Patent US3946490A successfully refreshed from Google Patents.
US3946490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubrication system for dental handpiece
Assignee: DEN-TAL-EZ DENTAL PRODUCTS CORP A CORP OF PA
•
Filing: 1974-03-27
•
Granted: 1976-03-30
•
Expires: 1994-03-27
Abstract
Abstract An air driven dental handpiece comprising a handle and a turbine housing mounted at one end thereof. The turbine housing includes a rotor having rotor blades and ball bearings for rotatably mounting the rotor. A port is formed in the handle, which is in fluid communication with the interior of the turbine housing. A lubricant is injected into the turbine housing through the port. Removable sealing means cover the port to prevent any foreign matter from entering the turbine housing and to prevent air from leaving the port.
Inventors
- 👤 Kurt Sotman
- 👤 Richard P. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:09
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/08; A61C1/18; A61C1/181; A61C1/02; A61C1/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
129 words
A dental handpiece comprising a handle and a turbine housing mounted on one end thereof, a rotor mounted within said turbine housing, said rotor being rotatably mounted in bearings, said bearings comprising upper and lower bearings, with said rotor being mounted between said upper and lower bearings, a port formed in said handle, said port being in fluid communication with the interior of said turbine housing, said port comprising a channel formed in said handpiece, said channel having an opening in said turbine housing, said opening being positioned between said upper and lower bearings, and a collar secured on said handle and slidable relative thereto, said collar being adapted to cover said port, whereby a lubricant can be injected through said port into the interior of said turbine housing.
Claim 2
Dependent Claim
129 words
A dental handpiece comprising a handle and a turbine housing mounted on one end thereof, a rotor mounted within said turbine housing, said rotor being rotatably mounted in bearings, said bearings comprising upper and lower bearings, with said rotor being mounted between said upper and lower bearings, a port formed in said handle, said port being in fluid communication with the interior of said turbine housing, said port comprising a channel formed in said handpiece, said channel having an opening in said turbine housing, said opening being positioned between said upper and lower bearings, and a collar secured on said handle and slidable relative thereto, said collar being adapted to cover said port, whereby a lubricant can be injected through said port into the interior of said turbine housing.
Claim 3
Dependent Claim
112 words
A dental handpiece comprising a handle and a turbine housing mounted on one end thereof, a rotor mounted within said turbine housing, said rotor being rotatably mounted in ball bearings, said turbine housing having upper and lower openings, a port in said handle, said port being in fluid communication with the interior of said turbine housing, and a collar secured on said handle and slidable relative thereto, said collar being adapted to cover said port, whereby a lubricant can be injected through said port into the interior of said turbine housing, and whereby said injected lubricant is propelled through said ball bearings and through said openings when said rotor is air actuated.
Claim 4
Dependent Claim
112 words
A dental handpiece comprising a handle and a turbine housing mounted on one end thereof, a rotor mounted within said turbine housing, said rotor being rotatably mounted in ball bearings, said turbine housing having upper and lower openings, a port in said handle, said port being in fluid communication with the interior of said turbine housing, and a collar secured on said handle and slidable relative thereto, said collar being adapted to cover said port, whereby a lubricant can be injected through said port into the interior of said turbine housing, and whereby said injected lubricant is propelled through said ball bearings and through said openings when said rotor is air actuated.
References Cited (Backward Citations)
US2090885A
Cited
US2591129A
Cited
US2724858A
Cited
US2841244A
Cited
US3298103A
Cited
US3069775A
Cited
US3052984A
Cited
US3195965A
Cited
US3311429A
Cited
US3542442A
Cited
US3637050A
Cited
US3624905A
Cited
US3720290A
Cited
US3879851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |