摘要:
A failsafe, foolproof control valve for a tractor-trailer air brake system which, among its other features, permits the tractor brakes to remain in a parked position while the trailer system is being pressurized. The control valve includes four ports, two of which communicate with a first valve chamber and the other two communicate with a second valve chamber. A spring biased first plunger is disposed within the first chamber and a manually operable second plunger extends within the second chamber. Movement of the second plunger establishes several operating modes of the valve to provide various fluid flow paths between the ports in a predetermined manner. At least one of these modes automatically repositions the second plunger to its normal operating mode after the trailer system has been optionally pressurized by actuation of a conventional park valve.
摘要:
A hydraulically operated booster brake mechanism which operates in response to movement of a brake pedal to move an output member to produce braking when a source of hydraulic pressure is available to assist such braking and also in the absence of such hydraulic pressure by employing a pair of differential pistons which, when the power brake is pressurized, separate to afford greater movement of the output member than of the pedal. The pistons move as a unit to afford equal output and input movement in the absence of any pressure and are so arranged that at runout when the maximum pressure from the source has been used, the pistons remain separated but move as a unit to afford equal output and input movement.
摘要:
A failsafe, foolproof control valve for a tractor-trailer air brake system which, among its other features, permits the tractor brakes to remain in a parked position while the trailer system is being pressurized. The control valve includes four ports, two of which communicate with a first valve chamber and the other two communicate with a second valve chamber. A spring biased first plunger is disposed within the first chamber and a manually operable second plunger extends within the second chamber. Movement of the second plunger establishes several operating modes of the valve to provide various fluid flow paths between the ports in a predetermined manner. At least one of these modes automatically repositions the second plunger to its normal operating mode after the trailer system has been optionally pressurized by actuation of a conventional park valve.
摘要:
A hydraulic booster is provided with a pressure responsive dump valve and check valve arrangement which permits the booster to employ an accumulator ideally responsive to automotive brake applications. The check valve is operable to automatically charge the accumulator when the booster fluid source is called upon to supply fluid at operating pressure to the booster or other devices. The dump valve includes a stepped piston arrangement biased into a closed position by backpressure from the fluid source and operable by accumulator pressure to automatically dump the accumulated charge to the booster when source backpressure drops below a predetermined value.
摘要:
A railway car coupler having its butt end pivotally connected by a vertically extending cylinderical pivot pin to the forward ends of the two vertically spaced arms of a horizontal yoke housing a conventional draft gear and flat faced front follower has a butt end surface of extended width with a flat central surface portion of at least 4-1/2 inches width extending perpendicularly to the longitudinal axis of the coupler and tangentially joining at each side with corresponding convexly curved relieved contour side end extensions for rocking engagement with the front follower with minimal wear therebetween while also providing effective alignment control means for the coupler.
摘要:
A coupling for shaft-to-shaft power transmission which comprises two externally toothed hubs for attachment to opposing shaft ends, and an internally toothed sleeve in mesh with the teeth of the hubs. The sleeve is constructed in two or more arcuate sections normally secured together over the hubs by an encircling band-like member.
摘要:
An automatically operated vehicle air suspension system including a pump, a reservoir and suspension units between sprung and unsprung portions of the vehicle all interconnected in a closed air system containing a charge of air and employing a control mechanism responsive to changes in the vertical spacing between sprung and unsprung portions to increase or decrease air pressure in the suspension units by pumping air from the reservoir to the suspension units or from the latter to the reservoir.
摘要:
A throat mix burner providing efficient air and fuel mixing, flame stability, high turndown ratio and safety. These results are achieved through selected size relationships among the various dimensions of the burner combustion chambers.
摘要:
A knuckle-type railway car coupler having a modified 10A coupler contour wherein the pulling face of its pivoted knuckle is offset approximately five-sixtyfourths inch closer to the front face of the coupler head, and the heel and adjacent front face portions of the knuckle are relieved and contoured along a smooth compound convex curve formed by several radii to provide a tightened coupler contour of substantially reduced slack compared to the standard 10A contour. The knuckle further has the portion of the inner side wall of its tail portion adjacent and extending rearwardly from its throat section relieved along a smooth concave curve of substantial radius to prevent binding between couplers during uncoupling.
摘要:
Disclosed is apparatus for separating a dispersed liquid from a dispersion of two immiscible liquids wherein a shell is constructed with a bulkhead wall on which pairs of coalescing units are cantilever supported from opposite sides and in end-toend communicating relationship through an opening of the wall in alignment with respective aligned center cavities of each pair of units. The units comprise removable liquid permeable coalescing media in cylindrical form which are removable from tubular supports of the units fixed to the wall. The units are closed at the distal ends to cause liquid to flow radially into one unit, then through the wall, and radially out of the associated unit. The shell is built in sections to separate in planes adjacent to the distal ends of the units so that the shell may be opened and the coalescing media easily and quickly replaced.