Abstract: A pressure compensation valve is capable of distributing of an output pressurized fluid of single pressurized fluid supply source to a plurality of hydraulic loads. The pressure compensation valve is constructed with a check valve portion formed by providing, in a valve body, a valve for establishing and blocking communication between an inlet port and an outlet port, and a pressure reduction valve formed by providing, in the valve body, a spool establishing communication between a second port and a third port by a pressure in a first pressure chamber communicating with a first port and blocking communication between the second port and the third port by a pressure in a second pressure chamber communicating with the third port. The spool is biased in a direction for blocking communication between the second port and the third port by a spring while contacting the valve.

Abstract: In an electro-photographic photosensor wherein amorphous silicon as a photoconductive layer is formed on the surface of an aluminum base which has been processed to be alumite layer consisting of a porous layer and barrier layer, amorphous silicon is formed directly on the surface of the porous layer in which porosities is remained by the elimination of the process of sealing porosities. Further, when aluminum is processed by electrolyzation to be alumite, thickness of the barrier layer and the porous layer are appropriately set to provide good adhesive strength of amorphous silicon to the aluminum base and good electrostatic characteristics by adjusting respectively a voltage and duration of the electrolyzation.

Abstract: This invention relates to a front frame (50) constituting a front portion (2) of a so-called articulated wheel mounted type loader (1) of a vehicle in which the front portion (2) and a rear portion (3) are separated but coupled together. The front frame (50) is constituted by a lower frame (20) adapted to support the front frame, and a upper frame (40) secured to the lower frame (20) and formed with a bucket cylinder pivot (32), a boom pivot (30) and a boom cylinder pivot (31). Particularly, the upper plate (40) is made up of a single plate (41) provided with a bucket cylinder pivot (30) and a boom pivot (30) and a pair of boom cylinder pivot members (42) connected to both ends of the single plate (41) and respectively provided with boom cylinder pivots (31). Pivot openings are provided for the upper frame (40). The upper frame (40) is handled as a unit when the upper frame (40) is mounted on the lower frame (20).