EP0265193A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A trocar
Assignee: United States Surgical Corp
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Filing: 1987-10-19
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Granted: —
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Expires: 2007-10-19
Abstract
Abstract The trocar is provided with a leaf spring (25) in the housing (13) whch abuts a collar (17) on a protective tube (16) which surrounds the sharp tip (15) of the stylet (14). A spring finger (26) extending from the leaf spring is actuated by a slider (28) when the two housings (13, 37) of the trocar components are squeezed together. The spring finger initially lifts the leaf spring from the collar to release the protective tube for sliding proximally while the collar subsequently lifts the spring finger from the shoulder of the slider to prevent a re-release of the leaf spring when the protective tube (16) is moved back into the extended position.
Inventors
- 👤 Jack R. Lander
- 👤 A Holmes William
- 👤 F Costa Peter
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 08:33
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3494; A61B17/3496; A61B90/00; A61B90/08; A61B2090/0801; A61B2090/08021
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
104 words
A trocar comprising a first housing; a stylet secrured to and extending from said housing, said stylet having a sharp tip at a distal end; a protective tube slidably mounted in said housing between an extended position and a retracted position, said tube being disposed concentrically about said stylet; a spring in said housing biasing said tube outwardly of said housing into said extended position; latch means in said housing for locking said tube in said extended position; and a slider slidably mounted in the projecting from said housing for releasing said latch means to permit movement of said tube into said retracted position.
Claim 2
Dependent Claim
104 words
A trocar comprising a first housing; a stylet secrured to and extending from said housing, said stylet having a sharp tip at a distal end; a protective tube slidably mounted in said housing between an extended position and a retracted position, said tube being disposed concentrically about said stylet; a spring in said housing biasing said tube outwardly of said housing into said extended position; latch means in said housing for locking said tube in said extended position; and a slider slidably mounted in the projecting from said housing for releasing said latch means to permit movement of said tube into said retracted position.
Claim 3
Dependent Claim
43 words
A trocar as set forth in claim 1 which further comprises a second housing coaxial of said first housing to define a handgrip therewith and a guide tube secured to and extending from said second housing with said protective tube slidably mounted therein.
Claim 4
Dependent Claim
38 words
A trocar as set forth in claim 2 wherein said slider projects from said first housing against said second housing whereby squeezing of said housings together pushes said slider into said first housing to release said latch means.
Claim 5
Dependent Claim
56 words
A trocar as set forth in claim 3 wherein said latch means includes a leaf spring abutting said tube in said extended position and a spring finger extending from said leaf spring into abutment with said slider for lifting said leaf spring from said tube in response to movement of said slider into said first housing.
Claim 6
Dependent Claim
26 words
A trocar as set forth in claim 4 which further comprises a collar on said tube in abutment with said leaf spring in said extended position.
Claim 7
Dependent Claim
37 words
A trocar as set forth in claim 5 wherein said collar is slidable along said leaf spring to lift and release said spring finger from said slider at an intermediate point of movement along said leaf spring.
Claim 8
Dependent Claim
32 words
A trocar as set forth in claim 5 which further comprises a guide slot in said first housing and a guide pin secured to said collar and slidably mounted in said slot.
Claim 9
Dependent Claim
21 words
A trocar as set forth in claim 3 which further comprises a spring biasing said slider outwardly of said first housing.
Claim 10
Dependent Claim
41 words
A trocar as set forth in claim 2 which further comprises a seal ring in said housing having a main portion sealingly engaging said protective tube and an annular flap extending from said main portion and sealingly engaging said protective tube.
Claim 11
Dependent Claim
56 words
A trocar as set forth in claim 1 wherein said latch means includes a leaf spring abutting said tube in said extended position and a spring finger extending from said leaf spring into abutment with said slider for lifting said leaf spring from said tube in response to movement of said slider into said first housing.
Claim 12
Dependent Claim
47 words
In a trocar, the combination comprising a spring-biased tube movably mounted between an extended position and a retracted position; latch means for locking said tube in said extended position; and a slider for releasing said latch means to permit movement of said tube into said retracted position.
Claim 13
Dependent Claim
47 words
In a trocar, the combination comprising a spring-biased tube movably mounted between an extended position and a retracted position; latch means for locking said tube in said extended position; and a slider for releasing said latch means to permit movement of said tube into said retracted position.
Claim 14
Dependent Claim
56 words
The combination as set forth in claim 11 wherein said latch means includes a leaf spring abutting said tube in said extended position and a spring finger extending from said leaf spring into abutment with said slider for lifting said leaf spring from said tube in response to movement of said slider into said first housing.
Claim 15
Dependent Claim
26 words
The combination as set forth in claim 12 which further comprises a collar on said tube in abutment with said leaf spring in said extended position.
Claim 16
Dependent Claim
37 words
The combination as set forth in claim 13 wherein said collar is slidable along said leaf spring to lift and release said spring finger from said slider at an intermediate point of movement along said leaf spring.
Claim 17
Dependent Claim
44 words
The combination as set forth in claim 11 wherein said latch means is a unitary body having a base, a leaf spring extending from said base to define a U-shape and a spring finger extending from said leaf spring into abutment with said slider.
Claim 18
Dependent Claim
112 words
In a trocar, the combination comprising a housing; a stylet secured to and extending from said housing; a tube slidably mounted at a proximal end in said housing and extending concentrically about said stylet for movment between an extended position and a retracted postion; a collar on said proximal end of said tube; a leaf spring in said housing abutting said collar to lock said tube in said extended position; a slider reciprocally mounted and projecting from said housing; and means extending between said slider and said leaf spring for releasing said leaf spring from said collar in response to proximal movement of said slider to permit proximal movement of said tube.
Claim 19
Dependent Claim
112 words
In a trocar, the combination comprising a housing; a stylet secured to and extending from said housing; a tube slidably mounted at a proximal end in said housing and extending concentrically about said stylet for movment between an extended position and a retracted postion; a collar on said proximal end of said tube; a leaf spring in said housing abutting said collar to lock said tube in said extended position; a slider reciprocally mounted and projecting from said housing; and means extending between said slider and said leaf spring for releasing said leaf spring from said collar in response to proximal movement of said slider to permit proximal movement of said tube.
Claim 20
Dependent Claim
20 words
The combination as set forth in claim 16 wherein said means is a spring finger extending from said leaf spring.
Claim 21
Dependent Claim
37 words
The combination as set forth in claim 17 wherein said collar is slidable along said leaf spring to lift and release said spring finger from said slider at an intermediate point of movement along said leaf spring.
Claim 22
Dependent Claim
35 words
A latch comprising a one-piece body having a base, a leaf spring extending from one end of said base to define a U-shape and a spring finger extending angularly and intermediately from said leaf spring.
Claim 23
Dependent Claim
35 words
A latch comprising a one-piece body having a base, a leaf spring extending from one end of said base to define a U-shape and a spring finger extending angularly and intermediately from said leaf spring.
Claim 24
Dependent Claim
47 words
A latch as set forth in claim 19 wherein said leaf spring has a first position of predetermined width extending from said base to an intermediate point and a second portion of reduced width extending to a distal end, and said finger extends from said intermediate point.
References Cited (Backward Citations)
No citation records indexed.
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