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Hand held pump

A pump cylinder and movable handle technology, applied in the direction of pumps, oil suction pumps, other medical equipment, etc., can solve the problems of "O" ring being easily worn and shortening the life of "O" ring

Inactive Publication Date: 2006-09-27
ALLTRADE TOOL LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This tilt causes the "O" ring that normally seals the piston in the pump cylinder to be prone to wear, thus reducing the life of the "O" ring to the point where it needs to be replaced

Method used

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Examples

Experimental program
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Embodiment Construction

[0012] [0012] Referring now to the accompanying drawings, a hand-held vacuum pressure pump 10 has a pump body 12 that includes a vacuum pressure gauge 14, a pump nozzle 16, a pump inlet-outlet control ring 18, and a valve assembly 19, all of which are conventional and may be similar to those corresponding structures shown in Patent No. 6,558,130 or Patent No. 4,775,302, or may be similar to other known prior art devices, as will be apparent to those skilled in the art. The pump body 12 comprises a cylindrical member 20 (hereinafter referred to as "cylinder 20") in which a piston 22 is placed. An “O” ring 24 is placed around the periphery of the piston 22 and forms a seal between the piston 22 and the walls of the cylinder 20 .

[0013] [0013] The pump 10 has a fixed handle 26 and a movable handle 28 that are pivotally (or rotatably) connected at respective ends by a pivot pin 30 of conventional construction. A fixed handle 26 is secured to the pump body 12 by any suitable con...

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PUM

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Abstract

A hand held vacuum and pressure pump has a fixed handle, with a movable handle pivotally connected thereto at one end thereof, the fixed handle being fixed to a pump cylinder so as to be perpendicular thereto. A spring loaded piston rod extends from the movable handle through the fixed handle and is fixedly attached at one end to a piston which is contained in the pump cylinder and has a peripheral O-ring forming a seal therewith. Valve means controls whether manual movement of the movable handle toward the fixed handle forces fluid contained in the cylinder out of the cylinder or draws fluid into the cylinder. The movable handle has a longitudinal recess formed therein through which a connecting pin extends, the connecting pin being connected to the piston rod at the piston rod end remote from the piston, so that the arcuate movement of the movable handle toward and away from the cylinder permits the connecting pin to move longitudinally in the movable handle longitudinal recess, whereby the piston rod moves linearly when moving longitudinally in the cylinder, thereby avoiding canting the piston and so scuffing the O-ring when the piston rod moves longitudinally in the cylinder.

Description

technical field [0001] [0001] The present invention relates to a bi-directional manual hand-held pump or pump capable of selectively applying vacuum or pressure to the pump outlet. Background technique [0002] [0002] Bi-directional hand-held pumps of conventional nozzle type construction capable of selectively applying vacuum or pressure to the pump outlet are known in the art. These pumps generally have a fixed handle and a movable handle, and the pumps can be divided into two categories according to the structural configuration of the handle. Thus, U.S. Patent No. 4,775,302 issued to Theodore C. Neward on October 4, 1988 has a handle structure in the form of a Class 1 lever, while U.S. Patent No. 6,558,130 issued to Hseuh ChinChang on May 6, 2003 has a handle structure in the form of a Class 2 lever. Handle structure. It will be apparent to those skilled in the art that in order to reduce the amount of manual force required to operate the pump, a Type 2 lever configurat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B37/14F04B33/00
CPCA61M2001/0068A61M1/0068A61M1/0066A61M3/0262A61M2205/073A61M1/81A61M1/80
Inventor H·R·赫南达斯
Owner ALLTRADE TOOL LLC