Bail extender

- Alpha Dog Oilfield Tools

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Description

FIG. 1 is a perspective view of the first embodiment of a bail extender showing my new design;

FIG. 2 is another perspective view of FIG. 1;

FIG. 3 is a front view of FIG. 1, the rear view being a mirror image;

FIG. 4 is a side view of FIG. 1, the opposing side being a mirror image;

FIG. 5 is a bottom view of FIG. 1; and

FIG. 6 is a top view of FIG. 1.

FIG. 7 is a perspective view of the second embodiment of a bail extender showing my new design;

FIG. 8 is another perspective view of FIG. 7;

FIG. 9 is a front view of FIG. 7, the rear view being a mirror image;

FIG. 10 is a side view of FIG. 7, the opposing side being a mirror image;

FIG. 11 is a bottom view of FIG. 7; and,

FIG. 12 is a top view of FIG. 7.

The claimed bail extender is used to extend the effective length of bails (also called elevator lifts) on a drilling rig.

Claims

The ornamental design for a bail extender, as shown.

Referenced Cited
U.S. Patent Documents
1667779 May 1928 Grady
2242783 May 1941 Grau
3461666 August 1969 Burstall
D263211 March 2, 1982 Brooks
4682687 July 28, 1987 Leege
4793422 December 27, 1988 Krasnov
4800968 January 31, 1989 Shaw et al.
5049104 September 17, 1991 Olsen
D326601 June 2, 1992 Smith
5172534 December 22, 1992 Milner
D336535 June 15, 1993 Maglica
D337172 July 6, 1993 Maglica
D348827 July 19, 1994 Berti
D373947 September 24, 1996 Parduhn
D415217 October 12, 1999 Rudy
6250459 June 26, 2001 Coen
6520709 February 18, 2003 Mosing et al.
D516135 February 28, 2006 Kim
D534417 January 2, 2007 Caruana
D551528 September 25, 2007 Vautour
D616286 May 25, 2010 Foresman
D635445 April 5, 2011 Foresman
D652286 January 17, 2012 Mair
D722864 February 24, 2015 Greenthal
20040129506 July 8, 2004 Ericson
Foreign Patent Documents
0079846 May 1983 EP
Other references
  • Wet Scraper Chain Link—Wet Scraper Chain Link Manufacturer & Supplier, Kolkata, India, image post date unknown, site visited on May 4, 2016 (online), <http://www.conveyorchainsprocket.in/wet-scraper-chain-link-3004351.html>.
  • ALCO, Bail Extensions, http://alcoinc.ca/Products/Oil%20Field/HandlingTools/BailExtension/BailExtension.htm, Internet publication dated Dec. 3, 2014.
  • ALCO, ALCO Elevator Link Connectors, Product Brochure, Aug. 4, 2015, 2 pages, available at http://www.alcoinc.ca/media/20586/ALCO-Elevator-Link-Connectors-Brochure-Reduced.pdf, Internet publication.
Patent History
Patent number: D768471
Type: Grant
Filed: May 13, 2015
Date of Patent: Oct 11, 2016
Assignee: Alpha Dog Oilfield Tools (Laredo, TX)
Inventor: Manuel Marquez (Laredo, TX)
Primary Examiner: Sheryl Lane
Assistant Examiner: Ieisha Price
Application Number: 29/526,882
Classifications
Current U.S. Class: D8/382