Patent US4180877A successfully refreshed from Google Patents.
US4180877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mattress
Assignee: L&P Property Management Co
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Filing: 1978-09-22
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Granted: 1980-01-01
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Expires: 1998-09-22
Abstract
Abstract A mattress having increased firmness in a preselected area on both sides of the mattress through use of a welded wire grid structure attached to the opposite sides of the mattress. In one preferred form, the increased firmness is provided only in a preselected area, e.g., the center one-third area of the mattress, by a welded wire grid while in another preferred embodiment, the grid wires extend over the complete area of the mattress. The wire grids are preformed and assembled as a separate subassembly and are attached to the preassembled spring core by conventional connectors, as for example, conventional hog rings.
Inventors
- 👤 Larry Higgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:53
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/04; A47C27/045; A47C27/0456
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
174 words
An improved mattress comprising, a coil spring assembly including a plurality of coil springs arranged in a matrix configuration having a plurality of transverse coil spring rows and a plurality of longitudinal coil spring columns, said transverse rows and longitudinal columns of coil springs being interconnected by helical lacing wires, two wire grids sized to overlie a desired and pre-selected surface area of that coil spring matrix, one of said wire grids being located on the top surface of said mattress, and the other of said wire grids being located on the bottom surface of said mattress, each of said wire grids having a border wire and a plurality of grid wires welded to said grid border wire, each of said wire grids being constructed as a preformed subassembly prior to connection with said coil spring assembly, and said coil spring assembly being constructed as a preformed subassembly prior to connection with said wire grids, and connector means for connecting each of said wire grids to said coil spring assembly in said pre-selected area.
Claim 2
Dependent Claim
174 words
An improved mattress comprising, a coil spring assembly including a plurality of coil springs arranged in a matrix configuration having a plurality of transverse coil spring rows and a plurality of longitudinal coil spring columns, said transverse rows and longitudinal columns of coil springs being interconnected by helical lacing wires, two wire grids sized to overlie a desired and pre-selected surface area of that coil spring matrix, one of said wire grids being located on the top surface of said mattress, and the other of said wire grids being located on the bottom surface of said mattress, each of said wire grids having a border wire and a plurality of grid wires welded to said grid border wire, each of said wire grids being constructed as a preformed subassembly prior to connection with said coil spring assembly, and said coil spring assembly being constructed as a preformed subassembly prior to connection with said wire grids, and connector means for connecting each of said wire grids to said coil spring assembly in said pre-selected area.
Claim 3
Dependent Claim
24 words
An improved mattress as set forth in claim 1, said grid wires being unconnected one to another at the majority of their crossover points.
Claim 4
Dependent Claim
27 words
An improved mattress as set forth in claim 1, said grid border wire being sized and configured so as to conform to the periphery of said mattress.
Claim 5
Dependent Claim
54 words
An improved mattress unit as set forth in claim 1, said wire grids being sized and configured to overlie the center one-third section of said coil spring matrix, said center section being disposed generally midway between end edges of said coil spring matrix and extending generally between side edges of said coil spring matrix.
Claim 6
Dependent Claim
50 words
An improved mattress as set forth in claim 1, said wire grids comprising a number of transverse wires equal to the number of transverse spring rows embraced by said wire grid and a number of longitudinal wires less than the number of longitudinal spring rows embraced by said wire grid.
Claim 7
Dependent Claim
60 words
An improved mattress as set forth in claim 1, each of said wire grids comprising at least one of (a) a number of transverse grid wires less than the number of transverse spring rows embraced by said wire grid, and (b) a number of longitudinal grid wires less than the number of longitudinal spring columns embraced by said wire grid.
Claim 8
Dependent Claim
34 words
An improved mattress as set forth in claim 6, each of said wire grids comprising a number of longitudinal grid wires less than the number of longitudinal spring columns embraced by said wire grid.
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) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |