Patent US3891340A successfully refreshed from Google Patents.
US3891340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paving stone unit having integral connecting webs
Assignee: Individual
•
Filing: 1974-02-15
•
Granted: 1975-06-24
•
Expires: 1994-02-15
Abstract
Abstract A concrete paving stone unit formed of a number of individual spaced paving stones connected together by integral thin webs. The webs constitute predetermined breaking points in the unit, so that when the unit is laid in sand and vibrated, some of the webs can break to allow the individual stones to bed firmly in the sand. If the ground shifts at a later date, other webs may break to allow the stones to conform to the new ground contour.
Inventors
- 👤 Hans Bolli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:19
CPC Classifications
E; E01; E01C; E01C5/00; E01C5/06; E01C2201/00; E01C2201/16; E01C2201/162; E01C2201/167
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
124 words
A paving stone unit comprising a plurality of individual concrete paving stones spaced apart from each other in a predetermined pattern, said stones all being of substantially uniform thickness, and a plurality of webs joining said stones together, said webs also being of concrete and being integral with said stones and being of thickness not greater than one quarter of the thickness of said stones the distance by which each stone is spaced from adjacent stones being small relative to the lateral dimensions of said stones, whereby when individual stones in said unit are supported only by said webs and are subjected to normal traffic, the webs connecting such stones to the remainder of said unit will fracture while leaving all said stones intact.
Claim 2
Dependent Claim
124 words
A paving stone unit comprising a plurality of individual concrete paving stones spaced apart from each other in a predetermined pattern, said stones all being of substantially uniform thickness, and a plurality of webs joining said stones together, said webs also being of concrete and being integral with said stones and being of thickness not greater than one quarter of the thickness of said stones the distance by which each stone is spaced from adjacent stones being small relative to the lateral dimensions of said stones, whereby when individual stones in said unit are supported only by said webs and are subjected to normal traffic, the webs connecting such stones to the remainder of said unit will fracture while leaving all said stones intact.
Claim 3
Dependent Claim
20 words
A paving stone unit according to claim 1 wherein said webs are located substantially at the bottoms of said stones.
Claim 4
Dependent Claim
36 words
A paving stone unit according to claim 1 and being of a length of between 0.3 and 1.5 meters and of width between 0.3 and 1.5 meters, said stones being between 6 and 40 in number.
Claim 5
Dependent Claim
22 words
A paving stone unit according to Claim 3 wherein the spaces between said stones are between 0.3 and 2.0 cm. in width.
Claim 6
Dependent Claim
46 words
A paving stone unit according to claim 4 wherein each said stone is quadrilateral in outline, said unit having exterior stones along its edges and interior stones, each interior stone being connected to each adjacent interior stone by one said web at each of its sides.
Claim 7
Dependent Claim
123 words
A paving stone unit comprising a plurality of individual concrete paving stones spaced apart from each other in a predetermined pattern, and a plurality of webs joining said stones together, said webs also being of concrete and being integral with said stones and being of substantially less thickness than that of said stones whereby said webs constitute predetermined breaking points in said unit, said webs being located at selected locations in said spaces between said stones, said unit having exterior stones along its edges and interior stones, the total cross-sectional area of the webs joining each exterior stone to its adjacent stones being at least as great as the total cross-sectional area of the webs joining each interior stone to its adjacent stones.
Claim 8
Dependent Claim
123 words
A paving stone unit comprising a plurality of individual concrete paving stones spaced apart from each other in a predetermined pattern, and a plurality of webs joining said stones together, said webs also being of concrete and being integral with said stones and being of substantially less thickness than that of said stones whereby said webs constitute predetermined breaking points in said unit, said webs being located at selected locations in said spaces between said stones, said unit having exterior stones along its edges and interior stones, the total cross-sectional area of the webs joining each exterior stone to its adjacent stones being at least as great as the total cross-sectional area of the webs joining each interior stone to its adjacent stones.
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |