US3967704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle decelerating means
Assignee: British Industrial Plastics Ltd
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Filing: 1971-12-14
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Granted: 1976-07-06
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Expires: 1991-12-14
Abstract
Abstract This invention provides a safety device for quickly arresting the movement of vehicles such as aeroplanes and motor cars by forming a retarding bed of crushable material adjacent to a vehicle track. A foam is formed from an aminoplast resin composition and layed down in a bed adjacent to the vehicle track where it is cured in situ to produce a non-resilient cured foam body having a compressive strength between 15 and 50 p.s.i. and a density from 0.25 to 10 pounds per cubic foot.
Inventors
- 👤 Dennis Henry Ogden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:51
CPC Classifications
E; E01; E01F; E01F13/00; E01F13/12; B; B64; B64F; B64F1/00; B64F1/02; B64F1/025; E01C; E01C9/00; E01C9/007; Y; Y10; Y10S; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
70 words
A method of forming a retarding bed of crushable material adjacent to a vehicle track comprising the steps of forming a foam from an aminoplast resin composition, laying down said foam adjacent to the vehicle track and curing the foam in situ to produce a non-resilient, cured foam body having a compressive strength between 15 and 50 p.s.i. and a density of from 0.25 to 10 lb. per cu. f.t.
Claim 2
Independent Claim
70 words
A method of forming a retarding bed of crushable material adjacent to a vehicle track comprising the steps of forming a foam from an aminoplast resin composition, laying down said foam adjacent to the vehicle track and curing the foam in situ to produce a non-resilient, cured foam body having a compressive strength between 15 and 50 p.s.i. and a density of from 0.25 to 10 lb. per cu. f.t.
Claim 3
Dependent Claim
28 words
A method of forming a retarding bed according to claim 1 wherein the density of the cured foam body is from 0.25 to 5 lb. per cu. ft.
Claim 4
Dependent Claim
34 words
A method of forming a retarding bed according to claim 1 wherein the foam is layed so that the thickness of the cured foam body increases in the direction away from the vehicle track.
Claim 5
Dependent Claim
29 words
A method of forming a retarding bed according to claim 3 wherein a protective covering is applied to the foam body to protect it against external attack and weathering.
Claim 6
Dependent Claim
21 words
A method of forming a retarding bed according to claim 3 wherein the foam is prepared from a urea/formaldehyde resin composition.
Claim 7
Dependent Claim
35 words
A method of forming a retarding bed according to claim 1 wherein the foam is layed so that the compressive strength and density of the aminoplast foam varies in different parts of the foam body.
Claim 8
Dependent Claim
29 words
A method of forming a retarding bed according to claim 6 wherein a protective covering is applied to the foam body to protect it against external attack and weathering.
Claim 9
Dependent Claim
21 words
A method of forming a retarding bed according to claim 6 wherein the foam is prepared from a urea/formaldehyde resin composition.
Claim 10
Dependent Claim
29 words
A method of forming a retarding bed according to claim 1 wherein a protective covering is applied to the foam body to protect it against external attack and weathering.
Claim 11
Dependent Claim
21 words
A method of forming a retarding bed according to claim 1 wherein the foam is prepared from a urea/formaldehyde resin composition.
Claim 12
Dependent Claim
21 words
A method of forming a retarding bed according to claim 10 wherein a flame retardent additive is incorporated into the foam.
Claim 13
Dependent Claim
21 words
A method of forming a retarding bed according to claim 1 wherein a flame retardent additive is incorporated into the foam.
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) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |