An actuator includes a piston and a housing. The piston includes a piston shaft that is configured to reciprocate within a chamber of the housing. The actuator includes a gland electrically coupled to the housing. The gland forms at least a portion of a first end of the chamber. The actuator also includes a first conductor positioned in the chamber. The first conductor is coupled to the gland and to a first side of the piston to electrically couple the piston to the housing.

A cover for a rod end of an actuator comprises a mounting collar for surrounding and mounting to a portion of the rod end. The collar is deformable such that it may be mounted over a rod eye mounted to the rod end. The cover further comprises a shield extending from the collar and shaped such that when attached to the rod end the shield shields a portion of rod end to prevent fluid or foreign object ingress to the rod end.

Provided are an efficient energy-saving return cylinder of a hydraulic press and a working method thereof. The efficient energy-saving return cylinder of a hydraulic press comprises a plurality of single-rod return hydraulic cylinders symmetrically distributed at two sides of a main hydraulic cylinder of the hydraulic press, the plurality of single-rod return hydraulic cylinders are divided into several groups, each of the groups consisting of one balancing cylinder and one driving cylinder; a rod chamber of the balancing cylinder is communicated with an accumulator, the pressurized oil in the accumulator is filled into an oil chamber of the balancing cylinder, so that the balancing cylinder balances the weight of a walking beam and a working part of the walking beam; the driving cylinder is differentially connected; in the process of neutral-stroke-rapid-descending and ascending-returning of the walking beam and the working part of the walking beam.

Systems and methods for an effective solution to MR safe actuation in all MRI-guided (robot-assisted) procedures are provided. The present integrated hydraulic transmission method or system uses piston-based cylinders (101,102,201,308(C1), 309(C2), 310(C3), 402, 501) to provide continuous bi-lateral rotation with unlimited range in an MRI environment. Positional and torque control can also be achieved. The system includes a master unit and a slave unit each comprising: a plurality of cylinders (101,102,201,308(C1), 309(C2), 310(C3), 402, 501), a piston (105,301,302,303,401,502) inserted within the bottom surface of each cylinder (101,102,201,308(C1), 309(C2), 310(C3), 402, 501), a seal positioned with each cylinder (101,102,201,308(C1), 309(C2), 310(C3), 402, 501) between the piston (105,301,302,303,401,502) and the top surface of the cylinder (101,102,201,308(C1), 309(C2), 310(C3), 402, 501) to inhibit a fluid from passing across the seal, and a plurality of tubes (103) connecting the master unit cylinders and slave unit cylinders (402).

Disclosed herein is a cover for a rod end of an actuator. The cover comprises a mounting collar for surrounding and mounting to a portion of the rod end. The collar is deformable such that it may be mounted over a rod eye mounted to the rod end. The cover further comprises a shield extending from the collar and shaped such that when attached to the rod end the shield shields a portion of rod end to prevent fluid or foreign object ingress to the rod end. Also disclosed is a rod end assembly comprising a rod end and a cover mounted thereto and a method of assembling and retro-fitting a rod end and cover.

The subject matter of this specification can be embodied in, among other things, a fluid actuator system including a fluid actuator having a housing having an inner wall defining an interior cavity, a piston having a piston head configured for reciprocal movement within the interior cavity, the piston head contacting the inner wall and dividing the interior cavity into a first fluid chamber and a second fluid chamber, a first valve configured to control fluid flow between the first fluid chamber and a bypass conduit, and a second valve configured to control fluid flow between the bypass conduit and the second fluid chamber.

A hydraulic cylinder is provided with a cylinder tube, a piston unit, and a piston rod. The piston unit has a piston body; packing mounted on the piston body; a holding member mounted on the piston body; and a magnet held by a magnet holding part of the holding member. The magnet holding part has a notch that is open on the outer circumferential surface of the holding member.

Provided are an efficient energy-saving return cylinder of a hydraulic press and a working method thereof. The efficient energy-saving return cylinder of a hydraulic press comprises a plurality of single-rod return hydraulic cylinders symmetrically distributed at two sides of a main hydraulic cylinder of the hydraulic press, the plurality of single-rod return hydraulic cylinders are divided into several groups, each of the groups consisting of one balancing cylinder and one driving cylinder; a rod chamber of the balancing cylinder is communicated with an accumulator, the pressurized oil in the accumulator is filled into an oil chamber of the balancing cylinder, so that the balancing cylinder balances the weight of a walking beam and a working part of the walking beam; the driving cylinder is differentially connected; in the process of neutral-stroke-rapid-descending and ascending-returning of the walking beam and the working part of the walking beam.

Provided are a non-metallic position sensor for electromagnetic compatibility testing, a device and a system for automatic antenna positioning. The non-metallic position sensor includes a cylinder body, a piston, and a piston rod; a side wall of a cylinder body lower chamber is provided with a first radial air hole, a second radial air hole arranged on the lower end of the first radial air hole, and a third radial air hole arranged axially symmetrically with the first radial air hole; when the piston rod moves to a first position, the first radial air hole is communicated with the third radial air hole, the non-metallic position sensor send a first air pressure signal outwards; when the piston rod moves to a second position, the first radial air hole is communicated with the second radial air hole, the non-metallic position sensor send a second air pressure signal outwards.

Provided are a non-metallic cylinder for electromagnetic compatibility testing, a rotary angle adjustable antenna device, and a rotary angle adjustable antenna system. The rotary angle adjustable antenna device provided by the present disclosure includes a non-metallic cylinder, a first adapting piece, and an antenna; the antenna is mounted in the first mounting hole with a rotary sleeve arranged outside, at least one end of the antenna extends out of the first mounting hole; the first adapting piece is further provided with a second mounting hole, the first piston rod of the non-metallic cylinder is placed in the empty slot of the first adapting piece after passing through the end cover of the non-metallic cylinder then passing through the second mounting hole of the first adapting piece; the first piston rod of the non-metallic cylinder is connected with the rotary sleeve.