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US3653084A Expired / Lapsed US ⏱️ 0.0 years remaining

Inflatable structure

Assignee: MICHAEL G HARTMAN
•
Filing: 1970-04-02
•
Granted: 1972-04-04
•
Expires: 1990-04-02
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Abstract

Abstract An inflatable structure and method of making it. The structure comprises a knitted fabric body shell, which has been impregnated with a curable elastomeric material, which material forms an outer surface coating in the structure. The fabric body shell is made up of a knitted fabric, and before impregnation is manufactured to have a shape, were the shell in an inflated condition, roughly corresponding to the shape of the finished article or structure. An inflatable, flexible-walled bladder, having substantially the same shape when inflated, is provided within the body shell to enable shaping of the body shell through inflation of the bladder. With the body shell shaped by inflation of this bladder, the elastomeric material is applied, as by spraying or brushing, to impregnate the body shell and to form a protective covering about the outside of the body shell covering any seams, etc. The bladder may remain in the structure on its completion, and for this purpose may have an elastomeric coating applied about its outer surface which cures to form a rubber-like coating on the inside of the fabric body shell.

Inventors

  • 👤 Michael G Hartman

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 06:23
CPC Classifications
B; B63; B63B; B63B7/00; B63B7/06; B63B7/08

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 61 words
The method of claim 1, wherein the body shell is prepared about the bladder by placing a knitted piece on the bladder and joining end margins of such piece to have the piece extend continuously about the bladder, and the coating composition is applied over such end margins where they are joined to form a coating over such location of joinder.
Claim 2
Dependent Claim 59 words
The method of claim 1, wherein an elastomeric layer is prepared about the outside of said bladder prior to preparing said fabric body shell about the bladder, and the curable coating composition is applied with such permeating the fabric body shell and on curing bonding to said elastomeric layer where the coating composition has permeated through the body shell.
Claim 3
Dependent Claim 23 words
The method of claim 1 wherein the bladder has flexible walls of limited stretchability whereby on inflation it assumes a predetermined inflated size.

References Cited (Backward Citations)

US1297408A Cited
US1842652A Cited
US2788804A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-04-04 1975-10-04 1976-04-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-04-04 1979-10-04 1980-04-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-04-04 1983-10-04 1984-04-04 $7700.00 Window Closed / Lapsed

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