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A turf aerator consisting of a cast concrete roller having an axis of rotation, and having an annular surface displaced radially away from the axis of rotation; first and second radial arrays of tubular tines, each tine among the radial arrays having inner and outer ends, and having soil input and s

A turf aerator consisting of a cast concrete roller having an axis of rotation, and having an annular surface displaced radially away from the axis of rotation; first and second radial arrays of tubular tines, each tine among the radial arrays having inner and outer ends, and having soil input and soil output ports; and mounting lug and tine receiving channel combinations attaching the radial arrays of tubular tines to opposite ends of the concrete roller so that the outer ends of such tines extend outwardly from the annular surface of the roller, and so that the inner ends of the tines extend inwardly from the annular surface.

대표청구항 ▼

A turf aerator consisting of a cast concrete roller having an axis of rotation, and having an annular surface displaced radially away from the axis of rotation; first and second radial arrays of tubular tines, each tine among the radial arrays having inner and outer ends, and having soil input and s

A turf aerator consisting of a cast concrete roller having an axis of rotation, and having an annular surface displaced radially away from the axis of rotation; first and second radial arrays of tubular tines, each tine among the radial arrays having inner and outer ends, and having soil input and soil output ports; and mounting lug and tine receiving channel combinations attaching the radial arrays of tubular tines to opposite ends of the concrete roller so that the outer ends of such tines extend outwardly from the annular surface of the roller, and so that the inner ends of the tines extend inwardly from the annular surface. he second explosive carrying member such that the first and second explosive carrying members are rotatable and angularly displaceable relative to one another; a first explosive device disposed in the first explosive cavity; and a second explosive device disposed in the second explosive cavity and spaced from the first explosive device such that when one of the first and second explosive devices is initiated, the other of the first and second explosive devices will in turn be initiated. 2. The bi-directional explosive transfer subassembly as recited in claim 1 wherein the first explosive device further includes a first shaped charge and the second explosive device further includes a second shaped charge and wherein the first and second shaped charges face one another and are each adapted for sending an explosive jet toward the other shaped charge, thereby providing an explosive transfer therebetween. 3. The bi-directional explosive transfer subassembly as recited in claim 1 wherein the first and second explosive cavities are separated by portions of the first and second explosive carrying members. 4. The bi-directional explosive transfer subassembly as recited in claim 1 wherein the first explosive carrying member further comprises a first wall portion and the second explosive carrying member further comprises a second wall portion that is adjacent to the first wall portion, thereby separating the first and second explosive cavities. 5. The bi-directional explosive transfer subassembly as recited in claim 1 wherein each of the first and second explosive devices further comprises a booster, a length of detonating cord connected to the booster and a detonating cord initiator connected to the detonating cord. 6. The bi-directional explosive transfer subassembly as recited in claim 1 wherein the first explosive carrying member further includes a cylindrical portion extending integrally from the ball end and wherein the second explosive carrying member has a flange portion extending from the socket, the flange portion having a conically shaped inner surface having an angle relative to a longitudinal axis of the second explosive carrying member that defines the maximum angular displacement between the first and second explosive carrying members when the cylindrical portion of the first explosive carrying member contacts the flange portion of the second explosive carrying member. 7. The bi-directional explosive transfer subassembly as recited in claim 1 wherein the maximum angular displacement between the first and second explosive carrying members is between about 1 and about 10 degrees. 8. The bi-directional explosive transfer subassembly as recited in claim 1 wherein the maximum angular displacement between the first and second explosive carrying members is about 5 degrees. 9. A bi-directional explosive transfer subassembly for coupling two explosive tools comprising: a first explosive carrying member having a ball end and a first explosive cavity that extends into the ball end; a second explosive carrying member having a socket and a second explosive cavity, the ball end of the first explosive carrying member slidingly received in the socket of the second explosive carrying member such that the first and second explosive carrying members are rotatable and angularly displaceable relative to one another; a first explosive device including a first shaped charge disposed in the ball end of the first explosive cavity; and a second explosive device including a second shaped charge disposed in the second explosive cavity and spaced from the first explosive device wherein the first and second shaped charges face one another and are each adapted for sending an explosive jet toward the other shaped charge, thereby providing an explosive transfer therebetween. 10. The bi-directional explosive transfer subassembly as recited in claim 9 wherein the first and second explosive cavities are separated by portions of the first and seco