IT8819706A0 - SOIL DRILLING BIT WITH RIGID FRONT SEAL ASSEMBLY AND TWO-PIECE SUPPORT. - Google Patents
SOIL DRILLING BIT WITH RIGID FRONT SEAL ASSEMBLY AND TWO-PIECE SUPPORT.Info
- Publication number
- IT8819706A0 IT8819706A0 IT8819706A IT1970688A IT8819706A0 IT 8819706 A0 IT8819706 A0 IT 8819706A0 IT 8819706 A IT8819706 A IT 8819706A IT 1970688 A IT1970688 A IT 1970688A IT 8819706 A0 IT8819706 A0 IT 8819706A0
- Authority
- IT
- Italy
- Prior art keywords
- seal assembly
- piece support
- drilling bit
- front seal
- rigid front
- Prior art date
Links
- 239000002689 soil Substances 0.000 title 1
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/023,170 US4753303A (en) | 1983-10-17 | 1987-03-09 | Earth boring bit with two piece bearing and rigid face seal assembly |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8819706A0 true IT8819706A0 (en) | 1988-03-09 |
IT1216038B IT1216038B (en) | 1990-02-22 |
Family
ID=21813499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT8819706A IT1216038B (en) | 1987-03-09 | 1988-03-09 | Earth boring bit with two piece bearing and rigid face seal assembly |
Country Status (3)
Country | Link |
---|---|
CA (1) | CA1292220C (en) |
IT (1) | IT1216038B (en) |
MX (1) | MX166269B (en) |
-
1988
- 1988-02-18 CA CA000559193A patent/CA1292220C/en not_active Expired - Fee Related
- 1988-03-09 MX MX1070188A patent/MX166269B/en unknown
- 1988-03-09 IT IT8819706A patent/IT1216038B/en active
Also Published As
Publication number | Publication date |
---|---|
CA1292220C (en) | 1991-11-19 |
IT1216038B (en) | 1990-02-22 |
MX166269B (en) | 1992-12-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19980327 |