Ralph S Moore

US Patent:

6868845, Mar 22, 2005

Filed:

Nov 7, 2003

Appl. No.:

10/704100

Inventors:

Ralph J. Moore - Houston TX, US

International Classification:

F41B005/12

US Classification:

124 25

Abstract:

An improved automatic loading cross-bow comprising a main frame having pivotally mounted interchangeable bow limbs adjacent to its front end. The bow limbs can be latched in a folding position, for easy transportation, in an extended position for firing, or can be interchanged for different bow weights. The cross-bow includes an arrow magazine containing a plurality of arrows adapted to be attached to the main frame. An improved spring device automatically feeds arrows, one at a time, into the firing position in the main frame as the bow string is cocked. An improved safety release trigger is adapted to be cocked by moving the bow string into firing position and to be fired only when the safety release and trigger are both actuated. The improved release trigger further provides for a smooth center line firing.

US Patent:

51844958, Feb 9, 1993

Filed:

Dec 3, 1991

Appl. No.:

7/801969

Inventors:

William G. Chunn - Willis TX
Ralph T. Moore - Houston TX

Assignee:

Prideco, Inc. - Houston TX

International Classification:

B21D 4102

US Classification:

72318

Abstract:

A method is disclosed of externally and internally upsetting the end of a steel tube to provide a thicker wall for welding to a tool joint and for providing an internal tapered section having a projected length (Miu) along the longitudinal axis of the tube that substantially exceeds today's API standard upset. The method includes three upsetting steps, one pressing step, and one reheating step after the first two steps of the method.