Disposable pumping system and coupler

• US 9,341,184 B2
• Filed: 01/12/2015
• Issued: 05/17/2016
• Est. Priority Date: 12/22/2009
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Dion, Ernest A., McLean, Ed, Boussu, Fred, Salinas, Manny J., Albert, Sean J.
• Primary Examiner(s): BERTHEAUD, PETER JOHN
• Application Number:
  US14/594,767
• Publication Number:
  US 20150122119A1
• Time in Patent Office: 491 Days
• Field of Search: 417/360, 417/415, 417/454, 417/569, 417/571, 604/228, 604/151, 604/152
• US Class Current: 1/1
• CPC Class Codes: A61B 17/3203 Fluid jet cutting instruments
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61M 5/14216 Reciprocating piston type
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: F04B 39/14 Provisions for readily assembling or disassembling
• CPC Class Codes: F04B 53/1002 Ball valves
• CPC Class Codes: F04B 53/144 Adaptation of piston-rods
• CPC Class Codes: F04B 53/147 Mounting or detaching of piston rod
• CPC Class Codes: F04B 53/22 Arrangements for enabling ready assembly or disassembly
• CPC Class Codes: F04B 7/00 Piston machines or pumps characterised by having positively-driven valving
• CPC Class Codes: Y10T 29/49815 Disassembling

Abstract

A coupling system for receiving a push rod includes a housing defining an internal channel having a sloped wall, and a piston received within the internal channel. The piston includes at least one flexible member arranged within the channel to be acted upon by the sloped wall to engage the push rod. The only external force required to couple the push rod is an axial force on the piston in a direction. The only external force required to de-couple the push rod is an axial force on the piston in an opposite direction.

Claims

1. A pump, comprising:

a pump housing configured for removable receipt by a drive console, the pump housing including an insert section, a coupling section and a handle, the insert section, coupling section and handle being linearly arranged with the coupling section between the insert section and the handle, the insert section configured to removably receive a push rod of the drive console, the coupling section including an external oval flange, the insert section defining a chamber;

a valve assembly located in the pump housing, the valve assembly including an inlet passage, an outlet passage, an inlet valve, and an outlet valve;

the inlet and outlet passages being in fluid communication with the chamber; and

a piston slidably received within the chamber.

2. The pump of claim 1 wherein the inlet passage and the outlet passage are located side-by-side in the pump housing.

3. The pump of claim 2 wherein the chamber is axially aligned with the inlet passage and the outlet passage.

4. The pump of claim 1 further comprising a fluid inlet line to the inlet passage and a fluid outlet line from the outlet passage.

5. The pump of claim 1 wherein the chamber has a sloped wall.

6. The pump of claim 5 wherein the piston includes at least one flexible member arranged within the chamber to be acted upon by the sloped wall to engage the push rod.

7. The pump of claim 6 wherein the chamber includes a region within which the piston is configured to reciprocate while the flexible member is engaged with the push rod.

8. The pump of claim 6 wherein the flexible member is outwardly biased.

9. The pump of claim 6 wherein a plurality of flexible members are arranged within the chamber, each of which is arranged within the chamber to be acted upon by the sloped wall to collectively engage the push rod.

10. The pump of claim 9 wherein each of the plurality of flexible members is outwardly biased.

11. The pump of claim 1 wherein the chamber is funnel shaped.

12. The pump of claim 1 further comprising a restraining member protruding into the chamber to maintain the piston within the chamber.

13. The pump of claim 1 wherein the piston includes at least one flexible member configured to couple and de-couple the push rod, wherein the only external force required to couple the push rod is an axial force on the piston in a first direction, and the only external force required to de-couple the push rod is an axial force on the piston in a second direction opposite the first direction.

14. The pump of claim 1 wherein the inlet valve comprises a ball valve and the outlet valve comprises a ball valve.