US4985034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety surgical blade, handle and shield
Assignee: The University of Texas System
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Filing: 1989-06-01
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Granted: 1991-01-15
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Expires: 2009-06-01
Abstract
Abstract A surgical scalpel is provided consisting of a handle, a blade, and a removable and reattachable blade shield to encase the blade both before and after use and reduce the likelihood of accidental contact with the blade. The blade is retained in the blade shield prior to use through tape or other closure means. Upon removal of the closure means, the forward end of the surgical handle is attached to a handle socket in the base of the blade preferably through a pawl and notch releasable interengagement mechanism, and the blade, securely attached to the handle may be withdrawn from the blade shield. After use, the blade is returned to the blade shield. A force in the direction of the cutting edge of the blade is applied to the handle causing a weakened floor of the handle socket to be displaced and forcing the handle socket walls of the blade base into retaining recesses defined in the blade shield thus securing the used blade within the blade shield. The handle is then withdrawn from the blade base and the handle can be reused. The used blade, secured within the blade shield, may be safely disposed.
Inventors
- 👤 James M. Lipton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:38
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3209; A61B17/3211; A61B17/3213; A61B17/3215; A61B17/3217
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
68 words
A scalpel comprising: a handle having a forward end and a rearward grip end; a blade having a forward cutting end and a rearward end adapted to releasably interengage the forward end of said handle, said rearward end comprising a handle socket having a weakened section in the direction of the cutting edge of said surgical blade; and a removable and reattachable blade shield for encasing said blade.
Claim 2
Dependent Claim
68 words
A scalpel comprising: a handle having a forward end and a rearward grip end; a blade having a forward cutting end and a rearward end adapted to releasably interengage the forward end of said handle, said rearward end comprising a handle socket having a weakened section in the direction of the cutting edge of said surgical blade; and a removable and reattachable blade shield for encasing said blade.
Claim 3
Dependent Claim
29 words
The device of claim 1 wherein said blade further comprises a shield breakaway space abutting said weakened section and defined by said weakened section and said handle socket walls.
Claim 4
Dependent Claim
25 words
The device of claim 2 wherein said handle socket walls define a progressively narrower shield breakaway space in a direction away from said weakened section.
Claim 5
Dependent Claim
31 words
The device of claim 2 wherein said handle socket walls each further comprise a groove positioned proximate said weakened section on the outer portion of each respective said handle socket wall.
Claim 6
Dependent Claim
31 words
The device of claim 3 wherein said handle socket walls each further comprise a groove positioned proximate said weakened section on the outer portion of each respective said handle socket wall.
Claim 7
Dependent Claim
22 words
The device of claim 2 wherein said blade shield comprises an opening for receiving and containing different surgical blade sizes and configurations.
Claim 8
Dependent Claim
28 words
The device of claim 6 wherein said blade shield further comprises recesses defined within said opening and able to receive said handle socket walls in a locking relation.
Claim 9
Dependent Claim
135 words
A scalpel blade and blade shield comprising: a blade shield having a housing defining an opening at one end configured to receive a scalpel blade in longitudinally slidable relation along one orthogonal axis; a scalpel blade having a cutting edge along its forward end and a base at its rearward end, said blade configured to slide into said housing through said opening with its forward end projecting into said housing; a first interengaging means operable to retain said blade within said blade shield, said means comprising laterally opposed recesses within the blade shield, and expansible members on said base operable to expand into said recesses; the base end of said blade defining a socket holder adapted to receive a handle; and a second releasable interengaging means operable to retain a handle within said socket holder.
Claim 10
Dependent Claim
135 words
A scalpel blade and blade shield comprising: a blade shield having a housing defining an opening at one end configured to receive a scalpel blade in longitudinally slidable relation along one orthogonal axis; a scalpel blade having a cutting edge along its forward end and a base at its rearward end, said blade configured to slide into said housing through said opening with its forward end projecting into said housing; a first interengaging means operable to retain said blade within said blade shield, said means comprising laterally opposed recesses within the blade shield, and expansible members on said base operable to expand into said recesses; the base end of said blade defining a socket holder adapted to receive a handle; and a second releasable interengaging means operable to retain a handle within said socket holder.
Claim 11
Dependent Claim
20 words
The scalpel blade and shield of claim, 8 in which the second interengaging means comprises a notch and pawl mechanism.
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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) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |