Patent US4787188A successfully refreshed from Google Patents.
US4787188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stress plate and method of using same for securing a roof membrane to a roof deck
Assignee: Engineered Construction Components America Inc
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Filing: 1987-10-05
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Granted: 1988-11-29
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Expires: 2007-10-05
Abstract
Abstract A stress plate and method for securing a membrane to a roof deck wherein the plate includes gripping prongs which grip the membrane, preferably without piercing the membrane, wherein a stress plate surface having the gripping prongs is placed in contact with a top surface of a roof membrane to clamp the membrane to a roof structure.
Inventors
- 👤 Colin R. Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:50
CPC Classifications
E; E04; E04D; E04D5/00; E04D5/14; E04D5/141; E04D5/142; E04D5/144; E04D5/145
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
132 words
In a roof including a roof membrane, the improvement comprising: a stress plate having a top surface and a bottom surface, said plate including an opening for receiving a fastening means for securing the stress plate to a roof, said bottom surface being in contact with a roof membrane portion which is in contact with the roof, said stress plate having at least three spaced prongs extending outwardly from the bottom surface of said plate, said at least three spaced prongs being unitary with said plate; and fastening means received in said opening and secured to the roof, said prongs gripping the top surface of said membrane portion which is in contact with the roof, said stress plate clamping the membrane between the bottom surface of the stress plate and the roof.
Claim 2
Dependent Claim
132 words
In a roof including a roof membrane, the improvement comprising: a stress plate having a top surface and a bottom surface, said plate including an opening for receiving a fastening means for securing the stress plate to a roof, said bottom surface being in contact with a roof membrane portion which is in contact with the roof, said stress plate having at least three spaced prongs extending outwardly from the bottom surface of said plate, said at least three spaced prongs being unitary with said plate; and fastening means received in said opening and secured to the roof, said prongs gripping the top surface of said membrane portion which is in contact with the roof, said stress plate clamping the membrane between the bottom surface of the stress plate and the roof.
Claim 3
Dependent Claim
20 words
The improvement of claim 1 wherein the plate includes four gripping prongs circumferentially spaced from each other by 90 degrees.
Claim 4
Dependent Claim
23 words
The improvement of claim 1 wherein said prongs grip and indent said top surface of said membrane without puncturing entirely through said membrane.
Claim 5
Dependent Claim
14 words
The improvement of claim 1 wherein said opening is recessed in said top surface.
Claim 6
Dependent Claim
12 words
The improvement of claim 1 wherein the plate is a circular plate.
Claim 7
Dependent Claim
12 words
The improvement of claim 5 wherein the opening is a central opening.
Claim 8
Dependent Claim
20 words
The improvement of claim 1 wherein the plate is formed from plastic and the plate has a concave lower surface.
Claim 9
Dependent Claim
24 words
The improvement of claim 7 wherein the plate is a circular plate and the prongs are positioned adjacent to the periphery of the plate.
Claim 10
Dependent Claim
32 words
The improvement of claim 1 wherein the roof is comprised of a roof deck and roof insulation and the bottom surface of the stress plate is in contact with the roof membrane.
Claim 11
Dependent Claim
25 words
The improvement of claim 9 wherein said stress plate is in contact with a roof membrane portion which is overlaped with another roof membrane portion.
Claim 12
Dependent Claim
13 words
The improvement of claim 1 wherein said prongs have a substantially triangular shape.
Claim 13
Dependent Claim
20 words
The improvement of claim 11 wherein said plate includes four gripping prongs circumferentially spaced from each other by 90 degrees.
Claim 14
Dependent Claim
17 words
The improvement of claim 11 and further comprising insulating material between the roof membrane and roof deck.
Claim 15
Dependent Claim
18 words
The improvement of claim 1 wherein the stress plate includes at least one rib, for reinforcing said plate.
Claim 16
Dependent Claim
14 words
The improvement of claim 14 wherein the gripping prongs have a substantially triangular shape.
Claim 17
Dependent Claim
18 words
The improvement of claim 14, wherein said bottom surface includes a raised hub portion adjacent to said opening.
Claim 18
Dependent Claim
20 words
The improvement of claim 1 wherein the plate is formed from plastic and the plate has a concave lower surface.
Claim 19
Dependent Claim
24 words
The improvement of claim 17 wherein the plate is a circular plate and the prongs are positioned adjacent to the periphery of the plate.
Claim 20
Dependent Claim
23 words
The improvement of claim 18 wherein the prongs have a length which grips a roof membrane without puncturing entirely through the roof membrane.
Claim 21
Independent Claim
114 words
A method of securing a roof membrane, to a roof comprising: placing a stress plate having at least three spaced prongs on a bottom surface thereof with the bottom surface in contact with a top surface of a roof membrane portion which is in contact with a roof, said at least three spaced prongs being unitary with said plate; and clamping said roof membrane between said bottom surface of the stress plate and the roof by securing to a roof a fastening means positioned in an opening in the stress plate, said clamping providing gripping contact between said prongs and a top surface of said membrane portion which is in contact with the roof.
Claim 22
Independent Claim
114 words
A method of securing a roof membrane, to a roof comprising: placing a stress plate having at least three spaced prongs on a bottom surface thereof with the bottom surface in contact with a top surface of a roof membrane portion which is in contact with a roof, said at least three spaced prongs being unitary with said plate; and clamping said roof membrane between said bottom surface of the stress plate and the roof by securing to a roof a fastening means positioned in an opening in the stress plate, said clamping providing gripping contact between said prongs and a top surface of said membrane portion which is in contact with the roof.
Claim 23
Dependent Claim
23 words
The method of claim 20 wherein said prongs indent the top surface of said roof membrane without puncturing entirely through said roof membrane.
Claim 24
Dependent Claim
32 words
The method of claim 20 wherein the roof is comprised of a roof deck and roof membrane and the bottom surface of the stress plate is in contact with the roof membrane.
Claim 25
Dependent Claim
30 words
The method of claim 22 wherein the stress plate is placed in contact with a top surface of a roof membrane portion which is overlaped with another roof membrane portion.
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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) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |