Abstract: A propeller for attachment to a rotatable output shaft of a submersible motor includes a hub having a first end, and an opposite second end, an outer curved surface, at least two blades extending radially outward from the outer curved surface and a central axial bore for receipt of the output shaft therethrough. The hub includes an arrangement of discharge channels extending between the first and second ends to allow waterflow and debris (e.g., grass, weeds and other stringy items) to pass through the hub and exit the second end without becoming entangled around the base of the motor output shaft.

Abstract: A collaborative web-based computing system includes a plurality of client computers interacting with a web-based application server. Interposed between the application server and the plurality of client computers is a communication server employing eXtensible Messaging and Presence Protocols (“XMPP”). A channel is created between one of the client computers and the communications server and thereafter a session with the application server is initiated. Responsive to the creation of a web-based session between at least one client and the application server, other client computers can request to join the session via separate channels with the communication server. Data from the application server is pushed from the application server to each of the client computers simultaneously via the communication server. Client computers do not actively pull information from the communications server but are rather receptive to data that is being pushed down the existing channel.