Patent Application
20140338788
The present invention relates to dispensers, and more particularly, to a dispensing apparatus and method for dispensing flowable solid materials.
Dispensers for dispensing flowable solid materials into receptacles are known in the art. These dispensers can dispense food or non-food items, small particulate matter such as sand or powdered candy, or larger items such as nuts or small toys (e.g. marbles). Problems that can occur with dispensers include unauthorized dispensing of the material or improper closure of the dispensing mechanism following use, thus leading to leakage of material from the dispenser. What is needed is an improved dispensing apparatus that avoids unauthorized use and prevents product waste by ensuring proper closure of the dispensing mechanism.
The present invention is a dispensing apparatus and method for dispensing flowable solid materials. The invention preferably comprises a container for holding the dispensable material, a housing, a dispensing assembly, a lever locking assembly including a latch assembly and a release assembly, a receptacle locking assembly, and a receptacle. The housing preferably comprises a hopper in communication with the container, an angularly disposed piston shaft having an increased diameter upper portion in communication with the hopper, a spiral chute in communication with the piston shaft upper portion, a pivotable door mounted between the piston shaft and the chute, and a receptacle receiving area in communication with the chute. The dispensing assembly preferably comprises a pivotable lever having a first end operable by a user and movable within a vertically disposed lever slot, a piston mounted within the piston shaft wherein a lever second end is operably connected to the piston to linearly advance and retract the piston within the piston shaft, and a pivotable tensioning arm for engaging the lever second end to bias the lever second end downward. The latch assembly preferably comprises a latch arm pivotably biased into the receptacle receiving area, a slidable latch plate having an opening therein wherein the latch plate is operable to slidably block or unblock the lever slot, a first pivotable member operably connected to the latch arm and the latch plate, and a second pivotable member operably connected to the latch arm. The release assembly preferably comprises a release arm pivotably biased into the receptacle receiving area and a release pin operably connected to the release arm, wherein the release pin is operable to engage or disengage the latch plate opening. The receptacle locking assembly preferably comprises a cam member pivotably biased into the lever slot, a vertically disposed locking member pivotably attached to the cam member, a locking plate operable to slide into the receptacle receiving area, a first notch formed in the locking plate for receiving the latch arm second pivotable member therein, and a second notch formed in the locking plate for receiving a bottom end of the locking member. The receptacle preferably comprises an annular surface and an annular flange.
In operation, the receptacle is inserted into the receptacle receiving area. The receptacle annular flange engages the release arm and pivots the release arm out of the receptacle receiving area and thereby disengages the release pin from the latch plate opening. The receptacle annular surface engages the latch arm and pivots the latch arm out of the receptacle receiving area, thereby urging the latch arm first pivotable member to slide the latch plate to unblock the lever slot and urging the latch arm second pivotable member to slide the locking plate into the receptacle receiving area and thereby prevent the receptacle from being removed from the receiving area. The lever first end can now be urged downward by a user. As the lever first end is urged downward, the lever first end engages the cam member and pivots the cam member out of the lever slot and thereby urges the locking member bottom end into the second notch to prevent the locking plate from being removed from the receiving area. As the lever first end is urged downward, the lever second end engages the piston and advances the piston through the piston shaft to push the dispensable material from the piston shaft upper portion through the pivotable door and into the chute wherein the dispensable product gravity flows down the chute and into the receptacle in the receptacle receiving area.
Once the product has been fully dispensed, the lever first end can now be returned to its home position by being urged upward by the user and/or by action of the pivotable tensioning arm. As the lever first end is urged upward, the lever second end retracts the piston back through the piston shaft to allow additional product to gravity flow into the piston shaft upper portion. As the lever first end is urged upward, the lever first end disengages from the cam member to allow the cam member to pivot into the lever slot and thereby urge the locking member bottom end out of the second notch. The receptacle can now be removed from the receptacle receiving area. As the receptacle is removed, the receptacle annular surface disengages from the latch arm to allow the latch arm to pivot into the receptacle receiving area, thereby urging the first pivotable member to slide the latch plate to block the lever slot and urging the second pivotable member to slide the locking plate out of the receptacle receiving area. The receptacle annular flange disengages from the release arm to allow the release arm to pivot into the receptacle receiving area, thereby urging the release pin into the latch plate opening.
These and other features of the invention will become apparent from the following detailed description of the invention.
While the following description details the preferred embodiment of the present invention, it is to be understood that the invention is not limited in its application to the details of construction and arrangement of the parts illustrated in the accompanying drawings and described herein, since the invention is capable of other embodiments and of being practiced in other ways. Various changes in the details, materials, and arrangements of the parts which have been described and illustrated herein in order to explain the nature of this invention may be made by those skilled in the art without departing from the principle and scope of the invention.
The present invention, shown in
The dispensing assembly 15 further comprises one or more tensioning assemblies 20, wherein each tensioning assembly 20 preferably comprises a tensioning arm 21 having a first end 21a pivotably connected to the housing 13 and a movable second end 21b. A spring 22 biases the tensioning arm second end 21b toward a lowered position. The dispensing assembly 15 further comprises a material flow control door 23 pivotably mounted over the piston shaft upper end 19c wherein the door is biased to a closed position, a material flow chute 24, a chute cover 25, and a material flow receptacle shaft 26. The chute 24 is preferably spiral shaped to promote channeling of the dispensable product into the receptacle shaft 26. The spiral shape promotes outward spinning of the dispensable product as it gravity flows down the chute 24 such that the product becomes somewhat aligned, thereby promoting dispensing of the product into receptacles having small openings. This is an important feature inasmuch as if the same amount of product were to be dispensed directly into a standard funnel shaped mechanism, it would tend to bridge at the opening and block the dispenser. The chute cover 25 is preferably transparent so that a user can visually observe the dispensable product flowing down the chute 24. The housing 13 preferably has a plurality of apertures 27 through which a limit pin 28 can be inserted to limit the distance that the lever second end 16c can travel and thereby limit the travel distance of the piston 17 and the amount of dispensable product that can be dispensed per each lever action.
The dispensing apparatus 10 further comprises a locking assembly that includes a lever locking assembly 40 for controlling movement of the lever 16 and a receptacle locking assembly 60 that secures a product receptacle 30 to the housing 13 while product is being dispensed therein. The product receptacle 30 preferably comprises a tubular container 31 having a top cap 32 wherein the cap 32 has an annular surface 33 and an annular flange 34. Other shapes of receptacles can be used; however, it is important that they include features capable of operably engaging the locking assembly as described hereinbelow. The housing 13 has a receptacle receiving area 35 that includes a first slot 36, a second slot 37, and a third slot 38.
The lever locking assembly 40 comprises a pivotable latch arm 41 having a first end 41 a pivotably attached to the housing 13 and a second end 41b that extends into the receptacle receiving area 35 through slot 36, a latch arm spring 42 that biases the latch arm second end 41b through the first slot 36, a first latch arm pivot member 43 operably connected to a pivotable rod 44 having a vertically disposed latch spring 45 secured thereto, and a second latch arm pivot member 46. The latch spring 45 has a first end 45a attached to the pivotable rod 44 and a second end 45b attached to a horizontally slidable latch plate 47 having a slot 48 therein. The latch plate 47 slidably engages a vertical lever slot 49 such that the latch plate 47 is operable to block the lever slot 49.
The lever locking assembly 40 further comprises a pivotable release arm 50. The release arm 50 has a first member 51 that extends into the receptacle receiving area 35 through slot 37, a pivot rod 52 pivotably attached to the housing 13, a second member 53 attached at a first end 53a to the pivot rod 52 and at a second end 53b to a latch plate release pin 54. A vertically disposed release arm spring 55 biases the second end 53b upward so that the release pin 54 is biased upward to engage the slot 48 in the latch plate 47.
The receptacle locking assembly 60 comprises a horizontally slidable locking plate 61 having a locking tab 62 that is operable to extend into the receptacle receiving area 35 through slot 38, a first slot 63 for receiving the second latch arm pivot member 46, and a second slot 64 for receiving a locking member second end 66b. The receptacle locking assembly 60 further comprises a vertically slidable locking member 66 having a first end 66a and a second end 66b. The locking assembly 60 further comprises a cam member 65 pivotably connected at a first end 65a to the housing 13 and at a second end 65b to the locking member first end 66a. A cam spring 67 biases the cam member 65 into the lever slot 49.
In operation, a user inserts the product receptacle 30 into the receptacle receiving area 35 of the housing 13 to start the product dispensing process, best shown in
As the product receptacle 30 is completely inserted within the receiving area 35, the receptacle annular surface 33 engages the latch arm 41 and the receptacle annular flange 34 engages the release arm first member 51. Release pin 54 is initially engaged within slot 48 of latch plate 47 to prevent latch plate 47 from sliding out of lever slot 49, best shown in
With latch plate 47 out of lever slot 49, lever first end 16a can be pulled downward, best shown in
As lever first end 16a is pulled downward, lever second end 16c pivots upward and thereby actuates the connecting rod 18 to push piston 17 angularly upward through the piston shaft 19 such that the dispensable product is pushed upward through piston shaft upper portion 19b and piston shaft upper end 19c and out of door 23, best shown in
Once the user is finished obtaining product, the lever first end 16a must be returned to its raised home position, after which, the cam spring 67 will bias the cam 65 back into its home position and thereby raise the slide lock 66 so that the slide lock second end 66b releases the slide plate 61. As the product receptacle 30 is removed from the receptacle receiving area 35, the latch arm spring 42 biases the latch arm second end 41b back through slot 36 and the release arm spring 55 biases the release arm first member 51 back through slot 37. As latch arm 41 pivots, first pivot member 43 actuates pivot rod 44 to rotate clockwise so that latch plate 47 is moved back into lever slot 49 so that lever first end 16a is secured above latch plate 47. As release arm 50 pivots, release pin 54 is urged upward to engage slot 48 as latch plate 47 slides back into lever slot 49. Further, as latch arm 41 pivots, second pivot member 46 actuates slide plate 61 to move away from receptacle receiving area 35 so that locking tab 62 is withdrawn through slot 38 out of receiving area 35, thereby allowing the product receptacle 30 to be fully removed from the receiving area 35.
The dispensing apparatus is capable of storing and dispensing a variety of solid materials (e.g. rice, nuts, candy, marbles) in varying amounts as desired by the user. The apparatus has a variable storage capacity due to the modular storage containers. Also, while many dispensers utilize gravity to move material from the storage area to the dispensing opening, the current invention lifts the material angularly up and out giving more control over the amount of material dispensed while preventing accidental free flow and waste. Unlike typical dispensers of this type, the current invention requires a special receptacle to be positioned properly within it before dispensing is allowed. This feature is helpful to prevent unauthorized dispensing of the stored materials and reduces waste. Other dispensers are known to clog or bridge the material when attempting to dispense into containers with small openings, however, the current invention is able to dispense materials into containers with small entry openings (e.g. tube, small bag) without clogging or bridging of the material.
While the invention has been shown and described in some detail with reference to a specific exemplary embodiment, there is no intention that the invention be limited to such detail. On the contrary, the invention is intended to include any alternative or equivalent embodiments that fall within the spirit and scope of the invention as described above and as recited in the appended claims.
