Patent US3571986A successfully refreshed from Google Patents.
US3571986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shoe for rubbing machine
Assignee: National Detroit Inc
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Filing: 1969-05-29
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Granted: 1971-03-23
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Expires: 1989-05-29
Abstract
Abstract An elongated rubbing shoe mounted for gyratory motion on a rubbing machine. To form the shoe, an elongated support is covered on its bottom and the top of one end portion with a layer of resiliently compressible material. A rubbing sheet underlies the layer, and one end of the sheet is anchored to the support by a clamp mounted on the top of one end portion of the support. A roller mounted on the top of the other end portion of the support is operable to pull the sheet tightly around the resilient layer and hold the sheet tensioned between the clamp and the roller. One end portion of the support is bent upwardly and the layer of resilient material is curved upwardly around that end portion and along the top of that portion. When the sheet is tensioned by the roller, the resilient material curving around the end portion of the support is radially compressed. As the sheet stretches in use, the resilient material expands to maintain the sheet tensioned between the clamp and the roller.
Inventors
- 👤 Roy J Champayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:49
CPC Classifications
B; B24; B24B; B24B23/00; B24B23/04; B24B23/046
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
140 words
A rubbing shoe comprising an elongated horizontal support, a layer of resiliently compressible material attached to the bottom of said support and curving upwardly around one end portion of the support and along the top of said portion, a flexible rubbing sheet underlying said resilient material, a clamp on one end portion of said support for gripping one end of the rubbing sheet and anchoring said one end to said support, means at the other end portion of said support for drawing and tensioning the rubbing sheet between said clamp and said means and tightly against said resilient material to radially compress the material curving around said end portion as an incident to clamping the sheet in place whereby the resilient material expands as the sheet stretches thereby to maintain the rubbing sheet tensioned between said clamp and said means.
Claim 2
Dependent Claim
140 words
A rubbing shoe comprising an elongated horizontal support, a layer of resiliently compressible material attached to the bottom of said support and curving upwardly around one end portion of the support and along the top of said portion, a flexible rubbing sheet underlying said resilient material, a clamp on one end portion of said support for gripping one end of the rubbing sheet and anchoring said one end to said support, means at the other end portion of said support for drawing and tensioning the rubbing sheet between said clamp and said means and tightly against said resilient material to radially compress the material curving around said end portion as an incident to clamping the sheet in place whereby the resilient material expands as the sheet stretches thereby to maintain the rubbing sheet tensioned between said clamp and said means.
Claim 3
Dependent Claim
22 words
The rubbing shoe of claim 1 in which said one end portion is bent upwardly thereby facilitating the rubbing of curved surfaces.
Claim 4
Dependent Claim
135 words
In a rubbing machine, the combination of, an elongated rubbing shoe, a flexible rubbing sheet positioned around one side of said shoe and over the ends of said shoe, a clamp at one end of said shoe for anchoring one end of said sheet to the shoe, a roller mounted at the other end of said shoe for rotation about an axis extending transversely of the shoe, said roller being biased against said shoe, means on said roller for turning the latter in one direction about said axis to pull said sheet between the roller and the shoe and thereby draw the sheet snugly against said one side of the shoe, and means for locking the roller against rotation in a direction opposite said one direction to prevent loosening of the sheet on the shoe.
Claim 5
Dependent Claim
135 words
In a rubbing machine, the combination of, an elongated rubbing shoe, a flexible rubbing sheet positioned around one side of said shoe and over the ends of said shoe, a clamp at one end of said shoe for anchoring one end of said sheet to the shoe, a roller mounted at the other end of said shoe for rotation about an axis extending transversely of the shoe, said roller being biased against said shoe, means on said roller for turning the latter in one direction about said axis to pull said sheet between the roller and the shoe and thereby draw the sheet snugly against said one side of the shoe, and means for locking the roller against rotation in a direction opposite said one direction to prevent loosening of the sheet on the shoe.
Claim 6
Dependent Claim
174 words
An abrading shoe comprising an elongated horizontal support, a flexible abrasive sheet positioned around the bottom and over the ends of said support, a clamp on one end portion of said support for anchoring one end of said sheet to said support, a roller mounted on the other end portion of said support on the upper side thereof for rotation about an axis extending transversely of the support, said roller being covered with a resiliently yieldable material and being biased downwardly against said support so that a portion of said material in contact with said support is compressed radially, the other end of said sheet being threaded between said roller and said upper side, means on said roller for rotating the latter in one direction about said axis causing the resiliently yieldable material of said roller to grip and pull said sheet tightly across the bottom of said support, and means operable to lock said roller against rotation in a direction opposite said one direction to hold said sheet positioned tightly across said bottom.
Claim 7
Dependent Claim
174 words
An abrading shoe comprising an elongated horizontal support, a flexible abrasive sheet positioned around the bottom and over the ends of said support, a clamp on one end portion of said support for anchoring one end of said sheet to said support, a roller mounted on the other end portion of said support on the upper side thereof for rotation about an axis extending transversely of the support, said roller being covered with a resiliently yieldable material and being biased downwardly against said support so that a portion of said material in contact with said support is compressed radially, the other end of said sheet being threaded between said roller and said upper side, means on said roller for rotating the latter in one direction about said axis causing the resiliently yieldable material of said roller to grip and pull said sheet tightly across the bottom of said support, and means operable to lock said roller against rotation in a direction opposite said one direction to hold said sheet positioned tightly across said bottom.
Claim 8
Dependent Claim
86 words
The rubbing shoe of claim 4 in which a layer of resiliently yieldable material is mounted on the bottom of said support to provide a backing for said sheet and is curved upwardly around said one end portion and along the upper surface of said one end portion, said curved portion of said layer being radially compressed when said sheet is pulled by said roller whereby the layer expands as the sheet stretches to maintain the rubbing sheet tightly stretched between said clamp and said roller.
Claim 9
Dependent Claim
104 words
The rubbing shoe of claim 4 in which said means for rotating the roller and for locking the roller against rotation is a resiliently yieldable handle which is connected to said roller for rotation with the latter and which extends radially from said roller near one end of the roller, said handle normally being positioned to contact said support to prevent rotation of said roller in said opposite direction and being laterally yieldable whereby said handle may be moved laterally to avoid contact with said support and may be rotated about said axis to rotate said roller and effect the pulling of said sheet.
Claim 10
Dependent Claim
57 words
The rubbing shoe of claim 6 in which said handle lockingly contacts said support in only one angular position during rotation of said roller, and in which said roller slips on said sheet once said sheet is pulled to a predetermined tension whereby said roller may continue to be rotated until said handle reaches said one position.
Claim 11
Dependent Claim
89 words
The rubbing shoe of claim 4 in which said roller comprises a cylindrical tube having two end portions and having a central portion connecting the end portions with said layer of resiliently yieldable material covering the central portion, a pair of elongated resilient arms each formed with arcuate end portions, said arcuate portions being hooked over a respective end portion of said roller to support said roller for rotation, and the other end portions of said arms being clamped toward said support to bias said roller against said support.
Claim 12
Dependent Claim
104 words
The rubbing shoe of claim 4 in which said roller comprises a cylindrical central portion covered with said layer of resiliently yieldable material and includes cylindrical trunnions projecting axially from the ends of said central portion and smaller in diameter than the combined diameters of said central portion and said layer, a generally U-shaped spring having arms formed with downwardly curved end portions hooked over and journaling said trunnions for rotation on said support, said spring including a connecting member anchored to said support and interconnecting said arms with the latter projecting upwardly from said connecting member and being biased downwardly against said trunnions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |