US4506483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof construction
Assignee: Norstar Bank of Upstate NY
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Filing: 1983-08-05
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Granted: 1985-03-26
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Expires: 2003-08-05
Abstract
Abstract A roof construction comprising ballast blocks each having two parallel edges bevelled at substantially identical angles of 12° to 23° from the vertical, the remaining two edges being substantially vertical, the blocks being laid in a pattern adjacent each rectangular corner of the roof so that downwardly and outwardly bevelled edges are adjacent each roof edge at the corner.
Inventors
- 👤 Thomas E. Phalen, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:28
CPC Classifications
E; E04; E04D; E04D11/00; E04D11/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
172 words
In a roof construction comprising a deck having at least one rectangular corner, a membrane, and a layer of abutting rows of ballast blocks laid above said membrane, each of said blocks having two parallel edges bevelled at substantially identical angles of 12° to 23° from the vertical, the remaining two edges being substantially vertical, the improvement which comprises having the blocks in said corner in a pattern in which the outer rows of said blocks except for the corner blocks are arranged with outwardly and downwardly bevelled edges adjacent to the edge of the deck, and means for clamping said block edges to said deck, each successive row of blocks inwardly from said outer row having the same alignment as said outer row except for the corner block at the intersection of the rows, each corner block in each row being in alignment with either of the two rows of which it forms a corner, said pattern extending inwardly from each edge of the roof corner for at least ten rows.
Claim 2
Dependent Claim
172 words
In a roof construction comprising a deck having at least one rectangular corner, a membrane, and a layer of abutting rows of ballast blocks laid above said membrane, each of said blocks having two parallel edges bevelled at substantially identical angles of 12° to 23° from the vertical, the remaining two edges being substantially vertical, the improvement which comprises having the blocks in said corner in a pattern in which the outer rows of said blocks except for the corner blocks are arranged with outwardly and downwardly bevelled edges adjacent to the edge of the deck, and means for clamping said block edges to said deck, each successive row of blocks inwardly from said outer row having the same alignment as said outer row except for the corner block at the intersection of the rows, each corner block in each row being in alignment with either of the two rows of which it forms a corner, said pattern extending inwardly from each edge of the roof corner for at least ten rows.
Claim 3
Dependent Claim
26 words
A roof construction as claimed in claim 1 in which an adhesive is present between said bevelled edges of adjacent blocks to bond said edges together.
Claim 4
Dependent Claim
30 words
A roof construction as claimed in claim 1 or 2 in which at least one additional layer of blocks in the same pattern is on top of said first layer.
Claim 5
Dependent Claim
31 words
A roof construction as claimed in claim 1 or 2 in which each said block has a plurality of parallel spaced channels in its bottom face parallel to said bevelled edges.
Claim 6
Dependent Claim
47 words
A roof construction as claimed in claim 1 or 2 in which each said block has a plurality of parallel spaced channels in its bottom face parallel to said bevelled edges and an additional channel in its bottom face adjacent and parallel to one said vertical edge.
Claim 7
Dependent Claim
58 words
A roof construction as claimed in claim 1 or 2 in which each said block has a weight of 10 to 17 lbs. per square foot of top face, a compressive strength of at least 2500 psi, a flexure strength of at least 300 psi, and is capable of undergoing at least 100 freeze thaw cycles without cracking.
References Cited (Backward Citations)
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Cited
US1558129A
Cited
CH378510A
Cited
US3387420A
Cited
DE2250555A1
Cited
US3892899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |