Minnesota Mining and Manufacturing Company

3m Innovative Properties Company

Cherne Industrial, Inc.

Mandel L Desnick

Gerald R Porter

Kenneth L Penttila

Leonard J Boler

Brian J Kompelien

A method of spin welding a fastener to an article and such an article. In a preferred mode, a method of spin welding a fastener to a surface conditioning treating article is disclosed. The fastener comprises a generally planar base including a first side, a second side, and a drive member extending from the second side. The surface treating article comprises a working surface adapted to treat a workpiece surface, and a back surface, the back surface comprising an open woven scrim. The first side of the fastener base is melt-bonded by the spin weld method to the open woven scrim of the surface treating article.

Method for attaching a fastener to a surface treating article, and such

An article made by spin welding a fastener to the article. In a preferred mode, a method of spin welding a fastener to a surface conditioning treating article is disclosed. The fastener comprises a generally planar base including a first side, a second side, and a drive member extending from the second side. The surface treating article comprises a working surface adapted to treat a workpiece surface, and a back surface, the back surface comprising an open woven scrim. The first side of the fastener base is melt-bonded by the spin weld method to the open woven scrim of the surface treating article.

Article made by spin welding a fastener thereto

A stethoscope having a binaural with dual sound-transmitting tubes adapted to deliver sound to a human ear, with each tube having an ear tip connection end having a plurality of flanges thereon. Removably attached to the described tubes are a pair of ear tips formed of a non-porous elastomeric material having a channel therein having a plurality of molded-in recesses adapted to engage the flanges in complementary fashion.

Ear tips having molded-in recesses for attachment to a stethoscope

An apparatus for steady-state volume rate flow control from a variable depth liquid having a floating weir assembly of the type with an inlet weir crest over which liquid may flow from said weir crest to a discharge opening through which liquid may flow from said weir. In one form, the weir assembly has a pressure responsive flow control means. When said pressure responsive flow control means is active, said means opposes the buoyancy of said floating weir to position said inlet crest of said weir at a selected distance below the surface of said variable depth liquid independent of the depth of said liquid to establish a steady-state volume rate of liquid flow from said weir. At other times, when said pressure responsive control means is inactive, the buoyancy of said floating weir positions said inlet crest of said weir above the surface of said variable depth liquid independent of the depth of said liquid to establish a zero rate of liquid flow from said weir. A preferred weir assembly has an open-topped circular weir crest, with its circular edge concentric with a first horizontal axis, and with the weir crest supported at one end of a vertically swinging support arm which has its other end arranged for support and swinging movement around a parallel second horizontal axis.

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St. Louis Park, MN, United States of America

Mandel L Desnick