Ammunition and explosives – Igniting devices and systems – Initiating devices
Reexamination Certificate
2001-10-11
2003-06-24
Nelson, Peter A. (Department: 3641)
Ammunition and explosives
Igniting devices and systems
Initiating devices
C102S275600
Reexamination Certificate
active
06581519
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a blasting cap initiator system and more particularly pertains to initiating a shot shell primer and then a shock tube which in turn activates a blasting cap in a safe and efficient manner.
2. Description of the Prior Art
The use of shock tube activators of known designs and configurations is known in the prior art. More specifically, shock tube activators of known designs and configurations previously devised and utilized for the purpose of initiating blasting caps through known methods and apparatuses are known to consist basically of familiar, expected, and obvious structural configurations, notwithstanding the myriad of designs encompassed by the crowded prior art which has been developed for the fulfillment of countless objectives and requirements.
By way of example, U.S. Pat. No. 3,657,958 to Welles discloses a safe-armed explosive initiation device. U.S. Pat. No. 4,381,711 to Lawrence discloses a hand-held shot tube detonator. U.S. Pat. No. 4,479,436 to Wilson discloses a device for igniting safety fuse. U.S. Pat. No. 4,911,251 to George et al. discloses a method and apparatus for actuating a tubing conveyed perforating gun. U.S. Pat. No. 4,962,708 to Snyder et al. discloses an electric
on-electric initiation system. U.S. Pat. No. 5,327,835 to Adams et al. discloses a detonation device including coupling means. U.S. Pat. No. 5,365,851 to Shaw discloses an initator device. U.S. Pat. No. 5,615,911 to Amano discloses a mechanical ignition sensor. Finally, U.S. Pat. No. 5,415,099 to Kitazawa et al. discloses a mechanical ignition sensor.
While these devices fulfill their respective, particular objectives and requirements, the aforementioned patents do not describe a blasting cap initiator system that allows initiating a shot shell primer and then a shock tube which in turn activates a blasting cap in a safe and efficient manner.
In this respect, the blasting cap initiator system according to the present invention substantially departs from the conventional concepts and designs of the prior art, and in doing so provides an apparatus primarily developed for the purpose of initiating a shot shell primer and then a shock tube which in turn activates a blasting cap in a safe and efficient manner.
Therefore, it can be appreciated that there exists a continuing need for a new and improved blasting cap initiator system which can be used for initiating a shot shell primer and then a shock tube which in turn activates a blasting cap in a safe and efficient manner. In this regard, the present invention substantially fulfills this need.
SUMMARY OF THE INVENTION
In view of the foregoing disadvantages inherent in the known types of shock tube activators of known designs and configurations now present in the prior art, the present invention provides an improved blasting cap initiator system. As such, the general purpose of the present invention, which will be described subsequently in greater detail, is to provide a new and improved blasting cap initiator system and method which has all the advantages of the prior art and none of the disadvantages.
To attain this, the present invention essentially comprises a main housing. The main housing has an imperforate lower wall, parallel side walls, and a front wall and a rear wall. An L-shaped locking slot is formed centrally in each side wall adjacent the rear wall. A pair of cylindrical bores extend from the rear wall through the front wall. Safety apertures are formed in the side wall adjacent to the front wall. The main housing also has trigger recesses. Next provided is a pair of cylindrical firing pins. The firing pins are mounted for independent reciprocal movement within the bores between a retracted orientation adjacent to the rear wall. The firing pins are formed with a centrally located circumferential groove and a forwardly extending point. A pair of triggers is next provided. The triggers are pivotably mounted in the trigger recesses and are independently movable to a locking orientation flat with the upper surface. The triggers have a finger engageable with an associated groove for retaining the firing pin in a retracted orientation. The triggers are independently movable to a raised orientation to a disengaged orientation to allow the forward movement of the firing pins. Next provided is a pair of axial coil springs. The axial coil springs are between the rear wall and the firing pins. The axial coil springs independently allow the advancement of the firing pins. A pair of radial coil springs is next provided. The radial coil springs urge the triggers to the locking orientation. Further provided is a forward block. The forward block has a rearward wall positionable in contact with the front wall of the main housing. Apertures are aligned with the bores. The forward block has a recess with a retention member and a coupling thumb screw supporting a pair of ignitor tubes adjacent to the front wall of the housing. Next provided is a radial cocking knob. The radial cocking knob is coupled to each trigger and functions to allow a user to independently withdraw a firing pin to a retracted position and is rotated within an L-shaped locking slot prior to locking by a trigger. Two sleeves are next provided. The sleeves span the housing and the forward block. The sleeves receive a shot shell primer for being initiated by the firing pin point and then the shock tube and finally a remote blasting cap. Further provided is a locking safety rod. The locking safety rod is positionable through safety apertures of the housing. Lastly, an elongated rod is provided. The elongated rod extends through the length of the housing and is threadedly received by the forward block for the removal of a spent shot shell primer and the introduction of a new shot shell primer.
There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood and in order that the present contribution to the art may be better appreciated. There are, of course, additional features of the invention that will be described hereinafter and which will form the subject matter of the claims attached.
In this respect, before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of descriptions and should not be regarded as limiting.
As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention.
It is therefore an object of the present invention to provide a new and improved blasting cap initiator system which has all of the advantages of the prior art shock tube activators of known designs and configurations and none of the disadvantages.
It is another object of the present invention to provide a new and improved blasting cap initiator system which may be easily and efficiently manufactured and marketed.
It is further object of the present invention to provide a new and improved blasting cap initiator system which is of durable and reliable constructions.
An even further object of the present invention is to provide a new and improved blasting cap initiator system which is susceptible of a low cost of manufacture with regard to both materials and labor, and which accordingly is then susceptible
Dutkiewicz Edward P.
Nelson Peter A.
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