Back to results
US 6,441,533 B1Granted
Electric motor with commutator
AssigneeInterelectric AG
InventorsReimar Grosskopf, Frank Neumann
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeInterelectric AG
InventorsReimar Grosskopf, Frank Neumann
Estimating the term…
An electric motor comprising a commutator and lever brushes which resiliently press thereagainst and are pivotable about a pivot axis, a connection line which extends in a direction perpendicular to the pivot axis between the center point of a brush contacting surface and the pivot axis being tangential to the outer surface of the commutator. Such a brush assembly is to be made smaller in size. Each lever brush comprises a bearing bush rotatably arranged to be coaxial to the pivot axis, as well as a shaped body which is made from a conductive material and is firmly connected to the bearing bush. The shaped body forms the brush contacting surface and has a connection point which is in direct electrical contact with the brush contacting surface for electrically connecting the lever brush. The bearing bush is made from a material which is more stable than the shaped body.
An electric motor comprising in combination a commutator, lever brushes (6, 7) which resiliently press against said commutator and are pivotable about a pivot axis (B), a connection line (C) which extends in a direction perpendicular to said pivot axis (B) between the center point of a contact surface (24) of said brush and said pivot axis (B) being tangential to the outer surface of said commutator, each of said lever brushes (6, 7) comprises a bearing bush (20) rotatably arranged to be coaxial to said pivot axis (B), as well as a shaped body (21) which is made from a pressed conductive powder material and firmly connected to said bearing bush (20) and which forms the brush contacting surfaces (21) and includes a connection point (33) which is in direct electrical contact with said brush contacting surface (24) for electrically connecting said lever brush (6, 7), and that said bearing bush (20) consists of a more stable material than said shaped body (21).
An electric motor comprising in combination a commutator, lever brushes (6, 7) which resiliently press against said commutator and are pivotable about a pivot axis (B), a connection line (C) which extends in a direction perpendicular to said pivot axis (B) between the center point of a contact surface (24) of said brush and said pivot axis (B) being tangential to the outer surface of said commutator, each of said lever brushes (6, 7) comprises a bearing bush (20) rotatably arranged to be coaxial to said pivot axis (B), as well as a shaped body (21) which is made from a conductive material and firmly connected to said bearing bush (20) and which forms the brush contacting surfaces (21) and includes a connection point (33) which is in direct electrical contact with said brush contacting surface (24) for electrically connecting said lever brush (6, 7), and that said bearing bush (20) consists of a more stable material than said shaped body (21), and wherein said lever brush (6, 7) comprises a connection nose (33) which is adjacent to said bearing bush (20) and which extends in a direction transverse to said connection line (C) and has said connection point located thereon.
Dependencies are inferred from the claim text.