# US 9,518,607 B2 · Drain proof bearing assembly

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- Number: US 9,518,607 B2
- Document ID: US9518607B2
- Status: Granted
- Kind: B2
- Application number: 14/507,800
- Filed: 2014-10-06
- Published: 2016-04-07
- Granted: 2016-12-13
- Earliest claimed: 2014-10-06
- Applicants: John Wun-Chang Shih
- Inventors: John Wun-Chang Shih
- Web page: https://patentgrep.com/patent/US9518607B2

## CPC

- F16C 33/74: of sliding-contact bearings
- F16C 17/107: {with at least one surface for radial load and at least one surface for axial load}
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

A drain proof bearing assembly includes a seat; a cylindrical bearing being receivable in a hollow space of the seat; the bearing being formed with an axial hole; an upper opening of the axial hole of the bearing being formed with an annual recess for receiving a drain proof ring; a plurality of radial notches being formed radially on an upper surface of the bearing; an outer surface of the bearing being formed with a plurality of oil guiding trenches; by the notches, the oil guiding trenches being communicated to the annular recess; and a press plate having an inner hollow penetrating hole and receivable in the hollow spate of the seat. Thereby, the fluid is prevented from draining out along the path from the spindle to the press plate. This design is effective from various kinds of bearings, such as fluid dynamic bearings, or oil bearings, etc.

## Claims

### Claim 1

A drain proof bearing assembly comprising:
a seat having an axially arranged hollow space; and an upper end thereof being opened;
a cylindrical bearing being receivable in the hollow space of the seat; the bearing being formed with an axial hole axially penetrating therethrough for receiving a spindle;
an upper side of the bearing near an upper opening of the axial hole of the bearing being formed with an annual recess for receiving a drain proof ring; a plurality of radial notches being formed radially on an upper surface of the bearing; an outer surface of the bearing being formed with a plurality of oil guiding trenches; an upper end of each oil guiding trench being communicated with one end of a respective notch and another end of the notch being communicated to the annular recess; thus, by the notches, the oil guiding trenches being communicated to the annular recess; and
a press plate having an inner hollow penetrating hole and receivable in the hollow space of the seat;
wherein in installation, the bearing is received into the hollow space of the seat; then, the spindle is received into the axial hole of the bearing while the annual groove of the seat is at an upper side of the bearing; then the drain proof ring is fitted into the annular recess of the bearing so as to clamp the spindle tightly in the axial hole of the bearing; and finally the press plate is located at an upper side of the bearing and is received within the hollow space of the seat.

### Claim 2 (depends on 1)

The drain proof bearing assembly as claimed in claim 1, wherein at least one buckle has one end inserted axially into the press plate and another end thereof is protruded from an inner wall of the press plate; and the buckle is elastic; and
wherein since the buckle is elastic so that the spindle can pass through the at least one buckle to enter into the axial hole of the bearing to be located therein, while the at least one buckle are located in an annular groove of the spindle to fix the spindle without fall out; the drain proof ring installed within the annual recess has the effect of preventing fluid from flowing out along an outer surface of the spindle and the notches.

### Claim 3 (depends on 2)

The drain proof bearing assembly as claimed in claim 2, wherein the at least one buckle is integrally formed with the press plate.

### Claim 4 (depends on 1)

The drain proof bearing assembly as claimed in claim 1, wherein the bearing is one of fluid dynamic bearings and oil bearings.