Abstract: An inflation viewing device has a main body which is externally provided with a transparent viewing portion and internally provided with an inner passage where an air path assembly is arranged. An air entrance connector is operatively connected to an external air source and to a first end of the main body. An air exit connector is connected to a second, opposed end of the main body and to an inflation valve. A guide spacer is provided between the air entrance connector and the main body. The guide spacer has an inner passage having a wider section in communication with the inner passage of the main body and a reduced section defining a communication opening with the air entrance connector. A filter is arranged in the communication opening. A plunger, biased by a spring, is slidably arranged within the inner passage of the guide spacer and guide section of the main body inner passage.

Abstract: A tire inflation viewing device that enables to view the proper operation of the inflation arrangements and that, in turn, enables to determine which of all of the tires is being inflated and has an air leak.

Abstract: An autonomous valve assembly for the regulation, depressurization and elevation of the pressure in pneumatic equipment that presents a valve body 22 and an air regulator body 4 with a compressed air intake 54 connected to a source of compressed air, whereby the body 4 presents two pressure regulators 45, 46 that regulate the pressure at a desired level and communicate it to an air diverter plunger 6 with reciprocating movement to cyclically divert the compressed air to a pressurization plunger assembly 9A, 5, 9B that has a reciprocating movement within a pressure casing 20A, 20B, wherein said air pressure regulators 45, 46 are adjusted to regulate the passage of air to a first pressure and a second pressure.

Abstract: An autonomous valve assembly for the regulation, depressurization and elevation of the pressure in pneumatic equipment that presents a valve body 22 and an air regulator body 4 with a compressed air intake 54 connected to a source of compressed air, whereby the body 4 presents two pressure regulators 45, 46 that regulate the pressure at a desired level and communicate it to an air diverter plunger 6 with reciprocating movement to cyclically divert the compressed air to a pressurization plunger assembly 9A, 5, 9B that has a reciprocating movement within a pressure casing 20A, 20B, wherein said air pressure regulators 45, 46 are adjusted to regulate the passage of air to a first pressure and a second pressure.

Abstract: A pressure-controlled three-way valve device for inflating, keeping inflated and deflating tires, the device having a plunger axially traversed by an inlet passage normally closed by a spring-urged inlet valve. The plunger's outer sidewall has a recess in which an O-ring extends to abut against the steps of the recess to limit the plunger stroke and keep an outlet circuit closed to a venting port formed in the sidewall of the body of the device. The plunger moving between a position to open air supply to the tire, a position to keep an outlet circuit to a tire closed and a position to open a venting port to deflate the tire. The plunger being mounted into the valve body by a diaphragm sealing an outer wall of the plunger against the valve body and permitting the moving of the plunger with minimal friction between the plunger and the valve body.

Abstract: A rotary pneumatic coupling (25) is disclosed, in which the vehicle axle (19) is used as a support for the installation piping. The coupling shaft (49) has an end formed as a nozzle projecting towards the wheel plane and arranged as an axial extension of the vehicle axle end. The shaft is rotatably and slideably supported by a pair of ball bearings (47) inside a block (35-37) secured to the wheel hub cap (39). The internal shaft conduit (51) leads to a chamber (45) having ports for connection to the tires after passing through the respective chamber valve. The shaft abuts against an axially movable plug (57) closing the chamber and having an axial hole as an extension of that conduit. An axial shift of the shaft relative to the plug opens the chamber to a vent port (65). This situation causes a status indicator light (27) to light up in the panel of a control module provided in the trailer within the field of view of the rear-view mirror (33).

Abstract: A remote pressure-controlled three-way valve device has a plunger axially traversed by an inlet passage normally closed by a spring-urged inlet valve. The plunger's outer sidewall has a recess in which an O-ring extends to abut against the steps of the recess to limit the plunger stroke and keep an outlet passage closed to a venting port formed in the sidewall of the body of the device. O-ring prevents short-circuits between the inlet passage and the vent port and a spring for counteracting friction between the O-ring and the device inner wall. Filters arranged in respective ports connectable to the input air-pressure supply and the tire inner tube provide fixed seats for the springs to bear on. The plunger may dwell in a stable intermediate position that opens the outlet or deflation passage is controlled by sending an air pressure through the inlet port at 50% of the normal pressure.

Abstract: An evaporating unit whose cabinet incorporates an external hot air intake for its acclimatization is disclosed. The external air intake is located in the base of the cabinet and has grids arranged around the three sides of the base, that is to say a grid close to the front edge and two grids following the two side edges of the base of the cabinet.

Abstract: An oil-gauge for the axle-end of a vehicle includes a transparent or translucid lid (15) for inspecting the level of oil in a chamber (13) housing the wheel-mounting bearings. A disk partition (23) is bolted to the inside of the lid to form a shallow subchamber (25). The disk is provided with orifices for oil level in the subchamber to follow the oil level in the main chamber. The visible surface (29) of the disk is painted white and the subchamber houses one or more loose elements (31) to wipe the inside of the lid clean.

Abstract: A cooling unit includes a housing (1) with an evaporating unit (7) installed on the inclined roof of a cabin and an external water reservoir (29) with a rising pump (31) installed lower down, between the cabin and the rear part of a truck. The return hose (15′) of the excess water gutter (45) coming from the evaporator has an upper end (14) connected to the front part of the gutter and then it crosses a rising stretch to leave by the rear part of the housing and descending down to its lower end which is connected at the outlet of the pump, together with the feed hose (6) of the evaporator by means of a coupling (47). The pump control is intermittent, with a duty cycle lower than 10%, sufficient to purge the return hose.

Abstract: A pneumatic rotary coupling (25) for an air pressure installation for one or more wheels of a vehicle, in which the wheel's axle (11) is used as the section of the pipe of the static installation, in accordance to the system of the coupling used. The coupling's stem (49) has one end formed in the shape of a nozzle which extends in the plane of the wheel, disposed as an axial extension of the wheel's axle end. The stem is located rotatable and slidable inside block (35) which is fixed to the wheel's hub cover. A cover (37) fixed to the block presents a cavity (45) with an edge that defines a seat for a plastic bushing (47) that supports the coupling's stem. The external surface of this bushing is conformed by grooves (53) that communicate the cavity towards the orifices linking with the tires. One method allows for the detection of bearing faults using the same coupling when the axial sliding of the stem is sufficient to vent the pressurized air.

Abstract: Method for monitoring oil state which combines optical transmissivity of oil with certain kinds of optoelectrical optodetector. In particular, the oil state in automatic gearboxes is monitored to detect lack of oil quantity or quality and, furthermore, to detect malfunction of gearbox mechanisms. A region of the oil is scanned with infrared oil and the amount of light reaching straight accross a short gap in said region is detected to derive monitoring information.

Abstract: A pressure sensor for an apparatus for controlling and maintaining air pressure in vehicle tires. The vehicle compressor outlet is connected through individual pneumatic tire circuits to each vehicle tire, via rotary couplings in the associated axles. Each tire circuit includes tubing for carrying air and monitoring tire pressure, the circuits supporting pressure sensors and electrovalves housed in a control unit in the dashboard of the vehicle. The sensor includes a piston which causes a shutter to move in and out of the light path of a LED/phototransistor device. When the sensor signals low tire pressure via a an electronic circuit, the corresponding electrovalve is energized for the compressor to pump the tire up back to its set pressure. The sensor further includes means for varying the set point.

Abstract: A device for separating liquid particles from compressed air transported therthrough, to protect machine parts connected thereto. The device is simple to manufacture, easy to maintain and can be made of low-cost materials such as injection molded plastics. A cylindrical housing has an inlet and an outlet at opposite ends thereof for coupling into the installation. A plurality of cones are formed into a vertical pile and closely spaced from one another. Each cone has a concave deflector surface opening out towards the inlet and an orifice cut out at one point on the edge of the cone. The cones are mounted inside the housing and their edges fit closely against the inner wall surface of the housing so that the orifices of consecutive cones are offset 180.degree. apart.

Abstract: Apparatus for controlling and maintaining air pressure in vehicle tires. The vehicle compressor outlet is connected through individual pneumatic tire circuits to each vehicle tire, via rotary couplings in the associated axles. Each tire circuit includes tubing for carrying air and monitoring tire pressure, the circuits supporting pressure sensors and electrovalves housed in a control unit in the dashboard of the vehicle. The control unit also houses electronic circuits interfaced with the sensors and electrovalves. The sensor includes a piston which causes a shutter to move in and out of the light path of a LED/phototransistor device. When it signals low tire pressure to the electronic circuit, the corresponding electrovalve is energized for the compressor to pump the tire up back to its set pressure. A front panel has LEDs and gauges for the driver to keep tabs on events.

Abstract: Mounting block for a shaft opened at an end and having in its interior a series of decreasing diameter chambers, defining in the first chamber a bearing with a plurality of balls retained between two races. An outer race forming the block cover and in turn housing an upper retainer and an inner race attached to the shaft providing the other mating surface for the bearing. Following the inner race, a washer is mounted fitting on its periphery against a cylindrical projection of the first race. Next, a second inner retainer is mounted in the second chamber. The axially drilled shaft has, mating with the third chamber, a cross hollow pin communicating with the chamber, which in turn communicates with the outside by means of two radial passages made in the body, these passages ending in outer nozzles. The axial conduit of the shaft exits, at an angle of 90.degree., through the end exiting from the block opening.