Maruma Jyusharyo Kabushiki Kaisha

Maruma Jyusharyo Kabushikigaisha

Izumi Takahashi

Yasumitsu Moriki

Akira Tanaka

Masahiro Sakurai

Kazuyoshi Yamamoto

Tadashi Sato

Hidehiro Shimizo

Method to properly discriminate fitting pressure of articulated track links. Loading pressure in the ram of a track press is compared with both the lower and upper limit pressure values which are prescribed with reference to the range of fitting pressure specified for the links. Fitting of a link is determined acceptable when a sum of the press loading time is longer than a predetermined value while press pressure is maintained within the range between both the lower and upper pressure values; whereas it is determined unacceptable when the sum of press loading time is shorter than the predetermined one or when time in which press pressure exceeds the upper limit pressure is longer than a predetermined time.

Method of discriminating fitting pressure for links on a track press

This seal check apparatus is mounted on a track press and checks the airtightness of a track joint immediately after the completion of assembly of a track chain using the track press. The apparatus comprises a base assembly mounted on the track press; a vacuum head which is engageable with and disengageable from the track joint on the track press; a member provided with freedom of displacement on the base assembly and supporting the vacuum head with freedom of displacement; a first actuating member provided on the base assembly and displacing the vacuum head supporting member; a second actuating member provided on the vacuum head supporting member and displacing the vacuum head; a gas system for sucking gases from the vacuum head when the latter engages the track joint; and a control member for controlling the operations of both actuating members and the gas system.

Seal check apparatus for lubricant-enclosure type track joints of track

A first contact joint screwed to the open end of a lubrication oil passage bore within the shaft of a track roller whose surface is to be rebuilt by welding material thereto, bears cooling medium inlet and outlet ports, bears an intake tube whose length is such that one end is centered axially between radial oil passages constituting branches for the oil passage bore such that a cooling medium fed to the intake terminal of an intake/exhaust sleeve borne by the first contact joint circulates through the track roller in the area of welding for maintaining the track roller surface at relatively low temperature during welding of the built-up material to the periphery of the track roller.

Metal build-up apparatus with improved cooling means

Growing community of inventors

Tokyo, Japan

Izumi Takahashi