US3608601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Threaded lockwasher and method for fabrication thereof
Assignee: ELECTRICAL FITTINGS CORP
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Filing: 1969-05-16
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Granted: 1971-09-28
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Expires: 1989-05-16
Abstract
Abstract A lockwasher having tabs and gripping edges is made of a strip of coil stock material cut and wound a plurality of turns on a mandrel. A portion of at least one turn of the washer is axially displaced so at least one edge of the displaced portion is circumferentially aligned with a shoulder of an adjoining turn for preventing unwinding of the finished product.
Inventors
- 👤 Howard C Gohs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:37
CPC Classifications
F; F16; F16B; F16B43/00; F16B37/00; F16B37/02; F16B39/00; F16B39/22; F16B39/28; F16B39/282; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/956; Y10S411/957; Y10S411/959
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
144 words
A threaded lockwasher, comprising a plurality of turns of continuous lengthwise material forming a helix having a central opening, said turns being wound side by side in accordance with a screw thread convolution, said turns abutting each other, the lengthwise edge of the material forming the bore of said central opening having a beveled V-shaped edge to provide a screw thread along said opening, a series of tabs extending radially outward from the outer periphery of said turns and being extended down past the lowest one of said turns to provide biting edges at an angle with respect to a plane perpendicular to the axis of said central opening, and a generally inverted V-shaped portion of the periphery of one of said turns displaced axially so that opposite ends of the V-shaped portion are in general circumferential alignment with shoulders on an adjoining turn.
Claim 2
Dependent Claim
144 words
A threaded lockwasher, comprising a plurality of turns of continuous lengthwise material forming a helix having a central opening, said turns being wound side by side in accordance with a screw thread convolution, said turns abutting each other, the lengthwise edge of the material forming the bore of said central opening having a beveled V-shaped edge to provide a screw thread along said opening, a series of tabs extending radially outward from the outer periphery of said turns and being extended down past the lowest one of said turns to provide biting edges at an angle with respect to a plane perpendicular to the axis of said central opening, and a generally inverted V-shaped portion of the periphery of one of said turns displaced axially so that opposite ends of the V-shaped portion are in general circumferential alignment with shoulders on an adjoining turn.
Claim 3
Dependent Claim
113 words
A lockwasher, comprising a plurality of turns of continuous lengthwise material forming a helix having a central opening, said opening including screw thread means said turns being wound side by side in accordance with a screw thread convolution, said turns abutting each other, a series of toothed serrations extending radially from the outer periphery of said turns, each of said toothed serrations having an abutment for causing the lockwasher to turn around a cylindrical member when struck thereat, and a generally inverted V-shaped portion of the periphery of one of said turns displaced axially so that opposite ends of the V-shaped portion are in generally circumferential alignment with shoulders on an adjoining turn.
Claim 4
Dependent Claim
113 words
A lockwasher, comprising a plurality of turns of continuous lengthwise material forming a helix having a central opening, said opening including screw thread means said turns being wound side by side in accordance with a screw thread convolution, said turns abutting each other, a series of toothed serrations extending radially from the outer periphery of said turns, each of said toothed serrations having an abutment for causing the lockwasher to turn around a cylindrical member when struck thereat, and a generally inverted V-shaped portion of the periphery of one of said turns displaced axially so that opposite ends of the V-shaped portion are in generally circumferential alignment with shoulders on an adjoining turn.
Claim 5
Dependent Claim
188 words
A threaded lockwasher, comprising a plurality of turns of continuous lengthwise material forming a helix having a central opening, said turns being wound side by side in accordance with a screw thread convolution, said turns abutting each other, the lengthwise edge of the material forming the bore of said central opening having a beveled V-shaped edge to provide a screw thread along said opening, a series of tabs extending radially outward from the outer periphery of said turns and being extended down past the lower surface of its corresponding turn to provide biting edges at an angle with respect to a plane perpendicular to the axis of said central opening, the biting edges on the series of tabs on the lowest turn projecting axially beyond said lowest turn of said helix and each of said tabs includes a tool-striking edge, a portion of the periphery of said upper turn displaced axially into generally circumferential alignment with a lower one of said turns and a portion of said lower turn superposed with the displaced portion of said upper turn being correspondingly axially displaced and projecting beyond the lower turn.
Claim 6
Dependent Claim
188 words
A threaded lockwasher, comprising a plurality of turns of continuous lengthwise material forming a helix having a central opening, said turns being wound side by side in accordance with a screw thread convolution, said turns abutting each other, the lengthwise edge of the material forming the bore of said central opening having a beveled V-shaped edge to provide a screw thread along said opening, a series of tabs extending radially outward from the outer periphery of said turns and being extended down past the lower surface of its corresponding turn to provide biting edges at an angle with respect to a plane perpendicular to the axis of said central opening, the biting edges on the series of tabs on the lowest turn projecting axially beyond said lowest turn of said helix and each of said tabs includes a tool-striking edge, a portion of the periphery of said upper turn displaced axially into generally circumferential alignment with a lower one of said turns and a portion of said lower turn superposed with the displaced portion of said upper turn being correspondingly axially displaced and projecting beyond the lower turn.
Claim 7
Dependent Claim
27 words
A threaded lockwasher in accordance with claim 3, wherein said displaced portions of said upper and lower turns are in the form of an inverted V-shaped portion.
Claim 8
Dependent Claim
136 words
A lockwasher, comprising a plurality of turns of continuous lengthwise material forming a helix having a central opening, said turns being wound side by side in accordance with a screw thread convolution, said turns abutting each other, the lengthwise edge of the material forming the bore of said central opening having a screw thread along said opening, a series of toothed serrations extending radially from the outer periphery of said turns, each of said toothed serrations having an abutment for causing the lockwasher to turn around a cylindrical member when struck thereat, and a portion of the upper turn displaced axially into generally circumferential alignment with the lower one of said turns, and a portion of said lower turn superposed with the displaced portion of said upper turn displaced axially and projecting beyond the lower turn.
Claim 9
Dependent Claim
136 words
A lockwasher, comprising a plurality of turns of continuous lengthwise material forming a helix having a central opening, said turns being wound side by side in accordance with a screw thread convolution, said turns abutting each other, the lengthwise edge of the material forming the bore of said central opening having a screw thread along said opening, a series of toothed serrations extending radially from the outer periphery of said turns, each of said toothed serrations having an abutment for causing the lockwasher to turn around a cylindrical member when struck thereat, and a portion of the upper turn displaced axially into generally circumferential alignment with the lower one of said turns, and a portion of said lower turn superposed with the displaced portion of said upper turn displaced axially and projecting beyond the lower turn.
Claim 10
Dependent Claim
22 words
A lockwasher in accordance with claim 5, wherein the displaced portions of said turns are in the fOrm of an inverted V.
Claim 11
Dependent Claim
16 words
A lockwasher in accordance with claim 6, wherein opposite ends of said portions have opposite tapers.
References Cited (Backward Citations)
US3397726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |