US3820814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge valve for an air bag
Assignee: Daimler Benz AG
•
Filing: 1972-04-03
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Granted: 1974-06-28
•
Expires: 1992-04-03
Abstract
Abstract A discharge valve for an air bag serving as passenger protective device in vehicles, especially in motor vehicles, which is automatically inflated by means of a gas when exceeding a predetermined vehicle deceleration and which is also adapted to be emptied with a certain delay by way of the discharge valve; the latter is provided in the walls of the air bag and includes a cup-shaped housing with a discharge aperture arranged within its bottom area; a cover is associated with the discharge aperture which is retained by elastic elements, such as, elastic bands at a spacing upstream of the discharge aperture in relation to the direction of the discharge flow; the cover is adapted to be displaced in the direction toward the discharge aperture as a function of the gas pressure within the air bag against the return force of the elastic elements so as to control the effective area of the discharge aperture as a function of the gas pressure prevailing on the inside of the air bag.
Inventors
- 👤 R Allgaier
- 👤 L Brambilla
- 👤 H Scholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:24
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/23; B60R21/239; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7866; Y10T137/7867
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
88 words
A discharge valve for a gas bag of the type serving as a passenger protective device in vehicles, which bag is automatically inflatable by means of a gas upon exceeding a predetermined vehicle deceleration and is adapted to be empited with delay by way of the discharge valve; said discharge valve comprising: discharge aperture means, and discharge aperture control means for controlling the free discharge cross section of said discharge aperture means such that said free discharge cross section decreases with an increasing pressure in said gas bag.
Claim 2
Dependent Claim
88 words
A discharge valve for a gas bag of the type serving as a passenger protective device in vehicles, which bag is automatically inflatable by means of a gas upon exceeding a predetermined vehicle deceleration and is adapted to be empited with delay by way of the discharge valve; said discharge valve comprising: discharge aperture means, and discharge aperture control means for controlling the free discharge cross section of said discharge aperture means such that said free discharge cross section decreases with an increasing pressure in said gas bag.
Claim 3
Dependent Claim
31 words
A discharge valve according to claim 1, wherein said air bag is fixedly connectpd to said discharge valve, and wherein said air bag is for protecting passengers in a motor vehicle.
Claim 4
Dependent Claim
50 words
A discharge valve according to claim 1, wherein said control means includes means assuring a continuously varying decrease in said free discharge cross section with a continuously increasing pressure in said gas bag, whereby varying size free discharge cross sections are provided over a range of internal gas bag pressures.
Claim 5
Dependent Claim
119 words
A discharge valve according to claim 41, wherein said discharge aperture means is arranged in the bottom of a substantially cupshaped housing of said discharge valve, and wherein said control means includes cover means and elastic retaining means for elastically retaining said cover means in position with respect to said discharge aperture means, wherein movement of said cover means with respect to said discharge aperture means effects changes in said free discharge cross section, and wherein said cover means is movable against the force of said elastic retaining means in a direction of decreasing free discharge cross section in response to increased pressure on a side of said cover means communicable directly with the pressure in said air bag.
Claim 6
Dependent Claim
42 words
A discharge valve according to claim 4, wherein said cover means is constructed such that it is movable in a direction toward said discharge aperture means to decrease said free discharge cross section while said elastic retaining means are continuously increasingly tensioned.
Claim 7
Dependent Claim
65 words
A discharge valve according to claim 5, wherein said cover means and said discharge aperture means have dimensions in a direction transverse to the direction of movement of said cover means that are smaller than the corresponding adjacent dimensions of said housing means such that said free discharge cross section is formed between peripheral edges of said cover means and walls of said housing means.
Claim 8
Dependent Claim
30 words
A discharge valve according to claim 4, characterized in that the air bag includes wall means and the discharge valve is provided in the wall means of the air bag.
Claim 9
Dependent Claim
27 words
A discharge valve according to claim 7, characterized in that the housing means protrudes from the bag in the direction of the discharge flow of the gases.
Claim 10
Dependent Claim
32 words
A discharge valve according to claim 8, characterized in that the inside of said housing means is constructed of substantially truncated, conical shape and tapers in the discharge direction of the gases.
Claim 11
Dependent Claim
26 words
A discharge valve according to claim 9, characterized in that the housing means is constituted by a bulge of the wall means of the air bag.
Claim 12
Dependent Claim
31 words
A discharge valve according to claim 9, characterized in that the housing means consists of a separately made fabric part which is connected with the wall means of the air bag.
Claim 13
Dependent Claim
35 words
A discharge valve according to claim 11, characterized in that the fabric part of the housing means is connected with the wall means of the air bag by any one of bonding, welding or sewing.
Claim 14
Dependent Claim
34 words
A discharge valve according to claim 9, characterized in that the cover means extends in the inflated and non-loaded condition of the air bag approximately in the edge plane of the cup-shaped housing means.
Claim 15
Dependent Claim
30 words
A discharge valve according to claim 9, characterized in that the cover means extends in the inflated and non-loaded condition of the air bag approximately in the wall plane thereof.
Claim 16
Dependent Claim
15 words
A discharge valve according to claim 9, characterized in that the cover means is flexible.
Claim 17
Dependent Claim
19 words
A discharge valve according to claim 15, characterized in that the cover means is constituted by a fabric part.
Claim 18
Dependent Claim
17 words
A discharge valve according to claim 10, characterized in that elastic bands are provided as retaining means.
Claim 19
Dependent Claim
19 words
A discharge valve according to claim 12, characterized in that the cover means is constituted by a fabric part.
Claim 20
Dependent Claim
27 words
A discharge valve according to claim 12, characterized in that at least three elastic bands are provided distributed substantially uniformly over the circumference of the cover means.
Claim 21
Dependent Claim
31 words
A discharge valve according to claim 14, characterized in that the elastic bands of the retaining means are disposed in their normal position substantially in a plane containing the cover means.
Claim 22
Dependent Claim
23 words
A discharge valve according to claim 14, characterized in that the cover means and the discharge aperture means are constructed of circular shape.
Claim 23
Dependent Claim
31 words
A discharge valve according to claim 16, characterized in that an annular area is provided between the cover means and the housing means adapted to be bridged by the retaining means.
Claim 24
Dependent Claim
50 words
A discharge valve according to claim 17, characterized in that the annular area between the cover means and the housing means is covered in the normal position of the retaining means by a closure ring disposed upstream of the retaining means in relation to the discharge direction of the gas.
Claim 25
Dependent Claim
19 words
A discharge valve according to claim 23, charActerized in that the closure ring is essentially immovable in its position.
Claim 26
Dependent Claim
18 words
A discharge valve according to claim 24, characterized in that the closure ring consists of essentially inelastic material.
Claim 27
Dependent Claim
23 words
A discharge valve according to claim 25, characterized in that the closure ring is connected with the wall means of the air bag.
Claim 28
Dependent Claim
27 words
A discharge valve according to claim 26, characterized in that a gas outlet opening is provided in the air bag means in addition to the discharge valve.
Claim 29
Dependent Claim
26 words
A discharge valve according to claim 7, characterized in that the housing means is constituted by a bulge of the wall means of the air bag.
Claim 30
Dependent Claim
29 words
A discharge valve according to claim 42, characterized in that the housing means is constructed of substantially truncated, conical shape and tapers in the discharge direction of the gases.
Claim 31
Dependent Claim
31 words
A discharge valve according to claim 7, characterized in that the housing means consists of a separately made fabric part which is connected with the wall means of the air bag.
Claim 32
Dependent Claim
35 words
A discharge valve according to claim 30, characterized in that the fabric part of the housing means is connected with the wall means of the air bag by any one of bonding, welding or sewing.
Claim 33
Dependent Claim
34 words
A discharge valve according to claim 4, characterized in that the cover means extends in the inflated and non-loaded condition of the air bag approximately in the edge plane of the cup-shaped housing means.
Claim 34
Dependent Claim
30 words
A discharge valve according to claim 4, characterized in that the cover means extends in the inflated and non-loaded condition of the air bag approximately in the wall plane thereof.
Claim 35
Dependent Claim
15 words
A discharge valve according to claim 4, characterized in that the cover means is flexible.
Claim 36
Dependent Claim
19 words
A discharge valve according to claim 34, characterized in that the cover means is constituted by a fabric part.
Claim 37
Dependent Claim
17 words
A discharge valve according to claim 4, characterized in that elastic bands are provided as retaining means.
Claim 38
Dependent Claim
27 words
A discharge valve according to claim 36, characterized in that at least three elastic bands are provided distributed substantially uniformly over the circumference of the cover means.
Claim 39
Dependent Claim
31 words
A discharge valve according to claim 36, characterized in that the elastic bands of the retaining means are disposed in their normal position substantially in a plane containing the cover means.
Claim 40
Dependent Claim
23 words
A discharge valve according to claim 4, characterized in that the cover means and the discharge aperture means are constructed of circular shape.
Claim 41
Dependent Claim
31 words
A discharge valve according to claim 4, characterized in that an annular area is provided between the cover means and the housing means adapted to be bridged by the retaining means.
Claim 42
Dependent Claim
50 words
A discharge valve according to claim 40, characterized in that the annular area between the cover means and the housing means is covered in the normal position of the retaining means by a closure ring disposed upstream of the retaining means in relation to the discharge direction of the gas.
Claim 43
Dependent Claim
19 words
A discharge valve according to claim 41, characterized in that the closure ring is essentially immovable in its position.
Claim 44
Dependent Claim
18 words
A discharge valve according to claim 41, characterized in that the closure ring consists of essentially inelastic material.
Claim 45
Dependent Claim
22 words
A discharge valve according to claim 41, characterized in that the closure ring is connected with wall means of the air bag.
Claim 46
Dependent Claim
27 words
A discharge valve according to claim 4, characterized in that a gas outlet opening is provided in the air bag means in addition to the discharge valve.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |