US3637050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental angle handpiece head
Assignee: Kaltenbach and Voigt GmbH
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Filing: 1970-03-11
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Granted: 1972-01-25
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Expires: 1990-03-11
Abstract
Abstract A dental angle handpiece head has a rotor shaft mounted in ball bearings which are lubricated through respective holes at opposite ends of the head, the holes opening externally and leading to annular spaces between the inner and outer races of the bearings. The holes have two portions of different diameter to form a step therebetween the outer hole portion being of larger diameter. The inner hole portion is inclined towards the axis of rotation of the rotor shaft in a direction away from the head and also in the direction of rotation of the shaft from the outside to the inside of the housing.
Inventors
- 👤 Erich Hoffmeister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:11
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/02; A61C1/05; A61C1/052; A61C1/08; A61C1/18; A61C1/181; F; F16; F16C; F16C19/00; F16C19/02; F16C19/04; F16C19/06; F16C2316/00; F16C2316/10; F16C2316/13; F16C33/00; F16C33/30; F16C33/66; F16C33/6603; F16C33/6622
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
A dental angle handpiece head comprising a housing; two ball bearings in said housing; and a rotor shaft mounted in said ball bearings and adapted for receiving a dental tool; said ball bearings each including spaced inner and outer races, said housing having opposite ends and being provided at each of said ends with at least one lubricating hole extending into communication with the space between the inner and outer races of a respective bearing, said housing having a central axis coincident with the shaft, each lubricating hole being offset from the central axis and inclined theretoward in a direction extending away from the housing, each lubricating hole also being inclined in said housing in the direction of rotation of the rotor shaft, each lubricating hole having a first portion of smaller diameter and a second portion of larger diameter to form a step therebetween, the smaller diameter portion extending towards the space between the races, only said smaller diameter portion being inclined.
Claim 2
Dependent Claim
163 words
A dental angle handpiece head comprising a housing; two ball bearings in said housing; and a rotor shaft mounted in said ball bearings and adapted for receiving a dental tool; said ball bearings each including spaced inner and outer races, said housing having opposite ends and being provided at each of said ends with at least one lubricating hole extending into communication with the space between the inner and outer races of a respective bearing, said housing having a central axis coincident with the shaft, each lubricating hole being offset from the central axis and inclined theretoward in a direction extending away from the housing, each lubricating hole also being inclined in said housing in the direction of rotation of the rotor shaft, each lubricating hole having a first portion of smaller diameter and a second portion of larger diameter to form a step therebetween, the smaller diameter portion extending towards the space between the races, only said smaller diameter portion being inclined.
Claim 3
Dependent Claim
55 words
A head as claimed in claim 1 wherein said housing is provided with a disc-shaped space at each of the ends thereof between said holes and the spaces between the races of the respective bearings, said housing having sidewalls bounding the disc-shaped spaces which are conical and narrow in a direction outwardly of the housing.
Claim 4
Dependent Claim
69 words
A head as claimed in claim 1 comprising distributor means for a spray medium at that one of the ends of the housing facing the tool, said distributor means being constituted by a distributor duct in said one end of the housing and spray nozzles in communication with said duct and opening externally of the housing, the lubricating hole in said one end being isolated from said distributor duct.
Claim 5
Dependent Claim
50 words
A head as claimed in claim 3 wherein said housing has a central axis coincident with said shaft and said distributor duct extends around said axis over an arc of between 200* and 300*, said duct having opposite ends between which the lubricating hole in said one end is located.
References Cited (Backward Citations)
US1982366A
Cited
US2263808A
Cited
US2605148A
Cited
US2706667A
Cited
US2872257A
Cited
US3112417A
Cited
US3426429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |