Abstract: Described herein are systems, devices, and methods for removing material from patient vasculature. In some embodiments, an aspiration device may include a sheath and a catheter slidably disposed within the sheath and defining a lumen. The catheter may include a distal end portion and an elongate portion, the distal end portion being disposable adjacent to a clot, the elongate portion being couplable to a vacuum source that is configured to apply a negative pressure to the lumen to draw the clot into the distal end portion. The distal end portion may include a plurality of sections, each of the plurality of sections having a different cut pattern.

Abstract: A commutator including a support sleeve, a plurality of commutator segments equiangularly spaced around the support sleeve, said segments being electrically insulating from one another and each having a base region of dovetail form having its widest end presented to the sleeve. Integral with the sleeve adjacent one axial end thereof is a first retaining flange which defines a first internal frusto-conical surface coacting with one inclined face of the base region of each of said segments to locate the segments axially and raidally relative to the sleeve. The sleeve is deformed outwardly adjacent its axial end remote from said flange to resist movement of the segments axially of the sleeve away from said flange.

Abstract: A commutator including a support sleeve, a plurality of commutator segments equiangularly spaced around the support sleeve, said segments being electrically insulating from one another and each having a base region of dovetail form having its widest end presented to the sleeve. Integral with the sleeve adjacent one axial end thereof is a first retaining flange which defines a first internal frusto-conical surface coacting with one inclined face of the base region of each of said segments to locate the segments axially and radially relative to the sleeve. The sleeve is deformed outwardly adjacent its axial end remote from said flange to resist movement of the segments axially of the sleeve away from said flange.