Abstract: A valve actuated device for a valve having a valve body and a valve translating member; a housing; a rotary and non-translating sleeve mounted in the housing and connected to an input rotary means; an axial shaft means positioned coaxially to the sleeve and adapted to be connected to the valve translating member; screw connecting means provided between the axial shaft means and the sleeve for convert applied rotation of the sleeve into axial translation of the axial shaft means; anti-rotation and axial guidance means installed between the housing and the shaft means; the anti-rotation and axial guidance means providing a linear ball bearing including a sleeve mounted to the housing and at least one rolling element recirculation system, the rolling elements thereof engaging axial groove of the shaft means.

Abstract: The valve operator assembly is provided includes a housing, an input member rotatably mounted, and a transmission mechanism including a translating element and a rotating element connected to the input member, said transmission mechanism being adapted to convert applied rotation of the input member into axial translation of said translating element. The assembly further includes a locking mechanism provided with a casing mounted on the transmission mechanism and/or the housing, with a freewheel including a plurality of locking members mounted in radial contact with the transmission mechanism and with the casing, and with friction means axially disposed between the casing and the housing and mounted in axial contact with said housing. The friction means, the freewheel and the casing cooperate together to lock the transmission mechanism with the housing in a static position of said assembly.

Abstract: A valve operator assembly is adapted for use with a valve. The assembly comprises a housing, an input member rotatably mounted with respect to the housing and comprising a rotational drive input, and a transmission mechanism connected to the input member and comprising a stem, the transmission mechanism being adapted to convert applied rotation of the rotational drive input into axial translation of the stem. The assembly further comprises at least one elastic actuator axially located between the input member and the stem to obtain a compression of the actuator during an axial translation of the stem towards the input member and a release of the actuator during an axial translation in the opposite direction.

Abstract: The invention concerns a valve operator assembly for valve. The valve provides a valve body and a valve translating member axially moveable. The valve operator assembly provides a housing adapted to be mounted on the valve, an input member rotatably mounted with respect to the housing, and a transmission mechanism. The transmission mechanism provides a translating element connected to the valve translating member and a rotating element connected to the input member, the transmission mechanism being adapted to convert applied rotation of the input member into axial translation of the translating element. The valve operator assembly further provides a spacing element adapted to be connected on the valve body on one end and on the housing on the other end, the spacing element having an almost tubular shape defining an axial bore through which at least partly passes the valve translating member and the translating element of the transmission mechanism.

Abstract: An actuating device having a longitudinal shaft, an internal sleeve, an external sleeve, internal screw connecting means provided between the longitudinal shaft and the intermediate sleeve, external screw connecting means provided between the intermediate sleeve and the external sleeve. The direct efficiency of the internal screw connecting means is higher than the direct efficiency of the external screw connecting means. The self-releasable coupling means are provided between the longitudinal shaft and the internal sleeve.

Abstract: The valve operator assembly is provided comprises a housing 18, an input member 20 rotatably mounted, and a transmission mechanism 22 comprising a translating element 24 and a rotating element 28 connected to the input member, said transmission mechanism being adapted to convert applied rotation of the input member into axial translation of said translating element. The assembly further comprises a locking mechanism 23 provided with a casing 80 mounted on the transmission mechanism and/or the housing, with a freewheel 82 comprising a plurality of locking members mounted in radial contact with the transmission mechanism and with the casing, and with friction means 84 axially disposed between the casing and the housing and mounted in axial contact with said housing. The friction means 84, the freewheel 82 and the casing 80 cooperate together to lock the transmission mechanism with the housing in a static position of said assembly.

Abstract: The valve operator assembly is provided for a valve and includes a housing, an input member rotatably mounted, and a transmission mechanism including a translating element and a rotating element connected to the input member, said transmission mechanism being adapted to convert applied rotation of the input member into axial translation of said translating element. The assembly further includes at least one locking mechanism radially interposed between the transmission mechanism and the housing, and provided with friction means in radial contact with the housing, and with at least one pre-stressing element acting on said friction means to maintain said radial contact. The pre-stressing element and the friction means cooperate together to lock the transmission mechanism with the housing in a static position of said assembly.

Abstract: A valve operator assembly is provided for a valve. The assembly includes a housing adapted to be mounted on a bonnet of the valve, an input member rotatably mounted with respect to the housing and an inverted roller screw mechanism and comprising a screw adapted to be connected to a valve stem of the valve, a nut surrounding and coaxial with the screw, the nut being connected to the input member, and a plurality of rollers radially disposed between the screw and the nut.

Abstract: A screw mechanism comprising a screw provided with an outer thread, a nut surrounding and coaxial with the screw, the nut being provided with an inner thread, and a plurality of rolling elements radially disposed between the screw and the nut and engaged in both of the outer and inner threads. A contact diameter Dcontact between the rolling elements and the nut is defined by: D contact ? L ? × tan ? ( ? ) wherein L corresponds to the lead of the screw mechanism and ? corresponds to a determined non-back-driving factor which is chosen from 0°<??1°. The contact diameter is provided in order to prevent back-driving of the mechanism.

Abstract: The valve operator assembly is provided for a valve and comprises a housing 18, an input member 20 rotatably mounted with respect to said housing and comprising a rotational drive input 72, and a transmission mechanism 22 connected to said input member and comprising a stem 24, said transmission mechanism being adapted to convert applied rotation of the rotational drive input into axial translation of said stem. The assembly further comprises at least one elastic actuator 33 axially located between the input member 20 and the stem 24 to obtain a compression of the actuator during an axial translation of said stem towards the input member and a release of said actuator during an axial translation in the opposite direction.

Abstract: The suspension thrust bearing device for a motor vehicle comprises a rolling bearing forming an axial thrust bearing and provided with an upper ring, with a lower ring and with at least one row of rolling elements arranged between the rings, a bearing cap in contact with the upper ring, and a support cap in contact with the lower ring and forming a bearing means for a suspension spring. The support cap comprises a body of rigid material and seals of flexible material fixed to the body and comprising dynamic sealing lips in contact with the bearing cap or one of the rings of the rolling bearing and delimiting radially a sealed space containing at least the rolling elements of the rolling bearing. The support cap further comprises an annular ring to which the lower ends of the seals are connected and forming a bearing surface for the suspension spring.

Abstract: A bearing lubricating housing (100) comprising a lubricating housing body (110). The bearing housing (100) is designed to retain a rolling element bearing assembly (200) while providing axial motion when the housing (100) is assembled within an interior of a guiding tube (310). The bearing housing (100) includes a series of channels (118) and/or passageways (114, 116) forming a lubrication matrix for collecting a lubricant from an interior surface (312) of the guiding tube (310) to the rolling element bearing assembly (200).

Abstract: A bearing lubricating housing (100) comprising a lubricating housing body (110). The bearing housing (100) is designed to retain a rolling element bearing assembly (200) while providing axial motion when the housing (100) is assembled within an interior of a guiding tube (310). The bearing housing (100) includes a series of channels (118) and/or passageways (114, 116) forming a lubrication matrix for collecting a lubricant from an interior surface (312) of the guiding tube (310) to the rolling element bearing assembly (200).

Abstract: An anti-rotation device prevents relative rotation between first and second members, one member being telescopingly disposed about the other and at least one member being linearly displaceable along a central axis. First and second guide surfaces are provided on the first member and extend generally parallel with each other and the central axis. First and second rollers are connected with the second member and are each rotatable about an adjustably fixed axis on the second member. The first roller is rollable along the first guide surface to prevent angular displacement between the two members when the displaceable member moves in a first direction and the second roller is rollable along the second guide surface to prevent angular displacement between the two members when the displaceable member moves in an opposing direction. The contact between the rollers and guide surfaces provide a radial degree of freedom to the anti-rotation device.

Abstract: Ball screw assembly comprising a screw (2) provided with an outer thread (3); a nut (4) provided with an inner thread (5); a series (6) of balls (7) able to circulate along a circulating path (10) between the screw and the nut, along which the balls are engaged in the threads thereof; and recirculating means (8) defining a recirculating channel (9) to carry balls from one end to the other end of said circulating path (10); The recirculating channel (9) comprising a return channel (14) provided on the nut and, between the ends of this return channel and the corresponding ends of said circulating path, deflecting channels (27, 28) which are defined respectively between surfaces (25) of deflecting elements (20, 21) engaged in respective holes (11, 12) of the nut (4) and local zones (26) of surfaces (16) of these respective holes.

Abstract: The suspension bump thrust device for a motor vehicle comprises a lower supporting cover 20, an upper elastic bearing seat 18 designed to be attached to the chassis of the motor vehicle, and a rolling bearing 22 forming an axial thrust placed axially between the supporting cover and the bearing seat. The bearing comprises a lower ring, an upper ring and at least one row of rolling elements placed between the said rings. The bearing seat comprises an axial retention means 34d for the supporting cover arranged on a skirt 34c of the said seat and interacting with a complementary axial retention means 50e for the said cover. A cup 36 for reinforcing the bearing seat forms the upper ring of the rolling bearing. The reinforcing cup 36 comprises an axial portion 36a resting against the skirt of the bearing seat and a radial portion 36b radially extending the axial portion inwards.

Abstract: Ball screw assembly comprising a screw (2) provided with an outer thread (3); a nut (4) provided with an inner thread (5); a series (6) of balls (7) able to circulate along a circulating path (10) between the screw and the nut, along which the balls are engaged in the threads thereof; and recirculating means (8) defining a recirculating channel (9) to carry balls from one end to the other end of said circulating path (10); The recirculating channel (9) comprising a return channel (14) provided on the nut and, between the ends of this return channel and the corresponding ends of said circulating path, deflecting channels (27, 28) which are defined respectively between surfaces (25) of deflecting elements (20, 21) engaged in respective holes (11, 12) of the nut (4) and local zones (26) of surfaces (16) of these respective holes.

Abstract: The suspension thrust bearing device for a motor vehicle comprises a rolling bearing 22 forming an axial thrust bearing and provided with an upper ring, with a lower ring and with at least one row of rolling elements arranged between the rings, a bearing cap 18 in contact with the upper ring, and a support cap 20 in contact with the lower ring and forming a bearing means for a suspension spring. The support cap 20 comprises a body 32 of rigid material and seals 46, 48 of flexible material fixed to the body and comprising dynamic sealing lips 56, 62 in frictional contact with the bearing cap or one of the rings of the rolling bearing and delimiting radially a sealed space 64 containing at least the rolling elements of the rolling bearing. The support cap 20 further comprises an annular ring 50 to which the lower ends of the seals are connected and forming a bearing surface 50a for the suspension spring.

Abstract: The suspension bump thrust device for a motor vehicle comprises a lower supporting cover 20, an upper elastic bearing seat 18 designed to be attached to the chassis of the motor vehicle, and a rolling bearing 22 forming an axial thrust placed axially between the supporting cover and the bearing seat. The bearing comprises a lower ring, an upper ring and at least one row of rolling elements placed between the said rings. The bearing seat comprises an axial retention means 34d for the supporting cover arranged on a skirt 34c of the said seat and interacting with a complementary axial retention means 50e for the said cover. A cup 36 for reinforcing the bearing seat forms the upper ring of the rolling bearing. The reinforcing cup 36 comprises an axial portion 36a resting against the skirt of the bearing seat and a radial portion 36b radially extending the axial portion inwards.

Abstract: A cage (10) for holding rolling elements (9) of a roller bearing (6) comprises a frame part (15) holding the rolling elements (9) on a bearing circumference (17), and at least one circumferential sealing lip (16c, 16d) extending from the frame (15), made of a more pliable material than the material of the frame. The frame (15) has parts comprising concave surfaces (38). The material of the circumferential lip at least partly fills the concavities (25) defined by these concave surfaces.