Patent ID: 7353748

Claim:
A linear actuator comprising: a main cylinder body which is formed with cylinder chambers communicated with fluid inlet/outlet ports; a slider which reciprocates in an axial direction of said main cylinder body and which has a flat surface section disposed substantially in parallel to said axis and a bent section formed and bent at an end of said flat surface section; a guide mechanism which includes a guide rail formed along said axis of said main cylinder body, and a plurality of rolling members which make rolling movement along rolling grooves formed on side surfaces of said guide rail and said slider opposed to said guide rail, said guide mechanism guiding said slider in said axial direction of said main cylinder body; and a recess which is formed on a side of said bent section on said flat surface section opposed to said guide rail, which is communicated with a pair of said rolling grooves of said slider, and which has a widthwise dimension perpendicular to an axis of said slider, said widthwise dimension being larger than a spacing distance between one of said pair of said rolling grooves and another of said pair of said rolling grooves.