Biased spring hard needle retractable IV catheter

• US 5,997,507 A
• Filed: 08/07/1998
• Issued: 12/07/1999
• Est. Priority Date: 08/07/1998
• Status: Expired due to Fees

• Current Assignee: Edward D. Dysarz
• Original Assignee: Edward D. Dysarz
• Inventors: Dysarz, Edward D.
• Primary Examiner(s): Cuggins, Wynn Wood
• Assistant Examiner(s): Blyveis, Deborah
• Application Number:
  US09/130,969
• Time in Patent Office: 487 Days
• Field of Search: 604/110, 604/158, 604/164, 604/168, 604/171, 604/181, 604/187, 604/195, 604/263, 604/198, 604/161
• US Class Current: 604/161
• CPC Class Codes: A61M 25/0631 having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle
• CPC Class Codes: A61M 5/3232 Semi-automatic needle retraction, i.e. in which triggering of the needle retraction requires a deliberate action by the user, e.g. manual release of spring-biased retraction means

Abstract

A intravenous catheter device having a biased spring hard needle, disposed in a soft catheter. The biased spring hard needle is held within an elongated hollow barrel wherein the biased spring hard needle is extended past the first end of the soft catheter, and is further disposed in the inside of the soft catheter and further extends past the first end of the elongated hollow barrel wherein the biased spring hard needle is pulled into an almost straight line wherein the second end of the biased spring hard needle is fixed to an end cap at the second end of the elongated hollow barrel. The biased spring hard needle is held within the soft catheter and the elongated hollow barrel by a latch means. When the latch means is disengaged with the biased spring hard needle, the spring section of the biased spring hard needle that is near the second end of the biased spring hard needle instantly withdraws the first end of the biased spring hard needle out of the soft catheter and further withdraws the first end of the biased spring hard needle out of the first end of the elongated hollow barrel wherein the first end of the biased spring hard needle cannot accidentally prick or injury a person thereby preventing an accidental injection of bacteria, virus or other undesirable material into a person.

Claims

1. An intravenous catheter device for inserting a hard needle and a soft catheter into a body and withdrawing said hard needle from said body and safely covering said hard needle for further disposal comprised;

an elongated hollow barrel with a first end a second end an inside surface and an outside surface, a latch foundation hole formed near the first end of said elongated hollow barrel wherein said latch foundation hole extends from said inside surface to said outside surface of said elongated hollow barrel and wherein a needle release hole is formed near said first hole wherein said needle release hole extends from said inside surface to said outside surface of said elongated hollow barrel;

an elongated hollow barrel flange formed on said first end of said elongated hollow barrel wherein said elongated hollow barrel flange has a first side and a second side and a flange hole is formed in said elongated hollow flange wherein said flange hole extends from said first side to said second side of said elongated hollow barrel flange;

an end cap wherein said end cap has a first end and a second end and wherein said second end has an end cap a cover with a first side and a second side and wherein a cap hole is formed in said end cap cover and wherein said cap hole extends from said first side to said second side of said end cap cover;

a needle release button with a first end and a second end wherein said needle release button has a depressor knob on said first end and said needle release button has stop knob near said second end and said needle release button is disposed in said needle release hole formed in said elongated hollow barrel;

a latch foundation with a first end a second end, third end a fourth end and a foundation incline plane near said first end of said latch foundation wherein said latch foundation is disposed in and fixed to said latch foundation hole formed in said elongated hollow barrel;

an inclined plane latch with a first end, a second end, a third end, and a fourth end and wherein a latch inclined plane is formed on said third end between said first end and said second end of said inclined plane latch and wherein a needle hole is formed in said inclined plane latch that extends from said first end to said second end of said inclined plane latch;

a hub post with a first end and a second end and wherein a hub hole is formed in said hub post and said hub hole extends from the first end of said hub post to said second end of said hub post and wherein said hub post is disposed in said flange hole formed in said elongated hollow barrel flange;

a soft catheter with a first end and a second end wherein said first end of said soft catheter is inserted into said body;

a first hub with a first end and a second end wherein said first end of said first hub is fixed to said second end of said soft catheter and wherein said first hub is hollow with an inside surface and an outside surface and wherein said second end of said inside of said first hub is disposed about said first end of said hub post;

a biased spring hard needle with a first section and a second section wherein said first section of said biased spring hard needle has a first end and a second end and wherein said second section of said biased spring hard needle has a first end and a second end and wherein a biased spring is formed on said second section of said biased spring hard needle and said first section of said biased spring hard needle is disposed in said soft catheter and said second end of said first section of said biased spring hard needle is further disposed in said hub hole formed in said hub post and wherein said biased spring hard needle is fixed to said hub post, and wherein said second end of said first section of said biased spring hard needle is disposed in said needle hole famed in said inclined plane latch and said biased spring hard needle is fixed to said inclined plane latch and wherein said second section of said biased spring hard needle is formed into a biased spring and said biased spring is pulled until said second section of said biased spring hard needle is essentially formed into an almost straight line and said second section of said biased spring hard needle is pulled into a biased spring and wherein said second end of said second section is fixed to said end cap and wherein said end cap is fixed to said second end of said elongated hollow barrel and wherein said latch inclined plane formed on said inclined plane latch that is fixed to said biased spring hard needle is slideably fixed and hooked to said latch inclined plane formed on said latch foundation thereby preventing said second section of said biased spring hard needle from recoiling into said second end of said elongated hollow barrel and wherein when said needle release button is depressed, said needle release button further thrusts against said inclined plane latch thereby causing said latch incline plane to slide off of said foundation inclined plane formed on said latch foundation thereby releasing said biased spring hard needle further allowing said biased spring formed on said second section of said biased spring hard needle to recoil or reform into a coil thereby withdrawing said first section of said biased spring hard needle from said soft catheter and further withdrawing said point formed on said first end of said first section of said biased spring hard needle wherein said point is withdrawn into said first end of said elongated hollow barrel past said second side of said elongated hollow barrel flange thus enclosing said biased spring hard needle within said elongated hollow barrel and said elongated hollow barrel flange.

2. The intrvenous catheter device of claim 1 wherein a fluid release hole is formed in said biased spring hard needle to allow blood or other fluid to be released from the cannula formed in said biased spring hard needle.

3. The intravenous catheter device of claim 1 wherein when said biased spring hard needle is withdrawn into said elongated hollow barrel, said soft catheter remains in said body.

4. The intravenous catheter device of claim 1 wherein said biased spring hard needle acts as a transverse spring and thereby prevents said needle release button from releasing said inclined plane latch until said needle release button is depressed.

5. The intravenous catheter device of claim 1 wherein an anti rotation guide is formed at the second end of said needle release button and wherein an anti rotation slot is formed in the fourth end of said latch foundation and wherein said anti rotation guide is disposed in said anti rotation slot thereby preventing said biased spring hard needle from rotating.

6. The intravenous catheter device of claim 1 wherein said second end of said hub post is tapered wherein said hub post will not catch on said latch foundation as said hub post is being withdrawn into said elongated hollow barrel.

7. The intravenous catheter device of claim 1 wherein said first hub is fixed to said hub post by friction thereby allowing said hub post to be withdrawn from said second end of said first hub as said hub post fixed to said biased spring hard needle is withdrawn into said elongated hollow barrel.

8. The intravenous catheter device of claim 1 wherein said second end of said biased spring hard needle is formed into a loop and wherein said loop is pulled past said second side of said end cap cover and wherein an end bar is inserted into said loop and wherein said end bar prevents said second end of said biased spring hard needle to be withdrawn into said second end of said elongated hollow barrel.

9. The intravenous catheter device of claim 1 wherein said end bar is fixed to said end cap with adhesive.

10. The intravenous catheter device of claim 1 wherein said second section of said biased spring hard needle is formed into said coil thereby preventing said first end of said first section of said biased spring hard needle from being withdrawn past said elongated hollow barrel flange.