Patent Application
20150299970
Not applicable.
The present invention relates generally to a device for picking up dog waste. More specifically, the present invention discloses an earth friendly device that presses a paper lattice material into the dog waste, lifts the waste from the ground, and discreetly stores the waste for transport to a garbage bin or a composting bin.
Dog waste is a pollutant and contains harmful bacteria. If not collected responsibly, dog waste kills the nearby vegetation, and the bacteria from the waste can contaminate the groundwater and nearby bodies of water.
Many people do not clean up their dog's waste, especially when walking their dog, largely because the available tools for picking up and transporting the waste are unpleasant to use. The most common approach requires the dog owner to place a plastic bag over their hand and then cradle the dog waste in their hand while picking it up. The warmth and texture of the waste is difficult for most people to become accustomed to, and a tiny hole in the bag can allow a passage way for bacteria.
Dog waste that is disposed within small plastic bags is typically transported to a landfill where it becomes preserved for perhaps hundreds of years. Several cities and waste management companies are currently exploring alternative approaches for eliminating dog waste without transporting it to a landfill. The medium for which the dog waste is collected is an important component to solving this problem.
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
Embodiments of the present invention are directed to a lifting and temporary storage device for dog waste utilizing a paper lattice material coupled to the interior of a base canister where placement of the device onto a pile of waste with manual pressure adheres the waste to the lattice material. The device for picking up dog waste comprises a reusable shallow canister containing a disposable paper lattice with thin dividers that extend perpendicular from the interior base of the canister and also comprises a disposable paper lid.
A series of cleats protruding along the interior perimeter of the canister wall near the base of the canister secure the paper lattice material to the canister. The cleats support the weight of the lattice material and the dog waste when the open canister is lifted from the ground.
The paper lid covers the opening of the canister and provides a barrier for containing the dog waste during transport. A retaining slot for insertion of the paper lid pinches the skirt of the lid and secures the lid in place. Extraction holes on the base surface of the canister allow easy extraction of the used paper lattice material and the paper lid by pushing a finger through the extraction hole and pushing material out from the cleats.
The device also comprises an optional removable interface bracket which couples a vertical pole handle to the top surface of the canister and allows for pick up of the dog waste without bending over. The vertical pole handle is hollow and contains a sliding vertical rod terminated with a support member that is bonded to an extraction plug at each opposing end. The sliding vertical rod presses the extraction plugs into the canister extraction holes and easily extracts the used paper lattice material.
In the accompanying drawings, which form a part of the specification and are to be read in conjunction therewith and in which like reference numerals are employed to indicate like parts in the various views:
With reference to the drawings, wherein like reference characters designate like parts throughout the different views, a lifting and temporary storage device for dog waste is disclosed. More specifically, a device for easy collection and disposal of dog waste is disclosed where the device is pressed onto the pile of waste with the user's foot, and the waste becomes lodged into a paper lattice material. Through this mechanism, the collecting of dog waste is more appealing, and the disposable medium for transporting the waste is biodegradable and earth-friendly.
Referring initially to
The interior of the waste capture material 103 has multiple dividing walls 102 that separate the waste capture material 103 into multiple independent chambers. As shown in
The canister 104 has single threads 112 on its inner cylinder walls so that the kraft paper 111 is held in place under the threads 112 when the honeycomb paper lattice 103 is rotated and pressed underneath the threads 112. The threads 112 and snug fit of the honeycomb 103 provide enough resistance to uphold the weight of the dog waste when the canister 104 is lifted from the ground.
The threads 112 can also be replaced with short segments of thread or protruding cleats evenly spaced around the inner circumference of the canister 104. The kraft paper 111 provides a barrier between the canister 104 and the waste so that the canister 104 is not soiled during waste retrieval.
To retrieve dog waste, the canister 104 is placed with the canister opening 172 and the dividing walls 102 facing down toward the waste. With the canister 104 resting and centered on the waste, the user places one foot onto the outside surface of the canister 104 and presses much of their weight onto the canister 104. This drives the waste up into the paper honeycomb lattice 103 and divides the waste into multiple sections. Each section of waste adheres to the side walls 102 of each independent chamber and becomes difficult to remove. This process is similar to stepping in dog waste with treads of a shoe; however, the waste canister 104 has much deeper chambers in lieu of treads, and the waste canister 104 completely isolates the user's shoe from the waste.
Once the canister 104 is pressed fully to the ground, and the waste is fully hidden, the canister 104 can easily be picked up without contacting the waste. As shown in
After picking up the canister 104, the user discreetly sets the canister 104 onto the lid 100 and presses the lid 100 over the opening. The inside diameter of the lid 100 has only a slightly larger diameter than the canister 104 so that it has a snug fit, and the lid 100 seals most of the odor within the canister 104.
The total surface area of the walls 102 within an individual divided chamber is much greater than the contact surface area of the waste 108 to the ground surface. This results in the waste 108 adhering more strongly to the individual chamber walls 102 in lieu of the ground surface. In most instances when walking a dog, the waste 108 will be deposited on grass, dirt, or sand which all have less adhesive capability. To further increase the adhesion on the divided chamber walls 102, the dividers 102 can be manufactured with a rough surface finish.
The depth D1 of the canister 104 in
For large dogs or for scattered piles, the honeycomb edges 103 can be used to brush the waste 108 into a condensed pile prior to placing the canister 104 onto the pile. A notched edge 113 of the canister 104 provides exposed honeycomb lattice 103 that can be used for the brushing motion. Separated piles that cannot be picked up with one placement of the canister 104 can be pressed into the honeycomb lattice 103 with a second placement and stepping motion.
Due to different expansion characteristics of dissimilar materials in varying temperatures, the diameter of the canister 104 may expand and contract more significantly than the inside diameter of the paper lid 100. If the canister 104 is manufactured from a pliable material such as plastic, flexible tabs 114 can be added to hold the paper lid 100 in place in all temperature extremes. After waste retrieval, the lid 100 is placed on the canister 104, and the flexible tabs 114 with raised wedges 115 provide a clasp that grabs inside skirt of the paper lid 100 to hold the lid 100 in place.
The canister 104 as shown in
A second set of the teeth 153 with the wedge 154 are affixed on the opposite side of the canister 104 so that the lid 100 is pinched at two points. The canister 104 as depicted in
A hole 110 is located in the canister 104 near each of the handles 109. The holes 110 in conjunction with the handles 109 are used to easily extract the used honeycomb lattice 103 and the used lid 100 from the canister 104 as one assembly. With fingers cradled under each of the handles 109, the user can project a thumb, or other object, through the extraction hole 110 on each side of the canister 104 and gently push out the used honeycomb lattice 103 and the used lid 100 while isolated from the waste 108 by the kraft paper 111.
The waste clean-up tool 200 can also have a multi-use application, such as at home each time the dog leaves its waste in the yard. In this application, the lid 100 is not needed because the used honeycomb lattice 103 is immediately removed and discarded. A pole handle 121, as shown in
An interface bracket 117 snaps onto the top of the canister 104 and provides for connection of the vertical pole handle 121. One such shape for the interface bracket 117 is a cone shape such as that shown in
After pressing the storage device onto the waste, the pole handle 121 can be used to carry the used honeycomb lattice 103 to the garbage can or a drying location. An access hole 122 on each side of the bracket 117 allows the user to access the extraction holes 110 on the canister 104 for easy removal of the used honeycomb lattice 103.
An additional accessory for quick removal of the honeycomb lattice 103 can be added to the vertical handle 121 as shown in
The cylindrical plugs 122 are sized slightly smaller than the diameter of the extraction holes 110. When the rod 124 is pushed down toward the canister 104, the cylindrical plugs 122 poke through the extraction holes 110 and push the used honeycomb lattice 103 out of the canister 104.
When not in use, the support member 123 and the plugs 122 are lifted to the top of the bracket 117 with the sliding rod 124 and snap into an upright locked position. Once locked into the upright position, the support member 123 and the plugs 122 provide clearance for the user to place their foot through the bracket 117.
The hollowed handle 121 is slotted at its top end as shown in
To lock the rod 124 in the upright position, the pin 125 engages into a latching collar 126 at the top of the hollow handle 121. The latching collar 126 is a thin flexible plastic that has a slight oval shape, and its top opening is affixed or plastic welded to the hollow handle 121.
The widest diameter of the oval shaped collar 126 is perpendicular to the axis of the pin 125, and the narrowest diameter of the oval shaped collar 126 is parallel to the axis of the pin 125. A void between the hollow handle 121 and the interior of the oval shaped collar 126 that results due to the oval shape of the collar 126 allows the oval shaped collar 126 to be compressed by hand in the direction perpendicular to the axis of the pin 125.
A wedge 127, embedded into the plastic oval shaped collar 126, provides a ramp for the pin 125 as the solid rod 124 is slid upward and the pin 125 enters the oval shaped collar 126. As the wedge 127 rides the surface of the pin 125, the collar 126 is pushed out and the oval collar 126 temporarily becomes a circular shape. When the pin 125 reaches a hole 128, the collar 126 snaps back into its natural oval shape, and the solid rod 124 is latched into an upright position.
When the oval collar 126 is manually compressed in a direction perpendicular to the axis of the pin 125, the collar 126 becomes a circular shape again, releasing the pin 125 from the hole 128, and the solid rod 124 can be slid in the downward direction. The manual compression is applied by the user while cradling the oval collar 126 in the hand and squeezing in the direction perpendicular to the axis of the pin 125. The user compresses the collar 126 to release the latch when it is time to eject the used honeycomb lattice 103 from the canister 104 with the support member 123 and the plugs 122.
An alternate design for the dog waste clean-up tool for use at home is depicted in
The bottom edge of the tall canister 166 has a series of cleats 170 protruding along the interior perimeter of the canister 166. The cleats 170 clasp onto the kraft paper 111 glued to the top of the honeycomb lattice 103 and retains the stack of honeycomb cartridges 103 within the tall canister 166. The honeycomb lattice 103 at the bottom of the stack extends beyond the end of the tall canister 166, and the piston 167 is screwed down onto the top honeycomb lattice 103 at the top of the stack.
To utilize the alternate dog waste clean-up tool of
The soiled honeycomb lattice 103 can be easily dislodged by rotating the handle 168 which drives the piston 167 toward the opening of the canister 166. The bottom honeycomb lattice 103 is pushed out past the cleats 170 and is immediately replaced with the next clean honeycomb lattice 103 in the stack. If the interior diameter of the canister 166 is not wide enough for the user to reach the handle 168, an extension rod can be added to extend the handle beyond the length of the canister 166.
For dog waste clean-up at night or early morning when light is limited, a lighting accessory 145 for the dog waste clean-up tool is presented in
Snap buttons 150 on the top surface of the narrow ring 146 as indicated in
Carrying the concealed waste 108 within the rigid canister 104 covered with the lid 100 is discreet and more appealing than a bag full of waste. The canister 104 can be manufactured with low cost, lightweight plastic or other solid reusable material. The disposable honeycomb lattice 103 and the lid 100 can be manufactured from low cost biodegradable material such as fabricated rigid cardboard, paper, or recycled molded pulp. The used honeycomb lattice 103 and the lid 100 can be placed into a large re-sealable garbage bag or directly into a garbage bin or compost bin.
The divider walls 102 can be spaced or arranged in varying configurations other than square or hexagon shaped. The dividers 102 can form chambers that are circular, triangular, or shaped like other polygons. The divider walls 102 and the lid 100 can be coated or saturated with a de-odorizing chemical which eliminates or reduces the odor from the dog waste.
The paper lattice material 103 as described has one side of kraft paper 111 glued to the honeycomb edges. As depicted in
Without the canister 104, the soiled paper lattice 103 can be placed in a bag for disposal. This application for the paper lattice 103 would be most useful for very large dogs in which case a wider canister 104 would be bulky or difficult to transport while on a walk. The shape of the paper lattice in
A cardboard disc 160 has a die cut pattern to match the spiral shaped guide 159 and is placed into the alternate shallow canister 156 prior to winding the narrow strip of thin cardboard 155. The cardboard disc 160 provides a barrier similar to that of the glued kraft paper 111.
To form a cardboard winding 161, a deep spiral shaped guide 162 is first affixed to a wall or table. The cardboard disc 160 is placed within the alternate shallow canister 156 while aligning a key pin 163 with a key slot 164, and the shallow canister 156 is then placed over the deep spiral shaped guide 162 while aligning the key pin 163 with the key slot 164.
Rather than placing the honeycomb cartridge 103 into the canister 156, the user threads the cardboard strip 155 into access opening 158 and pushes the cardboard strip 155 through the full length of the spiral shaped guide 159 and the deep spiral guide 162. In order to keep the cardboard strip 155 aligned with edges parallel to the surface of the alternate canister 156, the edge of the cardboard strip must be held against the wall or table while being fed into the spiral guides 159 and 162.
A V-shape cutting blade 163 can be added near the access opening 158 so that the cardboard strip 155 can be cut to the proper width from a wide sheet of cardboard as the strip 155 is pushed into the spiral guides 159 and 162. This process will require that the excess cardboard sheet is pulled across the V-shape cutting blade 163 from behind the blade 163 with one hand while the user also pushes the strip 155 into the access opening 158 with the other hand.
The width of the slot 157 is slightly narrower than the thickness of the cardboard strip 155; therefore, the slot 157 compresses the edge of the cardboard strip 155 as it slides into the slot 157. The compression of the cardboard strip 155 holds the cardboard strip 155 in place and coupled to the canister 156. After the winding 161 is formed, the assembly can be removed from the deep spiral guide 162. The winding 161 coupled to the canister 156 supports the weight of the dog waste 108 when the canister 156 is lifted from the ground. The dog waste 108 is pressed into channels formed from the cardboard strip 155 and adheres to the walls of the cardboard strip 155.
The alternate design for the dog waste clean-up tool depicted in
The waste clean-up tool 200 can be scaled in width and depth proportionally to the size of the dog and can be offered in multiple sizes. Even further, the waste clean-up tool 200 could be scaled up to accommodate larger animals such as a horse. This scale of waste clean-up tool 200 could be utilized during a parade or while showing animals at a fair to discreetly retrieve waste in lieu of scooping it up with a shovel.
The present invention has been described in relation to particular embodiments, which are intended in all respects to be illustrative rather than restrictive. Alternative embodiments will become apparent to those of ordinary skill in the art to which the present invention pertains without departing from its scope. Substitutions may be made and equivalents employed herein without departing from the scope of the invention as recited in the claims. It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations. This is contemplated and within the scope of the claims.
This application claims priority to U.S. Provisional Patent Application Ser. No. 61/982,376 filed on Apr. 22, 2014, Application Ser. No. 62/032,606 filed on Aug. 3, 2014, and Application Ser. No. 62/101,802 filed on Jan. 9, 2015.
| Number | Date | Country | |
|---|---|---|---|
| 61982376 | Apr 2014 | US | |
| 62032606 | Aug 2014 | US | |
| 62101802 | Jan 2015 | US |
