1 Introduction
2 Method for wood threaded fasteners patents search
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F16B 25/00 Screws that form threads in the body into which they are screwed, e.g. wood screws, self-tapping screws [2006.01]
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F16B 25/02 by a cutting and material removing action, e.g. fluted self-tapping screws [2006.01]
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F16B 25/04 by a slicing and material displacing action, e.g. wood screws with sharp thread crests [2006.01]
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F16B 25/06 by swaging, i.e. material deforming action [2006.01]
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F16B 25/08 by a combination of any two or all of the actions provided for in groups F16B 25/02-F16B 25/06 [2006.01]
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F16B 25/10 Screws performing an additional function to thread-forming, e.g. drill screws [2006.01]
3 Results and discussion
3.1 Number and structure of patent documents relating to wood screws
Criteria | Number of all patent families in F16B 25 group | Number of all patent documents in F16B 25 group | Number of wood screw patent families in F16B 25 group | Number of wood screw patent documents in F16B 25 group |
---|---|---|---|---|
Applications and granted patents (1902–2017) | 5808 | 13545 | 611 | 1031 |
Granted patents (1902–2017) | 2916 | 6727 | 337 | 625 |
3.2 Influence of patents on other patents and non-patent literature
Patent or patent application # | Number of family members | Title | Priority year | Estimated expiry year |
---|---|---|---|---|
EP 0831239B1 (Schulte 1998) | 18 | Cutting screw | 1996 | 2017 |
NZ 328831 A [US 6109850 A (Commins 2000)] | 6 | Screw fastener in metal connector to wood structure shear connection | 1996 | 2017 |
9 | Drill screw | 1996 | 2017 | |
EP 0970312B1 (Petit 2000) | 8 | Novel wood screw with cut-out thread | 1997 | 2018 |
US 6152666A (Walther et al. 2000) | 14 | Screw for use as a fastener in fibrous material such as wood | 1998 | 2018 |
EP0984177B1 (Wieland 2000) | 5 | Connecting screw for wood-concrete composite structure | 1998 | 2019 |
AU 2000/012778 A (Ulryck 2001) (FR 2786229 B1) | 4 | Wood-screw or the like | 1998 | 2019 |
CA 2299129 C (Lindal 2008) | 4 | Waterproof joints between timbers | 1999 | 2020 |
US6056491A (Hsu 2000) | 1 | Screw having cutting teeth formed on threads thereof | 1999 | 2019 |
AU 760715 B2 (Saman and Gurong 2003) | 2 | Improvements relating to self-drilling screws | 1999 | 2020 |
Publication # | Title | Priority year | Expiry year |
---|---|---|---|
US 20160146241 A1 (Eckert and Wunderlich 2016) | Wood screw with intermediate thread sections tapering to the front | 2013 | 2034 |
EP 2811182 A1 (Humm et al. 2014) | Screw for drilling and tapping in a first supporting surface section and a harder second supporting surface section | 2013 | 2034 |
US 20160115989 A1 (Hubmann 2014, Patent application) | Screw | 2013 | 2034 |
US 20150308481 A1 (Dissing 2015) | Method and screw for mounting fiber cement planks | 2012 | 2033 |
US 9145911 B2 (Shih 2015) | Anti-split wood screw | 2013 | 2033 |
US 8998550 B2 (Platt 2015) | Hardware attachment system | 2013 | 2033 |
EP 2669879 A2 (Rössner 2013) | Safety system for construction of a structure with a wooden component and structure produced using such a safety system | 2012 | 2033 |
US 8905696 B2 (Lapointe 2014) | Extension fastener for portable tool | 2012 | 2033 |
EP 2633959 B1 (Simon and Simon 2013) | Device for securing the wooden handle in the eye of a hammer head and screw for attaching a wooden handle in the eye of a hammer head | 2012 | 2033 |
US 9377045 B2 (Su and Su 2016) | Wood screw | 2012 | 2032 |
Patent no., filed, reference | No. of cited non-patent literature |
---|---|
US 7832173 B2 (2000) (Crawford et al. 2010) | 18 |
US 9482258 B2 (2012) (Park 2016) | 16 |
US 7189045 B2 (2004) (Mcgovern and Druschel 2008) | 10 |
US 7367768 B2 (2007) (Mcgovern and Druschel 2007) | 10 |
US 9051726 B2 (2013) (Vandenberg 2014) | 6 |
3.3 The most influential inventions relating to geometry of wood screws
Feature | Patent and application numbers, dates and bibliographic references | Substantiation |
---|---|---|
No. of forward citations | US 5516248A (1996) (DeHaitre 1996) US 4697969A (1987) (Sparkes 1987) US 6056491A (2000) (Hsu 2000) | Cited 87 times (by other patents) Cited 84 times (by other patents) Cited 67 times (by other patents) |
The largest families of patents and patent applications | IL 46025 D0 (Rosan and Reece 2018) CA 2827504A1 (Vandenberg 2014) DE 29906200 U1 (Dicke 1999) DE 202004002877 U1 (Dicke 2006a) | 29 members (1975–1981) 24 members (2011–2015) 22 members (1999–2009) 21 members (2005–2011) |
No. of backwards citations | US 9482258 B2 (2016) (Park 2016) US 9051726 B2 (2005) (Vandenberg 2014) US 8480343B2 (1013) (Vandenberg 2014) | Cites 176 patents Cites 155 patents Cites 148 patents |
The oldest patents cited by contemporary patents | US 4704 A (1846) US 24393 A (1859) US 126366 A (1872) (Wills 1872) | Cited by 4 patents (1952–2008) Cited by 5 patents (1972–2009) Cited by 165 patents (1952–2014) |
4 Conclusion
Bibliographic data | Substantiation | Essence of the invention |
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US 5516248 (1996) (DeHaitre 1996) | Cited 87 times (4.4 times per year) | Reducing the friction between the screw shank and the workpiece |
US 4697969 (1987) (Sparkes 1987) | Cited 84 times (2.9 times per year) | Improved self-drilling |
US 6056491 (2000) (Hsu 2000) | Cited 67 times (4.2 times per year) | Prevent the wood from being cracked |
US 126366 (1872) (Wills 1872) | Cited 165 times (1.1 times per year) | Boring a pilot hole Reducing the friction Prevent the wood from being cracked |
IL 46025 D0 (1975) (Rosan and Reece 2018) | Patent family with 29 members | Improved self-drilling |
CA 2725335 A1 (2010) (Vandenberg 2014) | Patent family with 24 members | Improved wood screw and improved its installation method |
DE 29906200 U1 (1999) (Dicke 1999) | Patent family with 22 members | Protection against unscrewing |
DE 202004002877 U1 (2004) (Dicke 2006a) | Patent family with 21 members | Improved thread forming in workpiece |