Patent ID: 7010879

Claim:
In a grenade launcher including a receiver structured for attachment to a service firearm, a barrel depending from said receiver, a breech at the rear of said barrel and a hand-grip enclosing at least a portion of said barrel, the improvement characterized by a trigger assembly comprising in combination: a frame depending from said receiver proximal of said breech and defined by a forward vertical portion, a rearward vertical portion and a central cavity therebetween, left and right cover-plates removeably fitted to said frame, a trigger guard depending from said frame and fitted with a trigger pivot, a trigger defined by an upper end and a lower end with said lower end pivoted on said trigger pivot and configured at its upper end with a cocking notch and a ledge that extends integrally and proximally from said cocking notch, a trigger spring fitted between said trigger and said frame to bias said upper end of said trigger toward said forward vertical portion of said frame, a hammer defined by an upper end and a lower end, said upper end being pivoted to said frame with a lever-arm extending integrally and upwardly thereof and said lower end being configured with a vertical recess, a spring plunger carried in a bore in said receiver to engage said lever arm to bias said lower end of said hammer toward said breech, a link of triangular shape defined by a major leg, a first minor leg, a second minor leg and a link nose at the junction of said major and first minor legs, said link being pivoted to said hammer within said vertical recess for limited rotation in a vertical plane, a link spring carried on said lower end of said hammer to urge said link nose downward by rotation of said link, and a firing pin reciprocally carried in said forward vertical portion of said frame to be impacted for firing of said grenade launcher by said lower end of said hammer.