Abstract: A sharpening device is provided for an edge of a ski which consists of a handle to be gripped by a hand of a person. A pair of Y-shaped flexible arms extend from the handle. A pair of sharpening members are also provided. A structure is for holding the sharpening members at reverse overlapping angles on distal ends of the arms. When used it will always result in a ski ,edge which is smooth and burr free. The sharpening members will make a proper bevel edge angle no matter what direction the device is held.

Abstract: A suspension device is provided for a seat of a bicycle which consists of a telescoping seat post for carrying the seat. The bicycle has a frame with a generally upright seat tube for receiving the seat post. A structure is for securing the seat post to the seat tube. An apparatus is within the seat post for absorbing a shock received to the frame, thereby eliminating a jarring condition normally caused to a rider sitting on the seat, while the bicycle travels over rough surfaces.

Abstract: A clip-on marker for electrical or optical leads or cables such as petrol engine spark plug leads having an elastomeric outer sheath comprises first and second half-shells that hinge together along one edge and clip together along the other edge to tightly encircle the lead. One half-shell has on its external surface raised or indented regions that are readily perceptible by touch and whose number identifies the marker. The other half-shell may carry a legible identifier. Markers may be moulded in sets, e.g. of six, via a single mold sprue.

Abstract: An assembly is provided of a filter bowl (10), a cartridge (12) and a head (11) in which the filter bowl (10) can be removed after it has descended from the filter head (11) through a distance corresponding to only a minor part of the length of the filter cartridge (12). The cartridge (12) is a push fit into a vertical port (52) in the filter head (11). Flange (18) of the cartridge (12) and a slotted buttress (44) of the bowl (12) establish a mechanical connection between the filter bowl (10) and the cartridge (12) so that the filter bowl (10) and the filter cartridge (12) are together mounted to and demountable from the filter head (11). The filter cartridge (12) having the support flange (18) that coacts with the buttress (44).

Abstract: A pilot-operated hydraulic control valve for use in conjunction with a solenoid modulator to provide brake pressure modulation on heavier vehicles, particularly in so-called automotive anti-lock systems. The pilot-operated slave unit has an inlet valve operable by travel of one piston and an exhaust valve operable by travel of another piston. One is a main piston which travels in response to pilot signal pressure and during part of its travel controls travel of the other piston, and an auxiliary piston, away from a stopped position towards which the auxiliary piston is biased. Thus, the valve has three distinct and stable positions (supply to delivery, delivery held, and delivery to exhaust), determined by the pilot signal pressure and the effort travel characteristic. It can, therefore, imitate as a slave unit, the pressure modulations of a three-state antilock solenoid valve but with increased fluid flow.

Abstract: A coupling for a pressure or vacuum fluid system having a bowl and filter head (10, 26) that connect together by relative rotation to engage bayonet coupling formations (32, 34, 94) thereof. When connected together the bowl (10) and filter head (26) have outer walls (16, 104) overlapping with an intervening seal (22) therebetween. A pressure relief valve (38) is provided in one of the members (10). A latch (36, 108) engages at an angular position of said members (10, 26) where the bayonet coupling is established to prevent relative rotation of said members (10, 26) and is prevented from engagement at other angular positions. The latch (36) is decoupled from the valve (38) when in its engaged state but is operatively coupled to the valve (38) when in a disengaged state to open said valve (38), fluid flow therethrough providing an audible warning when a pressure differental exists across the valve (38).

Abstract: A solenoid operated control valve for use as an inlet and/or exhaust valve in a pressure modulator has a flat valve element cooperating with a flat valve seat to control the flow of fluid through the valve. At least a portion of the solenoid armature has opposed parallel flat surfaces and is disposed within a gap defined between parallel faces for movement axially within the gap to operate the valve. The flat valve seat is disposed in the plane of one of the parallel faces and one of the parallel faces is a face of the stator. All required settings, more particularly, magnetic reach, the energized gap and excess valve travel to compensate for wear are set automatically by spacers. The spacers give the required settings directly from their own thickness and not through other component dimensions in combination.

Abstract: A hydraulic master cylinder piston carries a circumferential seal ring which allows recuperation flow valving. The floating seal has a reinforcing metal girdle which prevents radial expansion and axial crushing. The seal material resists extrusion and has an outer radius slightly greater than the radius of the circumferential girdle. A forward slotted bearing ring maintains the piston in alignment with the bore. During piston return, recuperation occurs through a path comprising the radial clearance between piston and floating seal ring and at least one slot or groove in the bearing ring. Upon full piston return, the seal is withdrawn from the master cylinder working chamber into a larger diameter bore communicating with the reservoir and thus allows relatively free make-up flow.

Abstract: An hydraulic control valve and particularly such a valve for use as an automotive brake pressure modulation valve to maintain optimum adhesion and traction between the tire of the vehicle and the road surface during braking when the wheel shows a tendency to lock. The valve comprises one or more solenoid operated valves in which the solenoid core defines a chamber for a fluid under pressure. Preferably the valve member is in the form of a spool connected to or constituting the armature and is slidable within the core. The core has a narrow waisted portion provided to establish a preferred flux part through the armature. This arrangement enables the core of the valve to withstand the necessary operating pressure without the need for complex and carefully controlled welding. Smaller solenoids can be used by pressure balancing the valves.

Abstract: A hose coupling for tractor-trailer braking systems which produce sealed hydraulic connections even in high pressure circuits, with minimum fluid loss on coupling and de-coupling. The coupling comprise male and female members which when brought together displace a sleeve along the spigot portion of the female member and simultaneously displace a plug along the bore of the male member to uncover sets of radial ports communicating respectively with supply and return passages to establish hydraulic flow and return paths through the coupling. The coupling also has means for locking the two members together.

Abstract: Spool type brake valve for use in motor vehicle braking systems. The valve has an exhaust valve assembly and an inlet valve assembly. The former having a spool displaceable by a brake pedal or the like to disconnect the brake-port from an exhaust port and the latter having a spool movable within a sleeve upon subsequent displacement of the exhaust valve to supply pressure fluid to the brake port.

Abstract: A tractor-trailer hydraulic braking system in which the tractor braking circuit and trailer braking circuit are inter-connected by releasable hydraulic couplings including both service and emergency line connections each with its associated return line. The trailer circuit also includes a pressure storage unit or accumulator and a emergency valve operable to apply the trailer brakes in the event of loss of emergency line pressure. To avoid leak down of the accumulator over a period following de-coupling of the trailer an expansion tank or chamber is connected into the trailer circuit so as to receive fluid leaking into the return lines from the accumulator and to retain such fluid until the pump can return it to the accumulator.