A wave driven variable leverage pump for water desalination is disclosed. According to one embodiment, a variable leverage pump comprises a platform and a paddle comprising at least one lever arm extending therefrom. The at least one lever arm is pivotally coupled with the platform. The pump further comprises a pump having a first end pivotally coupled with the platform, and a second end pivotally coupled with the paddle. A pivot point of the at least one lever arm is located above a pivot point of the pump relative to the platform.

An example apparatus to prevent side load in hydraulic override pumps includes a lever rotatably mounted to a support. The apparatus includes a pump cylinder rotatable about a first end of the pump cylinder. The apparatus also includes a pump rod operatively coupled to the lever to move within the pump cylinder based on rotation of the lever. The pump cylinder rotates when the pump rod moves within the pump cylinder.

A pump unit (1a) comprising a cavity (6a) defined by an immobile part (17), a reciprocating part (16), and a top element (18) sealing the cavity to define a chamber. The top element is fixedly attached to a scrolling piston wall (5a), slidably disposed within the cavity to move perpendicularly relative the chamber, dividing it in two sealed subchambers, the chamber following the reciprocating parts component of the piston wall, along the immobile part. Each subchamber has inlets and outlets on the immobile part, that are alternately exposed and covered as the reciprocating part and the piston wall moves.

Apparatus that prevent side load in hydraulic override pumps are disclosed herein. An example apparatus includes a lever rotatably mounted to a support, a pump cylinder rotatable about a first end of the pump cylinder, and a pump rod operatively coupled to the lever to move within the pump cylinder based on rotation of the lever, wherein the pump cylinder rotates when the pump rod moves within the pump cylinder.

A pump unit (la) comprising a cavity (6a) defined by an immobile part (17), a reciprocating part (16), and a top element (18) sealing the cavity to define a chamber. The top element is fixedly attached to a scrolling piston wall (5a), slidably disposed within the cavity to move perpendicularly relative the chamber, dividing it in two sealed subchambers, the chamber following the reciprocating parts component of the piston wall, along the immobile part. Each subchamber has inlets and outlets on the immobile part, that are alternately exposed and covered as the reciprocating part and the piston wall moves.

A wave driven variable leverage pump for water desalination is disclosed. According to one embodiment, a variable leverage pump comprises a platform and a paddle comprising at least one lever arm extending therefrom. The at least one lever arm is pivotally coupled with the platform. The pump further comprises a pump having a first end pivotally coupled with the platform, and a second end pivotally coupled with the paddle. A pivot point of the at least one lever arm is located above a pivot point of the pump relative to the platform.

The present application provides a nutating pump assembly for pumping a fluid. The nutating pump assembly may include a nutating pump and an air vent chamber assembly in fluid communication with the nutating pump.

A wave driven variable leverage pump for water desalination is disclosed. According to one embodiment, a variable leverage pump comprises a platform and a paddle comprising at least one lever arm extending therefrom. The at least one lever arm is pivotally coupled with the platform. The pump further comprises a pump having a first end pivotally coupled with the platform, and a second end pivotally coupled with the paddle. A pivot point of the at least one lever arm is located above a pivot point of the pump relative to the platform.