US5478346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scalpel
Assignee: Granton Ragg Ltd
•
Filing: 1993-11-02
•
Granted: 1995-12-26
•
Expires: 2013-11-02
Abstract
Abstract The invention relates to scalpels. By their nature, scalpels are exceedingly sharp, and there is the growing requirement of the provision of a guard over the blade at its point of manufacture to eliminate risk to the operative removing the scalpel from its packaging. With guards known hitherto, it is common practice to replace the guard over the blade after use. However, this introduces the risk of a used scalpel being mistaken for an unused scalpel. The objective of the invention is to avoid this possibility, an objective met by a construction comprising a handle and a blade secured to one end of the handle, and there being a blade guard attached to the scalpel by a frangible tether, the guard having a further means to engage a co-operating part of the scalpel, said further means in conjunction with said frangible tether serving to hold the guard in place over the blade.
Inventors
- 👤 Raymond A. Capewell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:30
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3209; A61B17/3211; A61B17/3215; B; B26; B26B; B26B29/00; B26B29/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
139 words
A scalpel comprising a handle and a blade secured to the handle, a detachable blade guard attached to the handle by a frangible tether, the guard having a location means, and the handle having a mating location means on the end adjacent the guard to cooperate with the location means on the guard so that with the guard in place over the blade and the location and mating location means in engagement, a tension is induced in the tether sufficient to hold the guard in place over the blade, wherein a second location means on the guard is lug means to engage over the blade with a sufficient frictional contact, the contact between said lug means and said blade combining with said frangible tether to hold the guard over the blade for so long as the tether remains intact.
Claim 2
Dependent Claim
139 words
A scalpel comprising a handle and a blade secured to the handle, a detachable blade guard attached to the handle by a frangible tether, the guard having a location means, and the handle having a mating location means on the end adjacent the guard to cooperate with the location means on the guard so that with the guard in place over the blade and the location and mating location means in engagement, a tension is induced in the tether sufficient to hold the guard in place over the blade, wherein a second location means on the guard is lug means to engage over the blade with a sufficient frictional contact, the contact between said lug means and said blade combining with said frangible tether to hold the guard over the blade for so long as the tether remains intact.
Claim 3
Dependent Claim
41 words
A scalpel as in claim 1, wherein the handle and the guard are of an appropriate plastics material to enable the handle to be moulded along with the guard, with the frangible tether integral with both the handle and the guard.
Claim 4
Dependent Claim
37 words
A scalpel as in claim 1, wherein the lug means is spaced from the side face by a distance commensurate with the thickness of the blade, for the lug means to be a push-fit over the blade.
Claim 5
Dependent Claim
166 words
A scalpel comprising a handle and a blade secured to one end of the handle, a detachable blade guard attached to the handle by a frangible tether, the guard being of generally U-shaped cross-section of a length and height greater than that of the blade, the U-shaped guard being closed to one side and over its outer end, and open to its opposite side and at its end of closest approach to the handle, one side wall of the guard being formed of shorter length than the other, there being a location means formed on the edge of the shorter side wall of the guard to cooperate with a mating location means on the adjacent end of the handle, the guard being attached to the handle by a frangible tether, so that with the guard in place over the blade and the location and mating location means in engagement, a tension is induced in the tether sufficient to hold the guard in place over the blade.
Claim 6
Dependent Claim
166 words
A scalpel comprising a handle and a blade secured to one end of the handle, a detachable blade guard attached to the handle by a frangible tether, the guard being of generally U-shaped cross-section of a length and height greater than that of the blade, the U-shaped guard being closed to one side and over its outer end, and open to its opposite side and at its end of closest approach to the handle, one side wall of the guard being formed of shorter length than the other, there being a location means formed on the edge of the shorter side wall of the guard to cooperate with a mating location means on the adjacent end of the handle, the guard being attached to the handle by a frangible tether, so that with the guard in place over the blade and the location and mating location means in engagement, a tension is induced in the tether sufficient to hold the guard in place over the blade.
References Cited (Backward Citations)
GB848388A
Cited
US4531286A
Cited
EP0201304A2
Cited
GB2187989A
Cited
US4675996A
Cited
US4980977A
Cited
US5330494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-25 | 1999-06-26 | 1999-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-25 | 2003-06-26 | 2003-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-25 | 2007-06-26 | 2007-12-26 | $7700.00 | Window Closed / Lapsed |