Abstract: Systems and methods provide active control of rotor cooling. In a number of embodiments, a system includes a controller coupled with an electric machine having a rotor. The controller evaluates parameters related to the electric machine for flow rate requirements of the rotor, where the flow rate requirements relate to cooling of the rotor. A flow rate of a fluid for cooling the rotor is computed, where the flow rate is based on a composite of the flow rate requirements. A control valve signal is delivered to set a control valve to supply the flow rate to the rotor based on the parameters.

Abstract: A shock absorbing apparatus includes a flexible membrane defining an accumulator cavity, and a compression assembly defining a compression cavity. The compression assembly is disposed within the flexible membrane such that viscous fluid contained within the cavities may be exchanged therebetween by a damping orifice, fluid conduit and or valve mechanism. The accumulator cavity deforms in response to the application of a transmitted impact load, and is capable of storing and releasing potential energy in response to the application and cessation of the transmitted impact load.

Abstract: An actuator includes a piston assembly movably disposed within an assembly housing having a fixedly supported end and an opposing end that receives a movable piston assembly. The piston assembly includes a piston rod and an attached piston head having a fixed orifice as well as an orifice with a check valve to create rate control of the assembly. Hydraulic fluid is caused to move through the axially movable piston head based on compressive and tensile loads imparted to the assembly. A plurality of pre-loaded springs are configured to selectively provide pressure relief in the event the orifices of the piston become clogged, wherein the plurality of pre-loaded springs, such as disc springs, further provide an energy absorbing function of the assembly based on loading conditions.

Abstract: A shock absorbing apparatus includes a flexible membrane defining an accumulator cavity, and a compression assembly defining a compression cavity. The compression assembly is disposed within the flexible membrane such that viscous fluid contained within the cavities may be exchanged therebetween by a damping orifice, fluid conduit and or valve mechanism. The accumulator cavity deforms in response to the application of a transmitted impact load, and is capable of storing and releasing potential energy in response to the application and cessation of the transmitted impact load.

Abstract: A shock absorbing apparatus includes a flexible membrane defining an accumulator cavity, and a compression assembly defining a compression cavity. The compression assembly is disposed within the flexible membrane such that viscous fluid contained within the cavities may be exchanged therebetween by a damping orifice, fluid conduit and or valve mechanism. The accumulator cavity deforms in response to the application of a transmitted impact load, and is capable of storing and releasing potential energy in response to the application and cessation of the transmitted impact load.

Abstract: An actuator includes a piston assembly movably disposed within an assembly housing having a fixedly supported end and an opposing end that receives a movable piston assembly. The piston assembly includes a piston rod and an attached piston head having a fixed orifice as well as an orifice with a check valve to create rate control of the assembly. Hydraulic fluid is caused to move through the axially movable piston head based on compressive and tensile loads imparted to the assembly. A plurality of pre-loaded springs are configured to selectively provide pressure relief in the event the orifices of the piston become clogged, wherein the plurality of pre-loaded springs, such as disc springs, further provide an energy absorbing function of the assembly based on loading conditions.

Abstract: A shock absorbing apparatus includes a flexible membrane defining an accumulator cavity, and a compression assembly defining a compression cavity. The compression assembly is disposed within the flexible membrane such that viscous fluid contained within the cavities may be exchanged therebetween by a damping orifice, fluid conduit and or valve mechanism. The accumulator cavity deforms in response to the application of a transmitted impact load, and is capable of storing and releasing potential energy in response to the application and cessation of the transmitted impact load.

Abstract: A damping assembly for a pivoting stowage bin includes a rotary hydraulic damper that is mounted on the pivot axis of the stowage bin. The rotary hydraulic damper includes a damper body that receives a rotor having at least one vane moved through contained hydraulic fluid. Preferably, an exterior bearing surface on the damper precludes the active damping elements from radial loads, while a distributed attachment of the rotor to the pivoting bin enables reduced torque loads. The damper can include an integrated flow-control valve for controlling the opening rate of the pivoting bin as well as an integrated mechanical stop for the bin.

Abstract: A weight compensating shock isolator assembly includes at least one spring with preload to return the isolator to an initial position, the at least one spring exerting a spring force that changes during the isolator stroke. The isolator includes a hydraulic cylinder containing hydraulic fluid and a piston that moves relative to the hydraulic cylinder, wherein hydraulic fluid is forced through or around a piston head during relative movement thereof with respect to the hydraulic cylinder to create a resisting force that is stroke and velocity dependent, with the damping constant C changing with stroke.

Abstract: A damping assembly for a pivoting stowage bin includes a rotary hydraulic damper that is mounted on the pivot axis of the stowage bin. The rotary hydraulic damper includes a damper body that receives a rotor having at least one vane moved through contained hydraulic fluid. Preferably, an exterior bearing surface on the damper precludes the active damping elements from radial loads, while a distributed attachment of the rotor to the pivoting bin enables reduced torque loads. The damper can include an integrated flow-control valve for controlling the opening rate of the pivoting bin as well as an integrated mechanical stop for the bin.

Abstract: A weight compensating shock isolator assembly includes at least one spring with preload to return the isolator to an initial position, the at least one spring exerting a spring force that changes during the isolator stroke. The isolator includes a hydraulic cylinder containing hydraulic fluid and a piston that moves relative to the hydraulic cylinder, wherein hydraulic fluid is forced through or around a piston head during relative movement thereof with respect to the hydraulic cylinder to create a resisting force that is stroke and velocity dependent, with the damping constant C changing with stroke.

Abstract: A recoil pad for a shoulder firearm includes at least one piston member that is caused to move axially from an initial axial position to a second axial position upon application of the recoil force from the firearm. The axial movement of the piston member causes fluid movement within a column relative to a variable or fixed orifice area wherein the fluid movement causes resistance that absorbs the energy. A mechanical and/or hydraulic and/or elastomeric feature returns the piston to the initial axial position upon cessation of the applied recoiling force.

Abstract: A diffuser saddle connection is used for the attachment of diffusers on submerged air laterals in systems that treat municipal and industrial waste water. A top saddle surface and a bottom saddle surface enclose a portion of a feed pipe. A spout attached to the bottom saddle surface is solvent-welded to a tee, which is threadedly engaged to a diffuser. Flexible bushings on a nipple attached to the tee relieve stress on the connection between the diffuser and the diffuser saddle connection. An open end allows water to flow into the diffuser pipe to provide hydrostatic equilibrium and to reduce buoyancy.

Abstract: A diffuser saddle connection is used for the attachment of diffusers on submerged air laterals in systems that treat municipal and industrial waste water. A top saddle surface and a bottom saddle surface enclose a portion of a feed pipe. A spout attached to the bottom saddle surface is solvent-welded to a tee, which is threadedly engaged to a diffuser. Flexible bushings on a nipple attached to the tee relieve stress on the connection between the diffuser and the diffuser saddle connection. An open end allows water to flow into the diffuser pipe to provide hydrostatic equilibrium and to reduce buoyancy.

Abstract: A diffused aeration method carried out in an aeration tank which contains a plurality of coarse bubble jet diffusers and a plurality of fine bubble jet diffusers strategically located to provide aeration in an inductive downward flow stream induced by the coarse bubble jet diffusers. The method increases oxygen transfer efficiency and mixing with little or no increase in operating power costs.

Abstract: A diffused aeration system has an aeration tank which contains a plurality or peripheral coarse bubble jet diffusers and a plurality of fine bubble jet diffusers strategically located therebetween to provide maximum oxygen transfer efficiency and mixing with little or no increase in operating power costs.

Abstract: A diffused aeration system has an aeration tank which contains a plurality or peripheral coarse bubble jet diffusers and a plurality of fine bubble jet diffusers strategically located therebetween to provide maximum oxygen transfer efficiency and mixing with little or no increase in operating power costs.