Inventor
John E. Tschirky
Inventor
Long Beach, CA, US
Overview
Patents· 18 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling50%
F01CRotary-piston or oscillating-piston machines or engines11%
F16CShafts11%
Y10TTechnical subjects covered by former us classification8%
F16JPistons6%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%
F03CPositive-displacement engines driven by liquids3%
F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids3%
F16KValves3%
PatentTitleYear
4,562,853'Downhole fire control'19864,386,666'In-hole motor drill with locking bit clutch'19834,329,127'Sealed bearing means for in hole motors'19824,220,380'Bearing assembly'19804,213,508'Downhole fire control'19804,133,397'Drilling with multiple in-hole motors'19794,133,396'Drilling and casing landing apparatus and method'19794,117,895'Apparatus and method for enlarging underground arcuate bore holes'19784,098,561'Sealed bearings'19784,029,368'Radial bearings'19773,999,901'Progressive cavity transducer'19763,989,114'Circulation sub for in-hole hydraulic motors'19763,982,858'Segmented stator for progressive cavity transducer'19763,982,797'Spring-loaded bearings for in-hole motors'19763,982,859'Floating flow restrictors for fluid motors'19763,975,121'Wafer elements for progressing cavity stators'19763,975,120'Wafer elements for progressing cavity stators'19763,936,247'Floating flow restrictors for fluid motors'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1986Patents assigned to SMITH INTERNATIONAL (15)· patent assignee history
1976Patents assigned to SMITH INTERNATIONAL CORP INC (3)· patent assignee history
1976–1986Based in Long Beach, CA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SMITH INTERNATIONAL | 15 | 1976–1986 |
| SMITH INTERNATIONAL CORP INC | 3 | 1976 |
Locations
| Location | Patents | Span |
|---|---|---|
| Long Beach, California, US | 18 | 1976–1986 |