Refrigerant charging tool

• US 6,655,407 B1
• Filed: 04/04/2003
• Issued: 12/02/2003
• Est. Priority Date: 04/04/2003
• Status: Active Grant

• Current Assignee: Technical Chemical Company, Inc.
• Original Assignee: Technical Chemical Company, Inc.
• Inventors: Dudley, Newton Howard
• Primary Examiner(s): Walton, George L.
• Application Number:
  US10/407,659
• Time in Patent Office: 242 Days
• Field of Search: 713/2, 714/2, 715/6, 715/8, 717/0, 62/77, 621/49, 622/92, 622/94, 304/43, 81/34, 81/34.4, 813/00, 814/11, 814/18, 814/21, 814/22, 814/23, 814/24, 814/245, 814/26, 137/15.13, 137/15.14, 137/317, 137/318, 137/614.05, 137/883, 141/311.R, 141/329, 141/348, 222/5, 222/81, 222/82, 222/83, 222/83.5, 222/192
• US Class Current: 137/318
• CPC Class Codes: F16L 41/065 without removal of material
• CPC Class Codes: Y10T 137/6123 With aperture forming means
• CPC Class Codes: Y10T 137/87877 Single inlet with multiple distinctly valved outlets
• CPC Class Codes: Y10T 137/87965 Valve- or closure-operated by coupling motion

Abstract

A refrigerant charging tool. In a described embodiment, a refrigerant charging tool has two separately formed handles pivotably attached to each other. One of the handles has a container piercing member mounted thereon. Interchangeable spacers are configured for attachment to the other handle, so that a selected one of differently shaped containers may be biased against the container piercing member when the handles are pivoted toward each other.

Claims

1. A tool for use in dispensing fluid from a selected one of at least first and second differently shaped and sized containers into a refrigeration system, the tool comprising:

a handle assembly including first and second pivotably attached handles, each of said handles having a grip portion and a container receiving portion, and a container piercing member projecting inwardly from the first handle container receiving portion; and

first and second interchangeable container spacers, a selected one of the first and second container spacers being releasably attached to the second handle container receiving portion to position a corresponding one of the at least first and second containers laterally away from the second handle container receiving portion and toward the container piercing member said first and second interchangeable container spacers having dual surfaces defining a single unit that engages inner and outer surfaces of said second handle container receiving portion.

2. The tool according to claim 1,

wherein the first container spacer includes a first handle attachment portion adapted to at least partially encircle the second handle container receiving portion, and a generally crescent-shaped portion having a first inner side surface complementarily shaped relative to the first container, and

wherein the second container spacer includes a second handle attachment portion adapted to at least partially encircle the second handle container receiving portion, and a generally annular-shaped portion having a second inner side surface complementarily shaped relative to the second container.

3. The tool according to claim 2,

wherein a first outer side surface of the generally crescent-shaped portion has a series of spaced apart abutments formed thereon adapted to intermittently contact an inner side surface of the second handle container receiving portion, and

wherein a second outer side surface of the generally annular-shaped portion is adapted to substantially continuously contact the second handle container receiving portion inner side surface.

4. The tool according to claim 2,

wherein the generally crescent-shaped portion is circumferentially offset relative to the first handle attachment portion, and

wherein the generally annular-shaped portion is circumferentially aligned with the second handle attachment portion.

5. The tool according to claim 1, wherein the first and second handles are separately formed from each other and pivotably attached via a hinged connection opposite the grip portion of each handle, the first and second handles being releasably securable in a closed position by a locking device positioned between the first and second handle grip portions.

6. The tool according to claim 5, wherein the piercing member is spaced about ninety degrees from the hinged connection about the first handle container receiving portion and is positioned opposite the second handle container receiving portion.

7. The tool according to claim 1,

wherein the first container is a relatively small diameter industry standard 202×

406 size oil charge container, the first container spacer having a first inner side surface configured to receive the oil charge container therein, and

wherein the second container is a relatively larger diameter industry standard 211×

413 size R-12 refrigerant container, the second container spacer having a second inner side surface configured to receive the R-12 refrigerant container therein.

8. The tool according to claim 7, wherein the first inner side surface has an inner radius which is complementarily shaped relative to the oil charge container, and

wherein the second inner side surface has an inner radius which is complementarily shaped relative to the R-12 refrigerant container.

9. The tool according to claim 7, wherein at least one of the container receiving portions is configured to receive an industry standard approximately three inch diameter R-134a refrigerant container when the first and second container spacers are not attached to the second handle container receiving portion.

10. The tool according to claim 1, further comprising multiple connections configured for interconnection to corresponding multiple refrigerant systems, each of the multiple connections being in fluid communication with the container piercing member.

11. The tool according to claim 10, wherein each of the connections is a threaded connection formed on a fitting attached to the container piercing member.

12. The tool according to claim 11, wherein the fitting comprises a T-fitting.

13. The tool according to claim 10, wherein a first one of the connections has ½

inch nominal diameter, 16 threads per inch Acme threads formed thereon, and wherein a second one of the connections has {fraction (7/16)} nominal diameter, 20 threads per inch UNF threads formed thereon.

14. The tool according to claim 10, wherein a first one of the connections is configured to connect to an R-134a refrigeration system, and wherein a second one of the connections is configured to connect to an R-12 refrigeration system.

15. A tool for use in dispensing fluid from a selected one of at least first, second and third differently shaped and sized containers into a refrigeration system, the tool comprising:

a handle assembly including first and second pivotably attached handles, each of said handles having a grip portion and a container receiving portion, the first and second handles being separately formed from each other and pivotably attached via a hinged connection opposite the grip portion of each handle, each container receiving portion being generally semi-circular shaped, the first and second handles being releasably securable in a closed position by a locking device positioned between the first and second handle grip portions, and a container piercing member projecting inwardly from the first handle container receiving portion; and

first and second interchangeable container spacers, each of the container spacers being adapted to releasably attach to the second handle container receiving portion and being configured to position a corresponding one of the at least first and second containers laterally away from the second handle container receiving portion and toward the container piercing member, the third container being operably receivable in the handle assembly when neither of the first and second spacers is attached to the second handle container receiving portion said first and second interchangeable container spacers having dual surfaces defining a single unit that engages inner and outer surfaces of said second handle container receiving portion.

16. The tool according to claim 15, wherein each of the first and second container spacers includes a handle attachment portion adapted to at least partially encircle the second handle container receiving portion, and an inner spacer portion having an inner side surface complementarily shaped relative to the corresponding one of the first and second containers.

17. The tool according to claim 16, wherein the inner spacer portion further has an outer side surface configured for cooperative engagement with an inner side surface of the second handle-container receiving portion.

18. The tool according to claim 17,

wherein the inner spacer portion outer side surface of the first spacer has a series of spaced apart abutments formed thereon adapted to intermittently contact the second handle container receiving portion inner side surface, and

wherein the inner spacer portion outer side surface of the second spacer, is adapted to substantially continuously contact the second handle container receiving portion inner side surface.

19. The tool according to claim 18, wherein the inner spacer portion and the handle attachment portion of each of the first and second container spacers together have a generally U-shaped cross-section having an open side, the second handle container receiving portion being received in the open side.

20. The tool according to claim 19,

wherein the inner spacer portion of the first spacer is circumferentially offset relative to the first spacer handle attachment portion, and

wherein the inner spacer portion of the second spacer is circumferentially aligned with the second spacer handle attachment portion.

21. The tool according to claim 15, wherein the piercing member is spaced about ninety degrees from the hinged connection about the first handle container receiving portion and is positioned opposite the second handle container receiving portion.

22. The tool according to claim 21, wherein the piercing member is molded within the first handle container receiving portion.

23. The tool according to claim 15, further including a gasket disposed about the piercing member and received in a recess formed in an inner side surface of the first handle container receiving portion.

24. The tool according to claim 15, further comprising multiple connections configured for interconnection to corresponding multiple refrigerant systems, each of the multiple connections being in fluid communication with the container piercing member.

25. The tool according to claim 24, wherein each of the connections is a threaded connection formed on a fitting attached to the container piercing member.

26. The tool according to claim 25, wherein the fitting comprises a T-fitting.

27. The tool according to claim 24, wherein a first one of the connections has ½

inch nominal diameter, 16 threads per inch Acme threads formed thereon, and wherein a second one of the connections has {fraction (7/16)} nominal diameter, 20 threads per inch UNF threads formed thereon.

28. The tool according to claim 24, wherein a first one of the connections is configured to connect to an R-134a refrigeration system, and wherein a second one of the connections is configured to connect to an R-12 refrigeration system.

29. A tool for dispensing fluid into a refrigeration system from a selected one of an industry standard R-134a refrigerant. container, an industry standard oil charge container and an industry standard R-12 refrigerant container, the tool comprising:

a handle assembly including;

first and second pivotably attached handles, each of said handles having a grip portion and a container receiving portion, the first and second handles being separately formed from each other and pivotably attached to each other via a hinged connection joining the container receiving portions to each other, each container receiving portion being generally semi-circular shaped, the first and second handles being releasably securable in a closed position by a locking device positioned between the first and second handle grip portions,

a container piercing member molded within and projecting inwardly from the first handle container receiving portion, the piercing member being positioned between the hinged connection and the first handle grip portion, and positioned opposite the second handle container receiving portion, and

a gasket disposed about the piercing member and received in a recess formed in an inner side surface of the first handle container receiving portion;

multiple connections configured for interconnection to corresponding multiple refrigerant systems, each of the multiple connections being in fluid communication with the container piercing member, a first one of the connections being configured to connect to an R-134a refrigeration system, and a second one of the connections being configured to connect to an R-12 refrigeration system; and

first and second interchangeable container spacers adapted to releasably attach to the second handle container receiving portion, the first container spacer being configured to position the oil charge container laterally away from the second handle container receiving portion and toward the piercing member, the first container spacer including an inner side surface complementarily shaped relative to the oil charge container, the second container spacer being configured to position the R-12 container laterally away from the second handle container receiving portion and toward the piercing member, the second container spacer including an inner side surface complementarily shaped relative to the R-12 refrigerant container, and the handle assembly being configured to operably receive the R-134a refrigerant container therein when neither of the spacers is attached to the second handle container receiving portion, and the second handle container receiving portion being radiused to receive the R-134a refrigerant container.