US4594281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight impact absorbing panel
Assignee: Mitsubishi Electric Corp
•
Filing: 1985-03-21
•
Granted: 1986-06-10
•
Expires: 2005-03-21
Abstract
Abstract A panel used as a material for forming a wall of a general building material such as an elevator is constituted from a rigid front plate and a rigid back plate having a corrugated cross-section adhered to the rear side of the front plate by means of a reinforcing bonding agent made of a synthetic resin material. The synthetic resin bonding agent contains at least one hollow body in order to minimize the specific gravity of the bonding agent to reduce the weight of the panel.
Inventors
- 👤 Kousuke Haraga
- 👤 Katutoshi Hattori
- 👤 Kazumi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:37
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/28; B32B27/00; B32B27/06; B32B15/00; B32B15/04; B32B15/08; B32B27/18; B32B27/40; B66; B66B; B66B11/00; B66B11/02; B66B11/0226; B66B13/00; B66B13/30; E; E04; E04C; E04C2/00; E04C2/02; E04C2/08; B32B2307/00; B32B2307/50; B32B2307/558; B32B2307/70; B32B2307/718; B32B2419/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249974; Y10T428/249982; Y10T428/249984; Y10T428/249986; Y10T428/25; Y10T428/252; Y10T428/259; Y10T428/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
198 words
In a panel comprising: a front plate made of a rigid material; a back plate mounted on the rear face of said front plate and having a corrugated cross-section, said back plate being made of a rigid material; and a reinforcing layer made of a synthetic resin material adhering opposed faces of said front plate and said back plate to each other; the improvement wherein said front plate is less than 1.2 mm in thickness, said synthetic resin is urethane resin with a Shore D hardness in the range of 40° to 60°, said synthetic resin reinforcing layer includes hollow particles therein, more than 5% weight of the total weight of the hollow particles are of a diameter ranging from 150 mu m to 250 mu m, to create a reinforcing layer of relatively low specific density, of high impact strength and of good vibration prevention quality, and wherein the reinforcing layer covers the entire rear face of said front plate, the thickness of the reinforcing layer adhering to opposed faces of the front plate and back plate is in the range from 0.5 mm to said front plate at portions other than that adhering the 5 mm.
Claim 2
Dependent Claim
198 words
In a panel comprising: a front plate made of a rigid material; a back plate mounted on the rear face of said front plate and having a corrugated cross-section, said back plate being made of a rigid material; and a reinforcing layer made of a synthetic resin material adhering opposed faces of said front plate and said back plate to each other; the improvement wherein said front plate is less than 1.2 mm in thickness, said synthetic resin is urethane resin with a Shore D hardness in the range of 40° to 60°, said synthetic resin reinforcing layer includes hollow particles therein, more than 5% weight of the total weight of the hollow particles are of a diameter ranging from 150 mu m to 250 mu m, to create a reinforcing layer of relatively low specific density, of high impact strength and of good vibration prevention quality, and wherein the reinforcing layer covers the entire rear face of said front plate, the thickness of the reinforcing layer adhering to opposed faces of the front plate and back plate is in the range from 0.5 mm to said front plate at portions other than that adhering the 5 mm.
Claim 3
Dependent Claim
66 words
A panel according to claim 1, wherein said corrugated back plate has surfaces of convex portions which serve as adhering faces by which said back plate is adhered to said front plate, and the thickness of said reinforcing synthetic resin layer on said adhering faces is smaller than the thickness of said reinforcing synthetic resin layer on said back plate other than at said adhering faces.
Claim 4
Dependent Claim
23 words
A panel according to claim 1, wherein said hollow particles are of a material selected from the group consisting of glass and ceramics.
Claim 5
Dependent Claim
59 words
A panel according to claim 1, wherein said front plate has, at opposite ends thereof, reversely bent portions, and said back plate has a smaller overall length than that of said front plate, and the height of the corrugations of said back plate is substantially the same as the height of said reversely bent portions of said front plate.
Claim 6
Dependent Claim
17 words
A panel according to claim 1, wherein said particles comprise dried and baked volcanic ash or pumice.
Claim 7
Dependent Claim
23 words
A panel according to claim 1, wherein said front plate is formed of metal having a thickness of about 0.6 to 0.8 mm.
References Cited (Backward Citations)
US3313147A
Cited
US3917547A
Cited
US4101704A
Cited
US4367296A
Cited
US4433023A
Cited
DE3123134A1
Cited
US4414257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |