US2503156A

US2503156A - Amalgam carrier and applicator

Info

Publication number: US2503156A
Application number: US46271A
Authority: US
Inventors: Chester S Ivory
Original assignee: ESTATE OF J W IVORY
Current assignee: ESTATE OF J W IVORY
Priority date: 1948-08-26
Filing date: 1948-08-26
Publication date: 1950-04-04
Anticipated expiration: 1967-04-04

Description

A ril 4, 1950 cps. IVORY AMALGAM CARRIER AND APPLICATOR Filed Aug. 26, 1948 Cat-$750 5. l/oe Y I N V EN TOR.

Patented Apr. 4, 1950 A'MA'LGrAM CARRIER AND APPLICATOR Chester S. Ivory, Bala-Cynwyd, Pa., assignor to The Estate of J. W. Ivory, Philadelphia, Pa.

Application August 26, 1948, Serial No. 46,271

1 Claim. 1

My invention relates to an amalgam carrier and applicator of the type disclosed in my prior Patent No. 1,797,866, of March 24, 1931, entitled Amalgam carrier.

One object of the invention is to produce an improved instrument of the type set forth.

Because it is used primarily when work is to be done on relatively inaccessible teeth, the carrier is, necessarily of a complicated shape and because it is used in the mouth it is necessarily small and delicate. The complicated shape and the limitation on size and weight make it impractical to case these instruments and if they are to be produced by stamping and bending operations relatively thin and malleable sheet metal must be used. This produces a satisfactory instrument except that the reduced end of the instrument which supports the amalgam carrier will not be as strong as it is desirable for it to be.

It is therefore afurther object of the invention to produce an instrument of the type set forth the reduced end of which will be stronger than heretofore better to support the tubular amalgam containing member without the use of heavier metal.

Also, since the amalgam containing tubular member is suspended from the remote end of the instrument, and must be held in alignment with a small cavity in a relatively inaccessible tooth,

it is desirable to prevent wobbling of the tubular member relative to the instrument.

It is therefore a further object of the invention to produce an improved construction whereby the tubular member is held relatively rigidly with reference to the end of the instrument from which it is suspended.

These and other objects are attained by my invention as set forth in the following specification and as illustrated in the accompanying drawing in which:

Fig. 1 is a side elevational view of an amalgam carrier and application embodying my invention.

Fig. 2 is a top plan view of Fig. 1.

Fig. 3 is a section on line 3-3 on Fig. 2.

Figs. 4 and 5 are side elevational views showing the manner in which the instrument is used.

The instrument illustrated includes a handle III, a first intermediate portion l2, a second intermediate portion l4 and a terminal portion IS. The instrument is so bent that, when the terminal portion I6 is held in a horizontal position, the portions l0, l2 and M will incline downwardly toward the terminal portion [6, as shown in Fig. 1. The portion I2 is provided with an opening l8 which will be hereinafter referred to and the terminal portion I6 is provided with a central enlarged opening 20 which communicates with reduced

end openings

22 and 22 for receiving and engaging a tubular member 24 adapted to contain amalgam. The tubular member 24 is provided with upper and lower spaced flanges 26 and 21 which are small enough to pass through large round opening 20 but are too big to pass thru the end openings 22 and 22'.

According to my invention, the terminal portion [6 is produced by bending an initially longer blank back upon its self to form a lower terminal portion 28 which underlies the part of the portion I6 which is to the left of the opening 20 as viewed in Figs. 1 and 2. The member 28 is provided with an opening which is similar to, and which underlies the opening 22.

The inner end of the member 28 is slotted and the member 28 itself is spaced from the terminal portion lBso that, when the tubular member 24 is in position, the upper flange 26 will bear against the upper surface of the terminal portion l 6 and the flange 2'! will be held between the

terminal portions

16 and 28. In this position, the portion of the tubular member 24 which is between the flanges will be engaged by the side walls of the openings in the terminal portions l6 and 28.

In use, the tubular member 24 is loaded with amalgam and inserted through the round opening 20 and into either of the

openings

22 or 22. Usually, however, the member 24 is pushed toward the end of the instrument so as to engage the opening 22 and the opening in the member 28 therebelow. When the member 24 has been brought into alignment with the cavity to be filled, the amalgam is pushed into the cavity 32 as shown at 34 in Fig. 5. For convenience, the pusher shown in Figs. 4 and 5 is used. This pusher is shown and described in my prior patent aforesaid and need not be now described in detail. It is sufficient to point out that the pusher includes a handle 36 and a reduced end portion 38 which is bent at 39 to provide a pendent ram 40 which is adapted to enter the tubular member 24 and expell the amalgam from the tubular member 24 into the cavity. The handle is provided with a reduced portion 44 which is adapted to engage the opening I8 so as to provide a rocking motion between the pusher and the instrument of Fig. 1.

It will be seen that by constructing the end portion of the carrier as herein shown, the remote reduced end of the carrier is reinforced and the tubular member 24 is given more adequate bearing.

What I claim is:

An amalgam carrier and applicator including an open ended tubular member having an enlarged head near one end thereof and a flange parallel to and disposed inwardly from said head, and a handle having a flat, reduced, relatively thin end portion adapted to engage said tubular member, said end portion being bent back upon itself to provide closely adjacent upper and lower sections, there being registering openings in said sections for allowing the passage of said tubular member therethrough, said openings being small enough to prevent passage of said enlarged head therethrough, whereby said upper section engages the underside of said head and said lower section engages the corresponding side of said flange. CHESTER S. IVORY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Ivory Mar. 24, 1931