Oil supplying apparatus for hermetic type compressor

• US 5,803,718 A
• Filed: 01/05/1996
• Issued: 09/08/1998
• Est. Priority Date: 04/03/1995
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Woo, Jin Hyun
• Primary Examiner(s): Thorpe, Timothy
• Assistant Examiner(s): TYLER, CHERYL JACKSON
• Application Number:
  US08/583,440
• Time in Patent Office: 977 Days
• Field of Search: 417/372, 184/6.16, 184/6.18, 184/63, 415/88, 60/39.32
• US Class Current: 417/372
• CPC Class Codes: F04B 39/0246 in the rotating shaft

Abstract

An improved oil supplying apparatus for a hermetic type compressor capable of preventing a burr formation due to scratches caused between an outer sharp edge portion of a propeller and the inner surface of a casing when the propeller is inserted into the casing by providing protrusions at both ends of upper and intermediate support blades of the propeller, which includes a crank shaft having an outer guide groove formed on an outer surface thereof and an inner guide groove formed on an inner portion thereof; a casing connected to the lower portion of a lower portion of the inner guide groove of the crank shaft; and an oil supplying unit having an oil supplying unit, a supporting unit, and a scratch prevention unit, the oil supplying unit, the supporting unit, and the scratch prevention unit being disposed within the casing.

Claims

1. An oil supplying apparatus for a hermetic type compressor, comprising:

a crank shaft having an outer guide groove formed on an outer surface thereof and an inner guide groove formed on an inner portion thereof;

a casing connected to the lower portion of a lower portion of said inner guide groove of said crank shaft; and

oil supplying means having an oil supply unit for supplying oil into the casing, a supporting unit engaging an inner surface of the casing, and having at least one pair of blades and protrusions formed on a radially outer surface of the at least one pair of blades, the protrusions serving to prevent scratching of the inner surface of the casing by the at least one pair of blades, said oil supply unit, said supporting unit, and said protrusions being disposed within said casing.

2. The apparatus of claim 1, wherein said oil supplying unit comprises a pair of fork-shaped lower support blades.

3. The apparatus of claim 1, wherein said supporting unit includes a pair of opposing upper support blades and a pair of opposing intermediate support blades, wherein the cross sections of said upper support blades and said intermediate support blades are elliptical when the upper support blades and the intermediate support blades are not inside the casing.

4. The apparatus of claim 3, wherein said protrusions are respectively formed at an outermost edge portion of the upper and intermediate support blades of the supporting unit.

5. The apparatus of claim 1, wherein said protrusions are located between the oil supplying unit and the inner surface of the casing.

6. The apparatus of claim 1, wherein said oil supplying means is elastically supported to the inner surface of the casing.

7. The apparatus of claim 1, wherein said protrusions have rounded portions.

8. The apparatus of claim 1, wherein the distance between one of said protrusions and an oppositely located another one of said protrusions is larger than an inner diameter of the casing.