Abstract: The invention relates to a chain wheel (2, 3), especially for a timing chain drive, with a rotary shaft, a sprocket wheel (7) positioned around the rotary shaft featuring multiple alternating teeth (17) and tooth gaps (16) distributed around its circumference, as well as at least one chain guide (8), the sprocket wheel (7) and the chain guide (8) are rigidly joined, the chain guide (8) incorporates a contoured surrounding support cage (9) causing it to bear on contact faces of link plates (13, 14) and the support cage (9) or raised regions of the support cage (9) extend along a curved circumference that constitutes the perimeter of the chain guide (8), said perimeter of the chain guide (8) having a non-circular profile.

Abstract: The invention relates to a tensioner assembly for a traction medium drive, specifically a chain drive, with at least two traction medium wheels and a flexible traction medium, comprising a tensioning rail which can be pressed against the traction medium by means of a tensioning device, wherein the tensioning rail is applied against at least one sliding guide and can be displaced along the at least one sliding guide by means of the tensioning device.

Abstract: The present invention relates to a hydraulic auto-tensioner, in particular for a chain drive of an internal combustion engine, comprising a housing, a tensioning plunger guided in a plunger bore of said housing, a free piston guided in said plunger bore, and a plunger rod formed on said tensioning plunger and extending through the free piston. The tensioning plunger, the housing and the free piston delimit a hydraulic reservoir which is sealed with respect to the housing and the plunger rod by means of a sealing unit that is arranged on the free piston. The sealing unit is implemented as a double seal ring with an outer sealing surface which is in sliding contact with the plunger bore of the housing, and an inner sealing surface which is in sliding contact with the plunger rod of the tensioning plunger. In addition, the present invention relates to the use of such a double seal ring in a hydraulic auto-tensioner.

Abstract: The present invention relates to a tensioning rail for a chain drive, in particular a timing chain drive of an internal combustion engine, comprising a base body (11) and a pressure body (1) connected to the base body which provides a pressing area (2) for pressing a chain tensioner, wherein a pressing surface (4) of the pressure body (1) which faces the chain tensioner during use is formed with a channel device (5). The invention also relates to a tensioning device for an endless drive element, in particular a timing chain of an internal combustion engine, comprising a tensioning rail which can be pushed on the endless drive element having a base body (11) and a pressure body (1) which can be connected to the base body (11) and which provides a pressing area, and having a chain tensioner which presses on the pressing area (2) of the pressure body (1).

Abstract: The present invention relates to a tensioning device for an endless drive element, in particular a timing chain of an internal combustion engine, comprising a tensioning rail which is adapted to be operatively connected to the endless drive element, and a tensioning piston which is supported in a housing in an axially displaceable manner and which presses against the tensioning rail, wherein an end face of said tensioning piston is adapted to be connected to a cap element extending beyond the tensioning piston and forming a pressure face which is in engagement with the tensioning rail.

Abstract: The present invention relates to a tensioner, in particular a tensioner for a driving chain of an internal combustion engine, comprising a tensioning plunger which is axially movably guided in a plunger bore of a plunger reception means and an adjuster for readjusting the shift of the operating range of the tensioning plunger caused by wear. The adjuster comprises a hydraulic adjusting element and a closable pressure chamber provided on the bottom of the plunger bore. The adjusting element delimits the pressure chamber against the plunger bore and is axially movably guided in said plunger bore.

Abstract: The present invention relates to a tooth plate for an inverted tooth chain with two hinge openings spaced apart in the longitudinal direction and a tooth plate contour with two teeth arranged on one side in the longitudinal direction, the teeth each being limited by an outer flank and an inner flank. Here, at least one section of the tooth plate contour is shaved, where the ends of the shaved section comprise an overcut. This overcut is arranged in a low-stress area of the tooth plate contour. The invention further relates to a corresponding method for the manufacture of such a tooth plate with the pre-punching and shaving of a section of the tooth plate contour, wherein the overcut at least one end is arranged in a low-stress area of the tooth plate contour. In the subsequent normal punching of the non-shaved areas, the normally punched area of the tooth plate contour and the at least one shaved section meet in the area of the overcut at an angle to each other.

Abstract: A double-meshing type tooth chain, where each of the chain hinges is formed by a sleeve and by a pin extending through said sleeve, and the link plates of the inner chain links are arranged on the sleeves and the link plates of the outer chain links are arranged on the pins, and wherein the outer-chain-link link plate arranged on the pin and the inner-chain-link link plate, which is arranged on the sleeve and located adjacent to said link plate of the outer chain link, are oriented such that their teeth project in the same direction.