US2712348A - Dental stool having a rotatable motor control support - Google Patents

Description

July 5, 1955 J. E. COOPER 2,712,348

DENTAL STOOL HAVING A ROTATABLE MOTOR CONTROL SUPPORT Filed March 22, 1954 l I III I 26 United States Patent 'Ofi 2,712,348 Patented July 5, 1955 ice DENTAL STOOL HAVING A ROTATABLE MOTOR CONTROL SUPPORT John E. Cooper, Los Angeles, Calif. Application March 22, 1954, Serial No. 417,709 7 Claims. (Cl. 155-134) This invention relates to a dental stool having a rotatable and retractable motor control support.

It is an object of my invention to provide a dental stool having a support which is adapted to hold the foot control for the dental motor, which support is adapted to rotate along with the seat of the stool, so that the actuating arms or levers of the motor control are always in the proper position adjacent the feet of the dentist.

It is a further object of my invention to provide a dental stool having a foot rest which is available at all times, regardless of the rotation or positioning of the seat providing a foot rest which extends around the entire base of the stool, thus always providing a support for the feet of the dentist, no matter how the seat is turned. It is a further object of this invention to improve on my earlier construction by providing a motor control support which is adapted to rotate along with the seat, so that it is always available at the feet of the dentist.

My invention also comprises such other objects, advantages and capabilities as will later more fully appear and which are inherently possessed by my invention.

While I have shown in the accompanying drawings a preferred embodiment of my invention, it should be understood that the same is susceptible of modification and change without departing from the spirit of my invention.

Referring to the drawings,

Fig. 1 is a side elevational view of my dental stool, with the motor control support shown in dotted lines;

Fig. 2 is a transverse sectional view of the same, taken on line 2 2 of Fig. 1;

Fig 3 is a vertical sectional view of my dental stool, taken on line 3-3 of Fig. 2, showing the motor control support in position for use;

Fig. 4 is an enlarged detailed sectional view showing the mounting of the shaft which holds the seat;

Fig. 5 is an enlarged detailed sectional view taken on line 55 of Fig. 1, showing the fastening means holding the motor control support in retracted position.

feet 11, of foot It is an object of this invention to improve on support 10. A fixed center shaft 12 is mounted by screw threading in a mounting base l3 in the center of foot H 19 to prevent any movement of ably mounted on a ball rotatably positioned on a end of stem 18 is support 10.

A two-piece mounting member 14 is positioned surrounding but not contacting center shaft 12 and is rotatbearing assembly 15, which is track 15a, which rests on the top of foot support 10. The bottom of a hollow standard 16 is mounted on an annular flange 14a which extends outwardly from mounting member 14. This assembly is best shown in Fig. 4 of the drawings. Its purpose is to permit standard 16 to be free to rotate with respect to foot support 10 without loosening center shaft 12.

A saddle shaped seat 17 is screw threadedly mounted on the upper end of a supporting stem 18. The lower movably mounted within center shaft 12. Stem 18 is provided with a plurality of annular grooves 19 which are spaced apart from each other to permit adjustment of the height of seat 17. A sleeve 20 surrounds the upper part of stem 18 within standard 16. A T-shaped height control rod 21 is screw threadedly mounted through the side of most forward position, its end is within one of the grooves stem 18 in order to set the height of seat 17.

A motor control support 21 is pivotally attached to a hinge 22, which extends from the outside of standard 16 in a circular path around the circumferential edge of foot support 10.

A small rod 26 having a round pin 27 at the end thereof is held out of the way, adjacent standard 16 as shown in dotted lines in Figs. 1 and 5 of the drawings.

In order to prevent removal of the seat assembly from standard 16, a bolt 29 is screw threadedly mounted hollow center portion thereof. A collar 30 is attached to center shaft 12. When bolt 29 is tightened, its shaft is positioned beneath collar 30. If seat 17 is lifted upwardly, standard 16 moves upwardly, carrying bolt 29 with it. The shaft of bolt 29, tom of collar 30, When bolt 29 is loosened, standard 16 may be removed from center shaft 12 by upward movement.

In use, the foot control for operation of the dental motor is placed on circular portion 23 of motor control support 21, with the wires extending through the opening in the end thereof. The height of seat 17 may be easily adjusted to any desired height in the manner set forth above.

My dental stool may be placed in adjacent the chair. When the a new position, he can move any desired position dentist desires to move to the entire dental stool on its casters, carrying with him to the new position foot support and motor control support 21. provided with a pommel 17a, which extends between the thighs of the dentist when he is seated on seat 17. When the dentist desires to turn to a new position, he need only move his thighs, contacting and exerting pressure on the side of pummel 17a to move seat 17 in either direction. The turning of seat 17 rotates standard 16 on ball. bearing assembly 15. Since motor control support 21 is attached to standard 16, it moves along with the body and feet of the dentist and is always in position for use, adjacent the feet of the dentist. Foot support 10, being flat and surrounding standard 16, is always available to support and rest the feet of the dentist.

When motor control support 21 is not necessary, it may be retracted out of the way, in the manner described above.

My dental stool thus provides complete flexibility of movement, since it may be disposed close to or far away from the chair, adjusted as to height, used with or without the motor control support and no matter how or Where the dentist moves, the foot support and motor controls are always available.

I' claim:

1. A dental stool comprising a plurality of caster-carrying feet mounted beneath and movably supporting said foot support, a standard extend ing uprightly from the center of said foot support and rotatably mounted with respect thereto, a seat adjustably mounted on the top of said standard, the rotation of said seat adapted to rotate said standard, a roller supported motor control support pivotally attached to said standard, said motor control support having a circular portion adapted to hold a foot operated motor control, a pin attached to said motor control support between said circular portion and said standard, a clamp mounted on said standard, said motor control support adapted to be pivoted to a non-use position adjacent said standard, said clamp adapted to grip said pin to hold said motor control support in non-use position adjacent said standard, said motor control support adapted when in use to be rotated on the top of said foot support by the rotation of said seat and standard.

2. The subject matter of claim 1, said seat having a pommel, said pommel adapted to be contacted by the a circular foot support,

thighs of the dentist to rotate said seat and motor control support in either direction.

3. A dental stool comprising a support, a standard extending uprightly from said support and rotatably mounted with respect thereto, a seat mounted on the top of said standard, the rotation of said seat adapted to rotate said standard, a motor control support attached to said standard, said motor control support adapted to hold a foot operated motor control, said motor control support rotating as said standard is rotated to be constantly available adjacent the feet of the person seated on the stool.

4. The subject matter of claim 3, said seat having'a pommel, said pommel adapted to be contacted by the thighs of the dentist to rotate said seat and motor control support in either direction.

5. A dental stool comprising a substantially circular foot support, a standard extending uprightly from the center of said foot support and rotatably mounted with respect thereto, a seat mounted on the top of. said standard, the rotation of said seat adapted to rotate said standard, a motor control support attached to said standard,

said motor control support adapted to hold. a foot operated motor control, said motor control support rotating on said foot support as said standard is rotated to be constantly available adjacent the feet of the person seated on the stool. 1

6. The subject matter of claim 5, said seat having a pommel, said pommel adapted to be contacted by the thighs of the dentist to rotate said seat and motor control support in either direction.

'7. The subject matter of claim 5, said motor control support being. pivotally attached by a horizontal pivot to said standard and being retractable to aposition adjacent said standard when not in use.

References Cited in the file of this patent UNITED STATES PATENTS

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