The Timken Company

Richard A Knepper

Xiaolan Ai

William E Harbottle

Gary L Doll

Keith M Gordon

Tadao Tsuneyoshi

Bradley Mularcik

Thomas Underwood

Don Remboski

Brad Mularcik

Neal C McBain

Chris Van Dress

Xiaolan Al

Jay M Landry

A mechanical structure () for enabling a rotor () in a permanent magnet electric motor A to be moved axially relative to a stator () under an actuating force, without experiencing frictional sliding during such a movement. As the rotor () is moved away from the stator (), the motor magnetic field is weakened, enabling the motor A to operate efficiently at elevated speeds, extending speed coverage under constant power.

Electric motor with axially movable rotor assembly

A traction drive transmission has an outer ring, a sun roller, support rollers, and one or more loading rollers. The outer ringincludes a racewaypresented inwardly. The sun rollerincludes a racewaypresented outwardly toward the racewayof the outer ring. The sun rolleris offset eccentrically with respect to the outer ringso that a wedge gapexists between the racewaysof the outer ringand sun roller. The support rollersare located between the outer ringand sun roller. Each support rollerhas first and second racewaysthat have different diameters and contacts the racewayof the sun rolleralong its first racewayand the racewayof the outer ringalong its second raceway. Each loading rolleris located at the wedge gapbetween the racewayof the outer ringand the racewayof the sun roller. Each loading rollerhas first and second circular racewaysthat have different diameters and contacts the racewayof the sun rolleralong its first racewayand the racewayof the outer ringalong its second raceway

High ratio eccentric planetary traction drive transmission

An electric motor comprising a rotor, a stator and a field weakening device. The rotor has a plurality of magnets mounted thereto, and the stator is located adjacent to the rotor and has a plurality of slots defined therein. The slots define raised teeth and are wound with electrical wiring to generate a magnetic field when the wiring is energized with current. The field weakening device is made from a highly magnetically permeable material and a comparatively lower magnetically permeable material. The field weakening device is disposed between the rotor and the stator and is selectively movable between a first position to align the highly magnetically permeable material between the teeth of the stator and the magnets of the rotor and a second position to align the comparatively lower magnetically permeable material between the teeth of the stator and the magnets of the rotor.

Electric motor with field weakening

A protective coating is applied to an inner or an outer member of a rotary fluid bearing by sputtering to minimize scuffing, wear and premature failure of the members during starts and stops of the bearing. The coating may include titanium, tungsten, chromium, amorphous carbon with or without metallic impurities, and hydrogenated amorphous carbon with or without metallic impurities. One of the members is formed in two sections to accommodate assembly of the bearing and these sections abut at end faces. Features on each end face are imparted to the other end face in a compression coining process to facilitate rapid and repeatable alignment of the two sections when separated and rejoined during subsequent manufacturing steps.

Rotary fluid bearing coatings and coining and processes for manufacturing the same

An angular contact ball bearing has races formed from a case-carburized or carbonitrided steel, preferably a stainless steel, that withstands high forces and high temperatures. The bearing has relatively low osculation ratios to reduce the generation of heat, yet can withstand applied radial loads and the centrifugal forces generated in high speed operation.

High speed angular contact ball bearing

A rotary air bearing (A) as shown in the Figure has a journal ( ) provided with a pair of outwardly presented tapered surfaces located opposite the tapered surfaces on the journal, and a low friction liner ( ) bonded to the tapered surfaces on the hub and having tapered surfaces which are separated from the tapered surfaces of the journal by small air gaps (g).

Growing community of inventors

Keene, NH, United States of America

Richard A Knepper