Patent US3563582A successfully refreshed from Google Patents.
US3563582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spline joint
Assignee: WR Grace and Co
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Filing: 1968-08-05
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Granted: 1971-02-16
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Expires: 1988-08-05
Abstract
Abstract A spline joint for joining panels constructed of fragile resilient material such as expanded polystyrene, to form a rigid assembly. The panels have a seat comprising at least a portion running the length of each abutting end to be joined. The spline is a relatively hard strip having barbed end portions which are embedded in the walls of the seat. A central shoulder rests in the seat permitting the panels to be pushed together so that the spline itself is not seen in the assembly.
Inventors
- 👤 Harold F Shroyer
- 👤 Francis Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:56
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/20; E04C2/205; E04B; E04B1/00; E04B1/38; E04B1/61; E04B1/6108; E04B1/612; E04B1/6145; E04B1/6154; F; F16; F16B; F16B5/00; Y; Y10; Y10S; Y10S24/00; Y10S24/30; Y10S24/31; Y10S24/32; Y10T; Y10T24/00; Y10T24/45; Y10T24/45005; Y10T24/45099; Y10T24/46; Y10T24/468
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
The combination of adjoining sections of a soft resilient foam plastic material having aligned seats formed therein the seats including aligned shoulder receiving grooves; and an elongated spline of a material which is rigid relative to the material of the adjoining sections having a flat body portion fitting within said seats, and having elongated ribs in the form of oppositely engaging barb shaped end portions at the ends of said spline the barbs projecting beyond the seats into the adjoining sections and including an elongated intermediate shoulder portion extending perpendicularly and received in part in each of the aligned shoulder receiving grooves, whereby the depth of entry of the elongated ribs is controlled while permitting close adjoinment of the respective sections so that the spline is hidden.
Claim 2
Dependent Claim
127 words
The combination of adjoining sections of a soft resilient foam plastic material having aligned seats formed therein the seats including aligned shoulder receiving grooves; and an elongated spline of a material which is rigid relative to the material of the adjoining sections having a flat body portion fitting within said seats, and having elongated ribs in the form of oppositely engaging barb shaped end portions at the ends of said spline the barbs projecting beyond the seats into the adjoining sections and including an elongated intermediate shoulder portion extending perpendicularly and received in part in each of the aligned shoulder receiving grooves, whereby the depth of entry of the elongated ribs is controlled while permitting close adjoinment of the respective sections so that the spline is hidden.
Claim 3
Dependent Claim
29 words
The combination according to claim 1 wherein the adjoining sections consist of a material selected from the group consisting of expanded polyethylene, expanded polypropylene, expanded polystyrene and expanded polyurethane.
Claim 4
Dependent Claim
22 words
The combination according to claim 1 wherein the spline consists of a material selected from the group consisting of polyethylene and polystyrene.
Claim 5
Dependent Claim
121 words
A spline joint comprising in combination; adjoining soft resilient panel sections having aligned in the abutting end portions thereof seats comprising a groove extending longitudinally of said ends, a slot of lesser width than, and extending from about the midpoint of the groove inward into said panel; a spline comprising a strip of hard material relative to said panel having a barb shaped elongated rib at the ends of the strip for embedding in the walls of said slot against extraction therefrom and including a central intermediate shoulder portion perpendicular to said strip substantially coextensive with said adjoining grooves for controlling the depth of entry of said ribs while permitting close adjoinment of said panels so that said spline is hidden.
Claim 6
Dependent Claim
121 words
A spline joint comprising in combination; adjoining soft resilient panel sections having aligned in the abutting end portions thereof seats comprising a groove extending longitudinally of said ends, a slot of lesser width than, and extending from about the midpoint of the groove inward into said panel; a spline comprising a strip of hard material relative to said panel having a barb shaped elongated rib at the ends of the strip for embedding in the walls of said slot against extraction therefrom and including a central intermediate shoulder portion perpendicular to said strip substantially coextensive with said adjoining grooves for controlling the depth of entry of said ribs while permitting close adjoinment of said panels so that said spline is hidden.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |