The present invention provides a rotating machine which can maintain good contact state between the brush and the metal rotating body. A rotating machine of the present invention includes a stator including a stator winding, a rotor including a rotor winding and rotatably disposed apart from the stator with a gap, a metal rotating body electrically coupled with the rotor winding, a brush in contact with the metal rotating body, and a pressing mechanism for increasing pressure to press the brush against the metal rotating body when contact failure occurs between the metal rotating body and the brush.

An isostatic brush holder (10) comprises a central body (12), one or more arms (14, 14) rotationally disposed in proximity of the opposite ends of said central body (12), and defining a first and a second end (16, 16), and a plurality of brushes (20) cooperating with at least one elastic element (22), where said arms (14, 14) define the respective first ends (16) of quick release snap catches (24, 24), said arms being pivoted to each other at the second ends (16), said arms being further connected in a swivelling manner and in proximity to said second ends (16) at the opposite ends of said central body (12).

Embodiments of the invention provide a pump comprising a lower housing, a diaphragm assembly, an upper housing, a valve housing, and an o-ring. The diaphragm assembly is positioned adjacent to the lower housing. The upper housing is positioned adjacent to the diaphragm assembly and includes an inlet chamber and an outlet chamber separated by a ring. The valve housing is positioned between the upper housing and the diaphragm assembly, encloses the inlet chamber and the outlet chamber, and includes a cutout in contact with the ring. The ring includes raised outer walls to receive the cutout and the o-ring is positioned between the raised outer walls of the ring and secured between the raised outer walls by the cutout.

An electric motor is provided including: a stator, an armature rotatably received within the stator and having an armature shaft on which a commutator is mounted, and a brush assembly. The brush assembly defines a first surface facing the stator and a second surface opposite the first surface. The brush assembly includes a brush card mount having openings, brushes in sliding contact with the commutator to supply electric current to the commutator, and thermally-conductive brush holders that house the brushes. Each of the brush holders includes a base portion disposed substantially along a same plane as a surface of the brush card mount to form the first surface of the brush assembly, and a main portion protruding from the base portion through a respective opening of the brush card mount to house a respective brush at least partially over the second surface of the brush assembly.

A motor includes a commutator having segments, and feeding brushes which successively come into sliding contact with the segments. One of the plurality of feeding brushes is a first feeding brush with an electric resistance value that varies in a rotation direction of the commutator. The rest of the feeding brushes are second feeding brushes with a constant electric resistance value in the rotation direction. The first feeding brush includes a high resistance portion disposed in a part including a forward end portion of the first feeding brush in the rotation direction, and a low resistance portion arranged side-by-side with the high resistance portion in the rotation direction. The electric resistance value of the second feeding brushes is higher than that of the low resistance portion.

A brush holder apparatus includes a stationary support member having at least one groove, a fork electrical connector, and a conductive bar configured to pass through a portion of a main body of the stationary support member. The conductive bar provides electrical conductivity with a collector mount and fork electrical connector. A brush holder is releasably affixed to the stationary support member, and has at least one rail that slides along the groove(s). The brush holder has a knife electrical connector that mates with the fork electrical connector. A brush spring is clipped on the brush holder, and presses a brush against a collector of a dynamoelectric machine. The brush spring is replaceable in the brush holder. The brush spring or brush holder has a friction enhancing material attached to an area where the brush spring attaches to the brush holder.

A contact brush holder is disclosed. According to an aspect, a brush holder is provided for receiving at least two contact brushes and holding the brushes in contact with a slip ring in an electrical power device. The brush holder comprises a holder body adapted for receiving said brushes. The brushes are arranged on opposite sides of a plane in which a central axis of the brush holder is located and in which an axis of rotation of the electric apparatus is situated. A biasing device is provided for biasing the holder body towards the slip ring, thus biasing the at least two contact brushes towards the slip ring.

The disclosed invention is a slip ring assembly that provides electrical power transfer to centrifugal turbomachinery while minimizing or eliminating the presence of wires in the flow path. The device transfers electrical power through a set of wires connected to a plurality of brushes that are held rotationally stationary, but allowed to displace axially or radially through a set of springs. The brushes make contact with conductive busbar rings, transferring electricity to the busbar rings. The busbar rings rotate with the centrifugal turbomachine with a set of wires that connect the busbar rings to the blades or other aerodynamic surfaces of the centrifugal turbomachine.

A brush holder apparatus has a stationary support member having two opposing grooves, a fork electrical connector, and a conductive bar configured to pass through a portion of a main body of the stationary support member. The conductive bar provides electrical conductivity with a collector mount and the fork electrical connector. A brush holder is configured to be releasably affixed to the stationary support member, and has two rails configured to slide along the grooves. The brush holder has a knife electrical connector configured to mate with the fork electrical connector. A brush spring is clipped on the brush holder, and the brush spring presses a brush against a collector of a dynamoelectric machine. A brush lead is connected to the brush and a brush terminal. The brush lead is an elongate conductive member, and a brush wear indicator is disposed over the brush lead.

A brush holder apparatus includes a stationary support member having at least one groove, a fork electrical connector, and a conductive bar configured to pass through a portion of a main body of the stationary support member. The conductive bar provides electrical conductivity with a collector mount and fork electrical connector. A brush holder is releasably affixed to the stationary support member, and has at least one rail that slides along the groove(s). The brush holder has a knife electrical connector that mates with the fork electrical connector. A brush spring is clipped on the brush holder, and presses a brush against a collector of a dynamoelectric machine. The brush spring is replaceable in the brush holder. The brush spring or brush holder has a friction enhancing material attached to an area where the brush spring attaches to the brush holder.