US4545270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for assuring predetermined joint loading in roof insulation assemblies
Assignee: Illinois Tool Works Inc
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Filing: 1984-04-30
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Granted: 1985-10-08
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Expires: 2004-04-30
Abstract
Abstract A fastener assembly for attaching roofing insulation to roof decks. A washer with a broad load-distributing flange has a crushable region which is deformed as the fastener becomes fully seated. This region insures that the joint is loaded with a predetermined force before the depth-sensitive driver disengages reducing the likelihood of overdriving or underdriving.
Inventors
- 👤 George G. Dewey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:16
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/36; E04D3/3601; E04D3/3603; F; F16; F16B; F16B31/00; F16B31/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
175 words
In combination with a fastener driving tool with a bit housed within a tubular nosepiece and travel of said bit relative to said nosepiece is limited, and a threaded fastener having an elongated shank with a head at one end driven by said tool, means for causing disengagement of said fastener from said tool comprising a washer having a broad load-distributing flange with a generally flat upper surface a pair of recesses in said upper surface, a first of said pair of recesses being larger than a second of said pair of recesses, said first recess being adapted to matingly locate said tubular nosepiece, said second recess being adapted to house the head of said fastener, a centrally located aperture smaller than said head, an axially extending boss adjacent said aperture, said boss being an intergral part of said washer, said boss being shaped to collapse a predetermined axial distance upon exertion of a predetermined tensile load in said fastener, said predetermined axial distance being sufficient to cause disengagement between said fastener and said tool.
Claim 2
Dependent Claim
175 words
In combination with a fastener driving tool with a bit housed within a tubular nosepiece and travel of said bit relative to said nosepiece is limited, and a threaded fastener having an elongated shank with a head at one end driven by said tool, means for causing disengagement of said fastener from said tool comprising a washer having a broad load-distributing flange with a generally flat upper surface a pair of recesses in said upper surface, a first of said pair of recesses being larger than a second of said pair of recesses, said first recess being adapted to matingly locate said tubular nosepiece, said second recess being adapted to house the head of said fastener, a centrally located aperture smaller than said head, an axially extending boss adjacent said aperture, said boss being an intergral part of said washer, said boss being shaped to collapse a predetermined axial distance upon exertion of a predetermined tensile load in said fastener, said predetermined axial distance being sufficient to cause disengagement between said fastener and said tool.
Claim 3
Dependent Claim
79 words
A combination according to claim 1 wherein said tool comprises a bit housed within a tubular nosepiece and travel of said bit relative to said nosepiece is limited, said washer having a pair of recesses in said upper surface, a first of said pair of recesses being larger than a second of said pair of recesses, said first recess being adapted to matingly locate said tubular nosepiece, said second recess being adapted to house the head of said fastener.
Claim 4
Dependent Claim
37 words
A combination according to claim 1 wherein said boss is located within a centrally located recess in said flange, whereby the head of said fastener is able to be seated beneath said upper surface of said flange.
Claim 5
Dependent Claim
28 words
A combination according to claim 1 wherein said boss is filleted and has a radial extent generally less than the radial extent of the head of said fastener.
Claim 6
Dependent Claim
32 words
A combination according to claim 1 wherein said boss slopes inwardly toward said aperture to facilitate formation of a seal around said shank upon axial compression of said boss by said head.
Claim 7
Dependent Claim
151 words
A plastic roofing washer for use with a screw having a shank and a heat at one end and a driving tool having a driving bit housed within a tubular nosepiece, said washer comprising a broad load-distributing flange, a centrally located aperture extending through said washer, said flange having a plurality of concentric recesses formed about said aperture in an upper surface of said washer, a first of said plurality of recesses providing locating means for positioning said tubular nosepiece, a second of said recesses providing means for receiving the head of said screw, said first recess having a radial extent greater than said second recess, an integrally formed locally deformable axially extending boss disposed within said second recess, said boss providing means for allowing disengagement of said head from said driving bit, and means for providing a seal around said shank upon axial compression of said boss by said head.
Claim 8
Dependent Claim
151 words
A plastic roofing washer for use with a screw having a shank and a heat at one end and a driving tool having a driving bit housed within a tubular nosepiece, said washer comprising a broad load-distributing flange, a centrally located aperture extending through said washer, said flange having a plurality of concentric recesses formed about said aperture in an upper surface of said washer, a first of said plurality of recesses providing locating means for positioning said tubular nosepiece, a second of said recesses providing means for receiving the head of said screw, said first recess having a radial extent greater than said second recess, an integrally formed locally deformable axially extending boss disposed within said second recess, said boss providing means for allowing disengagement of said head from said driving bit, and means for providing a seal around said shank upon axial compression of said boss by said head.
Claim 9
Dependent Claim
11 words
A washer according to claim 6 wherein said boss is filleted.
Claim 10
Dependent Claim
23 words
A washer according to claim 6 wherein said boss has a radial extent generally less than the radial extent of said screw head.
Claim 11
Dependent Claim
20 words
A washer according to claim 6 wherein said boss slopes inwardly toward said aperture to facilitate formation of said seal.
Claim 12
Dependent Claim
149 words
A plastic roofing washer for use with a screw having a shank and a head at one end and a driving tool having a driving bit housed within a tubular nosepiece, said washer comprising a broad load-distributing flange, a centrally located aperture extending through said washer, said flange having a plurality of concentric recesses formed about said aperture in an upper surface of said washer, a first of said plurality of recesses providing locating means for positioning a nosepiece, a second of said recesses providing means for receiving the head of a screw, said first recess having a radial extent greater than said second recess, an integrally formed locally deformable axially extending boss disposed within said second recess, said boss providing means for allowing disengagement of said head from a bit, and means for providing a seal around said shank upon axial compression of said boss by said head.
Claim 13
Dependent Claim
149 words
A plastic roofing washer for use with a screw having a shank and a head at one end and a driving tool having a driving bit housed within a tubular nosepiece, said washer comprising a broad load-distributing flange, a centrally located aperture extending through said washer, said flange having a plurality of concentric recesses formed about said aperture in an upper surface of said washer, a first of said plurality of recesses providing locating means for positioning a nosepiece, a second of said recesses providing means for receiving the head of a screw, said first recess having a radial extent greater than said second recess, an integrally formed locally deformable axially extending boss disposed within said second recess, said boss providing means for allowing disengagement of said head from a bit, and means for providing a seal around said shank upon axial compression of said boss by said head.
Claim 14
Dependent Claim
11 words
A washer according to claim 10 wherein said boss is filleted.
Claim 15
Dependent Claim
23 words
A washer according to claim 10 wherein said boss has a radial extent generally less than the radial extent of said screw head.
Claim 16
Dependent Claim
20 words
A washer according to claim 10 wherein said boss slopes inwardly toward said aperture to facilitate formation of said seal.
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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) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |