142.
    发明专利
    未知

    公开(公告)号:NL161401C

    公开(公告)日:1982-04-16

    申请号:NL7215364

    申请日:1972-11-13

    Abstract: A double-acting regeneratively controlled piston-cylinder device or tilt cylinder for tilting a spring-supported truck cab relative to the truck chassis to permit access to the truck engine positioned below the cab embodies means therein which enable slight relative reciprocating movement of the piston and cylinder from an "at rest" position in response to slight relative bouncing movement of the cab with respect to the chassis as the truck operates over-the-road. The piston-cylinder device is of the double-acting type and embodies means to provide an oil passage around the piston over part of the piston stroke. The oil passage may take the form of a concentric chamber, an eccentric chamber, a helical groove, or a longitudinal groove, each formed in the cylinder wall or may be a separate tube on the cylinder for by-passing the piston. Relative piston-cylinder motion results because, if the piston is pushed inwardly of the cylinder by cab bounce, oil can escape from the base end of the cylinder via the passage to the rod end of the cylinder. Or, if the piston is pulled outwardly of the cylinder by cab bounce, oil can flow from the rod end of the cylinder via the passage to the base end of the cylinder.

    144.
    发明专利
    未知

    公开(公告)号:MX145035A

    公开(公告)日:1981-12-16

    申请号:MX16818177

    申请日:1977-02-28

    Abstract: An apparatus and method for measuring toe in vehicle wheels. The apparatus ordinarily includes a pair of head units. Each of the head units is mounted upon one of the front wheels of the vehicle. Each head unit includes a projecting element for projecting a light beam generally laterally across the front of the vehicle and onto a target on the opposite head unit in determining front toe of the respective front wheels. Each head unit can also project a beam generally axially from the front wheel of the vehicle to a reflector on the adjacent rear wheel for determination of rear toe of the respective rear wheels. A metering device is connected operatively to signal generators on the head units for determining the toe in each front wheel in relation to a thrust-line reference calculated from the total rear toe of the vehicle.

    LOCKING CYLINDERS
    147.
    发明专利

    公开(公告)号:CA1093939A

    公开(公告)日:1981-01-20

    申请号:CA322569

    申请日:1979-03-01

    Inventor: SKOVER NICK JR

    Abstract: LOCKING CYLINDERS Disclosed are two embodiments of a locking cylinder. In both embodiments the locking cylinder comprises a housing, a working piston, a pilot piston, and a counter balance valve to substantially smoothen the operation of the working piston, particularly when an induced pressure is applied to the working piston. In the first embodiment, the pilot piston slides as a unit, although it may be formed in two axially separate parts. In the second embodiment, the pilot piston is formed in two axially separate parts, communicating bores are formed in the two parts, a ball valve is located in the bore in one of the parts, a free floating pin is disposed in the bores between the ball valve and an abutment surface in the other part, and the ball valve is biased shut. The pin is sized to unseat the ball valve when the two parts are in contact, but the two parts are biased apart by the action of the biasing means, which is transmitted through the pin to the abutment surface.

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