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EP-4735078-A2 - MODULAR DEVICE WITH SEAL AND ANTI-PREMATURE ROTATION FEATURE FOR ADJUSTABLE SEAL COMPRESSION AND INTERFERENCE FIT IN A PUMP

EP4735078A2EP 4735078 A2EP4735078 A2EP 4735078A2EP-4735078-A2

Abstract

A satellite module having at least one of a seal and an anti-premature rotation feature is provided for adjustable placement in the pump housing of a fluid delivery pump. The satellite module can have at least two separate pieces; that is, a piece with a seal and another piece with an anti-premature rotation feature. The satellite module can be a unitary member with a seal and an anti-premature rotation feature. A biasing component or a rigid component can be provided on the satellite module or pump housing to adjust distance from a fluid outlet hole in a sleeve and adjust compression on the seal.

Inventors

  • ABOUD, Danielle
  • HUGGARD, Elaine
  • MCDERMOTT, Conor
  • BEGUIN, Steve
  • COLEMAN, DAVID
  • FISHER, KATIE

Assignees

  • Becton, Dickinson and Company

Dates

Publication Date
20260506
Application Date
20240730

Claims (19)

  1. 1 . An insertable member for a pump housing of a metering pump, the pump housing having a main housing with at least one port therein that is connected to a fluid path of a pump, and a compartment configured to receive a sleeve therein, the sleeve having a fluid chamber therein and a side hole that can be aligned with the at least one port for fluid communication between the fluid chamber and the fluid path of the pump, the insertable member comprising: a body member with an aperture therein; and at least one leg extending from the body member: wherein the pump housing has at least one hole dimensioned to receive at least part of the leg of the body member, wherein the aperture is disposed on the body member to align with the at least one port of the pump housing when the leg is inserted into the hole in the pump housing.
  2. 2. An insertable member as recited in claim 1 , wherein a seal is provided between the side hole and the at least one port.
  3. 3. An insertable member as recited in claim 2, wherein the seal is provided in or at least adjacent to the at least one aperture in the body member.
  4. 4. An insertable member as recited in claim 2, wherein the seal is at least one of elastomeric, and overmolded on the body member with respect to the aperture.
  5. 5. An insertable member as recited in claim 2, wherein a selected compression of the seal is configured using selected positioning of the body member relative to the pump housing and the sleeve.
  6. 6. An insertable member as recited in claim 1 , wherein the body member has a first portion for seal adjustment, and a second portion with an anti-premature rotation member thereon for interference fit adjustment with respect to the sleeve.
  7. 7. An insertable member as recited in claim 8, wherein the first portion and the second portion of the body member comprise corresponding ones of a first piece and a second piece, the first piece being separate with respect to a second piece.
  8. 8. An insertable member as recited in claim 8, wherein the body member is a unitary piece.
  9. 9. An insertable member as recited in claim 1, wherein the pump housing is a formed as a single piece with a cavity therein that is configured to receive at least part of the sleeve.
  10. 10. An insertable member as recited in claim 1, wherein the pump housing is a formed from two pieces that define a cavity when combined, the cavity being configured to receive at least part of the sleeve.
  11. 11. An insertable member as recited in claim 10, wherein a seal is provided in or at least adjacent to the at least one aperture in the body member, and a selected compression of the seal is configured using selected positioning of the body member relative to the pump housing and the sleeve.
  12. 12. An insertable member as recited in claim 11 , wherein the seal is at least one of elastomeric, and overmolded on the body member with respect to the aperture.
  13. 13. An insertable member as recited in claim 11, the insertable member further comprising an additional member arranged between the two pieces of the pump housing to adjust distance between the sleeve and the pump housing to adjust compression on the seal.
  14. 14. An insertable member as recited in claim 13, wherein the additional member is chosen from a biasing component, a rigid component, a spring, and a shim.
  15. 15. An insertable member as recited in claim 1 , wherein the pump housing has a cavity configured to receive at least part of the sleeve, and a compartment with a surface facing the cavity and the sleeve when inserted in the pump housing, the compartment comprising a well dimensioned to receive at least part of insertable member, the well having a hole to receive at least parr of the leg, wherein dis rance of insertable member from the sleeve is adjusted by the amount of the length of leg that is inserted into the hole in the compartment.
  16. 16. An insertable member as recited in claim 1, wherein the insertable member has two opposite end portions with one end portion comprising the body member with the aperture, and another end portion comprising a detent between two depressions.
  17. 17. An insertable member as recited in claim 14, wherein the at least one port on the pump housing comprises two ports, the body member has a second aperture, the aperture and the second aperture are disposed on the body member to align with respective ones of the two ports of the pump housing when the leg is inserted into the hole in the pump housing, the side hole of the sleeve being controllably aligned with respective ones of the aperture and the second aperture during corresponding one of a discharge operation and an intake operation of the metering pump, the sleeve having an anti-premature rotation feature that cooperates with the detent and the depressions to prevent the sleeve from displacing the side hole away from the respective ones of the aperture and the second aperture until the corresponding one of the discharge operation and the intake operation is complete.
  18. 18. An insertable member as recited in claim 15, wherein the anti-premature rotation feature on the sleeve comprises a protruding member from an outer surface of the sleeve, the protruding member being aligned with the side hole along an axis of the sleeve that extends through the cavity of the pump housing, the depressions in the insertable member being dimensioned to at least partially receive the protruding member during a corresponding one of the discharge operation and the intake operation, and detent being dimensioned to prevent the protruding member from passing the detent and traveling to the other one of the two depressions until a selected amount of torque is provided on the sleeve.
  19. 19. An insertable member as recited in claim 18, wherein the pump housing has a keying hole therein that is dimensioned to receive the protruding member on the sleeve during the assembly, and wherein the sleeve is arranged after assembly to engage the protruding member with the detent and the depressions in the insertable member and prevent translational movement of the sleeve relative to the pump housing.

Description

MODULAR DEVICE WITH SEAL AND ANTI-PREMATURE ROTATION FEATURE FOR ADJUSTABLE SEAL COMPRESSION AND INTERFERENCE FIT IN A PUMP BACKGROUND Field: [0001] Illustrative embodiments relate generally to a fluid delivery' device, and more specifically to a satellite module for a pump assembly (e.g., an insertable member for a pump housing) having a seal and/or an anti-premature rotation feature for adjustable seal compression between a fluid outlet hole in a sleeve within a pump housing and a port in the pump housing, and/or adjustable interference fit of the anti-premature rotation feature with respect to the sleeve in the pump housing. Description of Related Art: [0002] FIGs 1 and 2 depict a pump assembly 4000 configured as a single block pump assembly with a pump housing and a manifold port seal as described in U.S. Patent No. 10,132,308, which is incorporated herein by reference in its entirety'. The pump assembly 4000 in FIGs 1 and 2 includes a sleeve 4002 having a helical groove 4004, a plug 4006, seals 4008, a plunger 4010, a coupling pin 4012, a pump housing 4014 with a manifold port seal indicated generally at 4016, and a flexible interlock 4018. The manifold port seal 4016 comprises a cannula port 4024 and a reservoir port 4026. For clarity purposes, a bottom part of the pump housing where the manifold port seal 4016 is located is removed in FIG. 1. [0003] The pump assembly 4000 can be connected to a DC motor and gearbox assembly (not shown) via the plunger 4010 to rotate and translate the plunger, and to rotate the sleeve 4002 during a valve state change, in the pump housing 4014, as described below. The helical groove 4004 is provided on the sleeve 4002. The coupling pin 4012 connected to the plunger 4010 translates along the helical groove 4004 to guide the retraction and insertion of the plunger 4010 within the sleeve 4002, respectively, as the plunger 4010 rotates in one direction and then rotates in the opposite direction. The pump assembly 4000 has an end plug 4006. Two seals 4008 on the respective ends of the plunger 4010 and the end plug 4006 that are interior to the sleeve 4002 define a cavity or chamber in the sleeve 4002 when the plunger 4010 is retracted following an intake stroke or aspirate operation and therefore ready to dispense. The volume of the chamber therefore changes depending on the degree of retraction of the plunger 4010. The volume of the chamber is negligible or essentially zero when the plunger 4010 is fully inserted and the seals 4008 are substantially in contact with each other following an output stroke or discharge operation and therefore ready to aspirate. The two ports 4024 and 4026 at the pump manifold seal 4016 include an inlet or reservoir port 4026 through which fluid (e.g., medication) can flow from a reservoir for the pump assembly, and an outlet or cannula port 4024 46 through which the fluid that has been drawn into the chamber (e.g., by retraction of the plunger 4010 during an aspirate stage of operation) can be dispensed from the chamber to, for example, a fluid path to a cannula in the patient by re-insertion of the plunger 4010 into the chamber. [0004] With continued reference to FIGs. 1 and 2, the sleeve 4002 is provided with an aperture or side part 4030 that aligns with the outlet port 4024 or the inlet port 4026 (i.e., depending on the degree of rotation of the sleeve 4002 and therefore the degree of translation of the plunger 4010 as d escribed below) to permit the fluid in the chamber of the sleeve to flow through the corresponding one of the ports 4024, 4026. [0005] In a starting position of an example pump cycle, the plunger 4010 is fully extended, the sleeve 4002 blocks the cannula port flow path at the cannula port 4028, and the reservoir port 4026 is open to the side port 4030 in the sleeve 4002, and a rotational limit sensor described below is engaged. As stated above, the sleeve 4002 includes a helical groove 4004 which receives the coupling pin 4012. Plunger 4010 is in sliding engagement with the sleeve 4002 such that as plunger 4010 rotates within the sleeve 4002 (e.g., by rotational force of the motor), coupling pin 4012 slides along helical groove 4004 to force the plunger 4010 to translate axially with reference to sleeve 4002. In the illustrated example, the helical groove 4004 is formed into sleeve 4002 to provides for 180° of rotation for coupling pin 4102 about the circumference of the sleeve 4002. Other degrees of rotation can be implemented using different dimensions for the helical groove 4004. [0006] During an intake operation, the DC motor turns the plunger 4010, which is driven (e.g., rotating and translating) along the helical groove 4004 of the sleeve 4002 via the coupling pin 4012. The plunger 4010 translates toward the DC motor, drawing fluid into the chamber defined in the sleeve 4002 by the seals 4008 and increasing the chamber volume. During the intake operation, friction between seal material provided at manifold port se