US3987549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental prophylactic handpiece
Assignee: Lawrence Peska Associates Inc
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Filing: 1975-10-06
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Granted: 1976-10-26
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Expires: 1995-10-06
Abstract
Abstract A dental prophylactic handpiece is provided with a drivable tool-receiving member having a square opening which is internally serrated. The tool-receiving member, at least in the region of the opening, is resilient so as to permit variation in the size of the opening. A dental tool is detachably connected in said tool-receiving member by means of an enlarged shank having a complementary externally contoured surface including peripherally extending serrations.
Inventors
- 👤 Paul Robertelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:24
CPC Classifications
A; A61; A61C; A61C3/00; A61C3/06; A61C17/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
191 words
A dental prophylactic handpiece comprising in combination: a hollow elongated housing having motor means mounted therein; a tool-receiving member mounted rotatably at one end thereof on said housing drivably connected to said motor means; a non-circular blind opening in the other end of said tool-receiving member, said tool-receiving member at least in the region thereof surrounding said opening being resilient and the inner surface of said opening being provided with circumferential serrations; and a dental tool detachably secured in said opening comprising a shank, a working tip integral with said shank located at one end thereof and an enlarged portion at the other end of said shank having an external surface of complementary configuration with the opening in said tool-receiving member including peripherally extending serrations thereon, the cross-sectional dimensions of said enlarged portion of the shank being greater than that of the corresponding dimensions of said opening, whereby insertion of said enlarged portion of said shank in said opening with the configurations of the opening and enlarged portion of the shank in aligned relation stresses said region of the tool-receiving member and effectuates a secure gripping of said dental tool therein.
Claim 2
Dependent Claim
191 words
A dental prophylactic handpiece comprising in combination: a hollow elongated housing having motor means mounted therein; a tool-receiving member mounted rotatably at one end thereof on said housing drivably connected to said motor means; a non-circular blind opening in the other end of said tool-receiving member, said tool-receiving member at least in the region thereof surrounding said opening being resilient and the inner surface of said opening being provided with circumferential serrations; and a dental tool detachably secured in said opening comprising a shank, a working tip integral with said shank located at one end thereof and an enlarged portion at the other end of said shank having an external surface of complementary configuration with the opening in said tool-receiving member including peripherally extending serrations thereon, the cross-sectional dimensions of said enlarged portion of the shank being greater than that of the corresponding dimensions of said opening, whereby insertion of said enlarged portion of said shank in said opening with the configurations of the opening and enlarged portion of the shank in aligned relation stresses said region of the tool-receiving member and effectuates a secure gripping of said dental tool therein.
Claim 3
Dependent Claim
23 words
A dental prophylactic handpiece according to claim 1, wherein said opening and said enlarged portion of said shank are given a square configuration.
Claim 4
Dependent Claim
35 words
A dental prophylactic handpiece according to claim 1, wherein the said working tip of said dental tool is an integral, flexible disc having a plurality of axially extending blind bores in the outer face thereof.
Claim 5
Dependent Claim
23 words
A dental prophylactic handpiece according to claim 1, wherein the said working tip of said dental tool is an integral flexible conical element.
Claim 6
Dependent Claim
24 words
A dental prophylactic handpiece according to claim 1, wherein the axis of said shank is coaxial with the drive shaft of said motor means.
Claim 7
Dependent Claim
18 words
A dental prophylactic handpiece according to claim 1, wherein said tool-receiving member is formed with a conical configuration.
References Cited (Backward Citations)
US2403136A
Cited
US2965383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |