Abstract:
A dental cutting device has a head portion (10) which accommodates a rotary cylinder (20) for holding a cutting tool (22), and a turbine blade (21) mounted around and secured on the rotary cylinder (20). Air fed from an air-supply port (24) is blown onto the turbine blade to rotate the same, and the air blown onto the turbine blade is exhausted from the exhaust port (25). The head portion has a first chamber (26) which is located at a portion confronting the outer peripheral end portion of the turbine blade and which extends in a direction orthogonal to the central axis of the rotary cylinder, and second chambers (27, 28) which are located adjacent to one or both ends of the turbine blade along the direction of the central axial and which communicate with the first chamber.
Abstract:
A unidirectional bearing device includes an inner ring, an outer ring concentric with, and spaced from the inner ring, and an annular frame configured to be provided between the inner ring and the outer ring. The frame has a first side including a plurality of sockets for holding a plurality of roller elements, and a second side opposite the first side including a plurality of cavities, each housing a corresponding brake element. The second side also includes a plurality of slots each extending into a corresponding one of the cavities and holding spring elements for maintaining the brake elements in a predetermined position within the cavities. The brake elements and the spring elements cooperatively enable relative rotation between the inner ring and the outer ring in one direction.
Abstract:
A one-way clutch unit has a one-way clutch having rollers serving as engaging members and a retainer for retaining the rollers and a ball bearing axially adjacent to the one-way clutch and having balls and a retainer for retaining the balls. And in order to reduce the number of component parts and the axial length of the unit, the one-way clutch unit has a one-piece outer ring having a first outer ring part for the one-way clutch and a second outer ring part for the ball bearing, which parts are integral with each other. The one-way clutch unit also has a one-piece inner ring having a first inner ring part for the one-way clutch and a second inner ring part for the ball bearing, which parts are integral with each other.
Abstract:
A suspension strut for a motor vehicle in which a steering knuckle is supported by a housing of a telescopic damper. A piston rod projecting from the damper housing has a support flange secured to its free end to form part of a flexible mounting for a body portion of the vehicle. A helical suspension spring is seated at its lower end on an annular bracket carried by the damper housing and at its upper end on a spring support plate surrounding the piston rod. A needle-roller thrust bearing is interposed between the piston rod support flange and the spring support plate to accommodate rotary movement of the spring and support plate during steering maneuvers.To provide a predetermined amount of bearing friction, a friction element in the form of a circular bead is arranged between the piston rod support flange and the spring support plate. The circular bead is formed as a part of a cage of plastic material serving to locate the individual needle rollers of the bearing.
Abstract:
The invention relates to a bearing assembly (10) comprising at least one first bearing element (12) and a second bearing element (14) which are rotatably connected relative to each other along a common longitudinal axis (14). The bearing assembly (10) comprises a brake device (18) which inhibits the rotation of the two bearing elements (12) relative to each other by means of a frictional force produced by the brake device (18), wherein the brake device (18) has at least one frictional element (20) and at least one clamping device (22), by means of which the frictional element (20) is permanently clamped against one of the two bearing elements (12). The bearing assembly also comprises a coupling device (30) which can be moved between an open state and a closed state. In the closed state, the brake device (18) is engaged, whereby when the two bearing elements (12) rotate relative to each other, the rotation is inhibited by the frictional force produced by the brake device (18), and in the open state, the brake device (18) is disengaged.
Abstract:
A rolling element bearing having inner and outer bearing rings with rolling elements therebetween, and an angle-of-rotation limiting device that limits the relative rotation between the inner and outer bearing rings within an angle-of-rotation range from 0° to greater than 360° and includes a first stop element arranged on the inner bearing ring and a second stop element arranged on the outer bearing ring. The first stop element is formed by a plurality of individual radial base bores arranged in peripheral succession in a row on the outer lateral surface of the inner bearing ring and by a slotted-hole-type radial base groove arranged between first and last radial base bores, and one or two separate angle limiters protruding radially beyond the radial base bores or groove can be inserted into the radial base bores or the radial base groove depending on the size of the angle of rotation to be limited.
Abstract:
A rotary joint which, in order to limit the mutual rotation of the outer bearing ring (2) with respect to the inner bearing ring (2), is provided with a raceway (11), which is limited by one or two stops (14) and in which a projection connected to the outer bearing ring engages. In order to ensure that a rotation greater than 360° is possible, the raceway is of helical design.
Abstract:
A linking device has a bearing and is suitable for use with a weapons system. The device provides adjustable rotational resisting torque of two coaxial cylindrical parts which are rotatable relative to one another about a shared axis. The bearing includes two rings made of a resiliently deformable material and is capable of respectively engaging with the two cylindrical portions, and between which rolling elements are arranged such as to be in contact with raceways of said rings. The device further includes a controllable member for adjusting the tightening of the rings, wherein the controllable member is capable of engaging one of said parts in order to engage with said bearing.
Abstract:
A zero or limited resistance isolation bearing comprising a tubular outermost sleeve, an elastic or resilient member located adjacent to and inside the outermost sleeve, and an innermost sleeve assembly consisting of a tubular inner member and a tubular outer member that are threadably interconnected. The threadable interconnections are properly sealed at the ends, and a lubricant is supplied in and around the threadable interconnections to allow zero or limited resistance to torsional rotation of the inner member of the innermost sleeve assembly relative to the outer member of the innermost threaded sleeve assembly. Such bearings are useful as automotive suspension components, such as, for example, for use in connective members of control arms at the automobile frame.
Abstract:
A system includes a plain bearing assembly configured to enable rotation of a shaft about a bearing system axis of the shaft. The plain bearing assembly includes the shaft, a cylindrical intermediate bearing disposed about the shaft, and an external bearing disposed about the intermediate bearing. The plain bearing assembly is configured to facilitate oscillatory motion of the shaft relative to the external bearing such that, when the shaft rotates in a first direction about the bearing system axis, the intermediate bearing rotates about the bearing system axis in the first direction, and when the shaft rotates in a second direction opposite the first direction about the bearing system axis, rotation of the intermediate bearing about the bearing system axis is resisted or prevented.