The invention relates to a pool cleaning apparatus including: a cleaning unit (100), at least one hydraulic system for circulating a liquid between at least one liquid inlet (103) and at least one liquid outlet (104) and through a filtration device of the cleaning unit (100), a pump suitable for forcing the circulation of water between the liquid inlet (103) and the liquid outlet (104) and through the filtration device, drive and guide means for moving the cleaning unit, and means for controlling said drive and guide means. The pool cleaning apparatus includes at least one debris detection means placed in the hydraulic system of the cleaning unit (100).

A filtration system for a vacuum cleaner to clean swimming pools. The filtration system includes a filtration cartridge to filter fine debris and a watertight flexible bag to collect bulky debris. The filtration cartridge is attached inside the watertight flexible bag by at least one tubular sleeve. The sleeve passes through the flexible bag and gripping it against at least one end of the filtration cartridge in a watertight manner.

A swimming pool cleaner may include motive elements intentionally driven in an unbalanced manner. This unbalanced driving may allow a cleaner to maintain contact with (“hug”) walls of a pool, allowing the cleaner to, e.g., obtain information allowing mapping of the pool perimeter.

A self-contained electrically powered and fully submersible swimming pool vacuum includes a vacuum head having a housing with an elongate vacuum mouth at a bottom end, a discharge opening at an opposite top end and a thrust channel extending therebetween. An electrically powered motor is supported within the thrust channel and drives a propeller to create a thrust through the housing from the vacuum mouth through the thrust channel and out from the discharge opening. A catch bag is removably secured to the top discharge opening for collecting debris sucked through the vacuum mouth. The vacuum includes an onboard power supply, a smart power switch for driving the motor at different speeds and for detecting and clearing motor jams, all contained within a watertight housing fixed to an outer side of the vacuum housing. In one embodiment, the onboard power supply is a lithium ion rechargeable battery.

A suction pool cleaner, including a housing, an impeller, a driving member, a first baffle plate and a second baffle plate. The housing has a water inlet and a water outlet. The impeller is located in the housing between the inlet and the outlet. The driving member includes a main body and a drive shaft arranged thereon. The impeller is sleeved on the drive shaft, and the driving member drives the impeller to rotate around the drive shaft to generate a suction force. The first baffle plate is located in the housing between the impeller and the inlet, and an axis of the drive shaft passes through the first baffle plate. One end of the second baffle plate is connected to an end of the impeller near the main body, and the other end is adjacent to the main body.

Methods and apparatus are disclosed for an improved underwater vacuum cleaning system. Urging elements are provided on a vacuum head to encourage debris, especially large pieces of underwater debris, to matriculate under the head or otherwise toward the vacuum opening, rather than traveling over the head or otherwise NOT toward the vacuum opening. Various embodiments of engagement elements are disclosed between the vacuum head and a vacuum hose to improve the connection therebetween.

An automatic pool cleaner comprising a housing and a base. The housing comprises a suction flow pathway, an impeller disposed within the housing and in fluid communication with the suction flow pathway such that water traveling through the suction flow pathway spins the impeller, wherein spinning of the impeller causes the pool cleaner to move forward, an off-center cam that extends through the impeller and is configured to rotate as the impeller rotates, and two spring biased valves. Each valve comprises a valve seat, and a spring biased poppet configured to seal against the valve seat, the poppet having a rod with a spring disposed around the rod. The base comprises two feet, each foot having a spring-biased pad extending from each end of the foot, two A-arm assemblies, one for each foot, and a suction port that extends through the base.

A swimming pool cleaner may operate within a pool during a cleaning cycle. The duration of the cleaning cycle may be tailored, or optimized, for the pool by determining a maximum length of time between, for example, a rotation of the cleaner and when it next detects a wall of the pool during a designated interval. As another example, deducing information relating to rotation speed of the cleaner also may be useful in determining the tailored cleaning cycle.

An electrically powered pool cleaner may include a housing defining an axial passageway. A rotatable sleeve impeller may be supported by the housing within the axial passageway. The axial passageway may include an unobstructed central portion for passage of fluid and pool debris therethrough into a filter bag removably connected to the housing. A motor may be operatively connected to the sleeve impeller and a power supply operatively connected to the motor. Rotation of the sleeve impeller may accelerate fluid flow through the axial passageway for drawing into the filter bag. The pool cleaner may include a rigid cover enclosing the filter components. The rigid cover may include a handle for handheld operation of the pool cleaner.

An apparatus for removing sediment from a pond includes: a handle; a vacuum unit connected to the handle, said vacuum unit having a first opening adapted for receiving material sucked into said opening and a second opening for material sucked into said vacuum unit to exit at a point outside said pond, said vacuum unit being submersible, supported by at least one wheel, and having an aperture for receiving a mixture from a bottom of the pond; a hose associated with said second opening; and a storage container, said storage container having a body and a storage film cartridge adapted to be positioned in said body, said cartridge having storage film therein, said storage film being permeable to water and having a mesh, and a sealing mechanism having an actuator operably connected to said cartridge, wherein actuation of said actuator rotates said cartridge causing said storage film to seal.