Kabushiki Kaisha Morita Seisakusho

J. Morita Manufacturing Corporation

Minoru Watanabe

Masanori Otsuka

Kozo Nakano

Kazuyuki Fujita

Takahiro Yoshimura

Akifumi Tachibana

Keisuke Mori

Takahiro Matsui

Eiichi Arai

Mitsuhiko Hotta

Kouichi Sonobe

Takanori Shigihara

Takashi Bessho

The invention provides a medical radiographic apparatus constituted such that a swivel arm possessing an X-ray generator and an X-ray detection plane disposed to confront mutually with respect to the head of a patient is supported with a post through swivel means and a holding frame thereof in order to move the swivel arm about the head of the patient, the X-ray generator and X-ray detection plane are moved in mutually parallel reverse directions while synchronized, and irradiated X-rays are allowed to always enter the X-ray detection plane by passing through the same exposure region in the desired plane section in cooperation with the movement, the apparatus comprising:

Medical radiographic apparatus and patient's head fixing device

A planigraphic X-ray apparatus comprising a rotation mechanism for rotating a support member which supports an X-ray generator and an X-ray detection surface to rotate the X-ray generator and the X-ray detection surface around a subject, a position adjustment mechanism for setting the position of the rotation center of the support member rotated by the rotation mechanism and a linear movement means for moving the support member in the direction approximately perpendicular to the direction of the X-ray irradiated from the X-ray generator, whereby the X-ray detection surface is driven in the direction opposite to the movement of the linear movement means and the X-ray generator is rotated toward the X-ray detection surface in synchronization with the movement of the linear movement means. The position adjustment mechanism and the rotation mechanism are used only to set the position and direction of the support member with respect to the subject, and planigraphic photographing is possible only by moving the support member using a linear movement means exclusively provided for the support member, thereby facilitating the positioning operation of the support member with respect to a given planigraphic plane, simplifying the control program and making the entire apparatus compact and inexpensive.

Planigraphic X-ray apparatus

A dental treatment chair including a seat, a backrest tiltably attached to the seat, and a drive means for tilting the backrest. The chair includes a unit table which stays horizontal and moves and up and down as the backrest tilts, and the table is further connected to the backrest by a longitudinal shaft and a support shaft so that it can freely rotate in a horizontal plane. By means of this structure, an operator can take a position convenient to access treatment tools and to take a position opposite to the unit table in response to each tilting phase of the backrest.

Dental chair

A hanger arm mechanism to hold a lamp head vertically rotatably in dental lighting equipment is directed to a mechanism designed to rotate the lamp head around the axis shaftline of the hanger arm and to stop the same in a desired position, with the result that the field of lighting of the shadowless lamp mounted inside the lamp head can freely be changed in the range of rotation of the lamp head without making the patient turn his head.

Hanger arm mechanism in dental lighting equipment

This disclosure relates to a control device of transmitting an ultrasonic pulse from an ultrasonic transmitter to an ultrasonic receiver by disposing the transmitter and the receiver between two movable members which are placed in a variable relation in linear distance with each other, converting aerial propagation time of the pulse from the transmitter to the receiver into an electrical means, memorizing and holding a distance between the two members by the electrical means, and reading the memorized distance at any desired time and reproducing the distance. The disclosure also relates to a control device using the system.

Control system of and device for memorizing, reading and reproducing the

A dental treatment system comprising a treatment chair seat, a backrest mounted tiltably thereto, and a headrest characterized in that the device includes a unit box assembly adapted to be stored inside or underside the backrest and to be drawn out therefrom. The unit box assembly having a variety of instruments housed therein is designed such that the instruments may be positioned in the space on the shoulder of the backrest or on the side of the headrest or on both of the shoulder and the side because of the construction of the assembly that, when the box assembly is stored in the backrest, it may be interlocked with the tilting of the backrest and, when drawn out therefrom, may be freely moved, stopped, vertically and bilaterally rotated and stopped independently of tilting the backrest to thereby facilitate handling of the instruments and to save additional space for separate arrangement of instruments.

Growing community of inventors

Kyoto, Japan

Minoru Watanabe