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US3968528A Expired / Lapsed US ⏱️ 0.0 years remaining

Bedstead having a woven support

Assignee: Individual
•
Filing: 1974-04-23
•
Granted: 1976-07-13
•
Expires: 1994-04-23
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Abstract

Abstract A bedstead is disclosed including crossheads between which a woven mat support is stretched. The mat is made of spring steel wire, preferably plastic coated and includes longitudinal wire members having U-shaped ends. Hook rails are carried by the crossheads and have adjacent recesses between which they define V-shaped hook members. One of the hook rails is adjustable so as to tension the mat support. A U-shaped clamping bar is provided into which the U-shaped ends of the longitudinal wire members are fitted. A resilient intermediate layer is positioned between the clamping bar and the U-shaped ends of the longitudinal wire members. The clamping bar is positioned in the V-shaped hook members of the adjustable hook rail such that a clamping force is exerted on the U-shaped ends of the longitudinal wire members by the clamping bar in proportion to tension force applied to the mat support by the adjustable hook rail.

Inventors

  • 👤 Jannes Jonge Poerink

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 06:10
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/12; A47C23/28; A47C23/26; A47C31/00; A47C31/02; A47C31/04; A47C31/06

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 158 words
Bedstead comprising crossheads between which a woven mat support is stretched, said mat being made of spring steel wire, preferably plastic coated, and including longitudinal wire members having U-shaped ends, hook rails carried by said crossheads each having a row of spaced apart V-shaped hook members with recesses therebetween, the hook members of one hook rail pointing towards the hook members of the other hook rail, one of said hook rails being adjustable so as to tension said mat support, a double folded U-shaped clamping bar encasing the U-shaped ends of the longitudinal wire members, the wire receiving open edge of said U-shaped clamping bar being nested in and facing the closed ends of the V-shaped hook members of said adjustable hook rail such that a clamping force is exerted on said clamping bar and said U-shaped ends by said V-shaped hook members in proportion to tension force applied to said mat support by the adjustable hook rail.
Claim 2
Dependent Claim 158 words
Bedstead comprising crossheads between which a woven mat support is stretched, said mat being made of spring steel wire, preferably plastic coated, and including longitudinal wire members having U-shaped ends, hook rails carried by said crossheads each having a row of spaced apart V-shaped hook members with recesses therebetween, the hook members of one hook rail pointing towards the hook members of the other hook rail, one of said hook rails being adjustable so as to tension said mat support, a double folded U-shaped clamping bar encasing the U-shaped ends of the longitudinal wire members, the wire receiving open edge of said U-shaped clamping bar being nested in and facing the closed ends of the V-shaped hook members of said adjustable hook rail such that a clamping force is exerted on said clamping bar and said U-shaped ends by said V-shaped hook members in proportion to tension force applied to said mat support by the adjustable hook rail.
Claim 3
Dependent Claim 22 words
Bedstead of claim 1 wherein a resilient intermediate layer is provided between said clamping bar and the ends of said longitudinal wires.
Claim 4
Dependent Claim 19 words
Bedstead of claim 2 wherein said resilient layer is a strip of plastic material inserted into the clamping bar.
Claim 5
Dependent Claim 15 words
Bedstead of claim 2 wherein said resilient layer is adhesively bonded to the clamping bar.
Claim 6
Dependent Claim 32 words
Bedstead of claim 1 wherein the adjustable hook rail has a horizontal flange, said recesses extending into said flange a distance such that such longitudinal wire members do not contact said flange.

References Cited (Backward Citations)

US371767A Cited
US630744A Cited
US805764A Cited
US1572831A Cited
US2218451A Cited
US2533565A Cited
US2615178A Cited
US2839126A Cited
US3483912A Cited
US3666277A Cited
US3800697A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-07-13 1980-01-12 1980-07-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-07-13 1984-01-12 1984-07-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-07-13 1988-01-12 1988-07-13 $7700.00 Window Closed / Lapsed

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