Abstract:
A pneumatic actuator for controlling the wastegate valve of an exhaust gas driven turbocharger includes a pilot piston (78) which is responsive to boost pressure to open only when a desired boost pressure is attained. Accordingly, premature opening of the wastegate valve is avoided because the main actuator piston (66) is maintained at atmospheric pressure until the desired actuating pressure is attained.
Abstract:
A polymeric film having superior oxygen barrier properties comprising at least three layers, two layers (12, 16) formed of an aliphatic polyamide such as poly(caprolactam) sandwiching a layer (24) formed of an aliphatic-aromatic polyamide such as poly(m-xylylene adipamide) or a blend of an aliphatic/aromatic polyamide such as poly(m-xylylene adipamide) with an ethylene vinyl alcohol copolymer.
Abstract:
This invention relates to a branched fractal three-dimensional porous polymer species which comprises rigid aromatic recurring units having electrophilic or nucleophilic reactive moieties on the exterior thereof. Another aspect of this invention relates to a star polymer comprising a polymeric core formed of the fractal polymers (FPS) of this invention having linear polymeric moieties grafted to the exterior thereof by way of residues formed by reaction between the reactive moieties on the exterior of the fractal polymer (FP) and complementary reactive moieties on a linear polymer. Yet another aspect of this invention relates to polymeric composites comprising a polymer matrix having dispersed therein the star polymers of this invention.
Abstract:
A vacuum brake booster (12) for use in a brake system (10) having a traction control function to selectively effect a brake appliction of driving wheels of a vehicle to synchronize the rotational spin thereof. The vacuum brake booster (12) has movable wall (62) which separates a housing (56) into a front chamber (58) and a rear chamber (60). The front chamber (58) is connected to the rear chamber (60) by a first passage (61), a bore (59) and a second passage (63) in the movable wall (62). A first control valve (66) located in the bore (59) controls communication of a first fluid through the first passage (61) to the bore (59) to equalize fluid pressure between the first (58) and second (60) chamber in a rest mode of operation and communication of a second fluid through the second passage (63) to create a pressure differential in the brake booster (12) to produce a first operational output in an operational mode of operation. The first operational output force is supplied to a master cylinder (14) form which pressurized fluid is supplied to the wheel brakes to effect a brake application for the vehicle. A second control valve (80) responsive to an operational signal from an electronic control unit (34) corresponding to rotational spin of the drive wheels of a vehicle, communicates an operational signal to means (88, 150) to interrupt communication of the first fluid between the front chamber (58) and rear chamber (60). The second control valve (80) thereafter initiates communication of a second fluid to the second chamber (80) to create a pressure differential to develop a second opertional output force. The second operational output force is supplied to the master cylinder (14) from which pressurized fluid is selectively communicated to the driving wheels to effect a brake application which synchronizes the rotational spin of the driving wheels.
Abstract:
An air bag (32) adapted to be inflated comprising: an inlet portion (36) to receive inflation gas and a flexible walled portion (40) including at least one first vent hole (42) therein; a flexible member (50), joined at one end thereof to the walled portion on one side of the first vent hole and at another end thereof to the walled portion on an opposite side of the first vent hole, the flexible member including at least a second vent hole (56), expansion joints (60, 70), formed in the flexible member and the walled portion for maintaining the first and second vent holes aligned during an initial phase of inflation so as to provide exhaust port (44) through which inflation gas may exit and for permitting the first and second holes to move relatively to one another during continued inflation so as to close the exhaust port.
Abstract:
An anti-rattle spring (11) is mounted in a backing plate (31) of one a pair of opposed backing plate and friction pad assemblies (15) in a generally planar parallel relationship with a rotor (17) engaging friction surfaces and stationary torque support members (19, 37). The spring (11) comprises a base portion (21) disposed in a plane which is generally parallel to the planes of the friction surfaces. The base portion (21) is fastened to one of the pads (15) through an elongated boss (39) in backing plate (31) and a corresponding hole (45) in the backing plate (31). The relationship between the elongated hole (45) and boss (39) prevents the anti-rattle spring (11) from rotating on the backing plate (31). The spring (11) also includes a web portion (23) which extends generally perpendicularly from the base portion (21) and a U-shaped resilient cantilevered blade (25) which extends from the web portion (23). The curved blade (25) has a free end (27) which engages the torque support member (19) to provide a resilient biasing between the torque support member (19) and the pad (15). The curved resilient cantilevered blade (25) extends initially from the web portion (23) in a direction away from the torque support member (19) and is subsequently curved back toward and into engagement with the torque support member (19). There is also a relatively flat resilient cantilevered blade (29) extending generally orthogonally from the base portion (21) in a direction opposite the web portion (23). This blade (29) will engage the brake rotor (17) during brake operation only if the thickness of the friction material of the outer brake assembly (15) is less than a predetermined thickness, thus providing an audible wear-limit warning.
Abstract:
Carbon-containing black glass compositions of matter having the empirical formula SiCXOY and derived from the precursor polymers obtained by reacting (a) cyclo siloxanes and (b) non-cyclic siloxanes, each of the reactants having either or both of hydrogen and an unsubstituted vinyl group whereby a polymer is formed by a hydrosilylation reaction.
Abstract:
An improved coating composition having one or more polymeric binders dispersed in a liquid medium, wherein the improvement comprises an anti-sag and anti-settling effective amount of a copolymer comprising a polymeric backbone comprising recurring monomeric units derived from monomers selected from the group consisting of one or more alpha -olefins and one or more unsaturated carboxylic acids, said backbone having grafted thereto, by a covalent amide linkage, one or more polymeric grafts comprising at least one recurring monomeric unit selected from the group consisting of: -NHC(O)RC(O)NHR1 and -NH-R-C(O)- or a combination thereof, wherein R is an alkylene group of at least about 2 carbon atoms, and R1 is R or aryl.
Abstract:
Current machines and methods for making sets of a plurality of magnetic ribbon for distribution transformer cores are disadvantageous because complicated feeding means, a complicated indexing transport system, and manual transport between the set forming and nesting locations are required. The present invention responds to the need in the art by providing a machine comprising: (a) means for feeding and cutting a plurality of magnetic ribbons to form a group; and (b) means for assembling a plurality of groups by moving all formed groups of the current assembly from the cutting means by an index distance. The present invention also provides a method of making sets of a plurality of magnetic ribbons for use in distribution transformer cores.
Abstract:
A polydiorganosiloxane that includes a moiety capable of imparting an end use characteristic to a base polymer and, preferably, a radical capable of reacting with a terminal or pendant group of the base polymer. The invention also includes a base polymer that is modified by forming a copolymer with the polydiorganosiloxane wherein a terminal functional group of the base polymer is bonded to the reactive radical of the polydiorganosiloxane and a process for making the copolymer. The base polymer preferably is a fiber-forming polymer such as polyamide and polyester. The polydiorganosiloxane acts as a carrier for the end use moiety.