Komatsu Corporation

Matsushita Electric Industrial Co., Ltd.

Nitto-denko Corporation

Kansai Paint Company, Ltd.

Tatsuo Wada

Norihisa Matsumoto

Kouichi Yamada

Toshiomi Yabu

Tadashi Yoshino

Tsuyoshi Inoue

Tsuyoshi Yoshida

Kenichi Shibata

Teiji Yamamoto

Komaharu Matsui

Takeshi Eda

Tadayoshi Tatsuno

Kenji Kooriyama

Yutaka Kuwabara

Mitsuo Wakimoto

Masaru Hashirano

The blade apparatus includes a connection blade portion which is provided at its lower end with a central blade portion including a straight first cutting edge and having a second cutting edge which extends continuously with the first cutting edge through a predetermined angle rearwardly, and an end blade portion having a third cutting edge which extends continuously with a second cutting edge through a predetermined angle forwardly, wherein front surfaces of the blade portions are concave curved surfaces which are continuous from the upper end to the lower end, across line between the connection blade portion and the end blade portion and a cross point between the second cutting edge and the third cutting edge are located rearward of the cross point of the first cutting edge and the cross line between the central blade portion and the connection blade portion, and at least a central main region of the central blade portion is made of steel plate, and at least the connection blade portion and the end blade portion are integrally cast together with a back surface support portion and first and second brackets thereof.

Blade apparatus for work machine and work machine having the same

Concave front face surfaces of a blade device having ratios and configurations continuing from an upper end to a lower end of the blade device, and having a central face coupling front faces and end front faces on the right and left thereof.

Blade device for working machine and working machine mounting blade device

A blade has an overall blade width of W, and includes a central front portion, interposition front portions, and side front portions. A straight first edge section is arranged on the lower end of the central front portion. Each of the front surfaces of the central front portion, the interposition front portions, and the side front portions is formed in an arc-shaped surface that has a prescribed radius R. The radius Rsatisfies the following formula: R=(0.7 to 1.0)&#xd7;H, where H is the height from the edge of the first edge section to the top end of a soil retaining plate in side view in a digging posture when the edge angle &#x3b1; of the edge sections is an angle of 40&#xb0; to 55&#xb0;.

Work machine blade device and work machine including the same

Blade for construction machinery

To provide a roller for a crawler type traveling vehicle. The manufacture of this roller is streamlined by simplifying a structure for holding a seal mechanism between a bearing part and the outside and a thrust bearing and facilitating working while eliminating the need for welding. Roller pieces shaped to be axially separable are combined with a support shaft and formed integrally at a parting section (including a stepped engagement part and an external engagement part) by press fitting. The support shaft is provided with a projection for restraining the left and right roller pieces from moving in an axial direction.

Roller for a crawler type traveling vehicle

A blade mounting structure of a bulldozer capable of enhancing visibility and operability of a blade is provided. A left portion and a right portion of a blade and a vehicle main body are swingably connected with a set of left and right straight frames. The straight frames and the blade are swingably connected respectively by a hydraulic cylinder and a support member. The blade mounting structure includes an arm for connecting a single one of the straight frames and the blade to be swingable up and down and to the left and the right. A connecting point of the arm and the blade is provided on an axis line connecting horizontal axes of rotation of connecting points of the set of left and right straight frames and the blade in plane view.

Blade mounting structure of bulldozer

A blade mounting structure of a bulldozer capable of increasing visibility of a blade is provided. For this purpose, in the blade mounting structure in which a left and a right portions of a blade () and a vehicle main body are connected with a set of left and right straight frames () to be swingable up and down and to a left and a right, and the straight frames and the blade are respectively connected by a hydraulic cylinder () for tilt drive and a support member () to be swingable up and down and to the left and the right to be constituted to be capable of tilt drive, the blade mounting structure includes an arm () for connecting only any one of the straight frames and a substantially central portion of the blade to be swingable up and down and to the left and the right.

An adhesive-backed sheet for protecting painted surfaces comprising a supporting substrate having formed thereon a rubber-based pressure-sensitive adhesive layer compounded with a fatty acid glycerol ester.

Paint film-protective sheet

A tape speed control system for a multiple speed tape recording and reproducing apparatus comprising a transducer head for reproducing a tape speed indicative signal which has been recorded along an edge of a recording tape. The frequency of the reproduced speed indicative signal is compared with a plurality of reference values to determine to which one of separate frequency bands the frequency of the reproduced speed signal belongs. If the latter belongs to the frequency band other than the frequency band which includes a predetermined frequency derived when the playback speed equals to the recording speed, a corresponding motor drive signal is generated to vary the speed of the tape until the frequency of the reproduced speed signal reaches the predetermined frequency.

Speed control system for a multiple speed tape recording and reproducing

A magnetic tape recording and reproducing apparatus provided with means for recording a cue-signal which serves to mark a predetermined point of a magnetic tape on which video signals are recorded by a rotary magnetic head. The cue-signal is recorded by a full erasing head by supplying thereto a cue-signal current having a frequency lower than the frequency of the erasing current. For example, the cue-signal current is generated by using the control signal for synchronizing the rotation of the rotary head with the tape movement.

Magnetic recording and reproducing apparatus having means for recording

This invention relates to a speed control circuit of a d.c. motor having a frequency generator. To the conventional method in which a rotation detection signal is delayed by a monostable multivibrator circuit and this delayed signal and the rotation detection signal are gated to obtain a speed error signal, a new time-voltage converter circuit is added, whereby even if the detected frequency of the generator is low, a stable speed control is possible. Because of no error synchronization, the present speed control circuit is suited to an apparatus which requires speed switching, and also to semiconductor integration.

Growing community of inventors

Osaka, Japan

Tatsuo Wada