US5720749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral reamer apparatus with guide counterbores in female press-fitted parts
Assignee: Snap On Inc
•
Filing: 1996-03-18
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Granted: 1998-02-24
•
Expires: 2016-03-18
Abstract
Abstract A medullary rotational reaming apparatus includes an elongated, flexible, hollow, tubular shaft formed of a nickel-titanium alloy and having coupling portions at the opposite ends thereof. Each of a cutter head and a rotational drive coupling element has a hollow tubular coupling shank, each shank having a coupling inner surface which is quadrilobular in transverse cross section and is dimensioned to prevent free reception of a coupling portion of the shaft therein. The coupling portions of the shaft are axially press-fitted in permanent engagement, respectively, within the shanks of the cutter head and the drive coupling element, with said coupling portions being permanently deformed to the transverse cross section of the coupling inner surface of the shanks, thereby to fix the cutter head and the coupling element to the shaft solely by the press-fitted engagement of the coupling portions in the shanks.
Inventors
- 👤 Glenn A. Rupp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:27
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/164; A61B2017/00477
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
146 words
A medullary rotational reaming apparatus comprising: an elongated flexible shaft having a coupling portion at an end thereof, and an end member having a hollow tubular coupling shank, said shank having a coupling inner surface which has a transverse cross section with a maximum transverse dimension such as to prevent free reception of said coupling portion therein, said coupling shank having a circularly cylindrical counterbore portion with a diameter slightly greater than the maximum transverse dimension of said coupling inner surface, and a transition portion joining said counterbore to said coupling inner surface, said coupling portion being axially received in press-fitted permanent engagement within said shank with said coupling portion permanently deformed to the transverse cross section of the coupling inner surface of said shank, whereby said end member is fixed to said shaft solely by the press-fitted engagement of said coupling portion in said shank.
Claim 2
Dependent Claim
146 words
A medullary rotational reaming apparatus comprising: an elongated flexible shaft having a coupling portion at an end thereof, and an end member having a hollow tubular coupling shank, said shank having a coupling inner surface which has a transverse cross section with a maximum transverse dimension such as to prevent free reception of said coupling portion therein, said coupling shank having a circularly cylindrical counterbore portion with a diameter slightly greater than the maximum transverse dimension of said coupling inner surface, and a transition portion joining said counterbore to said coupling inner surface, said coupling portion being axially received in press-fitted permanent engagement within said shank with said coupling portion permanently deformed to the transverse cross section of the coupling inner surface of said shank, whereby said end member is fixed to said shaft solely by the press-fitted engagement of said coupling portion in said shank.
Claim 3
Dependent Claim
13 words
The apparatus of claim 1, wherein said end member is a cutter head.
Claim 4
Dependent Claim
14 words
The apparatus of claim 1, wherein said end member is a drive coupling element.
Claim 5
Dependent Claim
20 words
The apparatus of claim 1, wherein said coupling inner surface has a transverse cross section which has a multiple-lobed configuration.
Claim 6
Dependent Claim
15 words
The apparatus of claim 1, wherein said shaft is formed of a superelastic metal alloy.
Claim 7
Dependent Claim
16 words
The apparatus of claim 1, wherein said coupling inner surface is non-circular in transverse cross section.
Claim 8
Dependent Claim
13 words
The apparatus of claim 1, wherein said transition portion includes a frustoconical shoulder.
Claim 9
Dependent Claim
216 words
A medullary rotational reaming apparatus comprising: an elongated flexible shaft having first and second coupling portions respectively at opposite ends thereof; a cutting head having a first hollow tubular coupling shank; and a rotational drive coupling element having a second hollow tubular coupling shank, each of said first and second shanks having a coupling inner surface which has a transverse cross section with a maximum transverse dimension such as to prevent free reception of said coupling portions therein, each of said coupling shanks having a circularly cylindrical counterbore portion with a diameter slightly greater than the maximum transverse dimension of said coupling inner surface, and a transition portion joining said counterbore to said coupling inner surface, said first coupling portion being axially received in press-fitted permanent engagement within said first shank with said first coupling portion permanently deformed to the transverse cross section of the coupling inner surface of said first shank, said second coupling portion being axially received in press-fitted permanent engagement within said second shank with said second coupling portion permanently deformed to the transverse cross section of the coupling inner surface of said second shank, whereby said cutting head and said rotational drive coupling element are fixed on said shaft solely by the press-fitted engagement of said coupling portions respectively in said shanks.
Claim 10
Dependent Claim
216 words
A medullary rotational reaming apparatus comprising: an elongated flexible shaft having first and second coupling portions respectively at opposite ends thereof; a cutting head having a first hollow tubular coupling shank; and a rotational drive coupling element having a second hollow tubular coupling shank, each of said first and second shanks having a coupling inner surface which has a transverse cross section with a maximum transverse dimension such as to prevent free reception of said coupling portions therein, each of said coupling shanks having a circularly cylindrical counterbore portion with a diameter slightly greater than the maximum transverse dimension of said coupling inner surface, and a transition portion joining said counterbore to said coupling inner surface, said first coupling portion being axially received in press-fitted permanent engagement within said first shank with said first coupling portion permanently deformed to the transverse cross section of the coupling inner surface of said first shank, said second coupling portion being axially received in press-fitted permanent engagement within said second shank with said second coupling portion permanently deformed to the transverse cross section of the coupling inner surface of said second shank, whereby said cutting head and said rotational drive coupling element are fixed on said shaft solely by the press-fitted engagement of said coupling portions respectively in said shanks.
Claim 11
Dependent Claim
20 words
The apparatus of claim 8, wherein said coupling inner surface has a transverse cross section which has a multiple-lobed configuration.
Claim 12
Dependent Claim
15 words
The apparatus of claim 8, wherein said shaft is formed of a superelastic metal alloy.
Claim 13
Dependent Claim
16 words
The apparatus of claim 8, wherein said coupling inner surface is non-circular in transverse cross section.
Claim 14
Dependent Claim
13 words
The apparatus of claim 8, wherein said transition portion includes a frustoconical shoulder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-02-23 | 2001-08-25 | 2002-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-23 | 2005-08-25 | 2006-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-23 | 2009-08-25 | 2010-02-24 | $7700.00 | Window Closed / Lapsed |