| 摘要 |
<p>A linear motion resistance cell particularly for use on an exercise machine comprising a hydraulic piston (6, 7) and cylinder (1) assembly filled with hydraulic fluid and provided with controllable ports in the piston between a rotatable disc (8) and piston flanges (6) and (7). The ports are opened and closed by rotation of the disc (8) relative to the piston, actuated by diametrically opposed pairs of magnets (10, 11) in the disc aligned with corresponding pairs of magnets (12, 13) in a collar on the outside of the cylinder (1).</p> |
