Wastewater screen filter and chain tensioner

A screen filter for wastewater applications, comprising:

• a first chain tensioner assembly configured to provide a first tensioning force for a first screen filter chain comprising:
• a slide plate configured to move axially with respect to the first screen filter chain;
• a torque arm attached to the slide plate and configured to mount a chain drive assembly;
• an abutment member attached to the slide plate;
• and
• a spring adjuster having at least one spring and configured to contact the abutment member to provide a bias force to the slide plate.

A method for making a screen filter for wastewater applications, comprising:

• making a first chain tensioner, wherein the making the first chain tensioner comprises:
• attaching a first 90° angle bracket to a first side wall;
• attaching a second 90° angle bracket to the first side wall;
• disposing a slide plate having a shaft mount between the first and the second 90° angle brackets, wherein the slide plate is configured to move axially with respect to the first side wall;
• attaching a spring adjuster comprising at least one spring onto the first side wall, wherein the spring adjuster is configured to provide a bias force to the slide plate, and wherein the shaft mount is configured to mount a shaft, and wherein the shaft is configured to drive a chain.