Abstract: A laundry cart and methods for using it are described herein. The laundry cart has the ability to dump laundry from its shelves to the bottom surface of the laundry cart via rotatable shelves, eliminating the need to remove laundry from each shelf. In addition, the rotatable nature of the shelves allows the shelves to effectively close the laundry cart for effective transportation of laundry, minimizing spillage of laundry out of the laundry cart during transit.

Abstract: The present disclosure relates to a workstation and a technique to automatically configure the workstation. The workstation can be used to perform various tasks including but not limited to medication delivery, collection of medical records, patient care, manufacturing operations, and others. The workstation can be configured by the user depending on the tasks to be performed using the workstation. Various sensors (e.g., hall effect sensors, optical sensors, or the like) can be coupled to the workstation, and sensor operators (e.g., magnets, color coded strips, or the like) can be coupled to the modules. By aligning sensor operators with sensors when modules are coupled to the workstation, a configuration (e.g., size, shape, location, or the like) of modules can be automatically detected by the workstation controller. The controller of the workstation can then adapt to perform certain tasks (e.g., lock/unlock drawers, or the like) depending on the detected configuration of modules.

Abstract: A novel waste bin carrier (100) is proposed for carrying at least one waste bin (200). The waste bin carrier (100) includes a frame (110) having a base (130) for receiving thereon one waste bin (200) or more. The waste bin carrier (100) also has a locking mechanism (120) movably attached to the frame (110) for releasably securing at least one waste bin (200) to the waste bin carrier (100). The locking mechanism (120) has a pusher guide (121) that extends in a first horizontal Cartesian dimension (X) for lateral engagement with the waste bin (200). The locking mechanism also has at least one articulated arm (122) that connects the pusher guide (121) to the frame (110) of the waste bin carrier (100) for allowing movement of the pusher guide (121) in respect to the frame (110) between the deployed state and the released state.

Abstract: A seat adapter removably mounts a child seat to a wagon having two opposing walls and an interposed connecting wall, and includes two latch components that mount to the wagon's opposing walls. In some embodiments, the seat adapter includes a cross-member extending between the latch components so that the cross-member provides structural integrity to the wagon if the connecting wall is displaced from its upright use position. In some embodiments, the seat adapter and the child seat can be mounted to the wagon for use with the connecting wall in its upright use position, and in some embodiments the seat adapter and the child seat can be mounted to the wagon for use whether the connecting wall is in its upright use position or its displaced position, with no mechanical interference between any part of the wagon and any part of the adapter or the child seat mounted to it.

Abstract: A battery recycling method used to recycle used batteries from one or more cell sites includes uniquely identifying and marking the used batteries at the one or more cell sites; packaging and removing the used batteries from the one or more cell sites to a staging facility; packaging the used batteries from a plurality of cell sites at the staging facility with a insulation material; providing the packaged used batteries from the plurality of cell sites to a recycling facility; tracking the used batteries at each foregoing step; and providing a recycling certificate to an operator of the one or more cell sites evidencing successful recycling of the used batteries.

Abstract: A collapsible wheeled walker with two side frames and two height adjustable upper body supports. The apparatus includes a plurality of wheel direction locks each coupled to a wheel and adapted to lock the wheel in fixed moving direction or to release the wheel to turn freely. The apparatus may include a seat that is slidably attached to the two side frames and is movable between a front position for walking inside the frames and a rear position sitting. The apparatus may be converted to a transport chair by locking front wheel and releasing the rear wheels, and sliding the movable seat to the rear position. It may include an X-folder that facilitates collapsing the walker to a small footprint. It may also include two forearm gutters as part of the upper body supports that give the user an upright walking posture for health benefits.

Abstract: A collapsible wheeled walker with two side frames and two height adjustable upper body supports. The apparatus includes a seat that is slidably attached to the two side frames and is movable between a front position to facilitate an ample walking space inside the frames and a rear position for a user to sit. The apparatus may include an X-folder that facilitates collapsing the walker to a small footprint for storage and transportation. It may also include a left forearm gutter and a right forearm gutter as part of the upper body supports that give the user an upright walking posture for health benefits.

Abstract: Method and apparatus for a floatable and collapsible cart having a storage compartment formed by a framed assembly with waterproof material mounted thereon. Floatation material is disposed in the bottom of the storage compartment and front and rear ground contacting wheels are provided below and in line with the opposite sides of the storage compartment which may be converted between a folded position and an unfolded position. Objects may be loaded into the storage compartment and pulled by a user on the surface of the water between a boat and the seashore and then rolled along the seashore. A pull cord is provided for pulling the wagon.

Abstract: The utility cart of the present application comprises a frame, at least two wheels and a storage panel. In one embodiment, the storage panel is removable and capable of being replaced with an alternate storage panel.

Abstract: A modular cart that includes a main cart, a first modular cart frame, and a second modular cart frame is described. The main cart further includes a handle end with a first base component that is mechanically coupled to at least one caster. The main cart also includes a first bar disposed on a distal end of the first base component that extends to a second base component, in which the first bar is orthogonal to the second base component and the first base component. A first bay perimeter is bounded by the first base component, the first bar and the second base component. The main cart further includes a second bay perimeter is bounded by a second base component, a second bar and a third base component.

Abstract: A roll container is suitable for transporting post, namely letters. The novel roll container includes two opposing parallel side wall frames, wherein the front ends of the side wall frames define the width of the front opening of the roll container. The roll container also includes a door, and a hinge which connects the door to one of the side wall frames. The door includes a lower portion and an upper portion which is arranged slidably to tracks provided to the lower portion. The roll container further includes a device configured to lock the upper portion of the door to the front end of the side wall frames at different heights.

Abstract: A luggage article may include a plurality of walls together defining an outer structure of the luggage article, a wheel bracket attached to and extending from one of the walls, and a wheel attached to the wheel bracket. The wheel bracket may comprise first and second elongate arms extending along a common side of the wheel. The first and second arms may be vertically-spaced apart from one another over at least a portion of the length of the first and second arms. The configuration of the wheel bracket may result in higher shock absorption and reduced wheel noise comparative to conventional wheel brackets, and offer an improvement and alternative to conventional luggage wheel brackets.

Abstract: A multi-use vehicle assembly provides a means for entertainment and mobilization. The vehicle assembly includes a frame assembly having a first frame coupled to a second frame. The frame assembly has a center frame coupled to and extending between the first frame and the second frame. A plurality of wheels is coupled to the frame assembly. The plurality of wheels comprises a left back wheel, a right back wheel, and a central front wheel. The left back wheel is coupled to the first frame. The right back wheel is coupled to the second frame. The central front wheel is coupled to the center frame. A steering mechanism is coupled to the frame assembly. The steering mechanism is mechanically coupled to the central front wheel. A drive system is operationally coupled to one of the plurality of wheels.

Abstract: A laundry basket including: a frame structured wall; a top lid; at least one notch on a first side of the top lid; a hinge on a second side of the top lid, where the hinge provide a means to open and close the top lid on the basket; and a handle extending from one side of the basket. The handle may be a retractable telescoping handle, where the handle extends from the basket on a side adjacent to the first side of the top lid. The at least notch one may include two notches, where the two notches lie between the breadth of the handle. The laundry basket may further include four wheels under the basket for movement.

Abstract: Systems and methods for transporting an object on a carriage in tandem with a wheeled case are presented. A carriage in one embodiment includes a generally planar platform supported by one or more rolling members, a fence strap for holding the seat against a fence that extends upwardly from the platform, and an anchor strap connecting the seat to the wheeled case. The carriage may be used to transport any object or seat, such as a child safety seat. In another embodiment, the platform includes a leading section connected to a trailing section. The trailing section may include an opening that is sized shaped to receive at least a portion of the rolling members therethrough when the two sections are folded together.

Abstract: A tool cart caddy suitable for carrying a tool cart as well as tools and materials at a construction site moves easily around a construction site. An especially successful version of this tool cart caddy is as a transport or another cart, such as a cart for an electrician or plumber to transport the required tools and materials around the construction site. The tool cart caddy has a base can both support a cart and carry additional tools or materials. The lower base is generally rectangular with a caster, preferably a lockable caster, mounted at each corner thereof. Thus, the tool cart caddy can be moved on the casters, with the casters being locked or unlocked as desired.

Abstract: A vertical tool box including a vertically disposed frame having a pocket between the front and rear sides thereof. A first tool support panel is positioned in said pocket and is selectively horizontally slidably movable between stowed and tool presentation positions. A second tool support panel is also positioned in said pocket and is selectively horizontally slidably movable between stowed and tool presentation positions. When the first and second tool support panels are in their tool presentation positions, the first tool support panel is positioned laterally of one side of the frame and the second tool support panel is positioned laterally of the other side of the frame.

Abstract: A service cart for an aircraft is disclosed with a housing of carbon fiber reinforced composites forming a multi-compartment carrier, the carrier adapted to hold four standard airline meal carriers. The cart includes at least a pair of cap doors at opposite ends of the cart, each cap door pivoting approximately 270 degrees to bear against a side of the cart, and a plurality of guides on inner walls of the multi-compartment for retaining the standard airline meal carriers. To prevent the doors of the cart from inadvertently opening, the cart also may include a redundant paddle latch system for each door.

Abstract: A container includes a body having base wall and a side wall extending upward from the base wall. The body includes a bracket portion having an elongated slot. An axle extends through the elongated slot. The axle is slidable in the elongated slot between a deployed position and a retracted position. A wheel is connected proximate one end of the axle. A clip secures the axle within the elongated slot.

Abstract: A multi-function cart for storing and transporting emergency or other supplies. The multi-function cart comprises a shell and lid or two shells that can be secured together to form a transportable storage container. When separated, each shell is convertible into various configurations that can be used to sustain life during and after a disaster as well as to clean up and rebuild after a disaster has occurred. In this manner, the multi-function cart enables victims to quickly care for themselves, and encourages victims to immediately begin the clean-up and rebuilding process. The multi-function cart can also be used recreationally. Each shell is convertible into different configurations using various tubes. Hub brackets on opposing sides of the shell include adapters to which any of the tubes can be connected. The tubes can be connected to the adapters in an upward or a downward orientation to form different configurations.

Abstract: A wheeled cart and a method for moving large and/or heavy objects along the ground which comprises a pair of main wheels mounted on an axle, a pair of side frames located between the main wheels and an open front basket mounted between and fixedly connected to the side frames. The object is loaded onto a support plate of the basket. The support plate is then raised by a power unit after which the basket can be rotated upwardly and rearwardly about the axle so as to place the weight of the object closer to or over the axle. A power source is provided for lifting the support plate and for driving the wheeled cart, both forwardly and rearwardly.

Abstract: A computer cart has removable electrical connector management system which may be removed from the computer cart to install portable electronic device electrical transformers, and then reinserted into the computer cart to enable multiple electrical transformers to be installed into the cart as a group. An electrical charging system uses a staggered round robin approach to control distribution of power within the computer cart without requiring the amount of power used from each power strip to be individually monitored.

Abstract: A transportation dolly for transporting tools, such as Measurement While Drilling (MWD) tools, is provided. The dolly includes a base plate with a front end, a rear end, a top surface, and a bottom surface. A plurality of wheels may be attached to the bottom surface. A cradle forming a channel within may be attached to the top surface. A plurality of dollies may be linked together. The channel may be shaped and sized to receive the MWD tool. Therefore, the MWD tool may be strapped to the plurality of dollies and transported in a safe manner.

Abstract: A transport system for transporting at least one item of goods to be transported includes a base unit, at least one transportation unit for moving the transport system, and at least one transport goods area for accepting the at least one item of goods to be transported. The at least one transportation unit is surrounded on at least two different sides by the at least one transport goods area.

Abstract: A box with a wheel assembly platform has a tow strap with a folded position stowed in a recess in the platform and an unfolded position accessible outside the box. In one embodiment, the strap is incorporated in a pre-assembled handle pack positioned in the recess. The strap may be retracted by a torsion spring, and may be coiled in the pack by use of a rotating fork. In one embodiment axles projecting from rollers are supported in recesses formed in the platform, and in another embodiment the axles are supported in notches in the bottom end of cylinders mounted in cutouts in the platform. In a further embodiment a box has hand holes in opposite walls with a spacer panel providing finger access behind the holes. The platform may have hinged panels. A thermoformed skin may be applied to the platform or constitute the platform.

Abstract: Latch assemblies and children's products that include the latch assemblies are disclosed herein. The children's products may include a children's ride-on vehicle. The children's ride-on vehicle may include a vehicle body, a plurality of wheels, and a hinged assembly that is coupled to the vehicle body. The hinged assembly may include a base member, a hinged member, and a latch assembly that is configured to selectively retain the hinged assembly in a closed orientation. The latch assembly may include a female member, a male member that is configured to be selectively interconnected with the female member, and a guide structure. The guide structure may be configured to direct the male member and the female member into an aligned orientation from which the male member may be received within the female member.

Abstract: A mobile point-of-sale system includes a cart frame and a battery housed in the cart frame. The cart frame includes a front having a bottom, a back having a bottom edge and a bottom. The bottom includes a pair of upper flanges and a lower housing. The pair of upper flanges have components for receiving wheels for supporting the cart frame and the lower housing includes at least one aperture for venting heat from the battery that is supported by the lower housing. At least a portion of the lower housing and the battery are located below the pair of upper flanges and are located below the bottom edges of the front and the back.

Abstract: A transport carrier or case for storing and/or transporting a partially disassembled bicycle is disclosed. The carrier includes means for mounting the partially disassembled bicycle to a base while providing for adjustment of the mounting means dependent on the size of the bicycle. Also disclosed are wheel retention means for releasably mounting the wheels of the bicycle to one side of the transport case, and isolation means to separate the bicycle frame from the wheels.

Abstract: The disclosed universal paint tray cart has a top surface for setting various sizes of paint trays on, wheels for moving the universal paint tray cart and one or more paint tray coupling devices. Each paint tray coupling device is coupled to a slot opening in the universal paint tray cart body. Each paint tray coupling device has a first end that is coupled to the slot opening of the universal paint tray cart, and a second end which couples to a paint tray. The paint tray coupling devices hold the paint tray to the universal paint tray cart so that the cart and the paint tray can be moved about without the paint tray falling off of the universal paint tray cart. The paint tray coupling devices slide along the length of the slot openings to adjust to the size of the paint tray being held.

Abstract: The present invention provides a complex deodorizing trash can characterized in that a housing cover comprises a smaller dispose opening with a lifting cap to facilitate the dispose of smaller garbage and an air vent with a nano-silver gas filter covered by a cover board for exhausting unpleasant odor and preventing bacteria breeding; an anti-fall rod at front of the main housing can prevent it from slipping into a garbage truck; slip-preventing pads at bottom front of the main housing can prevent sliding thereof due to wind or tilted ground; a drainage opening at bottom rear of the main housing comprises a magnetic protruding drain valve and a foot pedal protrusion lift actuator for cleaning purposes; attachment holes on the push mechanism at top rear of the main housing allow two or more trash cans to combine to form a complex trash can combination for the dispose of different types of garbage.

Abstract: A paper roll cart for storing, holding for usage, and transporting a variably-sized roll of paper includes a wheeled base, a paper roll support that is rotationally mounted to the wheeled base, a paper roll securing mechanism coupled to the wheeled base for releasably anchoring the paper roll to the cart, and a cart movement control system attached to the wheeled base for assisting in the movement of the paper cart from one location to another location.

Abstract: The specification discloses a high-profile, low-volume trash/recycling cart that is compatible with existing pick-up equipment and includes a reduced volume. The cart includes a container and a pedestal supporting the container. The pedestal increases the overall height of the cart to be conveniently handled by existing automated handling equipment. The container can be separated from the pedestal and used as a standalone refuse container. Additionally, wheels may be included on the container to provide a rolling standalone container. Alternatively or additionally, when the pedestal is separated from the container, the pedestal can be fitted with a handle to provide a utility cart.

Abstract: A child's active transportation device comprising: a steering rod permanently or removably affixed to a wheel base, said wheel base having a platform and mechanism or device for affixing a plurality of wheels to said wheel base, and also having a plurality of wheels and associated equipment and method of use.

Abstract: An all terrain floating accessories buggy including oversized tires and a tubular, hollow frame disposed around a mesh base, wherein said oversized tires and hollow frame displace a volume of water having mass enough to ensure positive buoyancy of the all terrain floating accessories buggy when porting an extant cooler stocked with cargo through water of a depth exceeding the radius of the oversized tires.

Abstract: Pallet box assembly configured as planter box or workman's utility box is disclosed. The pallet box assembly includes a pallet base, two side panels, a front panel, and a rear panel, which are collapsible and reusable. Pallet base has tenon joint parts with locking mechanisms that extend out. Pallet base has an opening extending therethrough for ease of handling by pallet jack or hand truck. The side panels include grooves. Front and rear panels include tenon joint part with locking mechanism. The side panels are identical and interchangeable, the front panel is identical and interchangeable with the rear panel. Each locking mechanism includes a winged bolt threadedly inserted and engaged into the tenon joint part, and a wing which is rotated by about 45 to 135 degrees to engageably and securely attach the corresponding tenon joint part in the corresponding groove, so that the pallet box assembly is securely installed.

Abstract: A utility truck with arched reinforcing rods incorporated into the base of a plastic truck during molding. The reinforcing rods are held in place in a mold at a predetermined distance above the mold's inner surface by spacers attached to the ends of the rods. Plastic is molded around the rods, with more plastic provided below the rods than above them, so that, when the plastic truck is removed from the mold and allowed to cool, the plastic will contract to a greater extent than the metal rods, causing the base and the reinforcing rods to bow upward, creating a convex arch in the truck's base. The arch provides an inherently strong, bridge-type structure that substantially strengthens the load-bearing capability of the truck, yet requires less reinforcing material than conventional supplemental chassis structures. In another embodiment, caster base mounts are also molded into the bottom of the truck, providing a utility truck with a unitary chassis structure.

Abstract: This is a wheel kit attachment apparatus for the hand operating of a duffel bag or a golf bag comprising of two parts, a handle and a single piece platform with wheels. Both parts mount to a bag by drilling ¼? hose and fasten with plastic tree fastener or shield retainer. The handle comprises of a strap with eyelets or grommets, and a rubber tube for a hand grip. The platform comprises of a one piece body made of metal or plastic two wheels two axels and spacer washers. Both handle and platform mount with the tree fastener or shield retainer. The key part of this kit is the shape of the body that when the bag is tipped back the body lift up for ground clearance and the wheels have a pitch and tow in of 2 degrees or greater witch gives it a better tracking for the short wheel base. Also the wheels are large enough to work and small enough to fit a golf bag in a golf cart.

Abstract: A system and device for use in a security area, and more particularly, a rack system and holding device for placing various objects that are processed through a security area are taught.

Abstract: A recreational cart assembly is provided for facilitating transportation of multiple items desired for use at a recreational site such as a park or beach. The assembly includes a basket having a back panel, a bottom panel, a front panel, and a pair of side panels. The side panels extend between the front panel and the back panels. The bottom panel extends between the side panels and between the front panel and the back panel. A plurality of wheels and a handle are coupled to the basket. The basket also has a plurality of openings. A collapsible chair is provided having a hook. The hook is inserted through and engages an opening in the basket whereby the chair is coupled to the basket.

Abstract: A luggage case (100, 600, 700, 800, 900) may include opposing sidewalls forming minor faces (105, 106), opposing sidewalls forming major faces (101, 102), and opposing end walls (103, 104) together forming an article defining an enclosed space (109). A line of separation (150) may be formed in said minor faces (105, 160) and end walls (103, 104). A first portion of the line of separation (150) may extend along a first portion of opposing minor faces (105, 106) at a location proximate one of said opposing major faces (101, 102) and corresponding one of said opposing end walls (103, 104) positioned therebetween. A second portion of the line of separation (150) may extend along a second portion of said opposing minor faces (105, 106) in a direction away from said one of said opposing major faces (101, 102) and towards other of said opposing major faces (101, 102).

Abstract: A lightweight, easy-to-assemble, and portable cart for the performance of peritoneal dialysis is disclosed. The cart includes a top shelf, bottom shelf, and at least four adjustable connecting members or legs. The top shelf has a top surface designed to receive a PD cycler, and at least one hook to hang bags of solution. Various components of the cart include a plastic and foaming agent additive.

Abstract: A storage container (1) has a hollow storage box (10) and a lid (12). The lid (12) includes wheels (14) which enable the storage container (1) to be used as a ride-on toy by a child.

Abstract: A cart is provided for mounting a portable ultrasonic diagnostic device, the cart being small in size and having high operability, and the portable ultrasonic diagnostic device is opened and used in the state of being kept mounted on the cart. The cart has a top board 1 for placing the portable ultrasonic diagnostic device thereon, a support column 2 for supporting the top board in such a manner as movable up and down, multiple legs 3 for supporting the support column, wheels 4 respectively attached to the legs, and a unit 5 having a predetermined function. The unit 5 is placed below the top board 1 in the rear of the support column 2, and the center of gravity of the cart is positioned in the rear of the center of the support column 2. This cart has a simple configuration enabling downsizing, and it is high in operability. It is possible to open and use the portable ultrasonic diagnostic device in the state that the portable ultrasonic diagnostic device is kept mounted on the cart.

Abstract: The invention is directed to a work station for use in performing processing of patient samples, storing equipment and drugs in a hospital and the like, the cart having a lower housing having caster wheels mounted on the bottom thereof, the lower housing having angular-shaped side panels therearound which may be opened for entrance into all sides of the housing, and one or more of the side panels; an upper housing mounted on top of the lower housing, the upper housing having one or more side panels therearound; and one or more work areas mounted on top of the upper housing, the shelf adapted for receiving point-of-care equipment.

Abstract: A sidewall panel of a barrel cooler has a sidewall panel body forming a first vertical edge and a second vertical edge. The sidewall panel has a latch arm protruding from the first vertical edge of the sidewall panel body, wherein the latch arm is adapted to cooperatively connect with a latch box of a first adjacent sidewall panel of the barrel cooler. The sidewall panel also has a latch box flush along the second vertical edge of the sidewall panel body, wherein the latch box is adapted to cooperatively connect with a latch arm of a second adjacent sidewall panel of the barrel cooler. The sidewall panel may be included in a system of parts that are adapted to cooperatively couple together to form a barrel cooler. The sidewall panel may also be included in an assembled barrel cooler.

Abstract: A portable container for carrying one or more janitorial liquids as well as janitorial supplies and equipment is disclosed. The janitorial container includes one or more closable bottom drain openings for fast and convenient draining of the janitorial liquids. The container also includes one or more attachment members for receiving, supporting, and/or securing the janitorial supplies and equipment. The container may be mounted on a wheeled cart as a part of a multi-tasking cleaning system. Methods for using the container, either independently or as mounted on the cart, to improve the efficiency and safety of janitorial operations are also disclosed.

Abstract: A dolly includes a horizontal base plate supported by wheels and first and second upstanding support walls supported by the base plate. In a first embodiment, a horizontal step is formed in each support wall above the plane of the base plate and an item of sheet material is supported on its edge by the step. This enables a single individual to rotate the sheet material onto a countertop without lifting the sheet material from the dolly. In a second embodiment, an adjustable support bracket is movably mounted to each support wall to replace the steps so that the sheet material can be supported on edge at various heights. A third embodiment adds a foldable table with legs so that the sheet material can be rotated onto the table and slid from the table onto a surface to be covered.

Abstract: A rollable paint bucket which will be maneuvered on a floor by the painter manipulating an extended handle of a paint roller assembly is disclosed. The bucket will have a body, a plurality of rolling members and a structural configuration which permits placement of the paint roller on the bucket where it will remain in contact during maneuvering of the bucket on the floor by the painter. The body has a paint containment area and a rolling surface. The painter may easily replenish fresh paint on the paint roller and roll the paint roller to obtain a desired quantity and uniformity of coverage on the paint roller. The bucket permits the painter to paint a large area, along a great distance, while remaining standing straight. This eliminates the conventional need for the painter to manually move their supply of fresh paint which often involves bending or squatting.

Abstract: A transport chair enables one person to provide mobility to two passengers simultaneously. The transport chair can include two seats, allowing a care giver to provide a fast, safe and less stressful solution for providing mobility to multiple passengers. The transport chair can collapse similar to a conventional wheelchair to provide for ease of storage.

Abstract: The present invention relates to a detachable roller means and a movable bag or case having said detachable roller means, said roller means comprises a roller seat (1) and a roller assembly, which are detachably connected to each other. The roller seat has a penetration opening (1-1) and a guide in which a spring-pretensioned button plate (2-10) is guided. Said button plate has a button arm (2-3), by means of which the button plate is displaceable along the guide. The roller assembly has a roller holder and a roller (3). The roller holder is provided on its upper side with a lug boss (2-5) and a shaft (2-8) projecting from the lug boss. The shaft is provided with an upper stop (2-9). In a mounting status, the lug boss is abutted against the bottom of the roller seat tightly and, viewed in the insertion direction of the shaft, the button plate is engaged behind the upper stop in a spring-pretensioned manner.