Injector nozzle retriever and insertion apparatus

Claim 3

The invention of claim 1 including a valve means having an open position permitting passage of the nozzle assembly and said piston means therethrough, said valve means being found between said chamber means and the supportive receptacle.

Claim 4

The invention of claim 1 for use with a cylindrical elongate nozzle, and including: a. an alignment pin means protruding adjacent to the path of movement of said elongate nozzle assembly; and, b. shoulder means on the nozzle assembly for coacting with said pin means, said shoulder means extending at least partly around the circumference of the nozzle assembly such that relative movement of the nozzle assembly with respect to said pin means rotates the nozzle assembly to a desired attitude with respect to the receptacle.

Claim 5

The invention of claim 1 wherein the receptacle includes the improvement of a removable radially directed pin means for locking the nozzle assembly in position in the receptacle.

Claim 6

The invention of claim 1 including: a. a vaLve and supply line connected to one end of said chamber means; b. a second valve and line connected to the second end of said chamber means; c. seal means carried on said piston means for preventing leakage under pressure along said piston means; d. third valve means for bleeding fluid from one end of said chamber means; e. fourth valve means connected to the second end of said chamber means for connection and axial alignment with the receptacle opening and being further aligned with the elongate nozzle assembly; f. grappling means carried on the forward end of said piston means; g. means for coacting with said grappling means found on the portion of the nozzle assembly exposed at the opening of the receptacle; h. said piston means moving toward said fourth valve means on opening said valve, said second valve permitting reduction of pressure ahead of said piston means as it moves in said chamber means; and, i. said fourth valve means permitting said piston means to pass therethrough to bring said grappling means into contact with said coacting means, and thereafter permitting movement of said piston means and the nozzle assembly as a unit back through said fourth valve means in response to a pressure differential across said piston means, which differential is at least partially controlled by manipulation of said third valve means.

Claim 7

The invention of claim 1 including a control means which incorporates: a. first valve means; b. second valve means; c. third valve means; d. a supply line communicated through said first valve means with a suitable source of pressure fluid and connected to one end of said chamber means; e. a line connected through said second valve means and communicated with the other of the ends of said chamber means; f. said third valve means connected with the supply line and vented from said supply line for the purpose of dropping the pressure in said supply line, a pressure gauge indicative of pressure in said supply line; and, g. a pressure gauge indicative of the pressure in the line.

Claim 8

The invention of claim 1 wherein said piston means includes: a. first and second seal means, one of said seal means facing forwardly of said piston means and the other facing rearwardly whereby the two seal means cooperatively seal against pressure leakage past the piston means in said chamber means on both forward and rearward movement of said piston means; and, b. a plurality of at least two fingers extending forwardly of said piston means and being flexible for movement radially inwardly and outwardly and having a protruding partially encircling lip on the exterior thereof near the forward end thereof.

Claim 9

The invention of claim 1 wherein said nozzle assembly includes an elongate cylindrical structure having an opening means at the rear thereof, said opening means having an undercut portion which is of greater diameter than the opening thereof for the purpose of engaging and connecting with a grappling means carried on said piston means.

Claim 10

The invention of claim 1 wherein said piston means includes: a. an elongate body; b. first seal means carried on said elongate body; c. second seal means carried on said elongate body; d. said first and second seal means cooperatively sealing against the wall of said chamber means against leakage past said piston means during forward and rearward movement of said piston means in said chamber means; and, e. said elongate body supporting a forwardly extending grappling means which includes at least a pair of fingers which are springingly movable into an opening, a portion of which is smaller in diameter than said pair of fingers.

Claim 11

The invention of claim 1 wherein said chamber means includes: a. a closure plug at one end; b. a threaded connective means at the other end, said means and said end being open axially; c. an internal wall sealingly contacted against said piston means and exteNding from one end to said other end; d. an inlet port at said one end; e. an additional port near said other end; and, f. said means for introducing pressure fluid utilizing said port and said additional port.