US3576231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable air pad with easily removable diaphragm
Assignee: Doosan Bobcat North America Inc
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Filing: 1969-09-12
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Granted: 1971-04-27
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Expires: 1989-09-12
Abstract
Abstract An air pad with an easily removable diaphragm. The diaphragm has a bead around the periphery adapted to be disposed in a recess formed by an L-shaped flange and held in place by a snap ring.
Inventors
- 👤 Richard R Jung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:56
CPC Classifications
B; B60; B60V; B60V3/00; B60V3/02; B60V3/025
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
104 words
An inflatable air pad comprising a base, a flange connected to the said base, the said flange being generally L-shaped in cross section, a recess defined by the said base and flange, a flexible diaphragm, the said diaphragm including a bead which is adapted to be disposed in the said recess so as to form a chamber between the said base and diaphragm, a snapring adapted to be disposed in the said recess and hold the said bead in the said recess and means for connecting the said diaphragm to the said base at substantially the centers of both the said diaphragm and base.
Claim 2
Dependent Claim
104 words
An inflatable air pad comprising a base, a flange connected to the said base, the said flange being generally L-shaped in cross section, a recess defined by the said base and flange, a flexible diaphragm, the said diaphragm including a bead which is adapted to be disposed in the said recess so as to form a chamber between the said base and diaphragm, a snapring adapted to be disposed in the said recess and hold the said bead in the said recess and means for connecting the said diaphragm to the said base at substantially the centers of both the said diaphragm and base.
Claim 3
Dependent Claim
34 words
An air pad as set forth in claim 1 wherein the said flange includes an inwardly extending portion and a notch in the said inwardly extending portion to facilitate removal of the said snapring.
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |