Pipet gun assembly

• US 5,616,871 A
• Filed: 09/28/1995
• Issued: 04/01/1997
• Est. Priority Date: 09/28/1995
• Status: Expired due to Term

• Current Assignee: DRUMMOND SCIENTIFIC COMPANY
• Original Assignee: DRUMMOND SCIENTIFIC COMPANY
• Inventors: Kenney, James W.
• Primary Examiner(s): NOLAND, THOMAS
• Application Number:
  US08/535,468
• Time in Patent Office: 551 Days
• Field of Search: 73/864.14, 73/863, 73/863.22, 73/864.01, 73/864.11, 73/864.12, 73/864.13, 73/864.15
• US Class Current: 73/864.14
• CPC Class Codes: B01L 9/54 Supports specially adapted for pipettes and burettes automated pipetting stations G01N35/10

Abstract

A pipet gun assembly with a handle and a barrel extending from the handle and a pipet stand, wherein a pipet tube connected to the barrel is supported upright by the base of the handle and the stand connected to the barrel so that the pipet tube does not touch anything and can remain sterile. The pipet tube is supported with its admitting-emitting end below the level of its connecting end that is connected to the pipet gun so that any liquid in the pipet tube does not flow back through the tube and into the pipet gun.

Claims

1. A pipet gun assembly for supporting a pipet gun in an upright position on a work table and for holding a pipet tube so that it does not touch the work table and for holding the pipet tube at an attitude such that any liquid in the tube does not flow back through the tube and into the pipet gun, comprising

a pipet gun including a handle with a rear wall,

a barrel extending from the handle,

and support stand means connected to the pipet gun for holding the pipet gun upright on a top surface of a work bench with the barrel of the gun being upright but at an angle from the vertical, said barrel not touching the work table, so that any pipet tube having a connecting end mounted on the pipet gun barrel does not touch the work table and any such pipet tube which is sterile does not touch the work table and remains sterile,

and connecting means on the barrel for supporting a pipet tube having a connecting end connected to the barrel and an admitting-emitting tip end for admitting and emitting liquid samples, and for holding the pipet tube at an attitude such that the admitting-emitting tip end is below the level of the connecting end of the pipet tube to prevent any liquid in the tube from flowing back through the tube to the pipet gun.

2. A pipet gun assembly comprising

a pipet gun including a barrel extending from a handle,

and support stand means connected to the pipet gun for holding the pipet gun upright on a top surface of a work bench with the barrel of the gun being upright but at an angle from the vertical, said barrel not touching the work table, so that any pipet tube having a connecting end mounted on the pipet gun barrel does not touch the work table and any such pipet tube which is sterile does not touch the work table and remains sterile,

a pipet tube having an admitting-emitting tip end and a connecting end mounted on the barrel,

said pipet tube extending from the barrel, when the pipet gun is being supported upright by the support stand means, at an attitude such that the admitting-emitting tip end is below the level of the connecting end of the pipet tube so that any liquid in the tube does not flow back in the tube and into the pipet gun.

3. The pipet gun assembly of claim 2,

the pipet tube being sterile and not touching the work table when the pipet gun is being supported upright by the support stand means.

4. The pipet gun assembly of claim 2, said support stand means including

a stand,

said stand having a pair of resilient clamping arms connected together by a back panel,

each said clamping arm having a facing surface,

a pair of legs extending downwardly from the clamping arms and flaring outwardly to a pair of feet,

middle cross bar means for connecting the middle portions of the legs together and for acting as a stop for a rear wall of the handle and setting a distance between the rear wall of the handle and said feet to hold the barrel at such an angle that that said pipet tube mounted in the barrel is held with its admitting-emitting tip end being lower than the level of its connecting end so that any liquid in the tube does not flow back through the tube and into the pipet gun,

and a bottom cross bar connecting said feet together to give the legs stability.

5. The pipet gun assembly of claim 4,

the facing surface of each clamping arm including a ridge,

and a pair of grooves on the barrel for receiving and seating said ridges to connect the stand to the barrel.

6. The pipet gun assembly of claim 4,

with the feet of the stand forming a tripod with the base of the handle to hold the pipet gun upright.

7. A pipet gun assembly comprising

a pipet gun including a barrel extending from a handle with a rear wall,

and support stand means connected to the pipet gun for holding the pipet gun upright on a top surface of a work bench with the barrel of the gun upright at an angle from the vertical and not touching the work bench, so that any pipet tube having a connecting end mounted on the pipet gun barrel does not touch the work bench, and any such pipet tube which is sterile does not touch the work bench and remains sterile,

a pipet tube having an admitting-emitting tip end and a connecting end mounted on the barrel,

said pipet tube extending from the barrel, when the pipet gun is being supported upright by the support stand means, at an attitude such that the admitting-emitting tip end is below the connecting end of the pipet tube so that any liquid in the tube does not flow back in the tube and into the pipet gun,

the pipet tube being sterile and not touching the work bench when the pipet gun is being supported upright by the support stand means,

said support stand means including

a stand,

said stand having a pair of resilient clamping arms connected together by a back panel,

each said clamping arm having a facing surface,

a pair of legs extending downwardly from the clamping arms and flaring outwardly to a pair of feet,

middle cross bar means for connecting the middle portions of the legs together and for acting as a stop for a rear wall of the handle and setting a distance between the rear wall of the handle and said feet to hold the barrel at such an angle that said pipet tube mounted in the barrel is held with its admitting-emitting tip end being lower than the level of its connecting end so that any liquid in the tube does not flow back through the tube and into the pipet gun,

and a bottom cross bar connecting said feet together to give the legs stability,

the facing surface of each clamping arm including a ridge,

and a pair of grooves on the barrel for receiving and seating said ridges to connect the stand to the barrel.

8. A method of supporting a pipet gun in an upright position on a work table and holding a pipet tube so that it does not touch the work table, and holding the pipet tube at an attitude such that any liquid in the tube does not flow back through the tube and into the pipet gun, comprising

providing a pipet gun including a barrel extending from a handle with a rear wall,

providing a pipet gun stand means including a stand,

said stand having a pair of resilient clamping arms connected together by a back panel,

each said clamping arm having a facing surface,

a pair of legs extending downwardly from the clamping arms and flaring outwardly to a pair of feet,

middle cross bar means for connecting the middle portion of the legs together and for acting as a stop for a rear wall of the handle and setting the distance between the rear wall of the handle and said feet to hold the barrel at the proper angle so that any pipet tube mounted in the barrel is held with its admitting-emitting tip end being lower than the level of its connecting end so that any liquid in the tube does not flow back through the tube and into the pipet gun,

and a bottom cross bar connecting said feet together to give the legs stability,

mounting a pipet tube on the pipet gun, clamping the stand to the pipet gun by mounting the clamping arms onto the pipet gun barrel to form a pipet gun assembly,

placing the pipet gun assembly onto a top surface of a work table so that the pipet gun is upright an is supported by the stand and a heel of the pipet gun handle,

setting the distance between the rear wall of the handle and said feet,

holding the pipet tube at an attitude wherein the admitting-emitting tip end of the tube is below the level of the connecting end of the tube to prevent any liquid in the tube from flowing back through the tube into the gun,

and preventing contamination of the pipet tube by holding and positioning the pipet gun so that the pipet tube does not touch the work table.

9. A pipet gun stand for supporting a pipet gun in upright position on a work table and for holding a pipet tube mounted in the pipet gun so that the pipet tube does not touch the work table on which the pipet gun rests and for holding a pipet tube mounted in the pipet gun so that the pipet tube is pointed downwardly and has its admitting-emitting tip end lower than its connecting end for preventing any liquid in the pipet tube from flowing back through the pipet tube and into the pipet gun, comprising

a pair of resilient clamping arms connected together by a back channel,

each said clamping arm having a facing surface,

a pair of legs extending downwardly from the clamping arm and flaring outwardly to a pair of feet,

middle cross bar means connecting the middle portions of the legs together and for acting as a stop for a rear wall of the handle and for setting a distance between the rear wall of the handle and said feet to hold the barrel at such an angle that said pipet tube mounted in the barrel is held with its admitting-emitting tip end being lower than the level of its connecting end so that any liquid in the tube does not flow back to the tube and into the pipet gun,

and a bottom cross bar connecting said feet together to give the legs stability,

the facing surface of each clamping arm including a ridge adapted to seat in a pair of grooves on the pipet gun barrel to connect the stand to the barrel.