US4196483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable mattress support
Assignee: Individual
•
Filing: 1978-07-19
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Granted: 1980-04-08
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Expires: 1998-07-19
Abstract
Abstract A portable mattress support adapted to be readily installed and removed from a confined space and especially in a tractor cab sleeping quarter area, whereby the support permits the absorption of various forces without imparting the same to the user.
Inventors
- 👤 Robert J. Lefler
- 👤 George H. Kahl, Jr.
- 👤 Thomas E. Waldrop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:02
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/24; B60N2/32; B60N2/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
153 words
A mattress support comprising a generally rectangular elongated base frame and an auxiliary frame disposed one above the other in substantial alignment, means positioned between said auxiliary frame and said base frame at the ends thereof maintaining the auxiliary frame thereabove, said means including a fluid cylinder means, a supply of fluid therefor, valve control means connected to said supply and said cylinder means for automatically controlling the movement of fluid therein and thereout, intersecting lever means pivotally disposed between said frames adjacent to said cylinder means with the lower portion of each of the lever means being provided with a roller movable in a track member positioned on said base frame, said lever means being transversely positioned with respect to the longitudinal axis of the frames, and weight responsive means positioned between said auxiliary frame and said control means regulating said valve means upon the placement of weight on said auxiliary frame.
Claim 2
Dependent Claim
153 words
A mattress support comprising a generally rectangular elongated base frame and an auxiliary frame disposed one above the other in substantial alignment, means positioned between said auxiliary frame and said base frame at the ends thereof maintaining the auxiliary frame thereabove, said means including a fluid cylinder means, a supply of fluid therefor, valve control means connected to said supply and said cylinder means for automatically controlling the movement of fluid therein and thereout, intersecting lever means pivotally disposed between said frames adjacent to said cylinder means with the lower portion of each of the lever means being provided with a roller movable in a track member positioned on said base frame, said lever means being transversely positioned with respect to the longitudinal axis of the frames, and weight responsive means positioned between said auxiliary frame and said control means regulating said valve means upon the placement of weight on said auxiliary frame.
Claim 3
Dependent Claim
31 words
The mattress support of claim 1 wherein a restraining means is positioned between the upper auxiliary frame and the base frame support for limiting the upward movement of said auxiliary frame.
Claim 4
Dependent Claim
19 words
The mattress support of claim 2 wherein said restraining means is a belt attached to the said respective frames.
Claim 5
Dependent Claim
45 words
The mattress support of claim 1 wherein said weight responsive means is comprised of pivoted links positioned between the auxiliary frame and the valve control means whereby collapsing of the same will cause the valve to regulate the flow of fluid into the cylinder means.
Claim 6
Dependent Claim
26 words
The mattress support of claim 1 wherein said fluid cylinder is supported on a plate secured to the base frame at the end and centrally thereof.
Claim 7
Dependent Claim
53 words
The mattress support of claim 1 wherein the valve control means permits a predetermined amount of fluid to be introduced into said cylinder whereby the same will raise the auxiliary frame to a pre-set level notwithstanding the weight positioned on said auxiliary frame whereby an equal amount of cushioning will always been obtained.
Claim 8
Dependent Claim
26 words
The mattress support of claim 6 wherein the base frame and the auxiliary frame are rectangular in configuration and disposed in general alignment with one another.
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) | 1983-04-08 | 1983-10-08 | 1984-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-08 | 1987-10-08 | 1988-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-08 | 1991-10-08 | 1992-04-08 | $7700.00 | Window Closed / Lapsed |