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Text version of the page 
Text version of the page 
How the RPS Works The RPS system achieves its incredible performance by using a pinion consisting of suppliers of bearing supported pins that engage a unique tooth profile. Two or more rollers engage the rack teeth in opposition at all times eliminating backlash. There is no tooth slap as with traditional rack and gear, instead the RPS rollers approach the tooth face in a tangent path and then roll smoothly down the tooth face. This provides a smooth, quiet, low friction, fatigue free, high efficiency rotary to linear motion conversion. The RPS tooth design is conceptually different from traditional rack and pinion designs. It behaves like a cam and follower versus the typical sliding spur pinion used with traditional rack and pinion. As illustrated in the figures below, a cycloidal curve is created when a point drawn on a circle at point “P” rolls on a flat plane without slipping. When multiple points are placed on the circle at regular intervals, the cycloidal curves are repeatedly created on the flat plane, and develop into a tooth like profile. A roller then is placed at each point P to act as pinion teeth and modifies the tooth profile to create the rack teeth. Normally, this concept will not provide zero backlash, but a technical innovation was developed to modify the tooth geometry allowing two rollers to remain loaded in opposition at all times eliminating the backlash as the rollers engage the rack. As you can see, the rollers meet the rack smoothly and eliminate the tooth slap, sliding friction, fatigue, noise, and low precision associated traditional rack and pinion. Both the rollers and teeth are hardened for exceptionally long service lives. PP' Rollers inOpposition 4
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