GB710795A - Improvements in or relating to dental engines - Google Patents
Improvements in or relating to dental enginesInfo
- Publication number
- GB710795A GB710795A GB2249/52A GB224952A GB710795A GB 710795 A GB710795 A GB 710795A GB 2249/52 A GB2249/52 A GB 2249/52A GB 224952 A GB224952 A GB 224952A GB 710795 A GB710795 A GB 710795A
- Authority
- GB
- United Kingdom
- Prior art keywords
- burr
- handpiece
- turbine
- shaft
- valve opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/02—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools
- A61C1/05—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools with turbine drive
Landscapes
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
710,795. Turbines. NORLEN, P. I. Jan. 28, 1952 [April 10, 1951], No. 2249/52. Class 110(3) [Also in Group VI] A turbine for operating a dental handpiece is rotated by a pressure medium, such as compressed air, supplied through a flexible hose, and is arranged on a shaft so that a rotary motion is transmitted to a burr in the handpiece, the pressure medium being regulated by a manually operable member arranged between the burr and the turbine casing, the pressure medium passing to the turbine casing through a valve so that it flows through the turbine in a direction away from the burr. A turbine wheel 2 is fixed on a shaft 3 connected by a claw coupling 8, 9 with a handpiece shaft 10. Compressed air entering a portion 12 of the turbine casing through a nozzle 17 passes through a valve opening 22 controlled by a rubber sealing member 23 which is held against a cylindrical valve body 19 by a ring 24. The rubber sealing member 23 normally closes the valve opening 22. the valve body 19 being pressed forwardly by a helical spring 21. A partition 13 is provided in the turbine casing and is provided with conical nozzles 14 through which air which, has passed through the valve opening 22 is conveyed to the turbine wheel 2. a sound absorber 74 being provided. The burr end of the handpiece shaft 10 is screwed into the reat end of a burr fixing sleeve 38, which rear end 39 is square in cross-section. A control key 40 of a bellcrank projects entirely or partially from the outer sleeve 33 of the handpiece and 'regulates the 'valve opening 22 and consequently the speed of rotation of the turbine wheel 2. On depression of the control key 40 a forked arm 42 of the bellcrank bears against a sleeve 43 which surrounds the handpiece shaft 10 and presses it rearwardly so that two parallel pins 44, attached to the rear end of the sleeve 43. press against a sealing diaphragm 29 which, in turn moves a valve nut 20 and the valve body 19 rearwardly thus opening the valve opening 22 against the closing action of the helical spring 21. A burr is secured in the handpiece when the control key 40 has been swung upwardly so that the forked arm 42 engages the rear portion 39 of the burr fixing sleeve 38, fixing of the burr being accomplished by turning a button 6, Fig. 1, at the rear end of the turbine shaft 3.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE710795X | 1951-04-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB710795A true GB710795A (en) | 1954-06-16 |
Family
ID=20315724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2249/52A Expired GB710795A (en) | 1951-04-10 | 1952-01-28 | Improvements in or relating to dental engines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB710795A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2000457A (en) * | 1977-07-04 | 1979-01-10 | Morita Mfg | Cartridge-type chuck for use in dental hand-piece |
-
1952
- 1952-01-28 GB GB2249/52A patent/GB710795A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2000457A (en) * | 1977-07-04 | 1979-01-10 | Morita Mfg | Cartridge-type chuck for use in dental hand-piece |
GB2000457B (en) * | 1977-07-04 | 1982-01-20 | Morita Mfg | Cartridge-type chuck for use in dental hand-piece |
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