US4389264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of insulated propellant sets and of propelling sets provided with an insulating envelope
Assignee: Gechem SA
•
Filing: 1981-02-17
•
Granted: 1983-06-21
•
Expires: 2001-02-17
Abstract
Abstract Process for the manufacture of insulated propellant sets for base-bleed gas generators, said propellant set consisting of a propellant containing one or more solid substances, at least one of which is an oxidant, and a binder being a thermoplastically deformable elastomer, characterized thereby that the propellant is introduced into an insulating envelope, which as an essential component contains a thermoplastically deformable elastomer suited for the binder, and is forced into the envelope at increased temperature.
Inventors
- 👤 Wolfgang H. R. Klohn
- 👤 Dieter H. Muller
- 👤 Hiltmar A. O. Schubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:41
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0008; F; F02; F02K; F02K9/00; F02K9/08; F02K9/24
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
Process for the manufacture of insulated propellant sets for base-bleed gas generators comprising introducing a propellant containing one or more solid substances, at least one of which is an oxidant, and a binder comprising a thermoplastically deformable elastomer, into an insulating envelope, which contains a thermoplastically deformable elastomer, and forcing said propellant into the envelope at elevated temperature.
Claim 2
Dependent Claim
58 words
Process for the manufacture of insulated propellant sets for base-bleed gas generators comprising introducing a propellant containing one or more solid substances, at least one of which is an oxidant, and a binder comprising a thermoplastically deformable elastomer, into an insulating envelope, which contains a thermoplastically deformable elastomer, and forcing said propellant into the envelope at elevated temperature.
Claim 3
Dependent Claim
20 words
Process according to claim 1, wherein the propellant is fed into the insulating envelope in the form of a granulate.
Claim 4
Dependent Claim
22 words
Process according to claim 1, wherein the propellant is placed into the insulating envelope in the form of a preformed propellant set.
Claim 5
Dependent Claim
20 words
Process according to claims 1, 2 or 3, wherein heating at 100° to 140° C. occurs at least during compression.
Claim 6
Dependent Claim
11 words
Process according to claim 4, wherein compression occurs at 120° C.
Claim 7
Dependent Claim
31 words
Process according to claims 1, 2 or 3, wherein the step of forcing in the propellant into the insulating envelope is carried out at a pressure of 10 to 50 MPa.
Claim 8
Dependent Claim
17 words
Process according to claim 6, wherein the propellant is forced into the insulating envelope at 20 MPa.
Claim 9
Dependent Claim
68 words
Propellant set for base-bleed gas generators provided with an insulating envelope, said propellant set consisting of a propellant containing a binder and one or more solid substances, at least one of them being an oxidant, wherein the binder consists of a thermoplastically deformable elastomer, said insulating envelope containing a thermoplastically deformable elastomer, such that the binder of the propellant set and the insulating envelope are closely bonded together.
Claim 10
Dependent Claim
68 words
Propellant set for base-bleed gas generators provided with an insulating envelope, said propellant set consisting of a propellant containing a binder and one or more solid substances, at least one of them being an oxidant, wherein the binder consists of a thermoplastically deformable elastomer, said insulating envelope containing a thermoplastically deformable elastomer, such that the binder of the propellant set and the insulating envelope are closely bonded together.
Claim 11
Dependent Claim
16 words
Propellant set according to claim 8, wherein the thermoplastically deformable elastomer is an orderly three-block elastomer.
Claim 12
Dependent Claim
24 words
Propellant set according to claim 9, wherein that the three-block elastomer is an orderly copolymer of butadiene and styrene or of isoprene and styrene.
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) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |