Abstract: A pipette tip member having an elongated tubular receptacle with a protrusion on an inner surface of the receptacle, and a recess on the inner surface adjacent the protrusion. The tip member has a generally conical shape and the protrusion extends around the inner surface to form an annular sealing ring. The protrusion has a V-shaped axial cross section with edges that intersect at an angle between about 30° and about 120°. The recess has a generally circular axial cross section and the recess is disposed proximal to the protrusion in the axial direction. The recess depth is about as great as the protrusion height. A method of forming a pipette tip member is also disclosed.

Abstract: An animal deterrent system to be placed on structures such as electrical apparatus to deter and protect birds, wildlife and other animals. Specifically, a perching deterrent having a saddle made to fit over any desired member of a structure and deterrent extensions may be used separately or in combination. The deterrent extensions may protruded in various configurations from the above-mentioned saddle to inhibit, deter, or insulate animals contacting structures. Also an insulator cap with spiral conductor covers.

Abstract: A pipette tip member having an elongated tubular receptacle with a protrusion on an inner surface of the receptacle, and a recess on the inner surface adjacent the protrusion. The tip member has a generally conical shape and the protrusion extends around the inner surface to form an annular sealing ring. The protrusion has a V-shaped axial cross section with edges that intersect at an angle between about 30° and about 120°. The recess has a generally circular axial cross section and the recess is disposed proximal to the protrusion in the axial direction. The recess depth is about as great as the protrusion height. A method of forming a pipette tip member is also disclosed.