GB175240A - Improvements in dental drill-heads - Google Patents

Improvements in dental drill-heads

Info

Publication number
GB175240A
GB175240A GB25162/21A GB2516221A GB175240A GB 175240 A GB175240 A GB 175240A GB 25162/21 A GB25162/21 A GB 25162/21A GB 2516221 A GB2516221 A GB 2516221A GB 175240 A GB175240 A GB 175240A
Authority
GB
United Kingdom
Prior art keywords
gear
cover
aperture
closed
retained
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
Application number
GB25162/21A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ALWIN BERGER
Original Assignee
ALWIN BERGER
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ALWIN BERGER filed Critical ALWIN BERGER
Publication of GB175240A publication Critical patent/GB175240A/en
Expired legal-status Critical Current

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
    • A61C1/08—Machine parts specially adapted for dentistry
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2186—Gear casings

Abstract

175,240. Berger, A. [Firm of]. Feb. 5, 1921, [Convention date]. Driving machines. -To prevent access of swarf &c. to the bevel driving-gear of dental drills, open lubrication holes are omitted and a comparatively large aperture is provided in the gear case to permit ready examination of the gearing, the aperture being closed by a fitted cover while the gear is in use. Fig. 2 shows a hinged spring cover b adapted to close the aperture in the gear casing a. A thumb-nail notch is provided for lifting the cover. In a modification the cover takes the form of a sliding plate which may be retained in the closed position by friction or by a spring stop. In a further modification the aperture is closed by a fitted cover f, Fig. 5, retained in place by screws g. The Specification as open to inspection under Sect. 91 (3) (a) described the application of the invention to bevel-gear casings generally. This subject-matter does not appear in the Specification as accepted.
GB25162/21A 1921-02-05 1921-09-22 Improvements in dental drill-heads Expired GB175240A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1590681X 1921-02-05

Publications (1)

Publication Number Publication Date
GB175240A true GB175240A (en) 1922-09-14

Family

ID=7736633

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25162/21A Expired GB175240A (en) 1921-02-05 1921-09-22 Improvements in dental drill-heads

Country Status (3)

Country Link
US (1) US1590681A (en)
DE (1) DE344750C (en)
GB (1) GB175240A (en)

Also Published As

Publication number Publication date
DE344750C (en)
US1590681A (en) 1926-06-29

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