1. Field of the Invention
The present invention relates to waste containers and more particularly to a container for storing animal waste, that minimizes exposure to the user of odor from waste stored in the container.
2. Background Art
Pet waste, particularly canine and feline waste, is commonly stored in individual plastic bags and then disposed of in a trash can, or waste container. The cumulative odor of the pet waste, along with other waste stored within the trash can, can reach an offensive level such that it is difficult to use and the trash can must be emptied before it is full in order to minimize the odor.
There are a variety of known waste containers that minimize odor of human feces by creating individually wrapped packages of waste that are stored in the container. These containers use special liners that are twisted around the waste. These liners can be expensive to replace. Additionally, the cumulative odor escaping from the packages of waste can still become quite strong and offensive such that the waste container must still be emptied before it reaches full capacity.
Furthermore, some waste containers have lids which are effective to contain odors when the container's lid is closed, but the user is exposed to the cumulative odor each time the user opens the lid to place more waste within the container.
Accordingly, the need exists for a waste container which effectively contains the waste odor and minimizes the user from being exposed to the odor even when the user places more waste within the container.
The present invention provides a waste container with an upper lid and an internal lower lid provided over a base chamber in which waste is stored, to minimize a user's exposure to odor from waste.
Presented herein is a waste container having a housing, a top chamber with a first opening for receiving waste; a base chamber disposed below the top chamber having a second opening for receiving waste from the top chamber; an upper lid disposed on the top chamber; a lower lid disposed on the base chamber; and a drive mechanism mechanically coupling the lower lid with the upper lid. In one embodiment, the base chamber has a third opening disposed opposite the second opening, and the waste container includes a storage chamber disposed below the third opening, for containing waste. In another embodiment, the storage chamber includes a bag. The bag may be securely attached to the base chamber below the third opening so as to receive waste passing through the third opening.
The upper lid moves between a closed position covering the first opening of the top chamber and an open position exposing the first opening. The lower lid moves between a closed position covering the second opening of the base chamber and an open position exposing the second opening. When the upper lid is in the open position, waste is received through the first opening into the top chamber. When the upper lid closes, the lower lid moves to the open position and the waste passes through the second opening into the base chamber. The waste then passes through the third opening of the base chamber into the storage chamber. In one embodiment, the upper lid pivots relative to the top chamber between the closed and open positions. In one embodiment, the lower lid may be hinged to the base chamber.
The drive mechanism is actuated so as to move the lower lid from the closed position to the open position when the upper lid moves toward the closed position from the open position. The lower lid returns from the open position back to the closed position when the upper lid is in the closed position. In one embodiment, the drive mechanism includes a pivot arm having a first end and a second end, and an actuator linkage interposed between the pivot arm and the upper lid. The actuator linkage includes an extension that engages with the first end of pivot arm and forces the pivot arm from a first position to a second position when the drive mechanism is actuated. The lower lid correspondingly moves from the closed position to the open position by force of the second end of the pivot arm on an engagement member of the lower lid. When the pivot arm reaches the second position, the extension of the actuator linkage releases its force on the pivot arm, and the lower lid automatically returns to the closed position. When the lower lid closes, the engagement member of the lower lid places force against the second end of the pivot arm to move the pivot arm back to the first position.
In one embodiment, the lower lid includes a counter weight that biases the lower lid in the closed position. When actuated, the drive mechanism overcomes the bias of the counter weight, and the lower lid is moved from the closed position to the open position by force of the pivot arm. When the extension of the actuator linkage releases its force on the pivot arm, the counter weight automatically returns the lower lid to the closed position and forces the engagement member of the lower lid against the second end of the pivot arm. The pivot arm is thereby moved back to the first position.
Further embodiments, features, and advantages of the present invention, as well as the structure and operation of the various embodiments of the present invention, are described in detail below with reference to the accompanying drawings in which like reference numerals are used to describe similar features.
The accompanying figures, which are incorporated herein and form part of the specification, illustrate a waste container. Together with the description, the figures further serve to explain the principles of the waste container described herein and thereby enable a person skilled in the pertinent art to make and use the waste container.
Reference will now be made in detail to embodiments of the present invention with reference to the accompanying figures, in which like reference numerals indicate like elements.
Top chamber 110 includes a first opening 112 for receiving waste when upper lid 120 is opened. Top chamber 110 may also contain a plurality of air fresheners and/or odor absorbers 114. In one embodiment, the plurality of optional odor absorbers 114 may be held in recesses 116 in top chamber 110 and fixed thereto by an attachment mechanism (not shown). For example, odor absorbers 114 may be interference fitted into recesses 116 or attached via clips, Velcro™, snaps or any other suitable attachment mechanism.
Base chamber 130 is coupled to top chamber 110 and includes a second opening 132 which is located at the top of base chamber 130 and which faces top chamber 110 opposite of first opening 112. Between first opening 112 and second opening 132 are walls 118 which define a chute for transferring waste therethrough. Base chamber 130 includes a third opening 134 disposed at the bottom of base chamber 130, opposite to second opening 132 and facing storage chamber 170. Between second opening 132 and third opening 134 are walls 146, which define a chute for transferring waste therethrough to storage chamber 170.
In the embodiment of
Upper lid 120 is disposed on top chamber 110 to selectively cover first opening 112. The upper lid may pivot relative to top chamber 110 by means of a hinge mechanism 122. Hinge mechanism may be mounted on a support 123 fixed to first portion 103 of housing 101. Upper lid 120 moves between a closed position (shown in
A lower lid 140 is disposed on base chamber 130 to selectively cover second opening 132. Lower lid 140 may be pivotally attached to base chamber 130 by means of a hinge mechanism 124. In particular, lower lid 140 moves between a closed position (shown in
Lower lid 140 may be biased in the closed position to hold waste in top chamber 110 until lower lid 140 is pivoted by pivot arm 152. For example, lower lid 140 may be biased in the closed position by a counter weight 144 (shown in
To facilitate the movement of upper lid 120 between the closed position and the open position, a foot-actuated mechanism 180, such as a conventional foot pedal, may be located at a base of waste container 100. In one embodiment, foot-actuated mechanism 180 includes a rod having a fulcrum at a pivot point P, with one end 180a of the rod extending laterally from housing 101 so as to be easily engaged by a foot of a user, and another end 180b of the rod joined to a linkage 182 mechanically coupling foot-actuated mechanism 180 with upper lid 120. Linkage 182 may include a top, middle, and bottom vertically extending linkage rods 182a, 182b, and 182c, respectively, which are mechanically coupled so as to transfer force from actuation of foot-actuated mechanism 180 to upper lid 120. As further described below with reference to
Description of operation of waste container 100 to dispose of a bag of waste 200 will now be described with reference to
As shown in
As shown in
As shown in
Storage chamber 170 holds waste until a user is ready to empty waste container 100. To facilitate emptying waste chamber 170, first portion 103 of housing 101 may be pivotally joined to second portion 104 by a hinge mechanism 105, shown in
To dispose of bag 160, a user may pivot first portion 103 away from second portion 104 to access bag 160. Since bag 160 is secured to base chamber 130, as described above, bag 160 will travel with the pivoting of base chamber and hang there from. The user may then grasp bag 160 below securing mechanism 162 to cinch it closed and pull securing mechanism 162 over flanges 136, in order to release bag 160 from the lower rim of base chamber 130. Where securing mechanism 162 is a hook-and-eye cord or includes a cord lock, a user may need to unfasten the hook-and-eye (or adjust the cord lock) to pull the cord over flanges 136. If a zip tie is used as securing mechanism 162, the user may have to cut the zip tie to disengage bag 160 from base chamber 130.
An embodiment of drive mechanism 150 and its operation will now be described with reference to
As shown in
Operation of drive mechanism 150 for opening lower lid 140 when upper lid 120 closes will now be described with reference to FIGS. 8 and 8A-8C, 9 and 9A-9C, 10, and 10A-10C. In
Pivot arm 152 then pivots to force opposite end 152b upwards in the direction of arrow U, causing end 152b to press against pivot pin 158 and move counterweight 144 upward. When counterweight moves upward, lower lid 140 pivots open in the direction of arrow O. Waste 200 then passes from top chamber 110 into base chamber 130 and falls into bag 160 as shown in
At the conclusion of its downward travel, latch 210 forces actuator hooks 192 against lower release tabs 228 (see
A top edge 164 of each side wall 161 and 169 is folded over and joined to respective side walls 161 and 169 to form a tube 166 around opening 167 of bag 160. Top edge 164 may be joined to respective side walls 161 and 169 (by stitching, adhesive, or more preferably, by heat sealing (seals shown in the figure as hatched marks)). Elastic cord 168 extends through tube 166, and tube 166 may open at one of edges 165, 165, whereby opposite ends of elastic cord 168 may exit tube 166 and tied together in a knot 168a. In one embodiment (not shown), an adjustable cord lock may secure ends of cord 168 together, whereby the cord lock may be used to tighten (or loosen) cord 168 around base chamber 130. In another embodiment (not shown), instead of elastic cord 168, a zip tie extends through tube 166, with the zip tie being tightened when bag 160 is secured to base chamber 130.
Each bottom portion 161a and 169a of side walls 161 and 169, respectively, folds over at a fold F. Bottom portions 161a and 169a are joined together along their bottom edges to form bottom edge 163, and are also joined along each portion 165a, 165a of respective side edges 165, 165. When bottom portions 161a and 169a are folded so that bag 160 lies flat, bottom portion 161a extends along an interior side of side wall 161, and bottom edge 163 extends above fold F, as shown in phantom in
While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not limitation. It will be apparent to persons skilled in the relevant art that various changes in form and detail can be made therein without departing from the spirit and scope of the present invention. Thus, the breadth and scope of the present invention should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
This application claims the benefit of U.S. Provisional Application No. 61/022,289, filed Jan. 18, 2008, the entire disclosure of which is incorporated in its entirety herein by reference thereto.
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