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Patent US3672354A successfully refreshed from Google Patents.
US3672354A
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Rest-inducing device
Assignee: Hamilton Beach Inc
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Filing: 1970-09-04
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Granted: 1972-06-27
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Expires: 1990-09-04
Abstract
Abstract Air pump gives a pulse cycle at human heartbeat frequency to air mattress to simulate the prenatal womb experience to an infant supported thereon.
Inventors
- 👤 Robert L Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:15
CPC Classifications
A; A47; A47D; A47D15/00; A47D15/001; A61; A61H; A61H1/00; A61H1/001; A61M; A61M21/00; F; F04; F04B; F04B39/00; F04B39/0005; F04B39/0016; A61H2201/00; A61H2201/50; A61H2201/5007; A61H2203/00; A61H2203/04; A61H2203/0443; A61H2203/0456; A61M2021/0005; A61M2021/0022
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
A rest-inducing device primarily for infants comprising: a. a single-stroke reciprocating air pump having a cycle frequency comparable to that of the human heart and having means modifying the pressure stroke output of the pump to induce a pair of pulses during each pressure stroke; b. an air mattress having a filling port; and c. means connecting the output of the pump and the filling port of the air mattress whereby the mattress imparts to a body resting thereon a throbbing movement comparable to that of a mother''s womb.
Claim 2
Dependent Claim
89 words
A rest-inducing device primarily for infants comprising: a. a single-stroke reciprocating air pump having a cycle frequency comparable to that of the human heart and having means modifying the pressure stroke output of the pump to induce a pair of pulses during each pressure stroke; b. an air mattress having a filling port; and c. means connecting the output of the pump and the filling port of the air mattress whereby the mattress imparts to a body resting thereon a throbbing movement comparable to that of a mother''s womb.
Claim 3
Dependent Claim
70 words
A rest-inducing device as described in claim 2 wherein the means for modifying the pressure stroke output comprises a vent in the wall of the pump cylinder, the piston having a passage from its working face down to an opening in its side, the vent being covered by the piston at all times except when the opening aligns with the vent intermediate the ends of the stroke of the piston.
Claim 4
Dependent Claim
33 words
A rest-inducing device as described in claim 2 wherein the pump is equipped with an outlet-oriented check valve permitting passage of air out of the pump outlet, but not in the reverse direction.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |