US3713221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Root canal instrument
Assignee: Individual
•
Filing: 1971-06-09
•
Granted: 1973-01-30
•
Expires: 1991-06-09
Abstract
Abstract A dental instrument for root canal preparation including a hollow plastic sleeve having opposed open ends and an enlarged central area which can receive the head of a conventional reamer while its cutting end projects from one of the open ends thereof. The sleeve also has a series of gradations in the form of circumferential grooves on its outer surface to enable it to be accurately cut off to any desired length. The sleeve is also adapted to be used with a variety of handles including an axially extending handle for anterior use and a right angle handle for posterior use.
Inventors
- 👤 O Malmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:41
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/02; A61C1/04; A61C5/00; A61C5/40; A61C5/42; A61C5/44
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
130 words
A dental tool of the character described, comprising; A. a hollow elongate resilient sleeve having a first end and a second end with an enlarged central opening; B. an instrument having 1. a head 2. a cutting end and 3. a shank interconnecting said head and said cutting end 4. with said instrument being adapted to be seated within said sleeve with said cutting end projecting from said first end thereof and said head being received in said enlarged opening of said second end and interlocking with said sleeve; C. a series of indicia carried on the external surface of said sleeve whereby said sleeve may be severed at a predetermined point to achieve a desired length; and D. handle means adapted to engage said second end of said sleeve.
Claim 2
Dependent Claim
130 words
A dental tool of the character described, comprising; A. a hollow elongate resilient sleeve having a first end and a second end with an enlarged central opening; B. an instrument having 1. a head 2. a cutting end and 3. a shank interconnecting said head and said cutting end 4. with said instrument being adapted to be seated within said sleeve with said cutting end projecting from said first end thereof and said head being received in said enlarged opening of said second end and interlocking with said sleeve; C. a series of indicia carried on the external surface of said sleeve whereby said sleeve may be severed at a predetermined point to achieve a desired length; and D. handle means adapted to engage said second end of said sleeve.
Claim 3
Dependent Claim
31 words
A dental tool of the character described, comprising; A. a hollow elongate resilient sleeve having a first end and a second end with an enlarged central opening; B. an instrument having
Claim 4
Dependent Claim
31 words
A dental tool of the character described, comprising; A. a hollow elongate resilient sleeve having a first end and a second end with an enlarged central opening; B. an instrument having
Claim 5
Dependent Claim
2 words
a head
Claim 6
Dependent Claim
2 words
a head
Claim 7
Dependent Claim
15 words
an enlarged central cavity adapted to receive the head of said tool and interlock therewith
Claim 8
Dependent Claim
15 words
an enlarged central cavity adapted to receive the head of said tool and interlock therewith
Claim 9
Dependent Claim
7 words
adapted to releasably engage said cap member.
Claim 10
Dependent Claim
7 words
adapted to releasably engage said cap member.
Claim 11
Dependent Claim
23 words
adapted to be partially received in said second end of said sleeve and engage said head of said instrument; and D. a handle
Claim 12
Dependent Claim
23 words
adapted to be partially received in said second end of said sleeve and engage said head of said instrument; and D. a handle
Claim 13
Dependent Claim
2 words
a head
Claim 14
Dependent Claim
2 words
a head
Claim 15
Dependent Claim
5 words
first and second ends and
Claim 16
Dependent Claim
5 words
first and second ends and
Claim 17
Dependent Claim
34 words
whereby said handle means may engage said sleeve; and C. said handle means having a projecting lip insertable in said second end of said sleeve and adapted to engage said head of said instrument.
Claim 18
Dependent Claim
34 words
whereby said handle means may engage said sleeve; and C. said handle means having a projecting lip insertable in said second end of said sleeve and adapted to engage said head of said instrument.
Claim 19
Dependent Claim
14 words
whereby said handle means may engage said sleeve and said head of said instrument.
Claim 20
Dependent Claim
14 words
whereby said handle means may engage said sleeve and said head of said instrument.
Claim 21
Dependent Claim
30 words
The device of claim 1 further characterized by the fact that said indicia on said sleeve are in the form of circumferential slits whereby said sleeve may be accurately shortened.
Claim 22
Dependent Claim
4 words
a cutting end and
Claim 23
Dependent Claim
4 words
a cutting end and
Claim 24
Dependent Claim
13 words
a plurality of annular grooves in its peripheral surface; B. an instrument having
Claim 25
Dependent Claim
13 words
a plurality of annular grooves in its peripheral surface; B. an instrument having
Claim 26
Dependent Claim
18 words
a through bore communicating with said central cavity and adapted to receive the shank of said tool and
Claim 27
Dependent Claim
18 words
a through bore communicating with said central cavity and adapted to receive the shank of said tool and
Claim 28
Dependent Claim
4 words
a cutting end and
Claim 29
Dependent Claim
4 words
a cutting end and
Claim 30
Dependent Claim
9 words
a shank interconnecting said head and said cutting end
Claim 31
Dependent Claim
9 words
a shank interconnecting said head and said cutting end
Claim 32
Dependent Claim
29 words
means for controlling the distance from the end of said sleeve to the cutting end of said tool whereby said sleeve may be accurately shortened to a predetermined length.
Claim 33
Dependent Claim
29 words
means for controlling the distance from the end of said sleeve to the cutting end of said tool whereby said sleeve may be accurately shortened to a predetermined length.
Claim 34
Dependent Claim
9 words
a shank interconnecting said cutting end and said head,
Claim 35
Dependent Claim
9 words
a shank interconnecting said cutting end and said head,
Claim 36
Dependent Claim
34 words
The device of claim 1 further characterized by the fact that A. said sleeve has an inwardly extending rib disposed adjacent said second end; and B. said handle means having a complemental groove thereon
Claim 37
Dependent Claim
32 words
The device of claim 1 further characterized by the fact that A. said sleeve has a circumferential groove on its external surface; B. said handle means having a radially extending flange thereon
Claim 38
Dependent Claim
80 words
with said instrument being adapted to be seated within said sleeve with said cutting end projecting from said first end thereof and said head being received in said enlarged opening of said second end and interlocking with said sleeve; C. a series of indicia carried on the external surface of said sleeve whereby said sleeve may be severed at a predetermined point to achieve a desired length; and D. handle means adapted to engage said second end of said sleeve.
Claim 39
Dependent Claim
80 words
with said instrument being adapted to be seated within said sleeve with said cutting end projecting from said first end thereof and said head being received in said enlarged opening of said second end and interlocking with said sleeve; C. a series of indicia carried on the external surface of said sleeve whereby said sleeve may be severed at a predetermined point to achieve a desired length; and D. handle means adapted to engage said second end of said sleeve.
Claim 40
Dependent Claim
24 words
with said instrument being adapted to seat within said sleeve with its cutting end projecting from the first end thereof; C. a cap member
Claim 41
Dependent Claim
24 words
with said instrument being adapted to seat within said sleeve with its cutting end projecting from the first end thereof; C. a cap member
Claim 42
Dependent Claim
37 words
The device of claim 1 further characterized by the fact that A. said sleeve has a circumferential groove on its external surface; B. said handle means including a spring loaded gripping member adapted to engage said groove.
Claim 43
Dependent Claim
24 words
The device of claim 5 further characterized by the presence of a series of serrations on at least a porTion of said gripping member.
Claim 44
Dependent Claim
21 words
The device of claim 1 further characterized by the presence of safety means adapted to interlock said handle and said sleeve.
Claim 45
Dependent Claim
43 words
The device of claim 7 further characterized by the fact that said safety means include A. a clip adapted to engage said sleeve adjacent its first and second ends; and B. means carried by said handle and adapted to releasably engage said clip.
Claim 46
Dependent Claim
19 words
The device of claim 1 further characterized by the presence of means for locking said instrument in said sleeve.
Claim 47
Dependent Claim
11 words
A dental tool system comprising; A. a hollow, elongate sleeve having
Claim 48
Dependent Claim
11 words
A dental tool system comprising; A. a hollow, elongate sleeve having
References Cited (Backward Citations)
US1366877A
Cited
US3562913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |