A brush device for an ultrasonic scaler. The brush device for an ultrasonic scaler may include a base portion having a first end portion and an opposing second end portion, wherein the first end portion and the second end portion define a longitudinal axis of the base portion; an insert portion formed at and extending from the first end portion of the base portion, wherein the insert portion is configured to be received in an opening in a distal end of the ultrasonic scaler for attaching the brush device thereto; and a cleaning element extending away from the second end portion of the base.

A brush head (32) including: a plurality of bristle tufts (21), each of which comprises a plurality of bristle strands having a free end (25) and a proximal end (23); a plurality of retention rings (50) each comprising an upper portion (51), a lower portion (53), an exterior wall (55) and an interior wall (57), and each configured to receive the proximal end of at least one of the plurality of bristle tufts, wherein at least one of the plurality of retention rings comprises a transverse projection (71, 72) extending from the exterior and/or interior wall of the retention ring; and an elastomeric matrix (30) comprising at least a portion of each of the plurality of retention rings and the proximal end of each of the plurality of bristle tufts.

A brush head (32) including: a plurality of bristle tufts (21), each of which comprises a plurality of bristle strands having a free end (25) and a proximal end (23); a plurality of retention rings (50) each comprising an upper portion (51), a lower portion (53), an exterior wall (55) and an interior wall (57), and each configured to receive the proximal end of at least one of the plurality of bristle tufts, wherein at least one of the plurality of retention rings comprises a transverse projection (71, 72) extending from the exterior and/or interior wall of the retention ring; and an elastomeric matrix (30) comprising at least a portion of each of the plurality of retention rings and the proximal end of each of the plurality of bristle tufts.

A hair care device for use in untangling hair includes a body portion and a plurality of substantially parallel flexible bristles made of soft plastics material and projecting from the body portion. The bristles are arranged such that over at least a part of the area of bristles, some of the bristles are of shorter length. The bristles and the shorter length bristles are interspersed over the at least part of the area of bristles.

A hair care device for use in untangling hair includes a body portion and a plurality of substantially parallel flexible bristles made of soft plastics material and projecting from the body portion. The bristles are arranged such that over at least a part of the area of bristles, some of the bristles are of shorter length. The bristles and the shorter length bristles are interspersed over the at least part of the area of bristles.

A brush head assembly comprising: a hard platen; a plurality of bristle tufts, each of which comprises a plurality of bristle strands, each bristle tuft having a proximal end and a free end; and a flexible matrix at least partially comprised of a shear-thickening material for coupling the plurality of bristle tufts to the hard platen, wherein the flexible matrix is arranged such that there is shear-thickening material between the proximal ends of the plurality of bristle tufts and the hard platen. A method of manufacturing the brush head assembly for use with a personal care appliance.

A method for cleaning a coke deposit from an internal surface of a process equipment, comprising removing at least a portion of the coke deposit from the internal surface using a flexible pig comprising a plurality of bristles, without damaging a metal protective layer of the internal surface of the process equipment. A flexible pig for cleaning a coke deposit from an internal surface of a process equipment without damaging a metal protective layer of the internal surface, comprising a flexible body formed of a polymeric material, and a plurality of bristles partially encapsulated by the polymeric material of the flexible body.

A method for cleaning a coke deposit from an internal surface of a process equipment, comprising removing at least a portion of the coke deposit from the internal surface using a flexible pig comprising a plurality of bristles, without damaging a metal protective layer of the internal surface of the process equipment. A flexible pig for cleaning a coke deposit from an internal surface of a process equipment without damaging a metal protective layer of the internal surface, comprising a flexible body formed of a polymeric material, and a plurality of bristles partially encapsulated by the polymeric material of the flexible body.

A brush head (32) including: a supporting portion (42) of a brush neck (40); a plurality of bristle tufts (21), each of which comprises a plurality of bristle strands having a proximal end (23) and a free end (25), wherein each of the plurality of bristle tufts comprises a proximal end head portion (26) melted into a first shape within a mold; and an elastomeric matrix (30) comprising at least a portion of the hard brush neck and the proximal end head portions, wherein the first shape of the proximal end head portion is configured to engage the elastomeric matrix such that the bristle tufts are retained within the elastomeric matrix.

A brush head (32) including: a supporting portion (42) of a brush neck (40); a plurality of bristle tufts (21), each of which comprises a plurality of bristle strands having a proximal end (23) and a free end (25), wherein each of the plurality of bristle tufts comprises a proximal end head portion (26) melted into a first shape within a mold; and an elastomeric matrix (30) comprising at least a portion of the hard brush neck and the proximal end head portions, wherein the first shape of the proximal end head portion is configured to engage the elastomeric matrix such that the bristle tufts are retained within the elastomeric matrix.