US3613684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trocar catheters
Assignee: Individual
•
Filing: 1969-09-19
•
Granted: 1971-10-19
•
Expires: 1989-09-19
Abstract
Abstract A trocar catheter is formed with a rigid shaftlike stylet and an encircling catheter made of plastic material. The catheter has a molded rigid distal end member with a conical shape, a closed rounded tip fixed to a flexible tube, and at least one fluid opening through the side. The rigid distal end member has an interior that conforms to the shape of the stylet tip. The device may be used in emergency cases where the catheter is forced through the chest wall of a patient over the stylet which is then withdrawn to let fluid pass through the catheter or for suprapubic cystostomy procedures.
Inventors
- 👤 David S Sheridan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:30
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3415; A61M; A61M25/00; A61M25/01; A61M25/09; A61M25/09016; A61M25/09033; A61B17/04; A61B17/06; A61B17/06066; A61B2017/06085
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
200 words
A trocar catheter comprising: A. a rigid stylet including: a. a rigid metal shaft of circular cross section, b. a source square tip on the distal end of the shaft, and c. an enlarged hand-engaging member attached to the proximal end of the shaft, B. a catheter formed of plastic material including: a. a rigid or semirigid distal end member molded of rigid or semirigid plastic material with a closed conical-shaped, smoothly rounded tip, b. at least one fluid opening through the sidewall, c. a proximal end portion, d. a central body portion of cylinDrical shape integral with said proximal end portion and joined to said distal end member, e. said central body portion being formed of transparent flexible plastic material, f. the interior of said distal end member being molded to conform in shape to the square tip of said rigid stylet, and g. the interior of said central body portion being formed to closely encircle the surface of said rigid shaft, and C. depth penetration limit means including: a. a slotted tubular member movably embracing the outer surface of said central body portion, and b. a slotted radially extending collar fixed upon one end of said tubular member.
Claim 2
Dependent Claim
200 words
A trocar catheter comprising: A. a rigid stylet including: a. a rigid metal shaft of circular cross section, b. a source square tip on the distal end of the shaft, and c. an enlarged hand-engaging member attached to the proximal end of the shaft, B. a catheter formed of plastic material including: a. a rigid or semirigid distal end member molded of rigid or semirigid plastic material with a closed conical-shaped, smoothly rounded tip, b. at least one fluid opening through the sidewall, c. a proximal end portion, d. a central body portion of cylinDrical shape integral with said proximal end portion and joined to said distal end member, e. said central body portion being formed of transparent flexible plastic material, f. the interior of said distal end member being molded to conform in shape to the square tip of said rigid stylet, and g. the interior of said central body portion being formed to closely encircle the surface of said rigid shaft, and C. depth penetration limit means including: a. a slotted tubular member movably embracing the outer surface of said central body portion, and b. a slotted radially extending collar fixed upon one end of said tubular member.
Claim 3
Dependent Claim
19 words
A trocar catheter as claimed in claim 1 wherein said tubular member and collar are formed in complementary half-sections.
Claim 4
Dependent Claim
16 words
A trocar catheter as claimed in claim 2 wherein said half-sections are molded of plastic material.
References Cited (Backward Citations)
US402902A
Cited
US2393003A
Cited
DE885917C
Cited
US3127894A
Cited
US3128769A
Cited
US3288901A
Cited
US3459189A
Cited
US3444860A
Cited
US3515137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |