Bin with a quieter-closing lid

Patent No. US6758366 (titled "Bin with a quieter-closing lid") on Feb 21, 2001. The application was issued on Jul 6, 2004.

’366 is related to the field of waste collection containers, specifically large-capacity bins equipped with pivoting lids. It addresses the mechanical and acoustic challenges associated with heavy lids slamming against the vessel body, which typically causes significant noise and structural wear over time.

The underlying idea behind ’366 is to utilize the air trapped within the vessel as a natural pneumatic cushion to decelerate the lid during the final stages of closure. By creating a specific geometric path at the interface of the lid and the vessel, the invention forces escaping air to navigate a series of sharp turns, effectively using fluid resistance to build internal pressure that opposes the lid's downward momentum.

The claims of ’366 focus on a structural arrangement where the lid and vessel feature overlapping, substantially vertical surfaces that form an air-flow baffle. This configuration requires the air to turn at least twice through narrow gaps—typically less than 50 millimeters—located at the front and sides of the bin to ensure the braking effect is strongest just before contact.

In practice, this is achieved by integrating an inner skirt on the underside of the lid that drops into the vessel opening, working in tandem with the vessel's upper rim or an additional outer skirt. As the lid descends to within a few degrees of closing, these vertical members interlock to create a high-impedance exhaust path. This restricted geometry ensures that the faster a user attempts to slam the lid, the higher the resulting backpressure, providing a self-regulating damping effect.

This approach differs from prior solutions that rely on mechanical friction brakes in the hinges or perishable rubber bumpers, both of which degrade with use. By using a non-contact labyrinth seal design, the invention provides a maintenance-free braking system that remains consistent throughout the bin's lifespan. Unlike simple single-rib baffles, the multi-turn requirement ensures sufficient head loss in the airflow to significantly reduce the acoustic impact of the lid hitting the vessel frame.

How does this patent fit in bigger picture?

Technical Landscape

In the early 2000s when ’366 was filed, waste collection containers were typically implemented using pivoting lids that relied on mechanical damping or physical barriers to manage closure forces. At a time when systems commonly relied on external rubber abutments or friction-based hinges to mitigate noise and impact, hardware constraints made the consistent regulation of lid velocity non-trivial due to the inevitable wear and degradation of contacting components. Engineering practices for large-capacity vessels generally accepted the noise generated by lid-to-vessel contact as a standard operational characteristic, as existing pneumatic solutions were often limited to simple vertical ribs that failed to provide sufficient air resistance to effectively decelerate the lid during the final stages of closure.

Prosecution Position

The disclosed invention represents a technical advancement through an architectural shift in how pneumatic resistance is generated within a waste vessel to achieve noise reduction. By configuring the lid and vessel with nested, substantially vertical surfaces—such as inner and outer skirts that interleave with vessel ribs or collars—the design forces escaping air to undergo at least two directional changes. This structural integration creates a labyrinthine path that significantly increases internal air pressure as the lid approaches the closed position, enabling a self-regulating braking effect that increases in intensity with the force of the closure. This arrangement overcomes the technical constraint of component wear associated with mechanical dampers while providing a constant, maintenance-free deceleration capability that remains effective throughout the lifetime of the bin.

Claims

The patent contains a total of 0 claims, with no independent claims identified. Consequently, there is no specific focus for independent claims, and dependent claims do not serve a role in further defining or limiting any primary inventive subject matter.

Key Claim Terms New

Definitions of key terms used in the patent claims.

Term (Source)	Support for Specification	Interpretation
Inner wall (Claim 1)	The lid has an inner wall or skirt on its inside surface, which is preferably shaped to engage inside the vessel when the bin is closed. The spacing between the inner wall and the main walls of the vessel can lie in the range 2 mm to 50 mm. It is of sufficient height to begin opposing the departure of air while the lid is open at an angle of about 2.5°.	A downwardly extending structural member located on the inside surface of the lid, positioned to enter the interior space of the vessel upon closing.
Outer skirt (Claim 1)	Advantageously, the lid has an outer skirt. In various embodiments, the outer skirt of the lid extends around a rib of the vessel or rests against a collar when the bin is closed. It may also be arranged to engage in a channel or surround a crenellation-shaped portion of the vessel collar.	A peripheral downward extension of the lid situated radially outward from the inner wall, designed to overlap or interface with the vessel's exterior or collar.
Raised pressure (Claim 1)	The air leaving the vessel is forced to turn at least twice between vertical surfaces so as to encourage the creation of raised pressure inside the vessel. This raised pressure tends to brake the displacement of the lid towards its closed position. The intensity of this braking effect increases when the lid is slammed down harder against the vessel.	An increase in air pressure within the vessel cavity caused by the restricted escape of air through a convoluted path during the final stage of lid closure.
Substantially vertical surfaces (Claim 1)	The lid and the vessel are arranged in such a manner that the air leaving the vessel during closure is forced to pass between substantially vertical surfaces belonging respectively to the lid and to the vessel. These surfaces are preferably spaced apart by less than 50 millimeters (mm). This arrangement encourages the creation of raised pressure inside the vessel to brake the displacement of the lid.	Opposing structural faces belonging to the lid and the vessel that align in a near-vertical orientation when the lid is proximate to the closed position to restrict air flow.
Turn at least twice (Claim 1)	The lid and the vessel are arranged in such a manner that the air leaving the vessel during closure of the lid and when the lid is close to its closed position is forced to turn at least twice. This is achieved by forcing the air to pass between substantially vertical surfaces belonging respectively to the lid and to the vessel. This forced path occurs at least at the front of the lid, and preferably all round the four edges.	A requirement for the air exit path to include at least two changes in direction, created by the interlocking or overlapping geometry of the lid and vessel structures.

Litigation Cases New

US Latest litigation cases involving this patent.

Case Number	Filing Date	Title
4:25-cv-00503	May 22, 2025	Simplehuman Llc V. Hms Manufacturing Company Llc

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US6758366

Application Number: US09788579A
Filing Date: Feb 21, 2001
Publication Date: Jul 6, 2004
External Links: Slate, USPTO , Google Patents

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