Patent US4920722A successfully refreshed from Google Patents.
US4920722A
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Composable well
Assignee: Europlast SpA
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Filing: 1988-05-10
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Granted: 1990-05-01
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Expires: 2008-05-10
Abstract
Abstract A composable well of right prismatic or right cylindrical shape has a polygonal or circular base respectively, and consists of a plurality of walls (1), the walls having on their lateral borders, on one side a plurality of hooking elements (2) of male type and on the opposite side a plurality of hooking elements (3) of female type. Stable hooking between each wall (1) with the preceding wall and the successive wall is easily achieved. The well may be easily transported and stored in the form of a plurality of walls which are superimposed and occupy little space and is then assembled at the final place. After it is assembled, the well forms a box-type structure, with or without the bottom closure and does not require nails, screws or the like.
Inventors
- 👤 Giulio Bosi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:04
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12; Y; Y10; Y10S; Y10S285/00; Y10S285/921; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6966; Y10T137/6991
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
240 words
A composable well of right prismatic or right cylindrical shape having a polygonal or circular base respectively, which consists of a plurality of walls (1) having lateral or vertical borders said walls having on the lateral borders thereof, on one side a plurality of hooking elements (2) of male type and on the opposite side thereof a plurality of hooking elements (3) of female type wherein the hooking elements (2) of male type consist of sectors (2') of substantial planar shape, said sectors being the extensions from one of said lateral borders of each of said walls (1), said sectors having at the end thereof a portion (2") of enlarged section and in the shape of an isosceles trapezium, and wherein the hooking elements (3) of female type consist of a plurality of slits (3') which constitute the inlet mouth of a conduit defined by a pair of small walls (3'") and (3'), said pair of small walls being disposed essentially transversally with respect to each of said walls (1), the first of said small walls (3'") being perpendicular with respect to said wall (1), the second small wall (3') being slightly inclined with respect to said wall (1), whereby at the end of said conduit it is closer to said first small wall (3'"), said small walls being made of elastic material with a portion of the male hooking element passing through and beyond said pair of small walls.
Claim 2
Dependent Claim
240 words
A composable well of right prismatic or right cylindrical shape having a polygonal or circular base respectively, which consists of a plurality of walls (1) having lateral or vertical borders said walls having on the lateral borders thereof, on one side a plurality of hooking elements (2) of male type and on the opposite side thereof a plurality of hooking elements (3) of female type wherein the hooking elements (2) of male type consist of sectors (2') of substantial planar shape, said sectors being the extensions from one of said lateral borders of each of said walls (1), said sectors having at the end thereof a portion (2") of enlarged section and in the shape of an isosceles trapezium, and wherein the hooking elements (3) of female type consist of a plurality of slits (3') which constitute the inlet mouth of a conduit defined by a pair of small walls (3'") and (3'), said pair of small walls being disposed essentially transversally with respect to each of said walls (1), the first of said small walls (3'") being perpendicular with respect to said wall (1), the second small wall (3') being slightly inclined with respect to said wall (1), whereby at the end of said conduit it is closer to said first small wall (3'"), said small walls being made of elastic material with a portion of the male hooking element passing through and beyond said pair of small walls.
Claim 3
Dependent Claim
130 words
The composable well according to claim 1 which comprises on the upper part thereof a second pair of hooking elements (6,7) of male and female type respectively, said pair of hooking elements consisting of a sector (6'), said sector being the extension of one of said lateral borders of said wall (1), said sector ending in an enlarged portion (6") in the shape of a rectangular trapezium, said female type element consisting of a recess (7) formed in the opposite portion of said lateral border of said wall, said recess having a cut-out portion (8) along the entire height thereof whereby the border of said enlarged portion (6") of said sector (6') of another wall (1) projecting towards the exterior is placed over the ledge formed by said cut-out portion.
Claim 4
Dependent Claim
71 words
The composable well according to claim 1 wherein corresponding to said lower border of said wall (1), along the internal surfaces thereof, two ribs in relief (5) are horizontally located and are placed at a limited reciprocal distance, said ribs being capable of holding the border of a lower closure plane forming the bottom of said well, said bottom having the shape and dimensions corresponding to the base of said well.
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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) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |