus as defined in claim 2 wherein the slidably releasable connection between said outer and middle parts comprises a hook-like extension of said outer part which seats within a recess of said middle part.
Claim 5
Dependent Claim
84 words
Apparatus as defined in claim 2 wherein the slidably releasable connection between said middle and inner parts comprises a plurality of connecting balls mounted partially in recess means of said middle part and partially in recess means of said inner part; said housing bore including escape groove means disposed for alignment with said connecting balls in response to said predetermined movement of said firing pin such that movement of said connecting balls into said escape groove releases said inner part from said middle part.
Claim 6
Dependent Claim
83 words
Apparatus according to claim 3 wherein the slidably releasable connection between said middle and inner parts comprises a plurality of connecting balls mounted partially in recess means of said middle part and partially in recess means of said inner part; said housing bore including escape groove means disposed for alignment with sAid connecting balls in response to said predetermined movement of said firing pin such that movement of said connecting balls into said escape groove releases said inner part from said middle part.
Claim 7
Dependent Claim
44 words
Apparatus as defined in claim 1 wherein said sealing means comprises a seal ring washer disposed in said housing remote from said spring; said seal washer being arranged in said bore to sealingly engage said middle part before and after activation of said charge.
Claim 8
Dependent Claim
45 words
Apparatus as defined in claim 3 wherein said sealing means comprises a seal ring washer disposed in said housing remote from said spring means; said seal washer being arranged in said bore to sealingly engage said middle part before and after activation of said charge.
Claim 9
Dependent Claim
32 words
Apparatus as defined in claim 6 wherein said housing comprises a head section and a neck section arranged for threaded engagement; said seal washing being clamped between said head and neck sections.
Claim 10
Dependent Claim
15 words
Apparatus as defined in claim 1 including a delay action composition for the firing mechanism.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |