US1783654A - Dental instrument - Google Patents

Description

Dec. 2, 1930. w. A. KELsr-:Y 1,783,654

DENTAL INSTRUMENT Filed oct. 1o, 1927 5 P1 5 la /0 Z. l5 'Z0 mul ZNVENTOR WML/,4M A Kasey Patented Dec. 2, 1930 WILLIAM A. KnLsEx-'or MINNEAPOLIS, MINNESOTA i v1,783,654 l OFFICE VDENTAL'INS'IRUMENT Appncanonmed october 1o, 1927. serial No. 225,358.

This invention relates to new and useful improvements in dental instruments, and particularlyf` to such instruments 'comprising a handlepor-tion having a tool demountably re- 5 ceived -in one end thereof, and, of theclass generally used in the dental profession for scraping andcleaningteeth, preparing cavi'-V lo A A n object of theinvention is to provide a dental instrument comprising an elongated body providing a iingerlgripffor the instrument and having asocket at `one lendthereof adapted to receivethe shank; ofV a tool, and astem 'being received in threaded engagement with the opposite end of thebody and co-operating therewithn to providethe handle for the instrument, and a locking memberbeing pivotally mounted in said body andhaving one end adapted: to be engaged by theterminal of Vsaidlocking screw where- 'bytheV lockingv member maybe moved into locking engagement with lthe tool shank, to secureitto'the body. r` Y- Y A further obj ect of vthelinvention is to provi'de a dental instrument-comprising a'body 'having a* tool-receiving socket provided in `one end 'thereof-and' arranged at a slight angle with respect to the axis of the body, `and am locking screw being received in threaded engagement `with the opposite end ties, Carving wax forms, and various similar offthe body and (1ooperating therewith to fprovidefa handle fortheinstrument, V and a plate-like locking member `being mounted within said body and having one end arlranged to be' engaged by said locking screw,

the opposite endof said locking member havli110` means for en a ino' andofri pin atool Shnk, when the inegmia 'is ceiafedgby the locking screw, and said lockingmember also lhavingan inclined face adapted to engage the end'of the tool shankv and translate' it in an outward direction to partiallyremove'it from the body, whensaid llocking screw has been moved outof1 engagement with the locking member, and the latter is actuated.`

A further, object is to provide adental instrument of the class frdescribed comprising a handle portion having means for demountably receiving a dental' tool, saidinstrument Vbeing provided witha` simple and eiiicient locking means for securing the tool shank Vin said handle portion, said locking means Y being conveniently operable, whereby a tool may be quickly removed from the handle and another one substituted therefor.

The particular object of the invention, therefore, is to provide an improved dental instrument of the cla-ss described.

- Other objects of the invention will appear so from the following description and accompanying drawings and vvillv be pointed out in i the annexed claims. In the accompanying drawings, there has been disclosed a structure designed to carry 365 di out the various objects of the invention, but itis tobe understood that the invention is not coninedj to the exact features shown as various changes may be made within the scope of the claim which follow. f im In the accompanying Vdrawings for-ming part of this specification:

Figure lis a longitudinal sectional view ofthe improved instrument showin@n the locking member engaged with a tool shankto r1.5 lock the latter to the body; i Y I Figure 2 is a similar view, sligh ly enlargecl, showing the locking member in unllocking position and further showinothe b .L 7 b means provided thereon for translating the so shank of the tool in an outward direction to remove it from the body; Y

`Figure `Sis a cross sectional view on the line of Figure l; i l Figure 4 is a cross-sectional View on the 85 line 4-4 of Figure v1;"and g FigureV 5 is a View showing the tool`re- Y moved from the body.

rl`henovel dental instrument featured in this invention comprisesan elongated body 2, having a socket 3 provided at one end thereof adapted to receive the shank 4 of a tool 5, as shown.'v The axis Vof the socket 3 is preferablyarranged at an angle with respect to the axis ofl theV body 2 andis also 95 off-set therefrom as indicated by the dotted `lines a-a and b-b. Anotch 6 is terminally provided in the body 2 adapted to receive a tongueor attened portion 7 provided upon; the shank l :of the tool. Whenthe l100 notch 6 and tongue 7 are interlocked, the tool shank will be prevented from turning or rotating in the socket 3.

The means provided for securing the tool shank in the socket 3 consists of a locking member 8 mounted in an elongated recess 9, provided in the body 2. The locking member 8 is pivotally mounted upon a pin 10 as shown. A detent 11 is provided at one end of the locking member 8 and is adapted to be received in a notch 12 provided in the tool shank as shown, particularly in Figures 2 and 5. An inclined face 13 is also provided in the locking member 8 adjacent to the detent 11. This inclined face is adapted to engage a beveled face 14 provided at the end of the -tool shank 4. The purpose of the beveled faces 13 and 14C is to provide means for translating the tool shank in an outward direction in the socket 3, when the locking member is moved into unlocking position, as shown in Figure 2.

A locking screw 15 is received in a threaded socket 16 provided at the opposite end of the body and has a cone-shaped terminal 17 adapted to engage the inclined face 13 of the locking member, as shown in Figure 1. The axis of the socket 1G is also oit-set from the axis of the body 2 in the same direction as the axis of the tool-receiving socket 3. The locking screw has a stem 19 which co-operates with the body 2 to provide the handle for the instrument. A knurled head 2() is provided at the outer end of the stem 19 to provide means for conveniently rotating the screw 15 to move the terminal 17 into and out of locking engagement with the inclined face 13 of the locking member 3.

In the operation of this novel instrument, the shank 4 of the tool is inserted into thc socket 3 until the tongue 7 is received in the notch 6 provided at the end of the body. The pivotal mounting ot the locking member S within the recess 9 is such that when the tool shank is inserted into the socket 3, the beveled face 14 thereof, will engage the beveled face 13 of the locking member and cause the latter to be moved into locking position substantially as shown in Figure 1, when the tool shank reaches the position shown in this iig ure. The locking screw 15 is then rotated to move the terminal 17 into engagement with the inclined face or edge 18 oi'nthe locking member, thereby causing the locking member to securely grip the tool shank and thus secure it to the body portion 2 ot the handle. Then it is desir-ed to remove the tool shank from the socket 3 for the purpose of changing tools, and so on, the locking screw 15 is translated outwardly substantially to the position shown in Figure 2, after Vwhich the locking member 3 may be oscillated upon the pin 10A by applying a slight pressure thereto at the pointindicated at P, thus causing the inclined face'13`of the latch member to move the tool shank outwardly to the position shown in Figure 2, after which it may readily be withdrawn from the socket and a new tool inserted therein. One edge of the lock ing member 8 preferably extends beyond the periphery of the body 2, so that pressure may be applied thereto at the point I), when it is desired to remove the tool shank from the socket 3. The sockets 3 and 16 are preferably offset from the axis of the body 2, as hereinbefore stated, so that when the instrument is in use and pressure is brought to bear on the body 2 at the point indicated at P1, there will be no tendency for the instrument to turn or rotate in the operators hand.

I claim as my invention:

1. In a dental instrument, the combination of an elongated body shaped to provide a inger grip for the instrument, a tool-receiving socket in one end of said body having its axis disposed at an angle with respect to the axis of said body to prevent relative rotation of the instrument when held in the hand of an operator and lateral pressure is brought to bear thereon, a threaded socket in the opposite end of said body adapted to receive a locking screw, and a locking member mounted in said body and adapted to be engaged by said locking screw whereby said locking member may be moved into locking engagement with the tool shank to secure it to said body.

2. In a dental instrument, the combination of an elongated body shaped to provide a nger grip for the instrument, a'tool-receiving socket in one end of said body arranged at an angle with respect to the axis of the body to prevent relative rotation of the instrument when heldin the hand of an operator and lateral pressure is brought to bear thereon, a threaded socket in the opposite end of said body having a locking screw adjustably mounted therein, and a locking member mounted on said body and having one end arranged to engage and grip a tool shank inserted in said tool-receiving socket, and the opposite end ofV said locking member being adapted to be engaged by said locking screw to cause the member to secure the tool shank in said body.

3. In a dental instrument, the combination of a body forming a linger grip Jfor the instrument, a tool-receiving socket in one end of said body arranged at an angle with respect to the axis thereof to prevent relative rotation of the instrument when held in the hand of an operator and lateral pressure is brought to bear thereon, a locking screw received in threaded engagement with the opposite end of Vsaid body, a recess in one side .of said body, and a plate-like locking member or latch pivotally mounted within said recess and having one end adapted' to engage a tool shank to lock the latter to said body said locking member having its opposite end adapted to be 'engaged by'said locking screw, whereby said locking member may be moved into locking engagement with the tool shank.

4f. In a dental instrument, the combination of a body forming a linger grip for the instrument, a tool-receivingV socket in one end of said'body arranged at an angle withrespect to the axis thereof to prevent relative rotation of the instrument when held in the hand of an operator and lateral pressure isbrought to bear thereon, a locking screw received in threaded engagement with the opposite end ofsaid body, a recess in one side of said body extending substantially the length thereof, and a plate-like locking memi ber or latch pivotally mounted within said recess and having one end adapted to engage and grip a tool shank to lock the latter to said body, said lockingmember having its opposite end adapted to be engaged by said locking screw, whereby thelocking member may n be oscillated to grip the tool shank.

5. In a dental instrument, the combination of a body having a socket terminally pro vided at one end thereof and adapted to receive a tool shank, a threaded socket at the opposite end of the body adapted to receive a locking screw, the stem of which co-operates with said body to provide a handle for the,

instrument, a locking member pivotally mounted within said body and having one end adapted to be engaged by said locking screw, andthe opposite end of said locking member having means thereon adapted to engage and grip a tool shank inserted in said tool-receivingY socket, said locking member also having a face adapted to engage the end of said tool shank and move it in an outward direction, when said locking screw is moved out of engagement with said locking mem! ber, and pressure is applied to the opposite end of the member.

6. In a dental instrument,the combination of a body having a socket terminally provided at one end thereof, adapted to receive a tool shank, a threaded socket at the opposite end of the body adapted to receive a lockingl screw, the stem of which co-operates with said body to provide a handle for the instrument, a locking member pivotally mounted within said body and having one end adapted to be engaged by said locking screw, and the op# posite end of said locking member having means thereon adapted to engage and grip a tool shank inserted in said tool-receiving socket, said means preventing withdrawal of the tool shank from the body when the locking member is in locking position, said locking member also having means thereon for translating the tool shank in an outward direction when said lockingv screw is movedf out of engagement with said locking member. In witness whereof, I have hereunto set my hand this 5th day ofOctober, 1927.

WILLIAM A. KELSE-Y.

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