There is described herein an apparatus comprising a shoulder washer that comprises a shank, a shoulder coupled with the shank, a bore passing through the shank and the shoulder, and a step. The step is coupled with the shoulder and at least partially encircles the shank where the shank meets the sho
There is described herein an apparatus comprising a shoulder washer that comprises a shank, a shoulder coupled with the shank, a bore passing through the shank and the shoulder, and a step. The step is coupled with the shoulder and at least partially encircles the shank where the shank meets the shoulder. In other embodiments, the apparatus is employed with a bearing, where the step is selected to provide a gap that allows the bearing to freely rotate while engaged with the aforementioned apparatus. In yet other embodiments, flat washers may have employed shoulder bearings that do not have steps for engaging a bearing and providing a gap that is allows the bearing to freely rotate while engaged with the shoulder washers.
대표청구항▼
1. An apparatus, comprising: a shoulder washer that comprises a shank, a shoulder coupled with the shank, a bore passing through the shank and the shoulder, and a step;the shoulder having at least one annular groove;wherein the step is coupled with the shoulder and at least partially encircles the s
1. An apparatus, comprising: a shoulder washer that comprises a shank, a shoulder coupled with the shank, a bore passing through the shank and the shoulder, and a step;the shoulder having at least one annular groove;wherein the step is coupled with the shoulder and at least partially encircles the shank;wherein a height of the step is selected to cause a gap of a predetermined size, when the step is engaged with an inner ring of a bearing, between the shoulder and the bearing, and the at least one annular groove forms a labyrinth seal between the shoulder and the bearing. 2. The apparatus set forth in claim 1, wherein the step fully encircles the shank. 3. The apparatus set forth in claim 1, further comprising: the bearing further comprising an outer ring, and first and second sides;a second shoulder washer, the second shoulder washer comprises: a second shank, a second shoulder coupled with the second shank, a second bore passing through the second shank and the second shoulder, and a second step;the second shoulder having at least one second annular groove;wherein the second step is coupled with the second shoulder and at least partially encircles the second shank;wherein the first shoulder washer and second shoulder washer are coupled with the bearing at the first and second sides of the bearing respectively;wherein the step on the first shoulder washer engages the inner ring of the bearing on to first side and the second step engages the inner ring of the bearing on the second side; andwherein a height of the second step is selected to cause a second gap of a predetermined second size, when the second step is engaged with the inner ring of the bearing on the second side, between the second shoulder and the second side of the bearing, the at least one second annular groove forming a second labyrinth seal between the second shoulder and the bearing. 4. The apparatus set forth in claim 3, wherein the first gap and second gap are equal. 5. The apparatus set forth in claim 3, wherein the shoulder of the first shoulder washer has an outer diameter greater than an inner diameter of the outer ring and less than an outer diameter of the outer ring of the bearing. 6. The apparatus set forth in claim 5, wherein the second shoulder has an outer diameter greater than an inner diameter of the outer ring and less than an outer diameter of the outer ring of the bearing. 7. The apparatus set forth in claim 5, wherein the bearing is sealed by a first seal on the first side of the bearing and a second seal on the second side of the bearing. 8. The apparatus set forth in claim 7, wherein the shoulder of the first shoulder washer has an outer diameter that extends beyond the first seal. 9. The apparatus set forth in claim 8, wherein the second shoulder has an outer diameter that extends beyond the second seal. 10. The apparatus set forth in claim 3, wherein the step on the first shoulder washer extends not more than 0.250 inches away from the shoulder of the first shoulder washer. 11. The apparatus set forth in claim 10, wherein the second steps extends not more than 0.250 inches away from the shoulder of the first washer. 12. The apparatus set forth in claim 3, wherein the step on the first shoulder washer is a minimum length that allows the bearing to move freely. 13. The apparatus set forth in claim 12, wherein the second step is a minimum length that allows the bearing to move freely. 14. The apparatus set forth in claim 3, wherein the shank of the first shoulder washer and the second shank are sized where a combined length of the first and second shanks are not greater than a width of the bearing. 15. An apparatus, comprising: a first shoulder washer that comprises a first shank, a first shoulder coupled with the shank, a bore passing through the first shank and the shoulder and the shoulder having at least one annular groove;a first flat washer having an inner diameter greater than an outer diameter of the first shank;a bearing having an inner ring and an outer ring, and first and second sides;a second shoulder washer that comprises a second shank, a second shoulder coupled with the shank, a second bore passing through the second shank and the second shoulder, and at least one second annular groove;a second flat washer having an inner diameter greater than an outer diameter of the second shank;wherein the first shoulder washer and second shoulder washer are coupled with the bearing at the first and second sides of the bearing respectively; andwherein the first flat washer is disposed on the first shank and engages the inner ring of the bearing on the first side;wherein the second flat washer is disposed on the second shank and engages the inner ring of the bearing on the second sidewherein the thickness of the first flat washer is selected to cause a gap of a predetermined size when the first flat washer is engaged with an inner ring of the bearing between the shoulder and the bearing, the at least one annular groove forming a labyrinth seal between the shoulder and the bearingwhere the thickness of second flat washer is selected to cause a gap of a predetermined size when the second flat washer is engaged with an inner ring of a bearing between the second shoulder and the bearing, the at least one second annular groove forming a labyrinth seal between the shoulder and the bearing. 16. The apparatus set forth in claim 15, wherein the thickness of the first washer is not more than 0.250 inches. 17. The apparatus set forth in claim 15, wherein the first flat washer has a first thickness selected to provide a first gap between the shoulder of the first shoulder washer and the bearing that is a minimum gap that allows the bearing to turn freely while the first shoulder washer is engaged with the bearing; andwherein the second flat washer has a second thickness selected to provide a second gap between the second shoulder washer and the second side of the bearing is a minimum gap that allows the bearing to turn freely while the second shoulder washer is engaged with the bearing.
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