Steerable ground piercing tools
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 20, 2013
Grant Date -
Jan 3, 2013
app pub date -
Sep 4, 2012
filing date -
Jul 30, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A steerable ground piercing tool includes an elongated outer housing having a lengthwise extending bore and an inner assembly at least in part disposed within the outer housing. The inner assembly includes a rotatable chisel having a longitudinally extending shaft at least in part disposed within the housing bore. The chisel has a first end defining an asymmetric tip and a second end defining a first impact surface for receiving a reciprocating action impact to drive the tool through the ground. The inner assembly further includes a conversion mechanism to selectively convert upon activation thereof at least a first portion of the reciprocating action imparted to the first impact surface into combined reciprocation and rotation of the tool.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2012 Application Filing Year
- E21B Class
- 2968 Applications Filed
- 2659 Patents Issued To-Date
- 89.59 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- E21B Class
- 3.49 % this patent is cited more than
- 12 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 20, 2025 |
