Patent Publication Number: US-10766053-B2

Title: Material dispensing system and method

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation-in-part under 35 U.S.C. § 120 based upon co-pending U.S. patent application Ser. No. 15/398,193 filed on Jan. 4, 2017, which is incorporated herein by reference in its entirety. 
    
    
     BACKGROUND 
     Technical Field 
     The present technology relates to a material dispensing system and method for use in connection with controllably dispensing material from a packaging such as, but not limited to, a chub pack and more specifically to methods and apparatuses related to hand-held caulking guns that can pierce a chub pack. 
     Background Description 
     Powered or motorized material dispensing systems are desirable for providing an ergonomic hand-held device controllably dispensing a material with a desired bead size and shape. 
     Powered hand-held material dispensing devices, such as caulking guns, are known in the art and generally rely on the action of a motor to move a piston to push material out of a prefilled tube. The motion of the piston is induced by the advancement of a piston rod in the direction of the caulk tube, with the piston rod being advanced in the direction of travel by the operator&#39;s squeezing of a trigger. 
     Additionally, manually operated caulking guns are known, whereby the piston is moved by squeezing or grasping a handle of the dispensing tool. The handle is typically connected to a rack by way of a ratchet and pawl-type mechanism to incrementally advance the rack and cause the material to be discharged from a tube or cartridge. These known devices are designed to receive and carry a disposable caulk tube. The housing of these caulking guns and the trigger are generally formed of stamped metal plate for manufacturing economy. The caulk tube generally includes a cylindrical tube featuring a sliding piston, and a nozzle tip, with material stored inside the tube. The caulk tube is commonly more expensive to manufacture than a chub pack because of the different structural elements. While a chub pack is considerably less expensive and easier to manufacture since it is a type of container formed by a tube of flexible packaging material. 
     SUMMARY OF THE PRESENT TECHNOLOGY 
     In view of the foregoing disadvantages inherent in the known types of caulking guns now present in the prior art, the present technology provides an improved material dispensing system, and overcomes the above-mentioned disadvantages and drawbacks of the prior art. As such, the general purpose of the present technology, which will be described subsequently in greater detail, is to provide a new and improved material dispensing system and method which has all the advantages of the prior art mentioned heretofore and many novel features that result in a material dispensing system which is not anticipated, rendered obvious, suggested, or even implied by the prior art, either alone or in any combination thereof. 
     According to one aspect of the present technology, the present technology essentially includes a housing having a configuration capable of receiving a packaging containing a material therein. At least one nozzle tip is associated with the housing. The nozzle tip includes at least one piercing projection having a configuration capable of piercing the packaging and allowing the material in the packaging to be dispensed from the nozzle tip. At least one piston rod is at least partially slidably received in the housing, and has a configuration capable of compressing the packaging toward the piercing projection of the nozzle tip. A transmission assembly selectively operably couples an output of a motor and the piston rod for powered translation of the piston rod in at least one of a forward direction and a reverse direction. 
     According to another aspect of the present technology, essentially includes a housing having a configuration capable of receiving a packaging containing a material therein. At least one piston rod is at least partially slidably received in the housing, and has a configuration capable of compressing the packaging. At least one planetary gear operably engageable with an output of a motor and with at least one sun gear. The sun gear is selectively and operably coupled with the piston rod for powered translation of the piston rod in at least one of a forward direction and a reverse direction. A ring gear is configured to receive and operably engageable with the planetary gear. A lock block is moveable to operably engage with the ring gear to prevent the ring gear from rotating. 
     The present technology may also include a piston rod positioning sensing device in operational association with a longitudinal flat first section of the piston rod. There are, of course, additional features of the present technology that will be described hereinafter and which will form the subject matter of the claims attached. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present technology will be better understood and objects other than those set forth above will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein: 
         FIG. 1  is a rear-right perspective view of an embodiment of the material dispensing system constructed in accordance with the principles of the present technology, with the phantom lines depicting environmental structure and forming no part of the claimed present technology. 
         FIG. 2  is a top-right perspective view of the material dispensing system with the cover in the open position, and the nozzle tip and chub pack exploded. 
         FIG. 3  is a cross-sectional view of the material dispensing system, with an enlarged section of the cover release member. 
         FIG. 4  is a cross-sectional view of the nozzle tip assembled in the dispensing unit taken along line  4 - 4  in  FIG. 1 . 
         FIG. 5  is a cross-sectional view of the nozzle tip taken along line  5 - 5  in  FIG. 4 . 
         FIG. 6  is an enlarged cross-sectional view of the nozzle tip piercing the chub pack taken from section  6  in  FIG. 4 . 
         FIG. 7  is a cross-sectional view of the gun housing, the cover and the locking tab taken along line  7 - 7  in  FIG. 1 . 
         FIG. 8  is a cross-sectional perspective view of the locking tab. 
         FIG. 9  is a side plane view of the motorized sealant dispensing system of the present technology. 
         FIG. 10  is a front plane view of the motorized sealant dispensing system of the present technology taken along line  10 - 10  in  FIG. 9 . 
         FIG. 11  is an exploded view of the motorized sealant dispensing system of the present technology. 
         FIG. 12  is cross-sectional view of the handle section, the gear box section and the piston rod taken along line  12 - 12  in  FIG. 9   
         FIG. 13  is cross-sectional view of the motorized sealant dispensing system taken along line  13 - 13  in  FIG. 10 . 
         FIG. 14  is an enlarged exploded view of the gearbox assembly. 
     
    
    
     The same reference numerals refer to the same parts throughout the various figures. 
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular embodiments, procedures, techniques, etc. in order to provide a thorough understanding of the present technology. However, it will be apparent to one skilled in the art that the present technology may be practiced in other embodiments that depart from these specific details. 
     Known powered caulking guns are essentially designed to receive a caulk tube including a sliding piston and nozzle tip. The nozzle tips are integral with the caulk tube and these are commonly more expensive to manufacture than a chub pack because of the different structural elements. These powered caulking guns further may include complex and less effective means for stopping lateral movement of the piston rod, thereby dispensing unwanted material from the caulk tube. 
     While the above-described devices fulfill their respective, particular objectives and requirements, the aforementioned patents do not describe a material dispensing system that allows controllably dispensing material from a chub pack. 
     Therefore, a need exists for a new and improved material dispensing system that can be used for controllably dispensing material from a chub pack. In this regard, the present technology substantially fulfills this need. In this respect, the material dispensing system according to the present technology substantially departs from the conventional concepts and designs of the prior art, and in doing so provide an apparatus primarily developed for the purpose of controllably dispensing material from a chub pack. 
     Technical features described in this application can be used to construct various embodiments of material dispensing system. A housing can be configured to receive a packaging containing a material to be dispensed. The housing can include a motor and transmission assembly configured for powered translation of a piston rod in at least one of a forward direction and a reverse direction. At least one nozzle tip can be associated with the housing, and can include at least one piercing projection capable of piercing the packaging. 
     In some embodiments of the aspects of the present technology, the transmission assembly includes at least one planetary gear operably engageable with at least one sun gear. In some embodiments, the transmission assembly further includes a ring gear receiving and operably engageable with the planetary gear, and a lock block moveable to operably engage with the ring gear to prevent the ring gear from rotating. 
     In some embodiments, the ring gear defines multiple radially arranged notches, and the lock block includes a detent configured to be receivable in at least one of the notches when the lock block is moved in an engagement position upon depression of a trigger. In some embodiments, the trigger includes an extension that is received in a slot defined in the lock block. 
     In some approaches, a gearbox is configured to receive the planetary gear, the sun gear, the ring gear and the lock block. The gearbox defines a channel configured to slidable receive the lock block. 
     In some embodiments of the approach, a gearbox cover is connectable to the gearbox for enclosing at least the planetary gear, the sun gear and the ring gear between the gearbox cover and the gearbox. A portion of the sun gear extends out past the gearbox cover and is operably engageable with a bevel gear exterior of the gearbox and the gearbox cover. The bevel gear is operably engageable with a rack of the piston rod and is configured for converting rotational output of the sun gear to the translational output of the piston rod. 
     In some embodiments, a portion of the sun gear and a first portion of the bevel gear are enclosed within a transmission housing that is connectable to the gearbox cover. A second portion of the bevel gear is exterior of the transmission housing and is operable engageable with the rack of the piston rod. 
     In some embodiments, the sun gear is operably engageable with a bevel gear configured to be operably engageable with a rack of the piston rod and for converting rotational output of the sun gear to the translational output of the piston rod. 
     In some embodiments, the planetary gear and the sun gear is a plurality of successive planetary gear and sun gear stages. An initial planetary gear is operable engageable with the output of the motor, and a final planetary gear is operable engageable with the ring gear. Alternatively in some embodiments, the final planetary gear is operable engageable with a spindle including a bevel pinion gear that is operably engageable with a bevel gear. The bevel gear is operably engageable with a rack of the piston rod and is configured for converting rotational output of the spindle to the translational output of the piston rod. 
     In another approach, a tube is configured to receive the chub pack and a piston associated with the piston rod. The tube is positioned in the housing with one end of the tube adjacent the nozzle tip. 
     In some embodiments, the piston rod includes a longitudinal flat surface slidably engageable with an interior wall of the housing. The longitudinal flat surface or the interior wall is configured to prevent the piston rod from rotating. 
     In some embodiments, the piercing projection further includes a piercing end, and an interior side defining at least one channel in the interior side and along a longitudinal axis of the piercing projection. The channel being in fluid communication with a hollow interior of a dispensing end of the nozzle tip. The piercing projection can further include an exterior side angled from a longitudinal axis of the nozzle tip, and the interior side is parallel with the longitudinal axis of the nozzle tip. 
     There has thus been outlined, rather broadly, features of the present technology 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. 
     Numerous objects, features and advantages of the present technology will be readily apparent to those of ordinary skill in the art upon a reading of the following detailed description, but nonetheless illustrative, embodiments of the present technology when taken in conjunction with the accompanying drawings. 
     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 technology. 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 technology. 
     It is another object of the present technology to provide a new and improved material dispensing system that may be easily and efficiently manufactured and marketed. 
     An even further object of the present technology is to provide a new and improved material dispensing system that has a low cost of manufacture with regard to both materials and labor, and which accordingly is then susceptible of low prices of sale to the consuming public, thereby making such material dispensing system economically available to the buying public. 
     Still another object of the present technology is to provide a material dispensing system for controllably dispensing material from a packaging, such as but not limited to a chub pack or a prefilled tube. This allows for the controlled dispensing of material from the packaging using an interchangeable nozzle tip featuring piercing projections that pierce the packaging thereby allowing the material to be dispensed from the nozzle tip. 
     These together with other objects of the present technology, along with the various features of novelty that characterize the present technology, are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the present technology, its operating advantages and the specific objects attained by its uses, reference should be made to the accompanying drawings and descriptive matter in which there are illustrated embodiments of the present technology. 
     Referring now to the drawings, and particularly to  FIGS. 1-14 , an embodiment of the material dispensing system of the present technology is shown and generally designated by the reference numerals  10 ,  100 . 
     In  FIG. 1 , a new and improved material dispensing system  10  of the present technology for controllably dispensing material from a packaging such as a chub pack is illustrated and will be described. More particularly, the material dispensing system  10  can have a dispensing unit  12 , a cover  40  pivotably connected to the dispensing unit  12  via a hinge  42 , and a packaging compression assembly capable of compressing the packaging toward a nozzle tip  70 . 
     For exemplary purposes, the dispensing unit  12  can have a configuration similar to a gun featuring a main housing  14 , a hand grip  18 , a trigger  20 , a piston grip  22 , and a piston rod  24 . It can be appreciated that the main housing  14  can be in the form without the hand grip  18 , the trigger  20 , the piston grip  22  or the piston rod  24 . The main housing  14 , the hand grip  18  and the trigger  20  can be made of, but not limited to, plastic, metal, composite, an alloy or any combination thereof. The dispensing unit  12  can be a single molded unit or can be made of separable and attachable sections secured together by, but not limited to, adhesive, welding, fasteners, tabs, locks, clips or other securing means. 
     The main housing  14  or the hand grip  18  can include a recess defined therein which features a configuration capable of receiving a side of the piston grip  22  so as to produce a smooth and flush transition therebetween when the piston grip  22  is received in the recess. 
     With reference to  FIGS. 2 and 3 , the main housing  14  can include a nozzle tip receiving end featuring an opening  16  having a configuration capable of receiving a dispensing end  88  of the nozzle tip  70  therethrough. The main housing  14  further defines an interior space having a configuration capable of receiving a packaging such as a chub pack  2  therein. The nozzle tip  70  can have a configuration capable of receiving an end portion of the chub pack  2 . It can be appreciated that the nozzle tip  70  can be integrally formed with an end of the main housing  14 , thereby creating a single main housing and nozzle tip unit. 
     The main housing  14  further includes an internal skeletal framework including one or more lateral housing ribs  30 , and one or more longitudinal housing spars  32 . The housing ribs  30  are in spaced apart relationship with each other, and extend into the interior space of the main housing  14 . The housing ribs  30  can have an arcuate interior edge of a constant or varying curvature. 
     The piston rod  24  is connected to a piston  26  that is slidably receivable in the interior space of the main housing  14 . The trigger  20 , when operated by a user, can advance the piston rod  24 , which thus advances the piston  26  along a longitudinal axis of the main housing  14  and interior of the housing ribs  30  and housing spars  32 . 
     As best illustrated in  FIG. 3 , it can be appreciated that the trigger  20  is pivotable with the dispensing unit  12  so as to operate a piston rod advancing assembly. The piston rod advancing assembly can include a ratchet pawl  21  pivotably associated with an end portion of the trigger  20 . The ratchet pawl  21  can be biased so as to pivot a ratchet end into and out of engagement with ratchet teeth  25  formed in a side of the piston rod  24 . A locking pawl  23  can be included which is biased so as to pivot a locking end of the locking pawl  23  into and out of engagement with the ratchet teeth  25 . The piston rod  24  can be rotated so as to engage or disengage the ratchet teeth  25  with the ratchet pawl  21  and/or the locking pawl  23 . The trigger  20  can be biased so that an end opposite the ratchet pawl  21  is forced away from the hand grip. 
     It can be appreciated that a gear system, a motor system, an air bladder system or a tongue and roller system can be used in lieu of the above described ratcheting assembly. 
     In use, it can be appreciated that a user can squeeze the trigger  20 , which pushes the ratchet end of the ratchet pawl  21  into engagement with one of the ratchet teeth  25 . Further squeezing of the trigger  20  would advance the piston rod  24  toward the opening  16 . Advancement of the piston rod  24  provides a ratcheting action between the ratchet teeth  25  and the locking pawl  23 , which has a configuration capable of allowing the piston rod  24  to advance toward the opening  16  while preventing retraction of the piston rod  24  unless the ratchet teeth  25  are rotated out of engagement with the ratchet pawl  21  and locking pawl  23 . Release of the trigger  20  will move the ratchet pawl  21  in an opposite direct of advancement for further advancing of the piston rod  24 . 
     The cover  40  further includes an internal skeletal framework including one or more lateral cover ribs  46 , and one or more longitudinal cover spars  48 . The cover ribs  46  are in spaced apart relationship with each other, and extend into an interior space of defined by the cover  40 . The cover ribs  46  can have an arcuate interior edge of a constant or varying curvature. 
     The cover  40  can further include a lifting or release member  44  having a configuration capable of being engaged by a user to disengage a tab  45  from a tab opening  17  defined in a back wall of the main housing  14 . The release member  44  can be a biasing U-shaped member extending from an end of the cover  40 , with the biasing force pushing the tab  45  into engagement with the tab opening  17  when the cover  40  is in the closed position, as best illustrated in the enlarged section of  FIG. 3 . The tab  45  can include an angled surface to assist in closing of the cover  40 , and a ledge for engaging with the tab opening  17 . The ledge has a configuration capable of securing the cover  40  in the closed position. 
     The release member  44  is capable of being moved so that the tab  45  is disengaged from the tab opening  17 , thereby allowing the cover  40  to be opened gaining access to the interior space of the main housing  14 . Lifting the cover  40  by way of the release member  44  pivots the cover  40  away from the main housing  14  via the hinge  42  that is associated with an end of the cover  40  opposite the release member  44 . 
     A locking slide  60  is slidable associated with a cover rail  50  on one or both sides of the cover  40 . The locking slide  60  has a configuration capable of slidably receiving a housing rail  34  extending from the main housing  14  in a locked position. In the locked position, the locking slide  60  receives a portion of both the cover rail  50  and the housing rail  34  so as to prevent the cover  40  from pivoting away from the main housing  14 . The locking slide  60  can slide away from the housing rail  34  in an un-locked position so that the cover  40  can freely pivot away from the main housing  14 . 
     It can be appreciated that a user could insert an end of the chub pack  2  into the opening  74  of the nozzle tip  70 , then insert both the nozzle tip  70  and chub pack  2  into the interior space of the main housing  14  so that the dispensing end  88  of the nozzle tip  70  extend from the opening  16  of the main housing  14 . 
     With reference to  FIGS. 4-6 , the dispensing end  88  of the nozzle tip  70  is received through the opening  16  of the main housing  14 . The nozzle tip  70  includes a receiving end  72  defining an opening  74 , and a ledge  76 . The opening  74  has a configuration capable of receiving an end of the chub pack  2 . The ledge  76  is located opposite the opening  74 , and has a configuration capable of abutting against an edge of the main housing  14  that defines the opening  16 . The ledge  76  prevents the nozzle tip  70  from being pushed through and out the opening  16 . 
     A conical transition section  86  can extend away from the ledge  76  in a converging direction, and the dispensing end  88  can extend from the transition section  86  in a conically converging direction. The receiving end  72 , transition section  86  and the dispensing end  88  all have a hollow interior. It can be appreciated that the dispensing end  88  can feature a closed distal end, which allows a user to cut off a section of the dispensing end  88  to form an opened dispensing end. The open dispensing end can be of any size determined by the location of the cut along the conically shaped dispensing end  88 . 
     The receiving end  72  can include one or more radially arranged internal ribs  78 , and one or more radially arranged piercing projections  80 , as best illustrated in  FIGS. 4 and 5 . The internal ribs  78  extend into the interior of the receiving end  72  and have a generally arcuate or elliptical configuration capable of receiving and supporting an end portion of the chub pack  2 . The internal ribs  78  can further provide structural support for the receiving end  72 , and can further assist in guiding the end of the chub pack  2  toward the piercing projections  80 . 
     It can be appreciated that the piercing projections  80  can be integrally formed with the main housing  14  or with a nozzle tip  70  that is integrally formed with the main housing  14 . 
     As best illustrated in  FIG. 6 , the piercing projections  80  can extend into the interior of the receiving end  72  in a direction from a terminus of the internal ribs  78  toward the opening  74 . The piercing projections  80  can include a piercing end  82 , an exterior side angled from a longitudinal axis of the nozzle tip  70 , and an interior side parallel with the longitudinal axis of the nozzle tip  70 . The piercing end  82  can be angled to create an edge having a configuration capable of piercing the chub pack  2  when sufficient pressure is applied between them. 
     The piercing projections  80  can further include at least one channel  84  defined along a longitudinal axis of the interior side of the piercing projections  80 . The channel  84  of each piercing projections  80  is in communication with the hollow interior of the nozzle tip  70 . Once the chub pack  2  is punctured by the piercing projections  80 , the piercing projections  80  are inserted/received into the interior of the chub pack  2  so that any material in the chub pack  2  is allowed to flow through the channel  84  and into hollow interior of the nozzle tip  70 , and then into the dispensing end  88 . 
     It can be appreciated that after the chub pack  2  is inserted into the receiving end  72 , the nozzle tip  70  and/or the chub pack  2  can be rotated so that the piercing projections  80  puncture the chub pack  2  and consequently remove a section of the chub pack  2  punctured by the piercing projections  80 . It can further be appreciated that the nozzle tip  70  can be of different shapes and sizes, and that it can be provided as a kit including multiple nozzle tips with dispensing ends of different sizes, shapes, lengths and/or configurations. 
     With reference to  FIGS. 6 and 7 , the housing rail  34  can be a flanged edge offset from a side of the main housing  14  to define a housing notch  36  therebetween. The cover rail  50  can be a flanged edge offset from a side of the cover  40  to define a cover notch  52  therebetween, with the flanged edge of the cover rail  50  extending in a direction opposite the housing flanged edge when the cover  40  is in the closed position. The locking slide  60  generally has a C-channel configuration with flanged sides  62  extending toward each other to define a slot  64  therebetween. The C-channel configuration of the locking slide  60  is capable of receiving the housing flanged edge and the cover flanged edge so that the locking slide  60  can slide along both the housing rail  34  and the cover rail  50  when the cover  40  is in the closed position. The housing notch  36  and the cover notch  52  have a configuration capable of slidably receiving the flanged sides  62  of the locking slide  60 , respectively. 
     The cover rail  50  can further include stop edges located at both ends of the cover rail  50 , with the stop edges having a configuration capable of preventing the locking slide  60  from being removed from the cover rail  50 . 
     The locking slide  60 , the housing rail  34  and the cover rail  50  each have a length. The length of the housing rail  34  is less than the length of the cover rail  50  by at least a distance of the length of the locking slide  60 . This is to allow the locking slide  60  to slide out past the housing rail  34  so that the cover  40  can be opened. 
     Alternatively, it can be appreciated that the length of the housing rail  34  and the length of the cover rail  50  can be switched so that the locking slide  60  is positioned on the housing rail  34 , with the stop edges associated with the housing rail  34 . 
     It can be appreciated that the material dispensing system  10  of the present technology can include draw back system (not shown) to ensure bead flow or flow of the material from the chub pack  2  ceases when the trigger  20  is disengaged. The draw back system can have a configuration capable of drawing back of pressure to avoid unwanted flow of material out the nozzle tip  70 . The draw back system can include, but not limited to: a biasing assembly which is capable of pushing back against a part of the packaging compression assembly or against the chub pack  2 ; a retraction assembly which is capable of retracting at least a portion of the packaging compression assembly or the chub pack  2 ; or a nozzle tip moving assembly which is capable of moving the nozzle tip  70  away from the chub pack  2 . 
     Currently, most ratchet systems will maintain a level of pressure on the chub pack  2  despite while the user is not using the trigger causing spillage. The draw back system could prevent this unwanted pressure against the chub pack thereby preventing spillage of material. 
     It can now be understood that the material dispensing system  10  of the present technology can be used to dispense a material, such as but not limited, caulk, adhesive, sealant, paste, cement and the like, from a chub pack  2 . In exemplary use, a user can install a first end of the chub pack  2  into the opening  74  of the nozzle tip  70 . With the piston  26  fully retracted and the cover  40  lifted in an open position, the assembled nozzle tip  70  and chub pack  2  can then be inserted into the interior space of the main housing  14  so that the dispensing end  88  of the nozzle tip  70  is received through the opening  16  of the main housing  14 . 
     It can be appreciated that the nozzle tip  70  can be inserted into the interior space of the main housing  14  first, and after which the chub pack  2  can be inserted into the interior space of the main housing  14  so that the first end of the chub pack  2  is received through the opening  74  of the nozzle tip  70 . 
     With the nozzle tip  70  and chub pack  2  installed in the interior space of the main housing  14 , the user can then close the cover  40  so that the cover rail  50  is adjacent the housing rail  34 . When the cover  40  is in the closed position, the locking slide  60  can then be slid along the housing rail  34  and the cover rail  50  so that the cover  40  is locked in the closed position and prevented from being pivoted away from the main housing  14 . 
     The user can then operate the trigger  20  to advance the piston rod  24 , which advances the piston  26  toward a second end of the chub pack  2 . The advancement of the piston  26  pushes the first end of the chub pack  2  against the piercing projections  80  so that the piercing end  82  punctures through the first end of the chub pack  2 , thereby opening a passage between the interior of the chub pack  2  and the hollowing interior of the nozzle tip  70 . 
     Continued advancement of the piston  26  against the second end of the chub pack  2  could expand the sidewalls of the chub pack  2 , which would consequently be contained by the housing ribs  30 , the housing spars  32 , the cover ribs  46  and the cover spars  48 . This continued advancement of the piston  26  can force the material out of the chub pack  2  and through the channel  84  of the piercing projections  80 . The material can then be forced through the hollow interior of the nozzle tip  70  and dispensed out an opening defined or cut in the dispensing end  88 . 
     It can be appreciated that when the locking slide  60  is slid over both the housing rail  34  and the cover rail  50 , the locking slide  60  can secure the cover  40  in the closed position and resist the forces acting on the cover  40  by an expanding chub pack  2 . 
     The chub pack  2  can be removed and replaced by griping the piston grip  22  and retracting the piston  26  away from the chub pack  2 . The user can then slide the locking slide  60  away from and past the housing rail  34 , thereby unlocking the cover  40 . The cover  40  can then be pivoted and/or lifted away from the main housing  14  with assistance from the release member  44 . After which, the chub pack  2  can be removed, with or without the nozzle tip  70 . 
     Referring to  FIGS. 9 and 10 , the present technology can be associated with a motorized material dispensing system  100  including a handle section  110 , a drive section  120 , and a material chamber section  160  for receiving the material packaging or chub pack  2  and the nozzle tip  70 . A cap  174  can be utilized to secure the nozzle tip  70  to an opened end of the material chamber section  160 . A piston rod  162  is moveable associated in the material chamber section  160 , and is configured to push against the chub pack  2  when operated. It can be appreciated that the motorized dispensing system  100  can include an overall housing made of pieces or sections that are connected together to form the housing. 
     With references to  FIGS. 11-13 , the handle section  110  includes a trigger  112  pivotably mounted and spring biased, a power source (e.g. a battery)  114 , and a charging port  116  in communication with the battery  114 . A controller, processor, switch or a printed circuit board (PCB)  118  including circuitry, processor, memory and/or controllers can be provided to control power to and from the battery  114 , and operations of the motorized material dispensing system  100 . The trigger  112  features a finger engaging surface exterior of the handle section  110 , and a trigger extension  113  interior of the handle section  110 . The handle section  110  can include an ergonomic shape with padding, gripping means, cushioning or other means to provide comfort or ease of use for a user grasping the handle section  110 . 
     The drive section  120  is adjacent the handle section  110 , and includes a motor and gearbox assembly operably positioned therein. The motor and gearbox assembly includes an electric motor  122 , at least one planetary gear  125  and sun gear  126  stage or assembly, at least one lock block  128 , and a transmission  144  for converting a rotational output of the planetary assembly to a translational output of the piston rod  162 . 
     The motor  122  can be configured as a DC motor that receives power from the battery  114 . In an alternative, the motor  122  may be powered by a remote power source (e.g., a household electrical outlet) directly through a power cord or indirectly by way of the battery  114  that receives power from the remote power source. The motor  122  is controllably activated by depressing the trigger  112 , which can be in operable communication with the PCB  118  for providing variable power to the motor  122 . 
     Attached to the motor  122  is a gearbox  123  configured to house the planetary gear  125  and sun gear  126  assembly. A motor pinion gear  124  is operably engageable with an output of the motor  122 , and extends into the gearbox  123  for rotation therein. It can be appreciated that the planetary gear assembly  125  consists of multiple planet gears that are orbitally rotating and engageable with the motor pinion gear  124  or the sun gear  126 . The motor pinion gear  124  engages with the planetary gears  125 , which in turn, engages with the sun gear  126 , as best illustrated in  FIG. 14 . The planetary gear  125  and sun gear  126  assembly are configured to reduce the rotational speed of the motor pinion gear  124 , and thus the motor  122 . It can be appreciated that multiple successive planetary and sun gear assemblies or stages can be utilized to reduce the motor speed accordingly. 
     Surrounding the planetary gear assembly  125  or the last planetary gear stage is a ring gear  130  including internally extending gear teeth engageable with the planetary gears  125  orbitally rotating therein. The ring gear  130  includes a plurality of radially arranged notches  131  defined in an exterior surface thereof, as best illustrated in  FIGS. 12-14 . 
     The lock block  128  is slidable received in a groove or channel  127  defined in the gearbox  123 . The extension  113  of the trigger  112  is receivable in an opening or slot  128   a  defined in the lock block  128  to impart a translation movement from the trigger  112  to the lock block  128 . The lock block  128  includes a detent  129  that is configured to be receivable in at least one of the notches  131  of the ring gear  130  when the trigger  112  is depressed, thereby performing an operation of a clutch. A spring  132  provides a biasing force against the lock block  128  toward the ring gear  130 . The detect  129  and the notches  131  of the ring gear  130  are configured so that the ring gear  130  rotates freely when the trigger  112  is not depressed or is released, thereby immediately halting advancement of the piston rod  162  even if the motor  122  is still operating. Depressing the trigger  112  results in movement of its extension, which in turn moves the lock block  128  toward the ring gear  130  until the detent  129  is received in one of the notches  131 . When the detent  129  is received in one of the notches  131 , the ring gear  130  is prevented from rotating and thus allowing the transfer of torque to the transmission  144 . 
     A washer or back plate  134  is adjacent the ring gear  130  and lock block  128 , and is configured to secure the lock block  128 , the ring gear  130 , and the planetary gears  125  and sun gear  126  assembly in the gearbox  123 . The back plate  134  includes a slot configured to slidably receive the extension of the trigger  112 . 
     A spindle  136  rotatably supports the final planetary gear stage  125  that is engaged with the ring gear  130 . The spindle  136  extends through the back plate  134  and a gearbox cover  138  via a spindle bearing  140 . The gearbox cover  138  is secured to an open end of the gearbox  123  thereby sealing and enclosing the lock block  128 , the ring gear  130 , and the planetary gears  125  and sun gear  126  stages. The spindle  136  is capable of rotating when the ring gear  130  is locked and prevented from rotating, upon which torque from the planetary gears  125  is transferred to the spindle  136  and thus to the transmission  144 . 
     The transmission  144  is secured to the gearbox cover  138  and in turn to the gearbox  123 . A bevel pinion gear  142  is secured to a free end of the spindle  136  that is exterior of the gearbox  123  and interior of the transmission  144 . A bevel gear  146  is rotatably received, via a shaft  150 , in the transmission  144 , and is operably engageable with the bevel pinion gear  142 . The bevel gear  146  has a translation gear section  148  that is exterior of the transmission  144 . The bevel gear  146  and its translation gear section  148  are configured for converting the rotational output of the spindle  136  to a translational output of the piston rod  162 . 
     A dial  152  may be rotatably supported by the drive section  120  adjacent the handle section  110  and forward of the trigger  112 . A small portion of the dial  152  extends outwardly and through an opening in the drive section  120  to be accessible by a user. The dial  152  is operably connected with the PCB  118  for controlling at least in part the torque or speed of the motor  122 , as best illustrated in  FIG. 13 . 
     The material chamber section  160  is adjacent and above the drive section  120 , and includes a first end defining an opening configured to slidably receive therethrough the piston rod  162 , and an opened second end featuring an exteriorly threaded or engaging means portion. The piston rod  162  includes a first end capably of being grasped by a user, a longitudinally running gearing or rack  164 , a longitudinally flat first section  166 , a longitudinally flat second section  168 , and a second end featuring a threaded stud. A piston  170  is securable to the second end by way of a fastener engaged with the threaded stud. The piston  170  has a diameter greater than the piston rod  162 , and is configured to contact and press against the chub pack  2 . 
     The rack  164  extends from the piston rod  162  along a majority or an entirety of its longitudinal length, and is configured to engage with the translation gear section  148  of the bevel gear  146 . Rotation of the bevel gear  146  results in rotation of the translation gear section  148 , which in turn results in longitudinal movement of the piston rod  162 . 
     The material chamber section  160  may include a position sensing device that is in contact with the first section  166 , and is in communication with the PCB  118 . This position sensing device is configured and capable of determining the longitudinal position and/or travel distance of the piston rod  162 . The material chamber section  160  may further include an internally projecting wall that extends toward and contacts the second section  168 . This internally projecting wall is configured to keep the piston rod  162  in a predetermined orientation so that the rack  164  is engageable with the translation gear section  148  of the bevel gear  146 . 
     A tube  172  is positioned in the material chamber section  160 , and defines a tubular interior chamber configured to slidably receive the piston  170 . The tube  172  may have a diameter less than the opened second end of the material chamber section  160 , thereby allowing for different tubes  172  to be utilized or for the utilization of a prefilled material tube. The tube  172  further defines an interior space having a configuration capable of receiving the chub pack  2  or the prefilled material tube therein. It can be appreciated that different sized tubes  172  and pistons  170  can be utilized for different sized chub packs  2  or for different applications. 
     The chub pack  2  may be inserted through the opened second end of the material chamber section  160  and consequently received in the tube  172 . The opened second end of the material chamber section  160  may have a diameter less than a diameter of the remaining portion of the material chamber section  160 , thereby creating an inwardly extending ledge. The ledge may be configured to contact an end of the tube  172  inserted therein, thereby securing it in place. 
     The cap  174  includes interior threads or other engaging means that correspond with the exterior threads or engaging means of the opened second end of the material chamber section  160  for securing the cap  174  thereto. The cap  174  includes an opening having a configuration capable of receiving the dispensing end  88  of the nozzle tip  70  or a nozzle of a material tube therethrough. The ledge  76  of the cap  70  has a configuration capable of abutting against an internal edge of the cap  174  that in part defines the opening of the cap  174 . The ledge  76  prevents the nozzle tip  70  from being pushed through and out the cap  174 . 
     The nozzle tip  70  can have a configuration capable of receiving an end portion of the chub pack  2 . It can be appreciated that the nozzle tip  70  can be integrally formed with the cap  174 , thereby creating a single cap and nozzle tip unit. 
     It can be appreciated that after the chub pack  2  is inserted into the tube  172 , the nozzle tip  70  is received in the opened second end of the material chamber section  160  by securing the cap  174  to the opened second end so that the dispensing end  88  extends through the opening of the cap  174 . Advancement of the piston rod  162  results in the piston  170  contacting an end of the chub pack  2 , which in turn results in the other end of the chub pack  2  to be pressed against the piercing projections  80  thereby puncturing the chub pack  2 . Once the chub pack  2  is punctured by the piercing projections  80 , the piercing projections  80  are inserted/received into the interior of the chub pack  2  so that any material in the chub pack  2  is allowed to flow through the channel  84  and into hollow interior of the nozzle tip  70 , and then into the dispensing end  88 . Continued advancement of the piston rod  162  results in material being dispensed out of the chub pack  2  and through the nozzle tip  70 . 
     It can now be understood that the material dispensing system  100  of the present technology can be used to dispense a material, such as but not limited, caulk, adhesive, sealant, paste, cement and the like, from a chub pack  2  or prefilled material tube. In exemplary use, with the piston rod  162  fully retracted, a user can install the tube  172  into the material chamber section  160  and then insert the chub pack  2  tube  172  or install the chub pack  2  into the tube  172  and then insert the tube  172  and chub pack  2  into the material chamber section  160 . The nozzle tip  70  can then be inserted through the opened second end of the material chamber section  160  and secured in place by securing the cap  174  to the opened second end of the material chamber section  160 . 
     The user can then operate the trigger  112 , which in turn operates the motor  122 , which in turn provides torque to the planetary gears  125  and sun gears  126  assembly. 
     Simultaneously with depression of the trigger  112  and operation of the motor  122 , the trigger  112  moves the lock block  128  so that its detent  129  is received in one of the notches  131  of the ring gear  130 , thereby preventing the ring gear  130  from rotation, which in turn allows torque from the planetary gears  125  and sun gears  126  assembly to transfer to the spindle  136 . Torque from the spindle  136  is consequently transferred to the bevel pinion gear  142  and then to the bevel gear  146 , which in turn rotates the translation gear section  148 . Rotation of the translation gear section  148  transfers the torque to linear movement of the rack  164  of the piston rod  162 , which in turn advances the piston rod  162  which advances the piston  170  toward the end of the chub pack  2 . 
     The advancement of the piston  170  pushes the other end of the chub pack  2  against the piercing projections  80  so that the piercing end  82  punctures through the end of the chub pack  2 , thereby opening a passage between the interior of the chub pack  2  and the hollowing interior of the nozzle tip  70 . Material from the chub pack  2  is then dispensed through the dispensing end  88  as long as the trigger is depressed. The user can adjust the speed or torque of the motor  122  by operating the dial  152 . 
     To cease the dispensing of material, the user would release the trigger  112 , which in turn stop operation of the motor  122  and slides the lock block  128  out of engagement with the ring gear  130 , thereby allowing the ring gear  130  to rotate freely and immediately avoiding unwanted dispensing of material. 
     While embodiments of the material dispensing system have been described in detail, it should be apparent that modifications and variations thereto are possible, all of which fall within the true spirit and scope of the present technology. With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of the present technology, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present technology. For example, any suitable sturdy material may be used instead of the above-described. And although controllably dispensing material from a chub pack have been described, it should be appreciated that the material dispensing system herein described is also suitable for dispensing any material stored in a packaging or container by piercing the packaging using advancing pressure supplied by a moving piston. 
     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 technology. It is, 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 technology. 
     Therefore, the foregoing is considered as illustrative only of the principles of the present technology. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the present technology to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the present technology.