Abstract: A clutch mechanism of the type constituted by a toothed wheel (3) driven by an endless screw (12), this wheel (3) being securable to a driven shaft (15) via two friction cones (5) disposed coaxially to the axial bore of the toothed wheel (3), and coacting, under the action of a control device (7, 13), with conical contact areas on the wheel (3). The toothed wheel (3) is made of a synthetic material, the bore of this toothed wheel (3) having an annular partition (16) delimiting on each side a shouldered recess for the reception of a metallic ring (4) secured in rotation to the wheel (3), this ring (4) comprising internally a conical contact area (4A) adapted to coact with the metallic friction cone (5).

Abstract: A clutch mechanism of the type constituted by a toothed wheel (3) driven by an endless screw (12), this wheel (3) being securable to a driven shaft (15) via two friction cones (5) disposed coaxially to the axial bore of the toothed wheel (3), and coacting, under the action of a control device (7, 13), with conical contact areas on the wheel (3). The toothed wheel (3) is made of a synthetic material, the bore of this toothed wheel (3) having an annular partition (16) delimiting on each side a shouldered recess for the reception of a metallic ring (4) secured in rotation to the wheel (3), this ring (4) comprising internally a conical contact area (4A) adapted to coact with the metallic friction cone (5).

Abstract: A clutch mechanism of the type constituted by a toothed wheel (3) driven by an endless screw (12), this wheel (3) being securable to a driven shaft (15) via two friction cones (5) disposed coaxially to the axial bore of the toothed wheel (3), and coacting, under the action of a control device (7, 13), with conical contact areas on the wheel (3). The toothed wheel (3) is made of a synthetic material, the bore of this toothed wheel (3) having an annular partition (16) delimiting on each side a shouldered recess for the reception of a metallic ring (4) secured in rotation to said wheel (3), this ring (4) comprising internally a conical contact area (4A) adapted to coact with the metallic friction cone (5).

Abstract: A transmission between a drive member and a drive shaft (1) of an automotive engine comprising, in a housing (2), a friction clutch constituted by at least one rotatable driving element (3) and at least one driven element coming into bearing contact with variable gripping to obtain a variation of the couple transmitted to the output shaft (1) under the action of a control device that at least partially projects from the housing (2). The control device is automatically actuated by two separate inertial forces, one, generated by the driver of the engine, tending to bring together the drive element (3) and the driven element when the resistance to forward movement of the engine increases, the other, generated by the mass of the engine tending to uncouple the drive element (3) and driven element when the resistance to advance of the engine decreases.

Abstract: A casing (1) for a transmission mechanism constituted by two half shells (1A, 1B), contains at least one clutch control member (3) moved angularly by a control lever (4) external to the casing (1) The control lever (4) includes a split sleeve (5) insertable within a receiving bearing (6) of the casing (1), this sleeve (5) defining at least two fingers (7A, 7B) that are resiliently deformable so as to be able to be immobilized axially in the receiving bearing (6), a portion (3A) of the body of the control member (3) being disposed in the assembled condition of the half shells (1A, 1B) of the casing (1) in the slots (8) provided between the fingers (7A, 7B) to render the lever (4) undisassembleable.

Abstract: The invention relates to a speed transmission for a mower, in particular a lawnmower, comprising a speed changer. This transmission is characterized in that the speed changer is constituted by a transmission with a belt (5) between a drive pulley (6) mounted on the motor shaft (1) that bears the blades and a driven pulley (7) mounted on the input shaft (2) of the reducer (4), the drive pulley (6) and the driven pulley (7) each having flanges (6A, 6B) (7A, 7B) that are movable, the movement of the flanges (6A, 6B) of the drive pulley (6), ensuring continuous tensioning of the belt, being controlled automatically as a function of the couple transmitted between said pulleys by means of a member (8) for the continuous adjustment of the tension of the belt (5) while the movement of the flanges (7A, 7B) of the driven pulley (7), ensuring the speed change, is controlled manually by means of a control member (12).

Abstract: A transmission device between a primary motor shaft (1) and an output shaft, includes a casing (3) constituted by two half shells, a driving member (4), and a driven member (5) mounted on the output shaft (2). The driving member (4) is held in position by bearings (6A, 6B) provided in each half shell (3A, 3B), these bearings (6A, 6B) being disposed facing each other in the assembled condition of the half shells (3A, 3B).

Abstract: A transmission device for a self-propelled wheeled machine, this device, driven by a belt from a drive shaft, includes a housing mounted floating relative to the chassis of the machine containing a mechanism for reducing and clutching between an input shaft and at least one output shaft. This device is characterized in that the housing is constituted by half casings of which one includes a molded-on tongue loaded by a spring so as to exert on the housing a couple for swinging the housing about the output shaft, this tongue including, adjacent its end, an abutment immobilizing a sheath of a control cable acting on a clutch control lever of the device.

Abstract: The invention relates to a transmission between a drive member and a drive shaft (1) of an automotive engine of the type comprising, in a housing (2), a friction clutch constituted by at least one rotatable driving element (3) and at least one driven element coming into bearing contact with variable gripping to obtain a variation of the couple transmitted to the output shaft (1) under the action of a control device that at least partially projects from the housing (2).

Abstract: A transmission for a self-propelled engine includes an endless transmission (1) with a belt (2) between a driving pulley (3) and a driven pulley (4) carried by the input shaft (5) of a clutch engaging mechanism (7) whose output shaft (6) is coupled to the wheels (20) of the machine. The clutch engaging mechanism (7) is a toothed clutch engagement disposed within a housing (19) mounted oscillably about the output shaft (6) of the clutch engaging mechanism (7) in the direction of tensioning or respectively relaxing the belt (2) of the endless transmission, at least under the action of a control mechanism (13), whose operation is subject to the control member (10) of the clutch engaging mechanism so as to give rise to the passage to the clutch engaged condition of the clutch engaging mechanism (7) and then the tensioning of the belt (2).

Abstract: The invention relates to a transmission device between a primary motor shaft and an output shaft (1) of the type comprising a casing (2) within which are disposed a reducing mechanism constituted by a driving member (3) in engagement with a driven member (4), the driven member (4), mounted freely rotatably on the output shaft (2) being adapted to be coupled with or uncoupled from said shaft (2) by means of a clutch mechanism mounted on said output shaft (2)

Abstract: A transmission device between a primary motor shaft (1) and an output shaft, includes a casing (3) constituted by two half shells, a driving member (4), and a driven member (5) mounted on the output shaft (2). The driving member (4) is held in position by bearings (6A, 6B) provided in each half shell (3A, 3B), these bearings (6A, 6B) being disposed facing each other in the assembled condition of the half shells (3A, 3B).

Abstract: The invention relates to a casing (1) for a transmission mechanism of any nature constituted by two half shells (1A, 1B), this casing (1) containing at least one clutch control member (3) moved angularly by means of a control lever (4) external to the casing (1).

Abstract: A relay pulley (1) for endless power transmission between a drive pulley (2) and a driven pulley (3). The relay pulley (1) comprises a rotatable hub (6) carrying, between two external fixed plates (7A, 7B), at least one member (8) movable axially on the hub (6) to delimit with the fixed plates (7A, 7B) two parallel grooves (9A, 9B) of variable dimension adapted to receive respectively a belt (4, 5) of a first (T1) or second (T2) endless belt transmission. The movable member (8) comprises at least two hollow plates (8A, 8B) mounted on the hub (6), which include facing bearing surfaces (10A, 10B) in sliding contact. The bearing surfaces (10A, 10B) are arranged to permit the approach or respectively the movement apart of the movable plates (8A, 8B).