Hand vacuum pump with linear piston actuation

• US 20020124718A1
• Filed: 03/01/2001
• Published: 09/12/2002
• Est. Priority Date: 03/01/2001
• Status: Active Grant

• Current Assignee: Innova Electronics Corporation (Innova Telematics Solutions)
• Original Assignee: Innova Electronics Corporation (Innova Telematics Solutions)
• Inventors: Protti, John
• Granted Patent: US 6,499,385 B2
• Time in Patent Office: Days
• US Class Current: 92/140
• CPC Class Codes: F04B 33/00 Pumps actuated by muscle power, e.g. for inflating
• CPC Class Codes: Y10T 74/1892 Lever and slide
• CPC Class Codes: Y10T 74/2057 Variable input leverage

Abstract

A hand-held vacuum pump has a piston for drawing a vacuum. The pump has a piston rod having a piston end and a distal end. The piston end is attached to the piston. The pump further has a pivot lever having a rod end, a handle end, and a pivot interface disposed therebetween. The rod end is rotatably attached to the distal end. The pump has a pivot support having a support interface. The support interface is cooperatively sized and configured with the pivot interface to translate the rod end of the pivot lever in substantially axial movement of the piston rod.

Claims

1. A hand-held vacuum pump comprising:

a piston for drawing a vacuum;

a piston rod having a piston end and a distal end, the piston end being attached to the piston;

a pivot lever having a rod end, a handle end, and a pivot interface disposed therebetween, the rod end being rotatably attached to the distal end of the piston rod; and

a pivot support having a support interface, the support interface being cooperatively sized and configured with the support interface to translate the rod end of the pivot lever in substantially axial movement of the piston rod upon rotation of the pivot lever about the support interface in response to actuation of the handle end of the pivot lever.

2. The hand-held vacuum pump of claim 1 wherein the pivot interface has at least two stepped pivot members, and the support interface has at least two stepped support members sized and configured to sequentially cradle respective ones of the at least two stepped pivot members for rotating the pivot lever about the support interface.

3. The hand-held vacuum pump of claim 2 wherein the support interface and the pivot interface are cooperatively sized and configured to translate the rod end of the pivot lever along sequential arced paths associated with respective cradling of the stepped pivot members with the stepped support members for substantially axial movement of the piston rod upon rotation of the pivot lever about the support interface in response to actuation of the handle end of the pivot lever.

4. The hand-held vacuum pump of claim 2 wherein the at least two stepped support members comprises three stepped support members, and the at least two stepped support members comprises three stepped support members.

5. The hand-held vacuum pump of claim 2 wherein the stepped pivot members are convex V-shaped.

6. The hand-held vacuum pump of claim 2 wherein the stepped support members are concave V-shaped.

7. The hand-held vacuum pump of claim 1-vacuum pump further includes a forward handle disposed in fixed relation to the pivot support for actuating the piston upon clasped engagement of the forward handle and the handle end of the pivot lever towards each other.

8. The hand-held vacuum pump of claim 7 wherein the pivot support is integrated with the forward handle.

9. The hand-held vacuum pump of claim 1 wherein the pivot lever further includes a rotational stop sized and configured to prevent rotation of the pivot lever.

10. The hand-held vacuum pump of claim 9 wherein the rotational stop is sized and configured to engage the pivot support for preventing rotation of the pivot lever.

11. A hand-held vacuum pump comprising:

a piston for drawing a vacuum;

a piston rod having a piston end and a distal end, the piston end being attached to the piston;

a pivot lever having a rod end, a handle end, and a pivot interface disposed therebetween, the rod end being rotatably attached to the distal end of the piston rod, the pivot interface having at least two stepped pivot members; and

a pivot support having a support interface, the support interface having at least two stepped support members sized and configured to sequentially cradle respective ones of the at least two stepped pivot members for rotating the pivot lever about the support interface; and

wherein the support interface and the pivot interface are cooperatively sized and configured to translate the rod end of the pivot lever in substantially axial movement of the piston rod upon rotation of the pivot lever about the support interface in response to actuation of the handle end of the pivot lever.

12. The hand-held vacuum pump of claim 11 wherein the support interface and the pivot interface are cooperatively sized and configured to translate the rod end of the pivot lever along sequential arced paths associated with respective cradling of the stepped pivot members with the stepped support members for substantially axial movement of the piston rod upon rotation of the pivot lever about the support interface in response to actuation of the handle end of the pivot lever.

13. The hand-held vacuum pump of claim 11 wherein the at least two stepped support members comprises three stepped support members, and the at least two stepped support members comprises three stepped support members.

14. The hand-held vacuum pump of claim 11 wherein the stepped pivot members are convex V-shaped.

15. The hand-held vacuum pump of claim 11 wherein the stepped support members are concave V-shaped.

16. The hand-held vacuum pump of claim 11 vacuum pump further includes a forward handle disposed in fixed relation to the pivot support for actuating the piston upon clasped engagement of the forward handle and the handle end of the pivot lever towards each other.

17. The hand-held vacuum pump of claim 16 wherein the pivot support is integrated with the forward handle.

18. The hand-held vacuum pump of claim 11 wherein the pivot lever further includes a rotational stop sized and configured to prevent rotation of the pivot lever.

19. The hand-held vacuum pump of claim 18 wherein the rotational stop is sized and configured to engage the pivot support for preventing rotation of the pivot lever.