Quick-release vacuum pump

• US 9,764,479 B2
• Filed: 03/14/2011
• Issued: 09/19/2017
• Est. Priority Date: 03/10/2011
• Status: Active Grant

• Current Assignee: Korea Pneumatic System Co., Ltd.
• Original Assignee: Korea Pneumatic System Co., Ltd.
• Inventors: Cho, Ho-Young
• Primary Examiner(s): Freay, Charles
• Assistant Examiner(s): BOBISH, CHRISTOPHER S
• Application Number:
  US14/002,987
• Publication Number:
  US 20140050595A1
• Time in Patent Office: 2,381 Days
• CPC Class Codes: B25J 15/0625 provided with a valve
• CPC Class Codes: B25J 15/0658 Pneumatic type, e.g. air blast or overpressure
• CPC Class Codes: F04B 53/20 Filtering
• CPC Class Codes: F04F 5/20 for evacuating
• CPC Class Codes: F04F 5/22 of multi-stage type
• CPC Class Codes: F04F 5/467 with a plurality of nozzles arranged in series
• CPC Class Codes: F04F 5/54 Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type
• CPC Class Codes: F16B 35/005 Set screws; Locking means therefor

Abstract

A quick-release vacuum pump which is mainly applied to a vacuum transport system. The vacuum pump has a mechanism in which part of compressed air supplied for generating a vacuum state is stored firstly in a chamber, and then the vacuum state within the chamber is released when transportation is completed. When the vacuum state is released, a check valve is moved by the pressure of air that flows backward. The range of movement of the check valve is adjusted by a control means. An air filter is disposed at the lower end of the check valve. The release of the vacuum state is quick and controllable. Also, the filter is naturally filtered and cleaned.

Claims

1. A quick-release vacuum pump comprising:

a casing which comprises a compressed air inlet and a compressed air outlet provided at opposing side sections and an air suction port provided in a bottom;

a vacuum pump part which comprises a cylindrical hollow area extending through the casing between the inlet and the outlet, one portion of the hollow area communicating with the suction port, and nozzles disposed in series inside the hollow area, both ends of the nozzles communicating with the inlet and the outlet, and slots of the nozzles communicating with the hollow area;

a release part which comprises a support tube provided above the suction port, a skirt-type check valve which is to be seated on an upper portion of the support tube and moved up and down by air pressure of the compressed air provided through the inlet to open and close the upper portion of the support tube, wherein a lower end portion of the check valve is funnel shaped and is inserted into an upper opening of the support tube, and a pressure chamber positioned at a terminal of a passage which communicates with the inlet and passes by a valve skirt;

a control means provided for adjusting a range in which the check valve is to move up, an end of the control means extending through an upper surface of the casing and being disposed above the check valve at a distance from a head of the check valve; and

a filter material which is disposed between the suction port and the support tube, wherein the filter material filters discharge air that is introduced by allowing the discharge air to pass through upward when the pump part operates, and is cleaned by air that is supplied to the suction port below through the support tube from the pressure chamber when the pump part stops operating, and

wherein the control means comprises a screw, which is to adjust the range in which the valve is to move up by varying the distance between the end of the screw and the head of the check valve when rotated to right or left.

2. The quick-release vacuum pump according to claim 1, wherein the nozzles are disposed inside a cylindrical body which has a through-hole in a wall, thereby forming one pump cartridge, with which the nozzles are mounted inside the hollow area.

3. The quick-release vacuum pump according to claim 1, wherein a mounting rib is provided on an upper end of the suction port such that the filter material is firmly mounted.

4. The quick-release vacuum pump according to claim 1, wherein the check valve, the support tube, the filter material and the suction port are arranged in a top-bottom relation in a line.