1479 results about "Tappet" patented technology

An injection device for holding and activating a two-chamber ampulla has components whose relative movement causes the pistons of the two-chamber ampulla to be moved in order to mix the substances, as well as devices for injecting the product which is mixed in this way. For this purpose, a receptacle (103) into which the two-chamber ampulla (111) can be inserted and secured is held in a housing (101), and the receptacle (103) can be displaced by means of a carriage (108). A tappet (104) which acts on the pistons (111A, 111B) is movably held in the receptacle (103). A traction cable (114) which is deflected by means of a roller (109) which is mounted on the carriage (108) and one of whose ends is connected to the receptacle (103) and the other end of which is connected to a tension spring (110) which is held on the housing (101) is provided in order to carry out a mixing stroke, insertion stroke, injection stroke and a return stroke. Devices which can be activated automatically and/or manually between the housing (101), receptacle (103), tappet (104) and carriage (108) control their alternating coupling to the traction cable (114) and thus the sequence of the mixing stroke, insertion stroke, injection stroke and return stroke. The invention thus provides a partially automatic injection device for two-chamber ampullas whose handling comfort and safety for the patient are substantially improved.

A mechanical tappet (101, 201, 301, 401, 501, 601, 701, 801, 901, 1001) is provided, in particular for actuating the lifting of a pump piston (39) of a fuel pump of an internal combustion engine, with a sleeve-shaped tappet housing (102, 202, 302, 402, 502, 602, 702, 902, 1002) constructed as a shaped sheet-metal part and with a driving roller (6) supported so that it can rotate. Here, a bolt (4) supports the driving roller so that it is centered, and end sections (7) of the bolt projecting from the driving roller are supported in bolt eyes (8) of the tappet housing.

PCT No. PCT/EP97/06344 Sec. 371 Date May 20, 1999 Sec. 102(e) Date May 20, 1999 PCT Filed Nov. 13, 1997 PCT Pub. No. WO98/23868 PCT Pub. Date Jun. 4, 1998A microvalve has a base element provided with a passage opening, a tappet, a suspension device for guiding the tappet, and a piezoelectric actuator for actuating the tappet. The suspension device guides the tappet relative to the base element in such a way that the passage opening can be closed or opened by the tappet. The longitudinal dimensions of the piezoelectric actuator can be changed by the application of an electric voltage. Longitudinally spaced ends of the piezoelectric actuator are connected to longitudinally spaced ends of the suspension device in such a way that the suspension device provides a way for mechanical translation between the actuator and the tappet. A change in the longitudinal dimensions of the piezoelectric actuator caused by the application of an electric voltage to the piezoelectric actuator is mechanically translated by the suspension device into a movement of the tappet essentially at right angles to the longitudinal direction so that the passage opening will be opened or closed. In addition, the suspension device is secured to the base element with the aid of a hinge-like element. At least two spaced points are used to secure the suspension device to the base element.

A gas tappet system for use in an M16, M4, or AR-15 type rifle having a detachable piston eccentrically connected to an operating rod. A piston having a plenum therein and a releasably attached operating rod uses combustion or propellant gasses to move the piston in a long stroke, preventing damaging impulses to the bolt carrier and cycling rounds for automatic or semi-automatic fire. The operating rod, piston, cylinder, and mounting clamp permit easy installation on the rifle without any modification and can easily be removed for reinstallation of the original direct gas impingement system.

A retaining device includes bearing units (1111, 1112, 1121 1122) that float-mount a flat screen (2000) and that are preferably each provided with at least one elastic-positioning element (11210) and a vibration damping element (11220). The elastic-positioning element preferably includes a cylinder-shaped hard rubber spacer element (11211). The vibration-damping element (11220) preferably includes a damper with an annular plate-shaped housing and a gel filling (11221). Vibrations and shocks are introduced substantially centrally into the vibration-damping element via a tappet (11224). The retaining device is advantageously used in an electronic display device to float-mount a flat screen, configured e.g. as an LCD display unit, in combination with a touch screen as a contact-sensitive unit.

A switchable cam follower (1) for a valve train of an internal combustion engine, which valve train can be actuated indirectly by tappet push rods, the cam follower comprises an outer and an inner section (4,5) end for switching-off the cam follower (1) from the cam lift, the inner section (5) is pivotable relative to the outer section (4) during a valve lift phase of the cam.

A hand-held fastener driver for fastening elements, having a driving tappet that is movably mounted in a tappet guide and that can be driven using at least one drive spring element is disclosed, having a tensioner for the drive spring element, and having a locking mechanism. In a locked position of the locking mechanism, the drive spring element can be locked in its tensioned position, whereby the tensioner has a tensioning element that is provided with a profile, and said tensioning element can be axially moved along a longitudinal axis of motion using a rotatable counter-element that is engaged with the profile and that can be driven by a motor.

For detecting closing or opening of a valve activated preferably by a solenoid actuator, a switch activated by a tappet spring mounted on an armature of the actuator is provided. A stop and an associated surface limit the stroke of the tappet with reference to the switch. Preferably, a valve closing element opens the gas flow only when the armature has already executed a part of its opening stroke. The trigger point of the switch is set in this first part of the opening stroke of the armature, in which the valve closing element has not yet opened. The stroke limiting of the tappet for activating the switch is also preferably set in this region of the opening stroke of the armature. However, the stop limits the stroke of the tappet independent of the opening stroke size of the armature, so that the same switch can be used for different valves with different nominal diameters and opening strokes.

A dehydrating device comprises a tappet unit, a transmission unit and a rotation unit, wherein the rotation unit comprises a bearing member and a transmission shaft. A aquiferous member is disposed in the bearing member, and then the operation of the tappet unit is beginning. The tappet unit then mechanically drives the transmission unit and the rotation unit so as to dewater the aquiferous member.

A method of controlling cylinder valve switching between a first valve condition and a second valve condition for transitioning between combustion modes of an engine comprises adjusting timing of a signal to switch between said valve conditions in response to information from a combustion sensor, wherein said combustion modes include spark ignition and homogeneous compression ignition.

PCT No. PCT/DE97/02698 Sec. 371 Date Sep. 13, 1999 Sec. 102(e) Date Sep. 13, 1999 PCT Filed Nov. 17, 1997 PCT Pub. No. WO98/40258 PCT Pub. Date Sep. 17, 1998A magnet valve having a rod-like base body for insertion into a stepped bore of a hydraulic block through which a valve tappet reaches a valve closing ball and on whose face end remote to an armature a cup-shaped sleeve is mounted. A valve seat of the magnet valve is embodied on the bottom of the cup-shaped sleeve. In order to make a large flow cross section available for a flow through the magnet valve in one flow direction, a check valve is integrated with the magnet valve and that to this end flow openings are disposed on an imaginary circle in the bottom of the cup-shaped sleeve. The openings are closed by an annular valve closing body of the check valve. The magnet valve of the invention is intended particularly for use as a brake pressure buildup valve for a wheel brake cylinder of a slip-controlled vehicle brake system.

An actuator, in particular for valves, relays, or the like, is disclosed, which has an electromagnet (10) with a magnet coil (11), a magnet armature (12) that can be slid between two end positions, and a magnet yoke (13), and has an actuation tappet (14) driven by the magnet armature (12). In order to produce a bistable actuator with a low power consumption and a low heating of current-carrying components-particularly when long switching times in both switch positions are required, on the one hand, the electromagnet (10) is embodied so that its magnet armature (12) has a stable middle position that is disposed between its two end positions, which are determined by the two switch positions of the actuator, and that can be approached from both end positions by supplying current to the magnet coil (11), and on the other hand, a bistable mechanical locking mechanism (15) is provided, which acts on the magnet armature (12) or on the actuation tappet (14) and comes into play in the end positions of the magnet armature (12) (FIG. 1).

The invention relates to a differential pad-selection measurement system and method, which are characterized in that: a differential left shell is arranged on a positioning bench, a lower simulation pad is arranged between the differential left shell and a lower semiaxis gear; planetary gears are sleeved on four ends of a cross axle of member to be measured and are arranged in a shaft hole of the differential left shell; a lower puller sleeve arranged in a shaft hole of the lower semiaxis gear is hung on the lower semiaxis gear through an upper edge shoulder of the lower puller sleeve, a measurement tappet is fixedly connected with the lower puller sleeve, a puller spring is arranged between the measurement tappet and the lower puller sleeve, a spring guide sleeve sleeves on the measurement tappet and is supported by the puller spring; an upper top board is arranged on the spring guide sleeve by press mounting manner; and a displacement sensor, a pressure sensor and a proximity switch are respectively arranged in a pressure driving body. The invention can automatically complete accurate measurement of thickness of the differential pad, and can increase product quality and production efficiency.

The invention relates to a constant variable valve lift device. The device comprises a threaded rod, a motor driving the threaded rod to do rotational movement, a tappet connected with the threaded rod by threads, a rocker shaft movably connected with the tappet, a cam arranged above the rocker shaft, a rocker roller which interacts with the cam and is hinged with the rocker shaft, a valve driven by the rocker shaft and a telescopic arm connected with the rocker roller, wherein the rocker shaft is provided with a slideway which is movably connected with the top of the tappet, and the tappet moves in the slideway. The constant variable valve lift device solves the problem of inconstant variation of the valve lift by making a lever ratio change with the position of a fulcrum of the rocker shaft according to the lever principle.

In one aspect, the present disclosure is directed to a tappet assembly for a machine. The assembly may include a tappet body, a pin fixedly mounted in the tappet body, and a substantially cylindrical roller mounted about the pin. The roller may have a substantially cylindrical outer surface with a circumferential dimension and a width dimension, the width dimension being defined by two lateral edges. The roller may be configured to provide rolling contact between the outer surface of the roller and a cam lobe. The outer surface of the roller may be crowned such that at maximum operational loading conditions of the machine a footprint of contact pressure from the cam lobe is spread substantially the full width of outer cylindrical surface of the roller.

A valve including an integrated heater that has particular application for one or more of a bleed valve, a drain valve and a pressure release valve in an anode outlet unit of a fuel cell system. The valve includes a valve body having a valve body chamber defining a valve seat. A valve tappet seats against the valve seat to close a flow channel in the valve through which a fluid flows. A ring heater is mounted within the chamber so that the fluid flows through a central opening in the ring heater, where the ring heater is in close proximity to the valve seat.