IMPLANT TROCAR

• US 3,620,216 A
• Filed: 06/25/1969
• Issued: 11/16/1971
• Est. Priority Date: 06/25/1969
• Status: Expired due to Term

• Current Assignee: N/A
• Original Assignee: N/A
• Primary Examiner(s): L. W. Trapp
• Application Number:
  US04/836,566
• Time in Patent Office: 874 Days
• Field of Search: 128/217,218,213,347,264,216,222,215,223 206/43
• US Class Current: 604/60
• CPC Class Codes: A61B 17/3468 for implanting or removing devices, e.g. prostheses, implants, seeds, wires devices for implanting seeds A61M37/0069
• CPC Class Codes: A61M 31/00 Devices for introducing or retaining media, e.g. remedies, in cavities of the body A61M25/00 takes precedence ; introducing or retaining ophthalmic products into the ocular cavities A61F9/0008
• CPC Class Codes: A61M 37/00 Other apparatus for introducing media into the body for reproduction or fertilisation A61B17/425; apparatus for iontophoresis or cataphoresis A61N1/30; Percutany, i.e. introducing medicines into the body by diffusion through the skin salt baths A61H33/04
• CPC Class Codes: A61M 37/0069 Devices for implanting pellets, e.g. markers or solid medicaments for introducing of radioactive sources for interstitial radiation therapy, i.e. brachytherapy A61N5/1027
• CPC Class Codes: A61M 5/3286 Needle tip design, e.g. for improved penetration

Abstract

An implant trocar for treating animals comprises a reciprocatory plunger within a pellet-containing barrel. The plunger is controlled by an operating shaft extending through a guiding slot in the wall of the barrel. A curved finger grip extends from the barrel opposite the operating shaft and enables the rounded heel of the barrel to be located against the palm of the hand of the user.

Claims

1. An implant trocar comprising in combination a barrel having a tubular wall defining a bore and terminating in a heel end having a conical surface with its large end outermost and a sharpened tip end, said wall having a longitudinal slot therethrough intermediate said ends, a grip extending radially from said wall opposite said slot, a plunger having tip and heel ends slidably received within said bore and adapted to reciprocate between a retracted and a forward position, an operating shaft extending from said plunger heel end and through said slot, and sealing means between said plunger tip and said bore.

2. A trocar according to claim 1 wherein the sealing means is an O-ring.

3. A trocar according to claim 1 wherein the sharpened tip comprises a bevel surface at an angle of about 20* to the axis of said bore and two flats at an angle of about 90* to the bevel surface.

4. A trocar according to claim 1 wherein the plunger has a section of reduced diameter between its ends.

5. An implant trocar as in claim 3 including a pellet within said bore and adjacent the tip of the barrel, the length of the pellet and plunger being sufficient that the tip of the pellet extends to the intersection of the bevel and bore when the plunger is in a retracted position.

6. A trocar according to claim 1 having a rounded, palm-contacting surface on the heel end of the barrel.