Patent ID: 8413586

Claim:
A grenade round particularly adapted for breaching a door having an outer side and an inner side while minimizing the production of flying debris on said inner side of said door, comprising: a. a low pressure case containing a propulsion system; b. a projectile mated to said low pressure case; c. said projectile having a forward end and an aft end; d. said projectile including an explosive charge; e. said projectile including an ogive proximate said forward end, with said ogive having a forward extreme, f. said ogive containing a fuse assembly configured to detonate said explosive charge upon experiencing a significant deceleration; g. wherein said projectile has a central axis; h. a standoff device attached to said forward end of said ogive and extending forward therefrom along said central axis said standoff device including i. a base, attached to said ogive proximate said forward extreme, said base having a hole aligned with said central axis of said projectile, ii. a tube having a hollow interior inserted in said hole in said base, said hollow tube having a forward end and an aft end, with said aft end being in contact with said ogive, iii. a contactor, having a forward end and an aft tip, said contactor being placed within said hollow interior of said tube, said forward end of said contactor extending forward of said tube and said aft tip of said contactor being positioned proximate said forward extreme of said ogive, and iv. a mechanical interlock between said contactor and said tube, with said mechanical interlock being configured to resist sliding movement between said contactor and said tube until it is overcome by a striking force on said forward end of said contactor, after which said mechanical interlock allows said contactor to slide aft within said tube.