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55191 results about "Piston rod" patented technology

In a piston engine, a piston rod joins a piston to the crosshead and thus to the connecting rod that drives the crankshaft or (for steam locomotives) the driving wheels. Internal combustion engines, and in particular all current automobile engines, do not generally have piston rods. Instead they use trunk pistons, where the piston and crosshead are combined and so do not need a rod between them. The term piston rod has been used as a synonym for 'connecting rod' in the context of these engines.

Medication delivery device with bended piston rod

The invention relates to: A portable medication delivery device (1) comprising a medication cartridge (11) having an outlet (111) and a movable piston (112), and a housing (12) for holding said cartridge, and a flexible piston rod (13) being operable to engage and displace said piston along an axis (113) of said cartridge, and guiding means (14) for bending said piston rod away from said axis, and actuating means (15), and driving means (16, 17) for transferring movement from said actuating means to said piston rod, said driving means including a driving wheel (17) for displacing the piston rod (13), said flexible piston rod comprising regularly spaced first members (330; 331; 332) adapted to mechanically cooperate with corresponding second members (171) on said driving wheel. The object of the present invention is to provide a medication delivery system that combines compactness with an improved accuracy. The problem is solved in that said flexible piston rod (13) exhibits a linear or approximately linear path between said driving wheel (17) and said piston (112). This has the advantage of yielding a compact, low-weight device with an improved dose accuracy. The invention may e.g. be used in injection or infusion devices for a person's self-treatment of a disease such as diabetes.
Owner:NOVO NORDISK AS

Medication delivery device with bended piston rod

The invention relates to: A portable medication delivery device (1) comprising a medication cartridge (11) having an outlet (111) and a movable piston (112), and a housing (12) for holding said cartridge, and a flexible piston rod (13) being operable to engage and displace said piston along an axis (113) of said cartridge, and guiding means (14) for bending said piston rod away from said axis, and actuating means (15), and driving means (16, 17) for transferring movement from said actuating means to said piston rod, said driving means including a driving wheel (17) for displacing the piston rod (13), said flexible piston rod comprising regularly spaced first members (330; 331; 332) adapted to mechanically cooperate with corresponding second members (171) on said driving wheel. The object of the present invention is to provide a medication delivery system that combines compactness with an improved accuracy. The problem is solved in that said flexible piston rod (13) exhibits a linear or approximately linear path between said driving wheel (17) and said piston (112). This has the advantage of yielding a compact, low-weight device with an improved dose accuracy. The invention may e.g. be used in injection or infusion devices for a person's self-treatment of a disease such as diabetes.
Owner:NOVO NORDISK AS

Laser fusing and coating process for wear resistant and etch-resistant coating of hydraulic support column cylinder and piston rod

A laser cladding process of the wear-resisting anticorrosive coating of a hydraulic pressure support pillar cylinder barrel or a piston rod cylinder barrel comprises procedures as follows: the surfaces of the standing pillar cylinder barrel and the piston rod cylinder barrel are pretreated; the surfaces of the standing pillar cylinder barrel and the piston rod cylinder barrel are decreased, de-rusted and cleaned up by alcohol under room temperature; alloying powder is chosen and an automatic powder feeder is adjusted; the iron base alloying powder with good wear-resisting anticorrosive property and sound metallurgy compatibility with a matrix is selected and the iron base alloying powder contains major constituents, including Fe, C, Cr, Ni, Mo, Si, N, Nb, Ta and B; and at last, the automatic powder feeder is adjusted. Adjusting the automatic powder feeder can lead the alloying powder from an automatic feeding end to a laser melting pool and feeding amount is adjusted so that the thickness of the alloying coating reaches 0.6mm to1.2mm. The alloying coating of the invention is even and dense and has good wear-resisting anticorrosive property. Compared with galvanization, the wear-resisting anticorrosive property and the service life of the standing pillar cylinder barrel and the piston rod manufactured by the invention are greatly improved.
Owner:CHONGQING JIANGLU LASER TECH

Precision vibration damping assembly and vibration damping platform composed of the assembly

The invention discloses a precision damping component and a damping platform composed of the precision damping component, and the damping platform has damping function and positioning function along a Z direction. The precision damping component comprises a passive damping part, an active damping actuator and an external frame. The passive damping part is a piston rod with a structure of double cavities, an air pocket and a pressure cavity are respectively positioned in the two cavities, and the air pocket has larger longitudinal bracing power and lower rigidity, and can isolate the vibration of attenuation high frequency. The active damping actuator is a linear voice coil motor connected in parallel with the passive damping part, and applies acting force to a passive object according to the vibration condition and location information of the controlled object, so as to drive the controlled object to move to a designated position and compensate the vibration. The damping platform composed of at least three precision damping components has the functions of vibration damping with a plurality of degrees of freedom, accurately positioning along the Z direction, focusing and leveling. The precision damping component and the damping platform can be used in the apparatus with precision damping requirements such as mask aligners, ultra-precision numerically-controlled machine tools, biochip scanners and the like.
Owner:HUAZHONG UNIV OF SCI & TECH

Controllable damping force hydraulic shock absorber

A controllable damping force hydraulic shock absorber including a pilot type damping valve having a back-pressure chamber for each of an extension stroke and a compression stroke. A piston connected to a piston rod is fitted into a sealed cylinder in which a hydraulic fluid is contained. During an extension stroke of the piston rod, the hydraulic fluid in an upper cylinder chamber flows to a lower cylinder chamber through an extension-side hydraulic fluid passage, an extension-side orifice hydraulic fluid passage, an extension-side back-pressure chamber, an axial hydraulic fluid passage, a radial hydraulic fluid passage, a compression-side back-pressure chamber, an extension-side check valve and a compression-side hydraulic fluid passage. During a compression stroke, the hydraulic fluid in the lower cylinder chamber flows to the upper cylinder chamber through the compression-side hydraulic fluid passage, the compression-side orifice passage, the compression-side back-pressure chamber, the radial hydraulic fluid passage, the axial hydraulic fluid passage, the extension-side back-pressure chamber, the compression-side check valve and the extension-side hydraulic passage. The hydraulic fluid passage for an extension stroke and the hydraulic fluid passage for a compression stroke have some elements in common, thus simplifying the structure of the controllable damping force hydraulic shock absorber.
Owner:HITACHI ASTEMO LTD
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