Patent US3760809A successfully refreshed from Google Patents.
US3760809A
Expired / Lapsed
US
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Surgical lancet having casing
Assignee: Damon Corp
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Filing: 1971-10-22
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Granted: 1973-09-25
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Expires: 1991-10-22
Abstract
Abstract A surgical lancet which has a blade resiliently driven to lance dermal tissue with a snap action has a presser foot that forms a cavity directly over the dermal tissue being lanced and has a cavity-encircling rim for placing against tissue adjacent the lancing site. The rim presses against the dermal tissue to pucker tissue at the lancing site into the cavity and to constrict veinal capillaries adjacent the lancing site. The puckered tissue ensures that the lance is not pressed into bone structure, and the vasoconstriction causes a localized engorgement at the lancing site. The lancet further has a manually holdable casing that forms an aseptic enclosure for the lancing blade, with a septum that the blade pierces in snaping to the lancing position.
Inventors
- 👤 S Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:18
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3209; A61B17/32093; A61B5/00; A61B5/15; A61B5/150007; A61B5/150015; A61B5/150022; A61B5/150053; A61B5/150061; A61B5/150068; A61B5/150206; A61B5/150267; A61B5/150274; A61B5/150282; A61B5/150312; A61B5/150328; A61B5/150374; A61B5/150381; A61B5/150442; A61B5/150458; A61B5/150465; A61B5/151; A61B5/15101; A61B5/15103; A61B5/15107; A61B5/15113; A61B5/15115; A61B5/15117; A61B5/15186; A61B5/15188; A61B5/1519; A61B5/150175
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
182 words
A surgical lancet having i. a manually holdable first member, ii. a presser foot disposed on said first member for placing against dermal tissue to be lanced, iii. a lancing blade pointed in a first direction, and iv. means mounting said blade to said first member for movement relative to said first member between a lancing position where said blade protrudes in said first direction beyond said presser foot, and a retracted position where said blade is removed from said presser foot in a second direction opposite to said first direction, and having the improvement wherein said presser foot A. has vasoconstricting rim means at least partially encircling a first area through which said blade protrudes when in said lancing position and adapted to constrIct along the periphery of said area veinal capillaries of the dermal tissue to be lanced by said blade, and B. forms cavity means within said rim means and recessed from said rim means in said second direction for a depth sufficient to receive, without significant constriction of veinal capillaries therein, dermal tissue bounded by said rim means.
Claim 2
Dependent Claim
182 words
A surgical lancet having i. a manually holdable first member, ii. a presser foot disposed on said first member for placing against dermal tissue to be lanced, iii. a lancing blade pointed in a first direction, and iv. means mounting said blade to said first member for movement relative to said first member between a lancing position where said blade protrudes in said first direction beyond said presser foot, and a retracted position where said blade is removed from said presser foot in a second direction opposite to said first direction, and having the improvement wherein said presser foot A. has vasoconstricting rim means at least partially encircling a first area through which said blade protrudes when in said lancing position and adapted to constrIct along the periphery of said area veinal capillaries of the dermal tissue to be lanced by said blade, and B. forms cavity means within said rim means and recessed from said rim means in said second direction for a depth sufficient to receive, without significant constriction of veinal capillaries therein, dermal tissue bounded by said rim means.
Claim 3
Dependent Claim
42 words
A lancet according to claim 1 having the further improvement in that said presser foot has an initially unbroken septum forming at least part of a wall bounding said cavity means, and through which said blade protrudes when in said lancing position.
Claim 4
Dependent Claim
17 words
carrying latching means engageable with said latch section to hold said blade in said retracted position, and
Claim 5
Dependent Claim
17 words
carrying latching means engageable with said latch section to hold said blade in said retracted position, and
Claim 6
Dependent Claim
24 words
carrying a release actuator movable to disengage said latch section from said latching means for allowing said blade to snap into said lancing position.
Claim 7
Dependent Claim
24 words
carrying a release actuator movable to disengage said latch section from said latching means for allowing said blade to snap into said lancing position.
Claim 8
Dependent Claim
27 words
A lancet according to claim 1 having the further improvement in that said rim means of said presser foot is contoured to seat on a human finger.
Claim 9
Dependent Claim
147 words
A surgical lancet having i. a manually holdable first member, ii. a presser foot disposed on said first member for placing against dermal tissue to be lanced, iii. a lancing blade pointed in a first direction, and iv. means mounting said blade to said first member for movement relative thereto between a lancing position where said blade protrudes in said first direction beyond said presser foot, and a retracted position where said blade is removed from said presser foot in a second direction opposite to said first direction, and having the improvement comprising a body casing totally enclosing said mounting means and blade and forming an aseptic enclosure therefor, said casing forming said first member and said presser foot, and having a normally intact septum forming part of said enclosure and pierced by said blade in the movement thereof from said retracted position to said lancing position.
Claim 10
Dependent Claim
147 words
A surgical lancet having i. a manually holdable first member, ii. a presser foot disposed on said first member for placing against dermal tissue to be lanced, iii. a lancing blade pointed in a first direction, and iv. means mounting said blade to said first member for movement relative thereto between a lancing position where said blade protrudes in said first direction beyond said presser foot, and a retracted position where said blade is removed from said presser foot in a second direction opposite to said first direction, and having the improvement comprising a body casing totally enclosing said mounting means and blade and forming an aseptic enclosure therefor, said casing forming said first member and said presser foot, and having a normally intact septum forming part of said enclosure and pierced by said blade in the movement thereof from said retracted position to said lancing position.
Claim 11
Dependent Claim
79 words
A lancet according to claim 4 having the further improvement wherein A. said mounting means includes an elongated spring member having a mounting section at a first end, a latch section at another end and a blade-driving spring section therebetween which carries said blade, said spring member resiliently urging said blade thereon to move with a snap-action from said retracted position to said lancing position, and B. two matingly engaging casing elements form said aseptically-enclosing casing, said casing elements
Claim 12
Dependent Claim
30 words
A lancet according to claim 5 wherein said casing elements further form flexible web means forming part of said casing enclosure and mounting said release actuator for said disengaging movement.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |