A pipe press-fit connecting apparatus includes a connecting device. The connecting device may be used to connect a connected unit to a pressing power providing unit. The connecting device includes a fastener and a coupling pin. The fastener is installed at one end of the installation hole on an exterior surface of a cylinder block and has a fastening pin configured to be resiliently arranged and at least partially be exposed to the installation hole. The coupling pin is inserted through the installation hole and the insertion hole through another end of the installation hole on the exterior surface of the cylinder block to be resiliently coupled to the fastening pin to couple the connected unit to the pressing power providing unit.

A device with an adjustment bolt includes a bolt attachment wall, an adjustment bolt screwed with an internal thread hole of the bolt attachment wall, a locknut screwed with the adjustment bolt, a cover that surrounds the adjustment bolt and the locknut, and a stopper unit that prevents removal of the cover from the locknut. The stopper unit includes an inner circumference groove of the cover fitted around a C-shaped retaining ring, and an external circumference groove of the locknut fitting within the retaining ring. The external circumference groove includes a first groove portion having a large-diameter groove bottom that restricts contraction and removal of the retaining ring fitted within the inner circumference groove, and a second groove portion provided continuously for the first groove portion and having a small-diameter groove bottom that allows contraction and removal of the retaining ring fitted within the inner circumference groove.

A lock nut is useable for setting a bearing to preload or endplay. A plurality of preload markings are circumferentially spaced apart on the nut. The distance between the preload marking corresponding to a preselected amount of preload applied or reduced on said bearing when the nut is (i) tightened to apply a preload force to said bearing or (ii) loosened to reduce a preload force on said bearing, respectively. A plurality of endplay markings are also circumferentially spaced apart on the nut. The distance between the endplay markings, corresponding to a preselected amount of endplay increased or reduced in said bearing when the nut is (i) tightened to reduce endplay on the bearing or (ii) loosened to increase endplay in said bearing. The use of endplay and preload markings enables setting of a bearing on an axle or spindle to either an endplay setting or a preload setting by adjusting the rotation of the lock nut according to the endplay markings or the preload markings, respectively.

An engine roller lifter for use in a valve train of an internal combustion engine includes a body, an anti-rotation device and a clip. The body can have an outer peripheral surface configured for sliding movement in a bore provided in the engine. The body can define a receiving channel formed in the outer peripheral surface. The body can further define a slot formed at the receiving channel. The anti-rotation device can include a guide plug received in the receiving channel of the body. The guide plug can extend outwardly from the outer peripheral surface of the body. The guide plug can be configured to locate into a bore slot defined in a cylinder head of the internal combustion engine. The clip can be received by the slot and captured the guide plug in the receiving channel.

A valve, in particular for hydraulic circuits, includes a valve body (4) designed as a cartridge that can be fixed in a housing (6) having fluid connections (8) by a securing device (20, 26, 28). The securing device has at least one blocking element (20) in the form of a separate component between the valve body (4) and the housing (6). The blocking element has blocking surfaces that can be moved relative to the longitudinal axis (18) of the valve body (4) between an assembly position allowing the valve body (4) to be inserted into the housing (6) and a blocking position in which the blocking surfaces secure the valve body in an assembly position, preferably with zero backlash by bearing against retaining surfaces (26, 28) of the housing (6) and the valve body (4).

An assembly unit has an assembly part with an assembly side and an opposite outer side. A through opening extends from the outer side to the assembly side. A screw has a head that juts radially over the through opening on the outer side and a shank which reaches through the through opening with radial clearance. The screw has a threaded portion and a non-threaded portion disposed between the threaded portion and the head. A holder fixes the screw captively in the through opening. The holder is held axially movably in the through opening and axially movably on the non-threaded shank portion of the screw. The holder has a disk-shaped flange with a flange opening reached through by the non-threaded shank of the screw.

A method for producing a clamping ring in which pins that protrude in the region of or near a ring contour are formed on the top and bottom surfaces of a flat sheet metal material and after the ring contour is cut out, burrs that are produced during the cutting are removed by a deburring process. Advantages for the machining of the clamping ring are achieved if before a finish cutting by a complete cutting-out of the ring contour that is carried out from the one side of the flat sheet metal material, the ring contour is partially cut out from the other side in the vicinity of or near the pin protruding from this other side.

The invention discloses several types of fastener, fastening systems, fastener assemblies and related areas.

In particular, the invention relates to a releasable fastening system (50) which has a pin (152) with a locking cavity (163). The pin is intended for insertion in an aperture (154). A locking means (158, 160) engages the locking cavity (163) of the pin (152) when the pin (152) is received in the aperture (154). The system (150) also includes unlocking means (162) which includes material adapted to contract when activated. When a material contracts, engagement means (158) included in the locking means (158, 160), disengage the locking cavity (154).

A lock nut is useable for setting a bearing to preload or endplay. A plurality of preload markings are circumferentially spaced apart on the nut. The distance between the preload marking corresponding to a preselected amount of preload applied or reduced on said bearing when the nut is (i) tightened to apply a preload force to said bearing or (ii) loosened to reduce a preload force on said bearing, respectively. A plurality of endplay markings are also circumferentially spaced apart on the nut. The distance between the endplay markings, corresponding to a preselected amount of endplay increased or reduced in said bearing when the nut is (i) tightened to reduce endplay on the bearing or (ii) loosened to increase endplay in said bearing. The use of endplay and preload markings enables setting of a bearing on an axle or spindle to either an endplay setting or a preload setting by adjusting the rotation of the lock nut according to the endplay markings or the preload markings, respectively.

A system includes a washer, a nut, a retainer structure, and a gasket. The washer has a bore extending between a distal end and a proximal end. A first section of the bore extends from the distal end to a shoulder portion. A second section of the bore extends from the shoulder portion to the proximal end. The shoulder portion defines an aperture. The nut is configured to be received in the first section of the bore. The nut includes a threaded bore configured to threadably engage a threaded shaft of a bolt. The retainer structure is configured to axially retain the nut in the first section of the bore of the washer. The gasket has a through-bore axially aligned with the bore of the washer and the threaded bore of the nut. The gasket is configured to be axially retained in the second section of bore of the washer.