Abstract: A compact, easily transportable, surface preparation apparatus which includes a surface treatment unit having a cutter drum powered by its own power source. The apparatus includes transport/support wheels and a tow bar preferably interconnected at each end, of the surface treatment unit the rearward connection being a pivotal connection. The surface treatment unit has a longitudinal axis and a transverse axis, with the longitudinal axis perpendicular to the towing direction and the transverse axis coincident with the towing direction. The cutter drum has a rotational axis and is contained within the surface treatment unit and arranged such that the rotational axis is parallel to the longitudinal axis of the surface treatment unit. The cutter drum is off-set relative to the transverse axis of the surface treatment unit such that the cutter drum operates at one end of the surface treatment unit.

Abstract: A snow removal apparatus generally comprises a wheeled head frame coupled to a handle and further having a slide suspended between the wheeled head frame and the handle is herein disclosed. The head frame of the snow removal apparatus comprises a substantially rectangular base plate having side plates extending therefrom so as to support an axle upon which at least one wheel is rotatably mounted. A first end of the slide is secured to the axle of the head frame and the second end of the slide is attached to the handle at a distance from the head frame that is substantially greater than the width of the head frame.

Abstract: An indwelling urinary catheter having a palpitatable multi-axial dome-type discharge valve with protective shoulders. The protective shoulders are preferably raised above other unprotected portions of an outer surface of the valve. In preferred embodiments, the valve wall is made substantially of a first material and each of the protective shoulders include an elongated thickness of a second material which is more rigid than the first material. The valve has a peripheral trough to maximize drainage. Valve openings traverse an arcuate pathway, and adjacent valve elements are separated by an intermediate rib to ensure a reliable closure.

Abstract: An intravascular endocardial lead includes an electrically insulated flexible conductor having a lumen throughout the length thereof. A hollow connector element is connected to the proximal end of the conductor, and a hollow elongate electrode is connected to the distal end thereof. A helix assembly is positioned in the electrode and is longitudinally but non-rotatably movable from a retracted position to an extended position. A stylet is inserted through the lumen of the conductor to move the helix assembly to the extended position. Thereafter, when the conductor, electrode and helix assembly are rotated as a unit about the stylet, the helix assembly will penetrate and positively attach the lead to the body tissue and urge the electrode into engagement with the latter.