Patent US3889463A successfully refreshed from Google Patents.
US3889463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stress relieving liner
Assignee: United States Department of the Navy
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Filing: 1974-06-27
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Granted: 1975-06-17
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Expires: 1994-06-27
Abstract
Abstract A stress relieving rocket motor liner is disclosed. The liner comprises an insulator layer joined to an inhibitor layer by means of columns extending through perforations in a release layer and a member polymer layer. The perforated memory polymer layer is outside of and adjacent to the release layer and inside of and adjacent to the insulator layer.
Inventors
- 👤 Miguel Anthony San
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:29
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/34; F02K9/346; Y; Y10; Y10S; Y10S60/00; Y10S60/909
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
In a stress relieving liner for a rocket motor comprising: an insulator layer adjacent to the motor casing and bonded thereto; a perforated release layer inside of the insulator layer; an inhibitor layer inside of and adjacent to the release layer and columns extending through the perforations in the perforated release layer bonding the insulator layer and inhibitor layer to one another; the improvement residing in a perforated layer of heat shrinkable material between and adjacent to the insulator layer and release layer; the perforations in said perforated layer of heat shrinkable material corresponding to the perforations in the perforated release layer so that the columns which bond the insulator layer and inhibitor layer together can extend through both the layer of heat shrinkable material and the release layer.
Claim 2
Dependent Claim
129 words
In a stress relieving liner for a rocket motor comprising: an insulator layer adjacent to the motor casing and bonded thereto; a perforated release layer inside of the insulator layer; an inhibitor layer inside of and adjacent to the release layer and columns extending through the perforations in the perforated release layer bonding the insulator layer and inhibitor layer to one another; the improvement residing in a perforated layer of heat shrinkable material between and adjacent to the insulator layer and release layer; the perforations in said perforated layer of heat shrinkable material corresponding to the perforations in the perforated release layer so that the columns which bond the insulator layer and inhibitor layer together can extend through both the layer of heat shrinkable material and the release layer.
Claim 3
Dependent Claim
32 words
In a stress relieving liner according to claim 1: the additional improvement residing in utilizing radiation cross-linked polyolefin as the material from which the perforated layer of heat shrinkable material is fabricated.
Claim 4
Dependent Claim
46 words
In a stress relieving liner according to claim 2: the additional improvement residing in utilizing a member selected from the group consisting of radiation cross-linked polyethylene, radiation cross-linked polypropylene, and combinations thereof as the material from which the perforated layer of heat shrinkable material is fabricated.
Claim 5
Dependent Claim
157 words
A stress relieving liner for a rocket motor comprising: an insulator layer adjacent to and bonded to the rocket mOtor casing; a first perforated release layer inside of and adjacent to the insulator layer; a perforated layer of heat shrinkable material inside of and adjacent to the first perforated release layer; a second perforated release layer inside of and adjacent to said perforated layer of heat shrinkable material; the perforations in said perforated layer of heat shrinkable material, corresponding to the perforations in the first perforated release layer; the perforations in said second perforated release layer corresponding to the perforations in said perforated layer of heat shrinkable material; an inhibitor layer inside of and adjacent to said second perforated layer and columns extending through the perforations in said first perforated release layer; said perforated layer of heat shrinkable material and said second perforated release layer to bond said insulator layer and said inhibitor layer to each other.
Claim 6
Dependent Claim
157 words
A stress relieving liner for a rocket motor comprising: an insulator layer adjacent to and bonded to the rocket mOtor casing; a first perforated release layer inside of and adjacent to the insulator layer; a perforated layer of heat shrinkable material inside of and adjacent to the first perforated release layer; a second perforated release layer inside of and adjacent to said perforated layer of heat shrinkable material; the perforations in said perforated layer of heat shrinkable material, corresponding to the perforations in the first perforated release layer; the perforations in said second perforated release layer corresponding to the perforations in said perforated layer of heat shrinkable material; an inhibitor layer inside of and adjacent to said second perforated layer and columns extending through the perforations in said first perforated release layer; said perforated layer of heat shrinkable material and said second perforated release layer to bond said insulator layer and said inhibitor layer to each other.
Claim 7
Dependent Claim
24 words
A stress relieving liner according to claim 4: wherein said perforated layer of heat shrinkable material is a perforated layer of radiation cross-linked polyolefin.
References Cited (Backward Citations)
US3056171A
Cited
US3673287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |