Patent US3754496A successfully refreshed from Google Patents.
US3754496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosive bolt
Assignee: United States Department of the Navy
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Filing: 1971-08-20
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Granted: 1973-08-28
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Expires: 1991-08-20
Abstract
Abstract An explosive bolt which is initiated in response to a predetermined hydrostatic pressure including a percussion sensitive bolt filled with explosive having a hydrostatic pressure responsive detonator attached thereto. The detonator includes a plunger having a firing pin attached thereto, the plunger normally being constrained in a retaining sleeve by a ball detent. A piston is slidably positioned over the retaining sleeve and prevents the detent from releasing the plunger until the piston has moved under sufficient hydrostatic pressure. A spring is provided between the plunger and the piston which becomes compressed as the piston moves under pressure thereby providing a forward biasing to the plunger.
Inventors
- 👤 E Noel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:17
CPC Classifications
F; F42; F42C; F42C5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
Apparatus for separably joining a pair of assemblies comprising: an explosively filled bolt having a head portion at one end thereof; a percussion cap attached adjacent said head portion; a plunger normally fixed in spaced relationship to said percussion cap for detonating said explosively filled bolt; a hydrostatic pressure responsive ball locking mechanism including: a cylindrical retaining sleeve connected to said bolt for receiving said plunger and having at least one hole formed radially therethrough; a balL positioned within said at least one hole formed in said retaining sleeve an annular groove formed in said plunger normally cooperating with said ball; a piston member slidably disposed over said retaining sleeve having a head portion communicable with the external environment, and having a reduced inner diameter portion normally overlying and retain said ball in said groove and an enlarged inner diameter portion axially contiguous with said reduced inner diameter portion; and a compression spring positioned between said piston member and said plunger; whereby a predetermined hydrostatic pressure forces said piston to move inwardly, overcoming the force of said spring and causing said enlarged inner diameter to overlie and thereby release said ball from said annular groove whereupon said plunger impacts said percussion cap.
Claim 2
Dependent Claim
202 words
Apparatus for separably joining a pair of assemblies comprising: an explosively filled bolt having a head portion at one end thereof; a percussion cap attached adjacent said head portion; a plunger normally fixed in spaced relationship to said percussion cap for detonating said explosively filled bolt; a hydrostatic pressure responsive ball locking mechanism including: a cylindrical retaining sleeve connected to said bolt for receiving said plunger and having at least one hole formed radially therethrough; a balL positioned within said at least one hole formed in said retaining sleeve an annular groove formed in said plunger normally cooperating with said ball; a piston member slidably disposed over said retaining sleeve having a head portion communicable with the external environment, and having a reduced inner diameter portion normally overlying and retain said ball in said groove and an enlarged inner diameter portion axially contiguous with said reduced inner diameter portion; and a compression spring positioned between said piston member and said plunger; whereby a predetermined hydrostatic pressure forces said piston to move inwardly, overcoming the force of said spring and causing said enlarged inner diameter to overlie and thereby release said ball from said annular groove whereupon said plunger impacts said percussion cap.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |