A drawbar assembly having a first continuous drawbar having an open end, a closed end, and an elongate body extending therebetween along an axis, and a spring anchor formed at the open end; a second continuous drawbar having an open end, a closed end, and an elongate body extending therebetween along the axis, and a spring anchor formed at the open end; the first and second drawbars oriented with respect to each other such that at least a portion of each elongate body overlaps with the other along the axis and the open end of one drawbar is proximate the closed end of the other; and a compression coil spring positioned over the overlapping elongate body portions and secured at each end by a respective spring anchor; wherein a region of at least one closed end is coined.

A device for covering a surface including a substantially rectangular cover (10) having first and second longitudinal edges each provided with a protruding convex bead (12) having a minimum diameter (d), two rails (6) including a groove, the opening (14) of which has a maximum width (Lo), a drum (2) that is able to move above the surface in order to deploy or retrieve the cover, an insertion system (16) for continuous insertion of the convex bead (12) into the groove. The convex bead (12) of each longitudinal edge and the groove of the corresponding rail are configured such that, once inserted into the space (14e) by the insertion system, the convex bead occupying the space alone cannot be removed solely by the action of a force (F) applied parallel to the transverse axis (Y) in the direction of the surface to be covered.

An inflatable pool cover, including a main body to cover a pool, an inflatable bladder disposed on at least a portion of the main body to store air therein, such that the main body floats on water in the pool in response to the inflatable bladder being inflated with the air to a predetermined air level, and an air transfer unit, including an air channel connected at a first end to at least a portion of the inflatable bladder to direct movement of the air to or from the inflatable bladder, and a cap connected to at least a portion of a second end of the air channel to prevent the air from escaping the inflatable bladder in a closed position, and facilitate movement of the air through the inflatable bladder and the air channel in an opened position.

Siphon assembly and method of use thereof to drain water from a pool cover. The siphon assembly includes a pad of fibrous threads surrounded by air spaces. An intake member embedded in the pad includes multiple inlets and one outlet. A hose is engaged with the intake member. When the pad is submerged in the water, a siphoning action set up in the hose sucks water through the pad’s air spaces, into the intake member’s inlets, through the outlet, and into the hose’s bore. The fibrous threads prevent debris in the water from reaching the inlets and clogging them. Water is sucked into the pad’s interior from multiple directions and providing at least one pad surface is not exposed to air or blocked by debris, the siphon assembly will continue to drain water therethrough until all of the inlets of the intake member are exposed to air.

A water release valve is disclosed for a pool safety cover on a swimming pool. An example water release valve includes an upper valve body and a lower valve body. The lower valve body is attached to the upper valve body through an opening formed in the pool safety cover. A valve actuator is configured to automatically open to release at least some water on top of the pool safety cover into the swimming pool to reduce water accumulation on top of the pool safety cover. In an example, the valve actuator automatically opens under the weight of the water on top of the pool safety cover. In an example, more than one water release valve may be provided at various locations on the pool safety cover.

A water release valve is disclosed for a pool safety cover on a swimming pool. An example water release valve includes an upper valve body and a lower valve body. The lower valve body is attached to the upper valve body through an opening formed in the pool safety cover. A valve actuator is configured to automatically open to release at least some water on top of the pool safety cover into the swimming pool to reduce water accumulation on top of the pool safety cover. In an example, the valve actuator automatically opens under the weight of the water on top of the pool safety cover. In an example, more than one water release valve may be provided at various locations on the pool safety cover.

A pool cover assembly includes a first encapsulation member defining a first side of a pool cover encapsulation, the first encapsulation member comprising a first mating feature. The pool cover assembly further includes a second encapsulation member defining a second side of the pool cover encapsulation, the second encapsulation member comprising a second mating feature. And the pool cover assembly further includes a corner endcap member comprising a third mating feature and a fourth mating feature. The first encapsulation member is coupleable to the corner endcap by the first mating feature and the third mating feature, and the second encapsulation member is coupleable to the corner endcap by the second mating feature and the fourth mating feature. The corner endcap member couples with the first encapsulation member and the second encapsulation member to form a corner of the pool cover encapsulation.

The present invention relates to a pneumatic structure (10) comprising an inextensible body (12) defining at least a network of internal cavities (14), each cavity having a closed contour in at least one section of the cavity

Each cavity being suitable for being pressurized so as to change the inextensible body from a rest configuration to at least one pressurized configuration,

Inextensible body having, in each pressurized configuration, a macroscopic metric different from its macroscopic metric in the rest configuration,

Each cavity being formed of at least two substantially rectilinear channels, each channel being fluidly connected to at least one of the other channels, the two said channels forming a heading change angle,

Each cavity comprising at least one non-zero heading change angle, in particular at least three non-zero heading change angles.

A floatable flexible sealed waterproof cover for pools, made of a flexible waterproof bottom sheet, a flexible waterproof upper sheet and several rods made of a foam material. The bottom sheet and the upper sheet are welded to each other on their four sides. The upper sheet and the bottom sheet are connected by a number of lines that construct hollow sleeves between them and the rods are inserted into the sleeves.

A pool cover for temperature regulation of pool water having an upper sheet of flexible material and a lower sheet of flexible material. The sheets are joined together at their side edges and along a plurality of longitudinally seams to form a panel having a plurality of longitudinal seams to provide a plurality of flow channels. A pump attached to an input tube draws in water from the pool, and via an input manifold forces the pumped water through the flow channels in the panel, and out the ends of the flow channels back into the pool. Pool water pumped through the flow channels picks up heat from incident solar radiation and the ambient air temperature, or gives off heat to the ambient environment, depending on the temperature of the air, the amount of incident radiation, and the temperature control settings provided by the user.