Patent Description:
Refrigeration systems (e.g., air-conditioning (A/C) systems) typically include a liquid or gaseous refrigerant that is used for cooling. Servicing a refrigeration system (for example, an automobile refrigerant system, a residential refrigerant system, or a commercial refrigeration system) often includes charging the system with a refrigerant (for example, halogenated hydrocarbons, and/or other coolants). In the case of charging an automobile refrigerant system, a pressurized refrigerant source, such as an aerosol can of refrigerant, connects via a hose to a low-pressure port of refrigerant lines carrying refrigerant within the system. While connected, the refrigerant may expel from the refrigerant source and is injected or drawn into the refrigerant lines. Refrigerant may be added until the desired amount of refrigerant is achieved in the system.

After market servicing of air conditioners is conventionally done by owners of vehicles commonly known as the "do-it-yourself" or the DIY market. A common technique for adding a relatively small quantity of refrigerant (for example, a can of refrigerant) to a refrigerant circuit of an air conditioning system, is to interconnect a charging hose assembly between a suction line service fitting on the refrigerant circuit and a small canister filled with pressurized refrigerant, and then flow at least some of the refrigerant from the canister into the circuit during operation of the system.

In most conventionally manufactured version thereof, the valve used to regulated the flow of refrigerant is either capable of opening a self-sealing valve of a refrigerant can and/or is a piercing dispensing shut-off valve connected to one of a hose and a disconnect coupler fitting connect to the opposite end of the hose. To use the charging hose assembly, the shut-off valve is screwed onto a cylindrical outlet portion of the canister, and the coupler fitting is releasably locked onto the service fitting. When this is done, a fixed pin member within the coupler fitting depresses a corresponding opening pin within the service fitting to communicate the interior of the refrigerant circuit with the interior of the charging hose.

Next, the vehicle's engine is started, and the air conditioning system is operated in its maximum cooling mode. A handle on the installed shut-off valve of the charging device is then rotated in a first direction to cause an associated valve stem portion of the valve to pierce the outlet portion of the canister, and then the handle is rotated in the opposite direction to open the valve to allow fluid communication between the canister and the automobile refrigerant system.

To terminate the refrigerant charging process, the handle of the shut-off valve is rotated in the first direction to close the shut-off valve and thereby block the flow through the hose of any pressurized refrigerant remaining in the canister. The disconnect coupler fitting is then removed from the refrigerant circuit service fitting. If the canister has been completely emptied of refrigerant in this process, the shut-off valve is then removed from the canister and empty canister is discarded.

Many apparatus have been designed to allow the consumer to add refrigerant as needed to refrigerant systems. For example, <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>, <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; <CIT>; and <CIT>; <CIT>; <CIT>; <CIT>, and <CIT>, all of which are incorporated herein by reference as fully set forth herein, describe various apparatus that may allow a consumer to add refrigerant as needed and/or to measure the refrigerant pressure in an automobile air conditioner during the addition of the refrigerant. These devices, however, may be cumbersome for the consumer to use, as they may require the use of two hands to manage the dispensing of refrigerant from the canister. Thus, less cumbersome and more ergonomic refrigerant systems are desired.

<CIT> describes refrigerant charging systems and methods of use. In <CIT>, a refrigerant charging system may include a conduit, a valve releasably connectable to the outlet portion and coupled to a first end of the conduit; and a disconnect coupler fitting connected to a second end of the conduit. The disconnect coupler fitting of <CIT> may include a control structure positioned in a hollow body that, during use, allows refrigerant flow to the refrigerant circuit. In <CIT>, the control structure may include one or more openings that allow controlled leakage of fluid from the refrigerant charging assembly when the refrigerant charging assembly is disconnected from at least the refrigerant service unit.

<CIT> describes an apparatus, system and method for servicing a coolant system, such as, an automobile air conditioner are disclosed. In one embodiment, the apparatus may comprise a device for measuring a parameter of the coolant system; and means for selectively switching between providing: (i) communication between the coolant system and said measuring device, and (ii) communication between the coolant system and the coolant supply. Moreover, <CIT>, <CIT> and <CIT> disclose a device according to the preamble of claim <NUM> for servicing a refrigerant system and correspondingly a method according to the preamble of claim <NUM> of servicing a refrigerant system.

The present disclosure provides many advantages, which shall become apparent as described below.

The present invention provides a device as defined in claim <NUM> and a method as defined in claim <NUM>.

Methods, systems, and devices for servicing a refrigeration system are described herein. The device for servicing a refrigerant system includes a body and an actuator. The body includes a first fluid port that is coupleable to a fluid port of a fluid source; a second fluid port, that operatively couples to a refrigeration system; a passage in fluid communication with the first and second fluid ports and in fluid communication; and a plunger at least partially disposed in the passage of the body, and the plunger is adjustable between a released position and an engaged position, during use. The actuator is coupled to the body, and, during use, downward movement and rotation of the actuator engages the plunger such that substantially continuous fluid communication between the first fluid port and the second fluid port is established. In some embodiments, the fluid source is configured to be hand-held and the downward movement and rotation of the actuator is performed by a portion of the hand that is holding the fluid source.

The method of servicing a refrigeration system includes providing a first fluid port of a servicing device to a fluid port of a fluid source; providing a second fluid port of the servicing device to a fluid port of a refrigeration system, wherein a portion of a plunger of the servicing device seals the second fluid port; contacting a piercing member of the servicing device with a seal a fluid source to open the fluid source; providing the fluid source to a first portion of a hand of a user; and actuating a lever of the servicing device with second portion of the hand to move the plunger such that fluid communication between the refrigeration system the fluid source is established.

In some embodiments, kits that include apparatus and/or devices for servicing refrigeration systems are described herein.

In further embodiments, additional features may be added to the specific embodiments described herein.

Further objects, features and advantages of the present disclosure will be understood by reference to the following drawings and detailed description.

The present invention will be better understood and other advantages will appear on reading the detailed description of some embodiments taken as nonlimiting examples and illustrated by the following drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the drawing and detailed description thereto are not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications and alternatives falling within the scope of the present invention as defined by the appended claims.

It is to be understood that the present invention is not limited to particular devices or methods, which may, of course, vary. It is also to be understood that the terminology used herein is for describing particular embodiments only, and is not intended to be limiting. As used in this specification and the appended claims, the singular forms "a", "an", and "the" include singular and plural referents unless the content clearly dictates otherwise. Thus, for example, reference to "a fluid" may include a combination of two or more fluids. Furthermore, the word "may" is used throughout this application in a permissive sense (i.e., having the potential to, being able to), not in a mandatory sense (i.e., must). The term "include," and derivations thereof, mean "including, but not limited to. " Terms relating to orientation, such as "upper", "lower", "top", "bottom", "left", or "right", are used for reference only; the device herein may be used in any orientation. The order of any method may be changed, and various elements may be added, reordered, combined, omitted, modified, etc..

"Bias member" refers to any member of the system, device, or apparatus that exerts a force in a particular direction(s).

"Body" refers to any physical structure capable of at least partially supporting another object. A body may have various regular or irregular shapes. For example, portions of a body may be straight, curved, or a combination of both.

"Charging" refers to both charging and recharging of a system. Charging a system may include initially filling a unit with fluid (for example, refrigerant). Recharging may refer to adding fluid to a unit that has some fluid in the unit. Recharging may be performed after a portion of the fluid has leaked out of the unit or the pressure/amount of the fluid has dropped below a desirable level. It will be appreciated that charging and recharging are often used interchangeably.

"Coupled" means either a direct connection or an indirect connection (e.g., one or more intervening connections) between one or more objects or components. The phrase "directly connected" means a direct connection between objects or components such that the objects or components are connected directly to each other so that the objects or components operate in a "point of use" manner.

"Coupling element" refers to any physical structure or combination of structures capable of releasably or permanently connecting two objects. Examples of a coupling element include, but are not limited to, a hook, a clip, a clasp, mating threads, one or more members of an interference fitting, one or more members of a welded joint, one or more members of a quick coupling joint, and any combination of such elements.

"Fluid" refers to a liquid, gas, vapor, or a mixture thereof.

"Member" refers to a constituent part of a system. A member may include a plate, link, rod, or other structure of various sizes, shapes, and forms. A member may be a single component or a combination of components coupled to one another. A member may have various regular or irregular shapes. For example, portions of a member may be straight, curved, or a combination of both.

"Opening" refers to an aperture, such as a hole, gap, slit, or slot.

In some embodiments, a servicing device is connected to a fluid source and a fluid receiving system. The fluid source may include a self-sealing valve. The servicing device is capable of allowing fluid communication between the fluid source and the fluid receiving system. The servicing device may include a plunger that is capable of engaging the self-sealing valve. Use of a servicing device that couples directly to a fluid source and engages with a self-sealing valve may eliminate the need for adaptors used to adapt conventional valves to refrigerant containers having integrated valves. In some embodiments, the servicing device is capable of being locked in an open position during use.

In some embodiments, the servicing device includes a measuring device. The servicing device may allow fluid communication between the measuring device and the fluid receiving system while inhibiting fluid communication between the fluid source and the measuring device and/or the fluid receiving system.

<FIG> is a perspective side view of an embodiment of a fluid routing system. Fluid routing system <NUM> may include one or more valves, hoses, pressure gauges, check valves, flexible or rigid conduits, adapters, or combinations thereof. Fluid routing system <NUM> includes fluid source <NUM>, servicing device <NUM>, fluid transfer member <NUM>, and fluid receiving system <NUM>. Fluid source <NUM> may be coupled to fluid receiving system <NUM> via servicing device <NUM> and fluid transfer member <NUM>. As shown, fluid source <NUM> is connected to servicing device <NUM>, the servicing device is connected to fluid transfer member <NUM>, and the fluid transfer member is connected to fluid receiving system <NUM>.

In some embodiments, fluid routing system <NUM> is capable of transferring fluid from fluid source <NUM> to fluid receiving system <NUM>. For example, fluid source <NUM> may have an internal pressure sufficiently greater than that of fluid receiving system <NUM> such that fluid flows from the fluid source to the fluid receiving system. In certain embodiments, a refrigerant may be added to a refrigeration system using one or more components of fluid routing system <NUM>.

Fluid source <NUM> may include a volume of hydrocarbons, halogenated hydrocarbons, or mixtures thereof. In some embodiments, fluid source may include ammonia and/or water. Halogenated hydrocarbons include, but are not limited to, fluorinated hydrocarbons, chlorinated, fluorinated hydrocarbons, fluorinated ethers, <NUM>,<NUM>,<NUM>,<NUM>-tetrafluorprop-<NUM>-ene (HF0-1234yf), <NUM>,<NUM>,<NUM>,<NUM>-tetrafluorethane, dichlorodifluoromethane, or mixtures thereof. Commercially available fluid sources include, but are not limited to, HF0-1234yf refrigerants (for example, Genetron <NUM> (Honeywell, USA), OpteonTM (DuPontTM, USA), R-134a, R-<NUM>, or the like. In some embodiments, fluid source <NUM> may also include other suitable chemicals including, but not limited to, dyes and/or system lubricants.

Fluid source <NUM> may be any suitable shape or size and/or may be composed of one or more suitable materials. Fluid source <NUM> may have a shape that is easily grasped by a human hand, sufficient size to contain a desired volume of fluid; and/or may be composed of a material having sufficient mechanical properties to withstand the static force of a pressurized fluid.

In certain embodiments, fluid source <NUM> is a portable container. A portable container includes, but is not limited to, a can, a cylinder, or a reservoir that is easily handled by a user. In some embodiments, fluid source <NUM> includes, but is not limited to, a stationary reservoir, such as a large tank or similar container. Fluid source <NUM> may be pressurized or, in some embodiments, under a vacuum. In some embodiments, fluid source <NUM> is at atmospheric pressure. In an embodiment, fluid source <NUM> is an aerosol container of R-134a refrigerant or HFO1234fy refrigerant. Fluid source <NUM> may include an integrated valve or a seal that requires puncturing in order to be opened. In some embodiments, fluid routing system <NUM> may alternatively, or additionally, be configured to transfer fluid from fluid receiving system <NUM> to fluid source <NUM>.

Fluid transfer member <NUM> may include fluid transfer body <NUM>. Fluid transfer body <NUM> may include any device or structure capable of supporting fluid flow. For example, fluid transfer body <NUM> may include, but is not limited to, one or more flexible or rigid hoses, one or more conduits, pipe, tube, and the like. For example, a hose with appropriate couplings connects to servicing device <NUM> and an inlet of a refrigeration system. Fluid transfer body <NUM> may include openings of any suitable shape or size to allow pressurized fluid to enter and/or exit the fluid transfer body at a desired rate of flow. An end of fluid transfer body <NUM> may include a coupling element (not shown) at least substantially complementary to a coupling element of servicing device <NUM>. In some embodiments, a total length of the fluid transfer body <NUM> is about twelve inches, about ten inches or about eight inches.

As shown in <FIG>, measuring device <NUM> is positioned in between two portions of fluid transfer body <NUM>. Measuring device <NUM> may provide fluid property readings (for example, temperature and/or pressure readings, etc.) in connection with the fluid flowing through or suspended in the refrigerant system <NUM>. For example, measuring device <NUM> may provide fluid property readings in connection with fluid receiving system <NUM>. In certain embodiments, measuring device <NUM> may provide fluid property readings in connection with fluid source <NUM>. In some embodiments, measuring device <NUM> includes markings that indicate, based on the pressure of the refrigerant system, if the refrigerant system requires refrigerant. In some embodiment, measuring device <NUM> is not present and fluid transfer body <NUM> is one conduit (hose).

An opposite end of fluid transfer body <NUM> may be coupled to a fluid port of fluid receiving system <NUM>. In some embodiments, an end of fluid transfer body <NUM> includes a coupling element for coupling fluid transfer member <NUM> to an external device or structure. As shown, fluid transfer body includes quick coupling member <NUM>. Quick coupling member <NUM> may be at least substantially complementary to a quick coupling member of fluid receiving system <NUM>.

Fluid receiving system <NUM> may include, but is not limited to, an automobile refrigerant system, a residential refrigerant system, a commercial refrigeration system, or the like. In some embodiments, fluid receiving system <NUM> is an automobile refrigerant system. The automobile refrigerant system may include an automobile air-conditioning (A/C) system. In some embodiments, a refrigeration system may include an evaporator, condenser, and compressor that circulates refrigerant to cool or otherwise transfer/remove heat from the respective environment.

Adding of fluid to fluid receiving system <NUM> may charge or recharge the unit. In some embodiments, fluid routing system <NUM> is used to charge or recharge a refrigeration system (for example, charging an automobile refrigeration system using a can of refrigerant).

Fluid source <NUM> may include fluid source port <NUM>. Fluid source port <NUM> may function as an inlet and/or an outlet. Fluid source port <NUM> may be an externally threaded cylindrical outlet having a top end wall <NUM>. Top end wall <NUM> may include a seal that is capable of being pierced and/or punctured.

In some embodiments, fluid source port <NUM> is coupled to an adapter, valve, servicing device, hose, or the like. In certain embodiments, fluid source port <NUM> is coupled to a fluid port of servicing device <NUM>. The coupling between fluid source port <NUM> and the fluid port of servicing device <NUM> may be least substantially fluid tight. That is, little, or no, fluid may be allowed to escape fluid routing system <NUM> through the coupling of fluid source port <NUM> and the fluid port of servicing device <NUM>. Fluid source port <NUM> may permanently or temporarily couple to a fluid port of servicing device <NUM>.

<FIG> depict embodiments of servicing device <NUM>. <FIG> is an exploded cross sectional side view of an embodiment of servicing device <NUM>. <FIG> is a perspective view of an embodiment of a plunger of servicing device <NUM>. <FIG> is a perspective view of an embodiment of an actuator of servicing device <NUM>. <FIG> is a perspective side view of an embodiment of a plunger and actuator of servicing device <NUM> assembled. <FIG> is a perspective top view of an inside of an embodiment of a coupling member of servicing device <NUM>. <FIG> depicts a perspective bottom view of coupling element <NUM>.

Servicing device <NUM> may include actuator <NUM>, coupling member <NUM>, plunger <NUM>, and servicing device body <NUM>. Actuator <NUM> may be permanently or releasably coupled to plunger <NUM>. Actuator <NUM> may include cam <NUM>, handle <NUM>, and coupling element <NUM>. Cam <NUM> may allow handle <NUM> to move downward when actuated and upward when released. For example, move downward when pressed by a user and upward when released.

Handle <NUM> may include stop <NUM> and gripping elements <NUM>. Stop <NUM> may allow a user to rest a portion of their hand (for example, a thumb or finger) on the handle <NUM> to facilitate actuation of handle <NUM>. Gripping elements <NUM> may facilitate gripping of handle <NUM>. Actuator <NUM> may include any other physical features (for example, ridges, non-slip coating, etc.) that facilitate gripping and/or handling. In some embodiments, actuator <NUM> does not include gripping elements <NUM> or stop <NUM>. Handle <NUM> may also include lettering or symbols to provide instruction on how to operate actuator <NUM>. For example, handle <NUM> may include the words "Push to Charge".

Coupling element <NUM> may couple actuator <NUM> to plunger <NUM>. For example, coupling element <NUM> may include a set of interior threads arranged in a selected thread pattern. The coupling element of actuator <NUM> is at least substantially complementary to coupling element <NUM> of plunger <NUM>. Actuator <NUM> may be directly coupled, releasably coupled, or an integral part of plunger <NUM>. For example, the set of interior threads of actuator <NUM> may be at least substantially complementary to exterior threads of plunger <NUM>. During use, actuator <NUM> may be utilized to actuate servicing device <NUM>. In some embodiments, coupling element <NUM> is a bore complementary in size to the outer diameter of plunger <NUM>. Plunger <NUM> may be inserted into coupling element <NUM> and directly coupled to actuator <NUM>. For example, the plunger may be welded, epoxied, press fit, or the like after insertion in coupling element <NUM>. Plunger <NUM> includes coupling element <NUM>, plunger body <NUM>.

Servicing device body may include bore <NUM>, opening <NUM>, coupling element <NUM>, first fluid port <NUM>, and second fluid port <NUM>. Servicing device body <NUM> may be any suitable shape or size. As shown, servicing device body <NUM> has an elongated, irregular shape. In some embodiments, at least one of the fluid ports may be coupled to fluid source port <NUM> of fluid source <NUM>.

Opening <NUM> may be any suitable shape or size. In some embodiments, opening <NUM> is at least of sufficient size to receive plunger <NUM>. As shown, opening <NUM> is at least substantially circular, having a diameter of sufficient size to receive the body of plunger <NUM> and radial protrusion <NUM> of plunger <NUM>. In some embodiments, opening <NUM> extends at least substantially in an axial direction through servicing device body <NUM>.

As shown in <FIG>, coupling element <NUM> includes exterior threads <NUM>, annular shoulder <NUM>, annular grooves <NUM>, and slot <NUM>. Coupling element <NUM> may be permanently or releasably coupled to coupling member <NUM> with exterior threads <NUM>. Threads <NUM> may be arranged in a selected pattern. In some embodiments, coupling element <NUM> is at least substantially complementary to coupling member <NUM>. For example, threads <NUM> of are at least substantially complementary to a set of interior threads of coupling member <NUM>.

Annular grooves <NUM> may be any suitable shape or size. In some embodiments, annular grooves <NUM> are at least of sufficient size to receive radial protrusion <NUM> of plunger body <NUM>. In some embodiments, radial protrusion <NUM> may be displaced angularly within annular grooves <NUM>. For example, axial rotation of plunger <NUM> may alter the angular position of radial protrusion <NUM> within annular groove <NUM> during use. The angular position of the radial protrusion may be at least <NUM> degrees, at least <NUM> degrees, or at least <NUM> degrees relative to the vertical axis of the plunger. Annular grooves <NUM> may be spaced about <NUM> degrees apart, however, other spacing is contemplated. In some embodiments, annular grooves <NUM> and radial protrusion <NUM> are not necessary.

Plunger <NUM> may be adjustable between a released position and an engaged position. In some embodiments, when plunger <NUM> is adjusted to the engaged position, radial protrusion <NUM> moves through slot <NUM> and inserts in groove <NUM> and fluid communication is free flowing between first fluid port <NUM> and second fluid port <NUM>. In some embodiments, when plunger <NUM> is released (for example, moving plunger <NUM> in downward motion), radial protrusion <NUM> moves freely inside of bore <NUM>. The amount of fluid communication between first fluid port <NUM> and second fluid port <NUM> may be regulated by positioning radial protrusion <NUM> in various positions of bore <NUM>. For example, if radial protrusion <NUM> is positioned above second fluid port <NUM>, fluid will flow continuously from first fluid port <NUM> and the second fluid port. If radial protrusion <NUM> is positioned in or below second fluid port <NUM>, flow of fluid may be slowed or inhibited.

Referring to <FIG>, coupling element <NUM> may be affixed or an integral part of servicing device body <NUM>. Coupling element <NUM> may have an outer diameter that is less than the outer diameter of the servicing device body. Bore <NUM> may extend at least substantially in an axial direction through the interior of coupling element <NUM>, servicing device body <NUM>, and first fluid port <NUM>. Bore <NUM> may include a passage of any suitable shape or size. In some embodiments, bore <NUM> is at least of sufficient size to receive at least a portion of plunger <NUM>. As shown, bore <NUM> is at least substantially cylindrical having a diameter at least slightly larger than the diameter of the body of plunger <NUM>. A diameter of bore <NUM> may be reduced as the bore enters fluid port <NUM>. Such a reduction may form neck <NUM>. Neck <NUM> may assist in directing flow into valve body <NUM> from fluid source <NUM>.

Bore <NUM> may be in fluid communication with second fluid port <NUM> via passage <NUM>. Second fluid port <NUM> may function as an inlet and/or an outlet. For example, second fluid port <NUM> may allow fluid to enter and/or exit servicing device body <NUM>. Passage <NUM> may be any suitable shape or size. As shown, passage <NUM> is at least substantially cylindrical.

Second fluid port <NUM> may include coupling element <NUM>. Coupling element <NUM> may be configured to couple servicing device <NUM> to an external device or structure. Servicing device <NUM> may be permanently or releasably coupled to fluid transfer member <NUM>. In some embodiments, coupling element <NUM> is at least substantially complementary to a coupling element of fluid transfer member <NUM>. For example, coupling element <NUM> may include an interior surface weldable to an exterior surface of fluid transfer member <NUM>. In some embodiments, coupling element <NUM> may be threads in passage <NUM> that are complimentary to one or more coupling members (for example, a hose fitting, and/or adaptor).

Bore <NUM> may be in fluid communication with first fluid port <NUM>. First fluid port <NUM> may function as an inlet and/or an outlet. For example, first fluid port <NUM> may allow fluid to enter and/or exit servicing device body <NUM>. First fluid port <NUM> may include bore <NUM> and coupling element <NUM>. Bore <NUM> may be any suitable shape or size. Bore <NUM> may have a diameter of sufficient size to allow pressurized fluid to enter and/or exit servicing device body <NUM> at a desired rate of flow. Bore <NUM> may have a tapered end configured to break a seal of a fluid source by piercing a hole in the seal. In some embodiments, the taper end may be sharp. For example, the tapered end may be used for piercing a hole in a seal of a refrigerant container having a <NUM>/<NUM> inch ACME can thread type top.

Coupling element <NUM> may be configured to couple servicing device <NUM> to an external device or structure. Servicing device <NUM> may be permanently or releasably coupled to fluid source port <NUM> with coupling element <NUM>. For example, coupling element <NUM> may include threads that are complementary to fluid source port <NUM>.

Plunger body <NUM> may be any suitable shape or size. For example, plunger body <NUM> may be at least substantially cylindrical. In some embodiments, plunger body <NUM> is at least partially disposed in bore <NUM> of servicing device body <NUM>. Plunger body <NUM> may be inserted through opening <NUM> such that at least a portion of the plunger body is disposed in bore <NUM>. The dotted lines in <FIG> indicate how plunger <NUM> fits in servicing device <NUM>. The diameter of plunger body <NUM> may be at most slightly less than the diameter of bore <NUM> such that an annulus is formed between an outer surface of the plunger body and an inner surface of the bore. The annulus may be in fluid communication with fluid receiving system <NUM> and fluid source <NUM>. In some embodiments, a fluid may flow in a substantially axial direction through the annulus. Fluid may flow from fluid source <NUM> through bore <NUM> and then to fluid receiving system <NUM>.

A portion of plunger <NUM> includes, groove <NUM>, stop <NUM>, and end <NUM>. Groove <NUM> separates stop <NUM> from plunger body <NUM>. Gasket <NUM> may be inserted into groove <NUM> to form a seal. Plunger stop <NUM> may abut neck <NUM> when actuator <NUM> is in a released position. When plunger stop <NUM> abuts neck <NUM>, protrusion <NUM> is aligned with passage <NUM> of second fluid port <NUM> and fluid communication between first fluid port <NUM> and second fluid port <NUM> is inhibited. End <NUM> may extend into bore <NUM>. End <NUM> holds and aligns a biasing member (not shown) that provides resistance when pushing down on actuator <NUM>. In some embodiments, biasing member is a spring.

After plunger <NUM> is inserted in servicing device body <NUM>, coupling member <NUM> may be used to inhibit the unintentional release of fluid and/or plunger <NUM> from servicing device body <NUM>. Coupling member <NUM> may include any suitable components, for example gaskets. As shown, coupling member <NUM> includes nut <NUM> shown in <FIG>.

In some embodiments, servicing device <NUM> may be assembled by inserting plunger <NUM> in servicing device body <NUM> and tightening nut <NUM> of coupling member <NUM> to coupling element <NUM> of servicing device body <NUM>. Plunger <NUM> may be then coupled to actuator <NUM>. Movement of actuator <NUM> may move plunger <NUM> to released, engaged, or locked position.

In some embodiments, plunger <NUM> may be a locked in an open position. Plunger <NUM> may be in a locked position when axial movement of the plunger is at least partially inhibited. Plunger <NUM> may be inhibited or be at least substantially inhibited when radial protrusion <NUM> is moved out of alignment with groove <NUM>. For example, when radial protrusion <NUM> is pushed in slot <NUM> and then rotated into annular groove <NUM>. Positioning of protrusion <NUM> in annular groove <NUM> holds plunger <NUM> in an open position. Adjusting plunger <NUM> from an unlocked position to a locked position may include exerting torque on plunger <NUM> when radial protrusion <NUM> is disposed in annular groove <NUM>, such that the radial protrusion is moved out of alignment with slot <NUM>.

To couple service device <NUM> to fluid source <NUM>, actuator <NUM> may be in a released (non-charging) position. In the released position, stop <NUM> abuts neck <NUM>. Coupling element <NUM> may be threaded onto fluid source port <NUM> and tapered end of bore <NUM> may pierce top wall <NUM> of the fluid source to open fluid source <NUM>. As refrigerant flows from fluid source into bore <NUM>, pressure is applied to actuator <NUM> to position the actuator in a charging position (for example, pushing handle <NUM> downward). Such pressure moves plunger <NUM> upward in bore <NUM> to allow fluid to flow into the bore. As plunger <NUM> moves past passage <NUM> of second fluid port <NUM>, fluid flow is established between the first fluid port and the second fluid port. By adjusting actuator <NUM>, fluid flow from first fluid source <NUM> through servicing device <NUM>, and then to fluid receiving system <NUM> is regulated. In some embodiments, the plunger end <NUM> and/or plunger body <NUM> are hollow. In some embodiments, plunger end <NUM> is tapered and sufficiently sharp to pierce a seal of fluid source <NUM>.

In some embodiments, servicing device <NUM> may be connected to fluid source <NUM> and to fluid receiving system <NUM> (see, for example, <FIG>). When attached to fluid source <NUM> and fluid receiving system <NUM> servicing device <NUM> may be in a locked or released position. Fluid source <NUM> may be held in a user's hand (for example, in a palm of the user's hand). In the released position, plunger <NUM> may move freely through bore <NUM> when pressure is applied to actuator <NUM>. Actuator <NUM> may be pushed using a portion of the hand that is holding the fluid source (for example, using a thumb or finger of the hand). In some embodiments, when actuator <NUM> is moved downward (charging position), plunger <NUM> moves upward through bore <NUM> until protrusion <NUM> aligns with slot <NUM>. Once aligned with slot <NUM>, actuator <NUM> is rotated with the same hand until protrusion <NUM> moves through slot <NUM> into groove <NUM> to lock plunger <NUM>. Thus, the user is able to hold fluid source <NUM> and to operate regulate flow of refrigerant with the same hand.

In some embodiments, servicing device <NUM> may be adapted to allow measurement of one or more parameters of the receiving system while inhibiting communication between the fluid source port and the measuring system or the fluid source port and the receiving system. Inhibiting communication to the fluid source allows the servicing device to be used to measure one or more parameters of the receiving system (for example, a refrigeration system such as an automobile refrigeration system) prior to attaching the servicing device to the fluid source (for example, a refrigerant cylinder). For example, when actuator <NUM> is in a non-charging position, gasket <NUM> of plunger <NUM> seals bore <NUM> and first fluid port <NUM>, thus a pressure of the refrigerant system using measuring device <NUM> may be obtained using servicing device <NUM>.

<FIG> is a perspective side view of an embodiment of a fluid routing system with another servicing device <NUM>. <FIG> depict perspective views of servicing device <NUM> shown in <FIG>. <FIG> depicts a cross-sectional view of servicing device <NUM>. <FIG> depicts a perspective view of plunger body <NUM>. <FIG> depicts a bottom view of servicing device <NUM> without service device body <NUM> and coupling element <NUM>. Servicing device <NUM> may include actuator <NUM>, coupling element <NUM>, coupling element <NUM>, plunger <NUM>, and servicing device body <NUM>. Actuator <NUM> may be permanently or releasably coupled to plunger <NUM>.

Coupling element <NUM> includes exterior threads <NUM>. Coupling element <NUM> may be permanently or releasably coupled to coupling member <NUM> with exterior threads <NUM>. Threads <NUM> may be arranged in a selected pattern. In some embodiments, coupling element <NUM> is at least substantially complementary to coupling member <NUM>. For example, threads <NUM> of are at least substantially complementary to a set of interior threads of coupling member <NUM>. Servicing device body and coupling elements <NUM> and <NUM> are the same as described in <FIG>.

Actuator <NUM> may include pin <NUM> and lever <NUM>. Cam <NUM> may allow lever <NUM> to move downward when actuated and upward when released. For example, move downward when pressed by a user and upward when released.

Plunger <NUM> includes plunger body <NUM>, ridges <NUM>, grooves <NUM> and opening <NUM>. As shown, plunger body is cylindrical in shape, however, any shape that is complementary to bore <NUM> may be used. End <NUM> of plunger body <NUM> may abut neck <NUM> when lever <NUM> is in a released position. Ridges <NUM> may have the same or different widths or areas. The width of ridges <NUM> may be complementary to the width of various portions of bore <NUM>. Ridges <NUM> may be spaced apart to form grooves <NUM>. Grooves <NUM> may hold gaskets (not shown). Gaskets positioned in grooves <NUM> may assist in aligning plunger body <NUM> in bore <NUM> (shown in <FIG>).

End <NUM> may form a seal in bore <NUM>. End <NUM> may be made any material that allows a seal in bore <NUM> to be formed. For example, end <NUM> may be made of metal, rubber or a plastic material. Forming a seal in bore <NUM> may inhibit premature release of fluid from second fluid port <NUM> and/or assist in regulating flow of fluid through the bore. For example, when lever <NUM> is in an actuated (charging) position, end <NUM> may be above first fluid port <NUM> and second fluid port <NUM> (shown in <FIG>) of servicing device <NUM> to establish fluid communication in the fluid routing system. Movement of actuation of lever <NUM> to a partial charging position plunger <NUM> moves upward or downward through bore <NUM> of servicing device <NUM> and end <NUM> moves past second fluid port <NUM> to allow fluid to flow to the fluid port.

Opening <NUM> has a shape complementary to pin <NUM>. Insertion of pin <NUM> into opening <NUM> connects lever <NUM> to plunger <NUM>. Pin <NUM> may be welded, epoxied and/or otherwise affixed in opening <NUM>. Connection of lever <NUM> to plunger <NUM> allows actuation of plunger <NUM> during use.

To couple service device <NUM> to fluid source <NUM>, actuator <NUM> may be in a released (non-charging) position. In the released position, plunger end <NUM> abuts neck <NUM> in service device bore <NUM>. Coupling element <NUM> may be threaded onto fluid source port <NUM> and tapered end of bore <NUM> may pierce top wall <NUM> of the fluid source to open fluid source <NUM>. Fluid source <NUM> may be positioned in a user's hand. As refrigerant flows from fluid source into bore <NUM>, pressure is applied to lever <NUM> to position the actuator in a charging position (for example, downward). In some embodiments, the pressure is applied using a portion of the hand (for example, a thumb or finger of the hand) that is holding the fluid source. Such pressure moves plunger <NUM> upward in bore <NUM> to allow fluid to flow into the bore. As plunger end <NUM> move past passage <NUM> of second fluid port <NUM>, fluid flow is established between the first fluid port and the second fluid port. By adjusting lever <NUM>, fluid flow from first fluid source <NUM> through servicing device <NUM>, and then to fluid receiving system <NUM> is regulated. In some embodiments, the plunger end <NUM> and/or plunger body <NUM> are hollow. In some embodiments, plunger end <NUM> is tapered and sufficiently sharp to pierce a seal of fluid source <NUM>.

In some embodiments, servicing device <NUM> may be adapted to allow measurement of one or more parameters of the receiving system while inhibiting communication between the fluid source port and the measuring system or the fluid source port and the receiving system. Inhibiting communication to the fluid source allows the servicing device to be used to measure one or more parameters of the receiving system (for example, a refrigeration system such as an automobile refrigeration system) prior to attaching the servicing device to the fluid source (for example, a refrigerant cylinder). For example, when actuator <NUM> is in a non-charging position, gaskets of plunger <NUM> seals bore <NUM> and first fluid port <NUM>, thus a pressure of the refrigerant system using measuring device <NUM> may be obtained using servicing device <NUM>.

In some embodiments, servicing device <NUM> includes a biasing member <NUM>. In some embodiments, biasing member is a spring. Use of a biasing member provides tension when applying pressure to lever <NUM> of actuator <NUM>. The biasing member also assists in moving actuator <NUM> back to a released position when lever <NUM> is released. In some embodiments, actuator <NUM> in <FIG> is used instead of actuator <NUM> in <FIG> and <FIG>.

It is contemplated that other suitable means for providing an actuating force to the valve are considered to be within the scope of the present invention. For example, means for actuating the valve with the handle are considered within the scope of the present invention, including, but not limited to, hydraulic, mechanical, or pneumatic members that could be used to link the plunger portion of the valve with the handle. In addition, the valve actuator may be adapted to receive other actuation forces, such as, for example, pulling, rotating, and/or pushing forces.

<FIG> depicts a cross-sectional view of servicing device <NUM>. Servicing device <NUM> may include actuator or lever <NUM>, pivoting pin <NUM>, valve body <NUM>, plunger <NUM>, O-ring seal <NUM>, plunger seal <NUM>, biasing member-spring <NUM>, washer seal <NUM>, can adaptor threads <NUM>, piercing/poking tip of plunger <NUM>, cross bored orifice - fluid communications to first fluid port <NUM>, sealing surface <NUM>, fluid communications to second fluid port <NUM>, and anti-theft security tag <NUM>.

Referring to <FIG>, the downward traveling plunger with piercing pin <NUM> opens two types of refrigerant sources. The sources include those which require a seal to be pierced and those that consist of a self sealing valve which require a pin to be depressed. The downward traveling plunger with piercing pin <NUM> reduces complexity of the mechanism, thereby reducing the number of components, simplifying assembly, and reducing overall cost. The servicing device <NUM> allows for self containment of anti-theft security tags within the handle.

In an embodiment, this disclosure provides a device for servicing a refrigeration system. The device comprises a body having a first fluid port, wherein the first fluid port operatively couples to a fluid source; a plunger, the plunger capable of piercing a seal of the fluid source and/or depressing a valve of the fluid source; a second fluid port, wherein the second fluid port operatively couples to a fluid port of refrigeration system; and a plunger seal at least partially disposed in the passage of the body, the plunger seal is configured to seal the second fluid port during use, wherein the plunger is adjustable between an open and closed position during use. The device also comprises an actuator coupled to the body, and wherein, during use, downward movement of the actuator moves the plunger, opening the valve of the fluid source and/or piercing the seal of the fluid source while simultaneously adjusting the position of the plunger seal to allow fluid communication between the first fluid port and the second fluid port. The fluid source is configured to be hand-held and the downward movement of the actuator is performed by a portion of the hand that is holding the fluid source.

In another embodiment, this disclosure provides a method of servicing a refrigeration system using the above device.

A pressure of receiving system <NUM> may be assessed and the level of refrigerant in the receiving system may be determined. In some embodiments, the measurement device <NUM> may indicate the need for additional refrigerant, for example, by displaying a measurement reading. If a need for additional refrigerant is determined, servicing device <NUM> may be used to charge receiving system <NUM> with fluid from fluid source <NUM>. Alternating between providing refrigerant to the refrigeration system and measuring a parameter of the refrigeration system may be performed by applying an actuation force to plunger <NUM> or plunger <NUM> by pushing and releasing actuator <NUM> as desired.

It is appreciated that servicing device <NUM> may be adapted to selectively switch between the charging mode of operation and the measuring mode of operation in alternative ways. For example, it is contemplated that servicing device <NUM> may be adapted such that an actuation force is applied for measuring operation, and no actuation force is applied to plunger <NUM> or plunger <NUM> for charging operation.

In some embodiments, the servicing device may be sold and/or packaged as a complete product or as part of a kit. The kit may also include, a fluid source (for example, a can of refrigerant and/or refrigerant containing additives), additional measuring devices (for example, temperature gauge), safety glasses, towels, funnels, an activating light source (for example, a UV light), or combinations thereof. The kit may be packaged in a carrying case with pre-formed segments to hold the components of the kit. In some embodiments, the carrying case may be plastic and/or include a handle. In some embodiments, the pre-formed segments may be removable.

In some embodiments, a refrigerant system is serviced using servicing device <NUM> described herein. Refrigerant system, in some embodiments, is an automobile air conditioning system. Servicing device may be coupled to refrigerant system using a hose or other suitable conduit to a low pressure side of a refrigerant system. A pressure and/or level of refrigerant of the refrigerant system may be determined. If the refrigerant level is adequate, the servicing device may be disconnected. If the refrigerant level is low, the servicing device may be connected to a fluid source (for example, a can of automobile refrigerant). While holding the servicing device <NUM> attached to the refrigerant can, the handle (actuator) or lever (actuator) of the service device may be depressed sufficiently (for example, pressed with a thumb of the hand) to open the fluid source. Fluid (for example, refrigerant) from the fluid source may flow from the fluid source through the service device and into the refrigerant system. The handle or lever may be released and the pressure and level of refrigerant in the refrigerant system may be determined. The process may be repeated until the level of refrigerant in the refrigerant is adequate.

While holding the can, the handle or lever may be depressed to various depths with the same hand to regulate the flow of refrigerant from the fluid source to the refrigerant system. In some embodiments, the handle may be rotated and locked to allow substantially continuous flow of refrigerant from the fluid source to the refrigerant system (for example, from the can of automobile refrigerant to an automobile refrigerant system). Once an adequate level is reached the servicing device may be disconnected from the refrigerant system and then from the fluid source. The ability to use one hand allows the user to manipulate other tools or products that are needed during the servicing of the refrigerant system. With a locking actuator, the user is able allow the can to stand freely and not require any hands to hold the can. Thus, the refrigerant charging system allows more efficient use of the time used for charging the refrigerant system.

The depiction of the housing, the valve actuator, and the valve are intended to be illustrative only, and not limiting. It is appreciated that the size and shape of the housing may vary markedly without departing from the intended scope of the present invention. These and other modifications to the above-described embodiments of the invention may be made without departing from the intended scope of the invention. It will be apparent to those skilled in the art that various other modifications and variations can be made in the construction, configuration, and/or operation of the present invention without departing from the scope of the invention.

In this patent, certain U. patents and U. patent applications have been incorporated by reference. The text of such U. patents and U. patent applications is, however, only incorporated by reference to the extent that no conflict exists between such text and the other statements and drawings set forth herein. In the event of such conflict, then any such conflicting text in such incorporated by reference U. patents and U. patent applications is specifically not incorporated by reference in this patent.

Further modifications and alternative embodiments of various aspects of the invention may be apparent to those skilled in the art in view of this description. Accordingly, this description is to be construed as illustrative only and is for the purpose of teaching those skilled in the art the general manner of carrying out the invention. It is to be understood that the forms of the invention shown and described herein are to be taken as embodiments. Elements and materials may be substituted for those illustrated and described herein, parts and processes may be reversed, and certain features of the invention may be utilized independently, all as would be apparent to one skilled in the art after having the benefit of this description of the invention. Changes may be made in the elements described herein without departing from the scope of the invention as described in the following claims.

Claim 1:
A device for servicing a refrigerant system, comprising:
a body (<NUM>) comprising:
a first fluid port (<NUM>), wherein the first fluid port (<NUM>) is coupleable to a fluid port (<NUM>) of a fluid source (<NUM>);
a second fluid port (<NUM>), wherein the second fluid port (<NUM>) is operatively coupleable to a refrigeration system;
a passage extending through at least a portion of the body (<NUM>) in fluid communication with the first and second fluid ports (<NUM>; <NUM>);
a plunger (<NUM>) at least partially disposed in the passage of the body (<NUM>), wherein the plunger (<NUM>) is adjustable between a released position and an engaged position, during use; and
a plunger seal (<NUM>) at least partially disposed in the passage of the body (<NUM>) and configured to seal the second fluid port (<NUM>) during use; and
an actuator (<NUM>) coupled to the body (<NUM>), and wherein, during use, downward movement of the actuator (<NUM>) moves the plunger (<NUM>) downward to open the fluid source (<NUM>) while simultaneously adjusting a position of the plunger seal (<NUM>) to allow substantially continuous fluid communication between the first fluid port (<NUM>) and the second fluid port (<NUM>),
characterized in that
the plunger (<NUM>) includes a piercing pin (<NUM>) operable to open two types of fluid sources, the two types of fluid sources including a first type of fluid source which requires a seal to be pierced and a second type of fluid source which contains a self-sealing valve that requires a pin to be depressed.