Abstract: Elastic rubber engine mounts with hydraulic damping are provided, especially for engine suspensions in motor vehicles. The mounts comprise two separated liquid-filled chambers, defined in part by elastic rubber-like peripheral walls adheringly connected with end walls and with a centrally disposed supporting element for connection to an engine supporting frame. The liquid chambers are separated by an elastic rubber-like partition connected with the supporting element, and flow connection between the two chambers is provided by perforations or choke openings in the partition. The rigid end walls of the two chambers are ridgidly interconnected. Arrangements are provided for minimizing or avoiding hydraulic damping of oscillations of low amplitude and high frequency, while providing hydraulic damping for oscillations of large amplitude and low frequency.
Abstract: The device comprises two armatures one of which is for connection to a support and the other is for connection to a suspended element. A block of elastic material is interposed between, and defines with, the two armatures a closed enclosure. A partition wall provided with at least one calibrated orifice is mounted by the periphery thereof on a first of the armatures and divides the enclosure into two chambers. A liquid fills one of the chambers and at least a part of the other chamber. The partition wall has a part which is movable with respect to the first armature in a direction perpendicular to the mean plane of the partition wall. The first armature has a stop for limiting the extent of the movement of the partition wall.
Abstract: A control valve for controlling the supply of pressurized fluid to a working element, such as a pneumatic spring, comprises a housing having a bore comprising first and second bore sections with a smaller diameter middle bore section. A connection for a source of pressurized fluid communicates with the first bore section; an outlet opening with the second bore section; and a working element, such as a pneumatic spring, is fed from the middle bore section. A valve stem is slidable within the middle bore section in response to displacement of the working element, and has a duct therethrough which can interconnect the first and the second bore sections but which can be closed off by a closure member in the first bore section. The closure member can also isolate the middle bore section from the first bore section.
Abstract: Apparatus for use in driving a pile by means of successive hammer blows at the same time as a vibratory force is to be applied to the pile comprises means for simultaneously transmitting, to a pile to be driven, a force produced by a hammer blow and a vibrating force which is generated by the application of the hammer blow.
Abstract: A pneumatic spring of the piston-and-cylinder type for use with the engine compartment hood or trunk lid of a motorcar and subject to explosive destruction in the event of an engine fire or a collision is provided with frangible, reduced wall portions in the cylinder and/or in the tubular piston rod which yields under excessive stresses and releases the compressed gas from the cylinder under conditions in which it cannot propel pieces of the fractured spring at high velocity.
Abstract: A gas-spring comprises a two-part piston assembly, with an outer piston which slides axially between two stops with respect to the piston rod, a damping passageway, and a valve seat on the piston rod against which the sliding piston seats.