US5101730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ring pellets for gas generators
Assignee: Dynamit Nobel AG
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Filing: 1990-07-13
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Granted: 1992-04-07
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Expires: 2010-07-13
Abstract
Abstract Ring pellets for gas generators exhibit optimum reaction rates by having configurations which optimize such rates. The pellet has a central ignition duct; from the latter, outlet channels extend radially toward a rim of the pellet. Specific embodiments contain, on the topside and underside of the pellets, either conical recesses or annular channels or both. The pellets preferably exhibit a proportion of surface area/unit weight of from 4 to 7 cm 2 /g, which can be set by variation of the channels and, respectively, of the recesses to obtain a desired value. The higher this value, the greater the reaction rate. The ring pellets are especially well suited for airbag generators which must display differently high reaction rates on the driver's side and on the front-seat passenger's side, and which are to exhibit at the same time a high breaking and abrasion stability.
Inventors
- 👤 Richard Bender
- 👤 Gerrit Scheiderer
- 👤 Hans Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:02
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/26; B60R21/264; B60R21/2644; F; F42; F42B; F42B5/00; F42B5/02; F42B5/16
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
47 words
A ring pellet for gas generators formed of a gas-releasing material, said pellet having a central, axially symmetrical channel extending therethrough and outlet channels on the topside and/or underside of the pellet extending radially from the central channel to an outer rim or periphery of the pellet.
Claim 2
Dependent Claim
47 words
A ring pellet for gas generators formed of a gas-releasing material, said pellet having a central, axially symmetrical channel extending therethrough and outlet channels on the topside and/or underside of the pellet extending radially from the central channel to an outer rim or periphery of the pellet.
Claim 3
Dependent Claim
18 words
A ring pellet according to claim 1, wherein the outlet channels are arranged symmetrically to the central channel.
Claim 4
Dependent Claim
22 words
A ring pellet according to claim 1, wherein the pellet has on the topside and underside the same number of outlet channels.
Claim 5
Dependent Claim
22 words
A ring pellet according to claim 2, wherein the pellet has on the topside and underside the same number of outlet channels.
Claim 6
Dependent Claim
32 words
A ring pellet according to claim 1, wherein the outlet channels on the topside of the pellets are arranged offset with respect to the outlet channels on the underside of the pellet.
Claim 7
Dependent Claim
32 words
A ring pellet according to claim 2, wherein the outlet channels on the topside of the pellets are arranged offset with respect to the outlet channels on the underside of the pellet.
Claim 8
Dependent Claim
26 words
A ring pellet according to claim 1, wherein the outlet channels each have a depth corresponding maximally to one-third of the total height of the pellet.
Claim 9
Dependent Claim
26 words
A ring pellet according to claim 2, wherein the outlet channels each have a depth corresponding maximally to one-third of the total height of the pellet.
Claim 10
Dependent Claim
43 words
A ring pellet according to claim 1, wherein the central channel includes conical recesses arranged axially symmetrically and surrounding a central duct extending through the pellet in the topside and the underside of the pellet, respectively, the outlet channels terminating in said recesses.
Claim 11
Dependent Claim
43 words
A ring pellet according to claim 2, wherein the central channel includes conical recesses arranged axially symmetrically and surrounding a central duct extending through the pellet in the topside and the underside of the pellet, respectively, the outlet channels terminating in said recesses.
Claim 12
Dependent Claim
25 words
A ring pellet according to claim 9, characterized in that the pellet has a surface area/weight ratio ranging from 3 to 7 cm 2 /g.
Claim 13
Dependent Claim
25 words
A ring pellet according to claim 10, characterized in that the pellet has a surface area/weight ratio ranging from 3 to 7 cm 2 /g.
Claim 14
Dependent Claim
27 words
A ring pellet according to claim 1, wherein the pellet has a centrally symmetrical annular channel arranged between the central channel and the rim of the pellet.
Claim 15
Dependent Claim
27 words
A ring pellet according to claim 2, wherein the pellet has a centrally symmetrical annular channel arranged between the central channel and the rim of the pellet.
Claim 16
Dependent Claim
23 words
A ring pellet according to claim 13, wherein the pellet has a surface area/weight ratio ranging from 4 to 8 cm 2 /g.
Claim 17
Dependent Claim
27 words
A ring pellet according to claim 9, wherein the pellet has a centrally symmetrical annular channel arranged between the central channel and the rim of the pellet.
Claim 18
Dependent Claim
27 words
A ring pellet according to claim 10, wherein the pellet has a centrally symmetrical annular channel arranged between the central channel and the rim of the pellet.
References Cited (Backward Citations)
US677528A
Cited
US3175497A
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US3492815A
Cited
US3756025A
Cited
US4817828A
Cited
US4846368A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-04-07 | 1995-10-07 | 1996-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-07 | 1999-10-07 | 2000-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-07 | 2003-10-07 | 2004-04-07 | $7700.00 | Window Closed / Lapsed |