Patent US3756025A successfully refreshed from Google Patents.
US3756025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handling means for slot formers
Assignee: ATK Launch Systems LLC
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Filing: 1971-07-14
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Granted: 1973-09-04
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Expires: 1991-07-14
Abstract
Abstract In slot formers for solid propellant rocket grains, of the type wherein a disk of propellant is equipped with ribs on one side to provide a radially extending slot between forward and aft components of a solid propellant rocket grain, a rigid reinforcing frame embedded in the propellant disk is provided with loops that extend beyond the surface of the disk to serve as handling means therefore.
Inventors
- 👤 Cullough E Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:08
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
102 words
In a rocket motor having a case, a forward propellant grain component in the case, an aft propellant grain component, and a slot former interposed between the forward and aft grains made of propellant and having spacers on one side thereof to create a radially extending slot between the forward and aft grain components, the improvement comprising: a reinforcing frame embedded in the slot former and having loops integral therewith that extend beyond the surface of the slot former propellant to facilitate handling of the slot former, the frame being made of rigid tubes filled with solid propellant to promote consumability thereof.
Claim 2
Dependent Claim
102 words
In a rocket motor having a case, a forward propellant grain component in the case, an aft propellant grain component, and a slot former interposed between the forward and aft grains made of propellant and having spacers on one side thereof to create a radially extending slot between the forward and aft grain components, the improvement comprising: a reinforcing frame embedded in the slot former and having loops integral therewith that extend beyond the surface of the slot former propellant to facilitate handling of the slot former, the frame being made of rigid tubes filled with solid propellant to promote consumability thereof.
Claim 3
Dependent Claim
19 words
The rocket motor of claim 1 wherein the rigid tubes are made of fiber-glass impregnated with a cured resin.
Claim 4
Dependent Claim
46 words
A reinforcing frame for a solid propellant slot former comprising a substantially planar system of interconnected rods made of rigid tubes, comprising fiber glass impregnated with a cured resin, filled with solid propellant; and loops connected thereto, extending substantially perpendicular to the plane of the frame.
Claim 5
Dependent Claim
46 words
A reinforcing frame for a solid propellant slot former comprising a substantially planar system of interconnected rods made of rigid tubes, comprising fiber glass impregnated with a cured resin, filled with solid propellant; and loops connected thereto, extending substantially perpendicular to the plane of the frame.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |