| US 7,413,258 B2 | ||
| Hollow pick shank | ||
| David R. Hall, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); Ronald Crockett, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); Scott Dahlgren, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US); and Jeff Jepson, 2185 S. Larsen Pkwy., Provo, Utah 84606 (US) | ||
| Filed on Oct. 12, 2007, as Appl. No. 11/871,759. | ||
| Application 11/871759 is a continuation of application No. 11/871722, filed on Oct. 12, 2007. | ||
| Application 11/871722 is a continuation in part of application No. 11/844586, filed on Aug. 24, 2007. | ||
| Application 11/844586 is a continuation in part of application No. 11/829761, filed on Jul. 27, 2007. | ||
| Application 11/829761 is a continuation in part of application No. 11/773271, filed on Jul. 03, 2007. | ||
| Application 11/773271 is a continuation in part of application No. 11/766903, filed on Jun. 22, 2007. | ||
| Application 11/766903 is a continuation of application No. 11/766865, filed on Jun. 22, 2007. | ||
| Application 11/766865 is a continuation in part of application No. 11/742304, filed on Apr. 30, 2007. | ||
| Application 11/742304 is a continuation of application No. 11/742261, filed on Apr. 30, 2007. | ||
| Application 11/742261 is a continuation in part of application No. 11/464008, filed on Aug. 11, 2006, granted, now 7,338,135. | ||
| Application 11/464008 is a continuation in part of application No. 11/463998, filed on Aug. 11, 2006. | ||
| Application 11/463998 is a continuation in part of application No. 11/463990, filed on Aug. 11, 2006, granted, now 7,320,505. | ||
| Application 11/463990 is a continuation in part of application No. 11/463975, filed on Aug. 11, 2006. | ||
| Application 11/463975 is a continuation in part of application No. 11/463962, filed on Aug. 11, 2006. | ||
| Application 11/463962 is a continuation in part of application No. 11/463953, filed on Aug. 11, 2006. | ||
| Application 11/463962 is a continuation in part of application No. 11/829761. | ||
| Application 11/829761 is a continuation in part of application No. 11/695672, filed on Apr. 03, 2007. | ||
| Application 11/695672 is a continuation in part of application No. 11/686831, filed on Mar. 15, 2007. | ||
| Prior Publication US 2008/0036281 A1, Feb. 14, 2008 | ||
| Int. Cl. E21C 35/18 (2006.01) | ||
| U.S. Cl. 299—111 | 18 Claims |
| 1. A degradation assembly, comprising:
a holder attached to a driving mechanism and comprising a longitudinal central bore having an opening at a distal end firm
the driving mechanism;
a pick comprising a bolster intermediate a shank and an impact tip;
the shank comprising an outer diameter and first and second ends, the second end being disposed in the central bore of the
holder;
a first seal and a second seal being respectively disposed proximate the first and second ends of the shank; and
an enclosed region disposed intermediate the first and second seals and disposed intermediate the pick and the holder; and
wherein the enclosed region is in fluid communication with a pressurized lubricant reservoir
wherein a lubricant from the reservoir enters an enclosed region through a passage opening disposed intermediate the first
and second seals and the passage opening connects the enclosed region to a hollow portion of the shank.
|