Patent US4712773A successfully refreshed from Google Patents.
US4712773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple panel play area
Assignee: NORTH STATES INDUSTRIES Inc A CORP OF
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Filing: 1987-04-24
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Granted: 1987-12-15
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Expires: 2007-04-24
Abstract
Abstract A multiple panel unit for creating a play area for young children in which each panel has a rigid rectangular frame and is connected to an adjacent panel by a hinge structure at the top and bottom of the panels permitting the panels to be pivoted with respect to each other at the hinge. The top of a first of two adjacent panels and the corresponding end of the hinge structure are formed for releasably retaining the end of the hinge and the bottom of the second of the adjacent panels and the corresponding end of the bottom hinge structure are formed with a pin and a mating recess that are matable in a direction parallel to the hinge pivot axis.
Inventors
- 👤 Donald A. Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:52
CPC Classifications
A; A47; A47D; A47D13/00; A47D13/06; A47D13/061; A47D13/065
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
202 words
In a multiple panel unit for creating a play area for young children in which each panel has a rigid rectangular frame and is connected to an adjacent panel by a hinge structure at the top and bottom of the panels, permitting the panels to be pivoted with respect to each other at the hinge, the improvement comprising: the top of a first of two adjacent panels having a releasable retaining means for releasably retaining one end of the hinge structure connecting said two panels and said one end of the hinge structure being complementarily formed for being retained by said releasable retaining means, said releasable retaining means including a spring loaded slide mechanism for retaining the hinge end when the slide mechanism is first held in an open position against the force of the spring and the hinge end is positioned in its retention position and the slide mechanism is then released and urged to its retention position by said spring, the bottom of the second of said two adjacent panels and the corresponding end of the bottom hinge structure being formed with a pin and a mating recess that are matable in a direction parallel to the hinge pivot axis.
Claim 2
Dependent Claim
202 words
In a multiple panel unit for creating a play area for young children in which each panel has a rigid rectangular frame and is connected to an adjacent panel by a hinge structure at the top and bottom of the panels, permitting the panels to be pivoted with respect to each other at the hinge, the improvement comprising: the top of a first of two adjacent panels having a releasable retaining means for releasably retaining one end of the hinge structure connecting said two panels and said one end of the hinge structure being complementarily formed for being retained by said releasable retaining means, said releasable retaining means including a spring loaded slide mechanism for retaining the hinge end when the slide mechanism is first held in an open position against the force of the spring and the hinge end is positioned in its retention position and the slide mechanism is then released and urged to its retention position by said spring, the bottom of the second of said two adjacent panels and the corresponding end of the bottom hinge structure being formed with a pin and a mating recess that are matable in a direction parallel to the hinge pivot axis.
Claim 3
Dependent Claim
78 words
The multiple panel unit of claim 1 wherein said releasable retaining means for releasably retaining one end of the hinge structure connecting said two adjacent panels includes the top of said first of said two adjacent panels and said one end of said hinge structure being formed with a pin and a mating recess that are matable in a direction parallel to said pin and mating recess at the bottom of said second of the two adjacent panels.
Claim 4
Dependent Claim
36 words
The multiple panel unit of claim 1 wherein said pin is on the top of said first of said two adjacent panels and said mating recess is formed adjacent said one end of said hinge structure.
Claim 5
Dependent Claim
94 words
The multiple panel unit of claim 3 wherein said releasable retaining means includes a plunger forming part of said slide mechanism matable with a recess in the end of the hinge structure when the slide mechanism is first held in said open position against the force of said spring, the hinge end is positioned in its said retention position with its recess mated with said pin on the top of said first of said two adjacent panels and said slide mechanism is then released and urged to its said retention position by said spring.
Claim 6
Dependent Claim
64 words
The multiple panel unit of claim 4 wherein when said end of said upper hinge structure is removed from said releasable retaining means and said slide mechanism is released said plunger engages against said pin on the top of said first of said two adjacent panels which pin then acts as a stop to prevent further movement of said slide mechanism by said spring.
Claim 7
Dependent Claim
54 words
The multiple panel unit of claim 1 wherein each pair of adjacent panels has one end of the hinge structure at the top of the panels releasably retained as recited in claim 1 and the bottom of the other panel mated with the end of the bottom hinge structure as recited in claim 1.
Claim 8
Dependent Claim
38 words
The multiple panel unit of claim 1 wherein the bottom of said second of said two adjacent panels is formed with a pin and, said corresponding end of the bottom hinge structure is formed with a mating recess.
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) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |