US2363141A

US2363141A - Dental hand piece

Info

Publication number: US2363141A
Application number: US477417A
Authority: US
Inventors: Ernest R Pertics
Original assignee: Individual
Current assignee: Individual
Priority date: 1943-02-27
Filing date: 1943-02-27
Publication date: 1944-11-21
Anticipated expiration: 1961-11-21

Description

Nov. 21, 1944. E. R PERTICS 2,363,141

DENTAL HAND PIECE Filed Feb. 27,.1945 2 Sheets-Sheet l )2 Q a s; 72 PerZz'GS ikcoouxva v I g j K B Inventor Nov. 21, 1944. E. R. PERTICS 2,363,141

DENTAL HAND PIE CE Filed Feb. 27, 1943 2 Sheets-Sheet 2 J l i Inven tor WWW 19m Patented M 1, 1944 2,363,141 DENTAL HAND PIECE Ernest R. Per-tics, Lapel, Ina. Application February 27,. 1943, Serial No. 477,417

The present invention relates to new and useful improvements in dental hand pieces, and has for its primary object to provide, in a manner, as hereinafter set forth, an instrument of this character comprisingnovel cooling-means, thus promoting patient comfort and consequently facili- It is thought that the operation of the device tating and expediting the work of the operator.

Other objects of the invention are to provide a dental hand piece of. the aforementioned char acter which will be comparatively simple in construction, strong, durable, highly efficient and reliable in use, compact, light in weight, and,

which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection withthe accompanying c the shaft 6 in the tubular handle -4. The 'refrigerant from the unit l2, circulating through the 1 Claim. (01. 32-28) 9 receives a refrigerant from a suitable cooling unit 12. As shown in Figures .1 and 3,'the coil 9 has inlet and outlet pipes l3 and I4, and the unit.

12 has inlet and outlet pipes l5 and I6, respectively connected by a flexibleyconduit I! provided with supply and return passages.

will be readily apparent from a consideration of the foregoing. Briefly, heat from the work, such as a tooth,is transmitted through the tool8 to coil 9, rapidly absorbs the heat, thereby maintaining the tooth at a cornfortabletemperature. It is believed that the many advantages of a dental hand piece constructed in accordance with thepresent invention will be readily understood,

drawings, wherein like characters of reference 1 designate corresponding parts throughout the several views, and wherein:

Figure 1 is a view in side elevation of an embodiment of the apparatus.

Figure 2 is a view in side elevation of the hand.

piece with the upper portion thereof broken away.

Figure 3 is a vertical sectionalviewthro ugh the hand piece,taken substantially on the line 3-3 of Figure 2.

Figure 4 is a View in horizontal section, taken substantially on the line 44of Figure 2,

Referring now to. the drawings in detail, it will be seen that reference numeral l designates generally a conventional dental engine or unit comprising the usual folding arm 2. Mounted on the arm 2 is a hand piece..3.

The hand piece 3 includes a tubular handle 4 i of suitable metal having therein a lining 5 of insulating material. the tubular handle 4 is a shaft 6. Achuck I on one end of the shaft 6 accommodates a dental drill or other tool; 8.

Mounted longitudinally m the tubular handle 4 is a coil 9 which encircles theshaft 6. The tubular handle 4 hasformed therein a longitudinal, internal channel H! which accommodates the vapor return lead ll of the coil 9. c The coil Journaled longitudinally in hand piece and having refrigerant inlet and outand although a preferred embodiment of the instrument is as illustrated and described, it is to be understood that changes in the details of construction maybe resorted to which will fall within the scope of the invention as claimed.

What is claimed is:

lining, a shaft journaled longitudinally in and projecting beyond one-end of said handle, said shaft being disposed axially of and spaced from the handle to provide a cylindrical chamber therebetween, and means for securing a tool on the projecting end of the-shaft, a coil for the passage of a refrigerant mounted longitudinally in said chamber of the handle and encircling the shaft,'said coil having refrigerant inlet and outlet ends passing out of the other end of the i handle andbeing provided with a straight return lead extending longitudinallyof the handle outwardly of said coil, said handle having an internal longitudinal channel in which said return lead is positioned, a cooling unit remote from the let pipes, and flexible; conduit connections .be-

tween the inlets and outlets of the coil and the h H c i cooling unit.

In combination with a dental hand piece including a tubular handle having an insulating ERNEST R. PERTICS, h