Inventor
Steven W. Wentworth
Inventor
Brookfield, WI, US
Overview
Patents· 71 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling48%
F16LPipes21%
Y10TTechnical subjects covered by former us classification14%
B66DCapstans3%
H02GInstallation of electric cables or lines, or of combined optical and electric cables or lines3%
E21CMining or quarrying2%
F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges2%
B08BCleaning in general1%
B25BTools or bench devices not otherwise provided for, for fastening, connecting, disengaging, or holding1%
B62KCycles1%
PatentTitleYear
11,112,033Pipe extraction assisted by pre-stressed strand202110,969,053Lead pipe spudding prior to extraction or remediation202110,927,602Reversible pneumatic pipe ramming tool202110,883,628Extraction of ductile pipe202110,584,807Extraction of ductile pipe202010,550,989Latch assembly for use with an inversion drum202010,415,722Split ring ram adapter with cam adjustment201910,246,949Slip style rod spinner for pipe bursting machine201910,161,201Powered slip actuation20189,915,109'Slip style rod spinner for pipe bursting machine'20189,328,760'Quick connect rods'20168,979,435'Rod pulling and pushing machine for pipe bursting'20158,955,586'Beacon assembly'20158,789,891'Method and apparatus for creating a planar cavern'20148,646,846'Method and apparatus for creating a planar cavern'20148,640,793'Dynamic steering tool'20148,225,885'Joint for use in back reaming'20128,157,478'Rod pushing and pulling machine'20127,909,539'Rod pulling and pushing machine for pipe bursting'20117,828,903'Method and apparatus for removing tuberculation from sanitary water pipelines'20107,500,651'Portable winch'20097,255,516'Method and apparatus for replacement of underground pipe'20077,140,806'Rod pulling and pushing machine for pipe bursting'20067,128,499'Method for extracting underground pipe'20067,086,808'Method and apparatus for on-grade boring'20067,055,621'Method and apparatus for replacement of underground pipe'20067,048,257'Winch with telescoping mast'20066,913,091'Method and apparatus for replacement of underground pipe'20056,860,514'Drill string joint'20056,792,820'Method and accessories for pipe replacement'20046,789,635'Drill bit for directional drilling in cobble formations'20046,761,507'Method and apparatus for replacement of underground pipe'20046,755,593'Pipe replacement method and rotary impact mechanism for pipe bursting'20046,655,874'Method and apparatus for slitting flexible pipe in an underground bore'20036,588,515'Drill bit for directional drilling'20036,581,680'Apparatus for mounting an electronic device for use in directional drilling'20036,568,488'Roller pipe burster'20036,533,052'Drill bit for impact-assisted directional boring'20036,516,899'Method and apparatus for directional boring under mixed conditions'20036,470,979'Sonde housing structure'20026,450,269'Method and bit for directional horizontal boring'20026,439,319'Method and apparatus for directional boring under mixed conditions'20026,422,782'Apparatus for mounting an electronic device for use in directional drilling'20026,390,207'Method and apparatus for directional boring under mixed conditions'20026,390,087'Drill bit for directional drilling'20026,371,223'Drill head for directional boring'20026,321,858'Bit for directional drilling'20016,302,410'Rod gripping jaw'20016,299,382'Method for installing an underground pipe'20016,283,229'Impact device for directional boring'20016,273,201'Pneumatic ground piercing tool with movable chisel head'20016,269,889'Ground piercing tool with plastic body'20016,263,983'Apparatus for directional drilling'20016,260,634'Sonde housing for directional drilling'20016,261,027'Portable pulling apparatus'20016,171,026'Method and apparatus for replacement of pipelines'20016,148,935'Joint for use in a directional boring apparatus'20005,782,311'Method and apparatus for installation of underground pipes'19985,687,803'Method for reversing a ground piercing tool'19975,651,639'Method and apparatus for installation of underground pipe'19975,603,383'Reversible pneumatic ground piercing tool'19975,505,270'Reversible pneumatic ground piercing tool'19965,494,116'Pneumatic impact tool for pipe insertion'19965,487,430'Pneumatic ground-piercing tool and body therefor'19965,465,797'Pneumatic ground piercing tool with detachable head'19955,440,797'Method for making a pneumatic ground piercing tool'19955,337,837'Dual-diameter pneumatic ground piercing tool'19945,317,953'Neutral-centering valve control system'19945,199,151'Method for making a pneumatic ground piercing tool'19935,025,868'Pneumatic ground piercing tool'19914,775,163'Motorcycle'1988Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1988–1996Based in Greenfield, WI, US· patent location history
1991–1997Patents assigned to EARTH TOOL CORP (9)· patent assignee history
1994–2012Based in Brookfield, WI, US· patent location history
1997–2021Patents assigned to EARTH TOOL CO LLC (55)· patent assignee history
2012–2015Patents assigned to WENTWORTH STEVEN W (7)· patent assignee history
2012–2015Patents assigned to CRANE ROBERT F (6)· patent assignee history
2012–2018Based in Fountain Hills, AZ, US· patent location history
2018–2021Based in Scottsdale, AZ, US· patent location history
2020–2021Patents assigned to CHARLES MACHINE WORKS (5)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| EARTH TOOL CO LLC | 55 | 1997–2021 |
| EARTH TOOL CORP | 9 | 1991–1997 |
| WENTWORTH STEVEN Wself | 7 | 2012–2015 |
| CRANE ROBERT F | 6 | 2012–2015 |
| CHARLES MACHINE WORKS | 5 | 2020–2021 |
Locations
| Location | Patents | Span |
|---|---|---|
| Brookfield, WI, US | 49 | 1994–2012 |
| Scottsdale, AZ, US | 9 | 2018–2021 |
| Fountain Hills, AZ, US | 8 | 2012–2018 |
| Greenfield, WI, US | 5 | 1988–1996 |