Union nut with lock member

1. A union nut for connecting an end of a threaded pipe having exterior threading to an end of a flanged pipe having an exterior flange; said union nut including:

a generally cylindrical body having a longitudinal axis; including:

a body wall; including:

a thread retaining end for attaching to the exterior threading of the end of the threaded pipe; said thread retaining end including:

an outer surface:

an inner surface including:

 threads adapted for mounting upon the threading of the threaded pipe;

a flange retaining end; including:

a partial collar projecting radially inward beyond said inner surface and defining an aperture for receiving the flange of the flanged pipe such that said partial collar partially retains the received flange within said body;

first cooperative detent means; and

first cooperative alignment means; and

a lock member including:

second cooperative detent means; and

second cooperative alignment means;

said lock member adapted to be removably engaged with said body such that, when engaged, said lock member and said partial collar cooperate to fully retain the received flange; and said first and second cooperative detent means adapted to cooperate when lock member is engaged with said collar so as to prevent casual disengagement of said flange retaining end and said lock member; and

said first and second cooperative alignment means adapted to cooperate to align said lock member with said flange retaining end such that said lock member engages with said flange retaining end by sliding in a direction perpendicular to said longitudinal axis and resists disengagement by forces not perpendicular to said axis.

2. In combination:

a flanged pipe; including:

an unattached end; and

a pipe flange extending radially outward from said unattached end;

a threaded pipe; including:

an unattached end; including:

an exterior surface; including:

pipe threading; and

a union nut connecting said flanged pipe to said threaded pipe; including:

a generally cylindrical body defining an inner bore having a longitudinal axis; said body including:

a thread retaining end; including:

an outer surface;

an inner surface including:

 thread mount means mounted upon said pipe threading;

a flange retaining end; and

a flange lock member adapted to be removably engaged with said body such that, when engaged, said flange lock member and said flange retaining end cooperate to fully retain said received pipe flange within said inner bore and to be able to maintain said received pipe flange in connection with said threaded pipe and wherein said lock member engages with said flange retaining end by sliding in a direction perpendicular to said longitudinal axis of said inner bore.

3. The combination of claim 2 , further including:

a gasket disposed between said pipe flange and said unattached end of said threaded pipe.

4. The combination of claim 2 , said thread mount means comprising:

nut threads adapted to mate with said pipe threading.

5. A union nut for connecting an end of a threaded pipe having exterior threading to an end of a flanged pipe having an exterior flange; said union nut including:

a generally cylindrical body having a longitudinal axis; including:

a body wall; including:

a thread retaining end for attaching to the exterior threading of the end of the threaded pipe; said thread retaining end including:

an outer surface;

an inner surface including:

 threads adapted for mounting upon the threading of the threaded pipe;

a flange retaining end; including:

a partial collar projecting radially inward beyond said inner surface and defining an aperture for receiving the flange of the flanged pipe such that said partial collar partially retains the received flange within said body; and

first cooperative alignment means; and

a lock member adapted to be removably engaged with said body such that, when engaged, said lock member and said partial collar cooperate to fully retain the received flange; including:

second cooperative alignment means; said first and second cooperative alignment means adapted to cooperate to align said lock member with said flange retaining end such that said lock member engages with said flange retaining end by sliding in a direction perpendicular to said longitudinal axis and resists disengagement by forces not perpendicular to said axis.

6. The union nut of claim 5 , wherein said lock member and said partial collar combine to form a circular collar for retaining the received flange, and having an inner diameter equal or greater than the inner diameter of the received flange.

7. In combination:

a flanged pipe; including:

an unattached end; including

a pipe flange;

a threaded pipe; including:

an unattached end; including:

an exterior surface; including:

pipe threading; and

a union nut connecting said flanged pipe to said threaded pipe; including:

a generally cylindrical body defining an inner bore having a longitudinal axis; said body including:

a thread retaining end; including:

an outer surface;

an inner surface including:

 nut threads mounted upon said pipe threading;

a flange retaining end; including:

a partial collar projecting radially inward into said inner bore and defining an aperture for receiving said pipe flange such that said partial collar partially retains said received pipe flange within said inner bore; and

first cooperative alignment means

a lock member adapted to be removably engaged with said body, including:

second cooperative alignment means;

said lock member engaged with said body such that said lock member and said partial collar cooperate to fully retain said received pipe flange within said inner bore and be able to maintain said received pipe flange in connection with said threaded pipe; and said first and second cooperative alignment means adapted to cooperate to align said lock member with said flange retaining end such that said lock member engages with said flange retaining end by sliding in a direction perpendicular to said longitudinal axis and resists disengagement by forces not perpendicular to said axis.