Corner grouting nozzle

A nozzle utilized to grout or fill cold joints and cracks formed in or occuring at structural corners. The nozzle includes a tip which is defined by converging planar surfaces about an axial opening. The nozzle tip defining surfaces include a relatively large area which is separated from the nozzle axial opening for wall contact to permit the nozzle to be secured by an adhesive or bonding agent to the corner walls before injection of the grouting material or sealant.

SUMMARY OF THE INVENTION 
This invention relates to a grouting nozzle and will have special 
application to a nozzle for grouting structural corners. 
U.S. Pat. No. 4,509,884 discloses a nozzle for injecting adhesive materials 
into cracks in concrete, mortared joints in brick or stone walls, timber 
or similar materials. 
The corner grouting nozzle of this invention includes a nozzle having a 
V-shaped tip defined by converging planar surface areas about an exit 
opening in an axial bore. The nozzle surface material about the opening is 
of minimal thickness relative to the overall transverse dimensions of the 
nozzle as to minimize backpressure of sealant or adhesive. Each of the 
coverging nozzle tip-defining faces also includes a relatively large 
surface area which is separated from the nozzle exit opening and which 
permits the nozzle to be secured by a bonding agent to the corner walls 
before injection of a sealant or adhesive. 
Accordingly, it is an object of this invention to provide a corner grouting 
nozzle which is used to grout or fill cold joints, cracks, and similar 
voids between intersecting structural members. 
Another object of this invention is to provide a corner grouting nozzle 
which will minimize back pressure of sealant or adhesive. 
Other objects of this invention will become apparent upon a reading of the 
following description.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
The preferred embodiment herein described is not intended to be exhaustive 
or to limit the invention to the precise form disclosed. It is chosen and 
described to explain the principles of the invention and its application 
and practical use to enable others skilled in the art to utilize the 
invention. 
FIGS. 1-4 depict a corner grouting nozzle 10 which includes a proximal end 
11, a shank 12 and a distal end or head 13. Nozzle 10 includes an axial 
bore 22 which extends through shank 12 from proximal end 11 to head 13. 
Thus far, described nozzle 10 is of the same design as that disclosed in 
U.S. Pat. No. 4,509,884 which is incorporated herein by reference. 
Head 13 of nozzle 10 includes a V-shaped tip 16 defined by two right 
angular converging planar surfaces 18 which are symmetrically oriented 
about axial opening 20 of bore 22 and which intersect a collar 14 forming 
a part of head 13. Each surface 18 includes a narrow section 18' at nozzle 
bore opening 20 and a wide section 18" at collar 14. 
Nozzle 10 is utilized as follows. First, an adhesive or bonding agent is 
applied to surfaces 18 of its tip 16. Nozzle head 13 is then positioned 
with its tip 16 fitting complementally into corner 23 of adjoining walls 
25 overlying crack 28. The adhesive applied to the nozzle tip 16, 
especially at surfaces 18", causes the nozzle to adhere to walls 25. A 
bonding gel coat 24 is then applied over crack 28 in corner 23 and about 
the back side 26 of nozzle collar 14 to firmly bond the nozzle to walls 25 
at corner 23 and complete the seal at crack 28, as seen in FIG. 5. The 
proximal end 11 of the nozzle 10 is then connected by a conventional 
coupling to a source of sealant. An epoxy, adhesive or sealant is pumped 
through axial bore 22 of nozzle 10 and injected into crack 28 in corner 
23. This injection of the material may occur at pressures as high as 
300-400 psi. The narrowness of converging planar surfaces 18' of nozzle 
tip 16 adjacent to corner 23 minimize blow-back of the nozzle during 
injection. Once the crack 28 is filled, a clamp (not shown) is used to 
crimp the shank 12 of the nozzle 10 which prevents the escape of the epoxy 
from the crack 28. The sealant source coupling is then disconnected from 
nozzle 10. After the epoxy cures, the protruding end of the nozzle may be 
cut off generally flush with the corner, left in place, or removed by 
chipping. 
It is understood that the invention is not limited to the above given 
details, but may be modified within the scope of the appended claims.