Abstract: This document discloses an improved fluid-pressure rotary actuator. The described rotary actuator is especially useful for opening and closing milling machine vises, or fixtures, in a power-dense configuration. In this way, the described rotary actuator delivers a high actuation torque and infinite rotation, which is especially useful for programmable opening and closing of milling machine vises over a wide travel range.

Abstract: A fluid pressure vise actuator includes a housing and an inner bore of the housing. A piston is disposed in the housing, and the piston is configured to actuate based on a pressure increase in ports of the housing. A gear is also disposed in the inner bore of the housing, and a portion of the gear is adjacent to the piston such that an actuation of the piston is configured to rotate the gear. The gear includes a socket configured to interface with a vise and operate the vise based on a rotation of the gear. The housing also includes adjustable clamping blocks configured to engage with the vise to provide support for the housing during operation. An adjustment of the clamping blocks enables the fluid pressure vise actuator to interface with multiple types of existing vises.

Abstract: A fluid pressure vise actuator includes a housing and an inner bore of the housing. A piston is disposed in the housing, and the piston is configured to actuate based on a pressure increase in ports of the housing. A gear is also disposed in the inner bore of the housing, and a portion of the gear is adjacent to the piston such that an actuation of the piston is configured to rotate the gear. The gear includes a socket configured to interface with a vise and operate the vise based on a rotation of the gear. The housing also includes adjustable clamping blocks configured to engage with the vise to provide support for the housing during operation. An adjustment of the clamping blocks enables the fluid pressure vise actuator to interface with multiple types of existing vises.