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Patent US3752526A successfully refreshed from Google Patents.
US3752526A
Expired / Lapsed
US
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Vehicle bed
Assignee: Burgt Gerrit V D
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Filing: 1971-06-15
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Granted: 1973-08-14
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Expires: 1991-06-15
Abstract
Abstract A vehicle bed comprises a platform for carrying a lying person, e.g. a patient, a maximum shock insulation being contemplated, which is obtained by a mass-spring system for the platform having a very low natural frequency of approximately 0.5 Hz, the platform being fixed against horizontal displacement by fixing means which act in the centre of gravity of the carrier platform loaded with a person.
Inventors
- 👤 Der Burgt G Van
- 👤 J Hart
- 👤 J Schrier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:49
CPC Classifications
A; A61; A61G; A61G3/00; A61G3/006
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
A bed for use in a vehicle comprising: platform means for carrying a person in a reclining position, horizontal retaining means for preventing substantial movement of said platform in a horizontal direction and attached to said platform in such a manner as to be acting thereon substantially at the level of the center of gravity of said platform loaded with a person, adjustable spring means for resiliently supporting said platform in a substantially horizontal position in such a manner that the natural frequency of vibration of said platform while loaded and said spring means is less than the lowest natural frequency of a vehicle upon which it is mounted, and which spring means may be independently adjusted so as to functionally dispose said platform while loaded, in an inclined position.
Claim 2
Dependent Claim
130 words
A bed for use in a vehicle comprising: platform means for carrying a person in a reclining position, horizontal retaining means for preventing substantial movement of said platform in a horizontal direction and attached to said platform in such a manner as to be acting thereon substantially at the level of the center of gravity of said platform loaded with a person, adjustable spring means for resiliently supporting said platform in a substantially horizontal position in such a manner that the natural frequency of vibration of said platform while loaded and said spring means is less than the lowest natural frequency of a vehicle upon which it is mounted, and which spring means may be independently adjusted so as to functionally dispose said platform while loaded, in an inclined position.
Claim 3
Dependent Claim
38 words
A vehicle bed according to claim 1, characterized in that the retaining means are formed by a linkage system extending substantially in the horizontal plane through the centre of gravity of the carrier platform loaded with a person.
Claim 4
Dependent Claim
50 words
A vehicle bed according to claim 1, characterized in that the retaining means are formed by guide means secured to the platform and extending substantially in the horizontal plane through the centre of gravity of the platform when loaded with a person, said guide means being guided along vertical guideways.
Claim 5
Dependent Claim
11 words
A bed as defined in claim 1 attached to a vehicle.
Claim 6
Dependent Claim
44 words
A vehicle bed according to claim 1, characterized in that the natural frequency of the mass-spring system, the mass being formed by the platform loaded with a person and the spring system by said adjustable vertical spring means is in the order of 0.5Hz.
Claim 7
Dependent Claim
37 words
A vehicle bed according to claim 1 characterized in that the spring means includes a set of levers which each act with a horizontal arm on the platform and with an arm shorter than said horizontal arm.
Claim 8
Dependent Claim
30 words
A vehicle bed according to claim 6, characterized in that the horizontal arms of the set of levers act on profiles of the carrier platform by means of profiled rollers.
Claim 9
Dependent Claim
46 words
A vehicle bEd according to claim 1, characterized by mounting means for attaching thereto the spring means along the wall of a vehicle and by levers whose horizontal arms each have a free end in the form of a bracket, extending transversely to the vehicle wall.
Claim 10
Dependent Claim
21 words
A vehicle bed according to claim 7, characterized in that the free end of each horizontal arm carries the profiled rollers.
Claim 11
Dependent Claim
39 words
A vehicle bed according to claim 8, characterized in that the free ends of the horizontal arms of the levers are slewable about a longitudinal axis of the vehicle between a vertical rest position and a horizontal operating position.
Claim 12
Dependent Claim
37 words
A vehicle bed according to claim 1, characterized in that the effective spring rigidity acting on the carrier platform is adjustable so as to adapt same to the weight of a person lying on the carrier platform.
References Cited (Backward Citations)
US2324685A
Cited
GB859982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |