US3216320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for excavating by means of explosives
Assignee: Harvey Aluminum Inc
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Filing: 1962-07-09
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Granted: 1965-11-09
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Expires: 1982-07-09
Abstract
No abstract record available.
Inventors
- 👤 Harold E Thomas
- 👤 Jr Frank Vyzralek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:53
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/007; F; F42; F42C; F42C15/00; F42C15/18; F42D; F42D3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
218 words
AN APPARATUS FOR EXCAVATING MATERIAL AND INCLUDING: (A) A STANDARD DISPOSED ON AN AXIS NORMAL TO AND FOR SUPPORTING ENGAGEMENT UPON THE SURFACE OF THE MATERIAL TO BE EXCAVATED, (B) A SHAPED-CHARGE OF EXPLOSIVE SUPPORTED BY THE STANDARD ON SAID AXIS TO FORM A BORE IN SAID MATERIAL AND HAVING A DETONATOR TO BE SET OFF BY PRECUSSION, (C) A SAFETY MEANS COMPRISING A CARRIER SHIFTABLY SUPPORTING THE DETONATOR TO MOVE IT FROM AN UNARMED OFFSET POSITION TO AN ARMED POSITION ALIGNED WITH SAID AXIS, (D) A SECOND EXPLOSIVE CHARGE RELEASABLY CARRIED BY THE STANDARD ON SAID AXIS AND HAVING A HEAD MOVABLE INTO ENGAGEMENT WITH THE DETONATOR OF THE SHAPEDCHARGE TO DETONATE IT, (E) A ROCKET PROPELLANT CHARGE TO THRUST SAID EXPLOSIVE CHARGE INTO THE DETONATOR OF THE SHAPED-CHARGE AND INTO THE BORE, (F) AND MEANS TO DETONATE SAID SECOND EXPLOSIVE CHARGE AND COMPRISING A FUSE CARRYING BODY, A SEAR NORMALLY ENGAGING SAID FUSE CARRYING BODY, A SEAR NORMALLY TUATOR ADAPTED TO RELEASE THE SEAR FROM THE FUSE CARRYING BODY, SAID ACTUATOR HAVING AT LEAST ONE RADIALLY PROJECTING ELEMENT ENGAGEABLE WITH THE SIDE WALLS OF THE BORE TO ROTATE THE ACTUATOR AND DETONATE THE FUSE, WHEREBY SAID SECOND CHARGE IS SET OFF AT A PREDETERMINED DEPTH WITHIN SAID BORE AND SAID MATERIAL IS LOOSENED FORMING A CAVITY.
Claim 2
Independent Claim
218 words
AN APPARATUS FOR EXCAVATING MATERIAL AND INCLUDING: (A) A STANDARD DISPOSED ON AN AXIS NORMAL TO AND FOR SUPPORTING ENGAGEMENT UPON THE SURFACE OF THE MATERIAL TO BE EXCAVATED, (B) A SHAPED-CHARGE OF EXPLOSIVE SUPPORTED BY THE STANDARD ON SAID AXIS TO FORM A BORE IN SAID MATERIAL AND HAVING A DETONATOR TO BE SET OFF BY PRECUSSION, (C) A SAFETY MEANS COMPRISING A CARRIER SHIFTABLY SUPPORTING THE DETONATOR TO MOVE IT FROM AN UNARMED OFFSET POSITION TO AN ARMED POSITION ALIGNED WITH SAID AXIS, (D) A SECOND EXPLOSIVE CHARGE RELEASABLY CARRIED BY THE STANDARD ON SAID AXIS AND HAVING A HEAD MOVABLE INTO ENGAGEMENT WITH THE DETONATOR OF THE SHAPEDCHARGE TO DETONATE IT, (E) A ROCKET PROPELLANT CHARGE TO THRUST SAID EXPLOSIVE CHARGE INTO THE DETONATOR OF THE SHAPED-CHARGE AND INTO THE BORE, (F) AND MEANS TO DETONATE SAID SECOND EXPLOSIVE CHARGE AND COMPRISING A FUSE CARRYING BODY, A SEAR NORMALLY ENGAGING SAID FUSE CARRYING BODY, A SEAR NORMALLY TUATOR ADAPTED TO RELEASE THE SEAR FROM THE FUSE CARRYING BODY, SAID ACTUATOR HAVING AT LEAST ONE RADIALLY PROJECTING ELEMENT ENGAGEABLE WITH THE SIDE WALLS OF THE BORE TO ROTATE THE ACTUATOR AND DETONATE THE FUSE, WHEREBY SAID SECOND CHARGE IS SET OFF AT A PREDETERMINED DEPTH WITHIN SAID BORE AND SAID MATERIAL IS LOOSENED FORMING A CAVITY.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |