Patent US4538313A successfully refreshed from Google Patents.
US4538313A
Expired / Lapsed
US
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Method of forming a joined pair of wedge-action lock washers
Assignee: NOBEX A CORP OF SWEDEN AB
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Filing: 1980-02-15
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Granted: 1985-09-03
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Expires: 2000-02-15
Abstract
Abstract A method of forming a joined pair fo wedge-action-type lock washers, wherein each lock washer has a cam surface and an oppositely disposed friction surface, the pair of washers being arranged so that their cam surfaces are installed in a juxtaposed face-to-face engagement, at which time the two lock washers are selectively joined together in such a manner as to allow lateral movement between each washer when rotational force is applied during the tightening of an associated fastening device.
Inventors
- 👤 Bengt O. Frieberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:58
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/16; B21D53/20; F; F16; F16B; F16B39/00; F16B39/22; F16B39/24; F16B11/00; F16B11/006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
131 words
A method of forming a single lock-washer unit composed of a pair of mating lock washers, comprising the steps of: forming a pair of washers, each having a frictional surface and an opposing cam surface; applying a releasable securing means to the cam surface of at least one washer thereof, said releasable securing means comprising a bonding material that allows the mating washers to be freely separated by the relative rotational forces applied to said washers; mating the opposing cam surfaces of each of said washers to form a signle lock-washer unit; said cam surfaces comprising a frontal cam wall and a rearwardly inclined cam surface; wherein the opposing frontal walls are spaced apart to allow movement therebetween; and selectively applying said bonding material to at least one inclined cam surface.
Claim 2
Independent Claim
131 words
A method of forming a single lock-washer unit composed of a pair of mating lock washers, comprising the steps of: forming a pair of washers, each having a frictional surface and an opposing cam surface; applying a releasable securing means to the cam surface of at least one washer thereof, said releasable securing means comprising a bonding material that allows the mating washers to be freely separated by the relative rotational forces applied to said washers; mating the opposing cam surfaces of each of said washers to form a signle lock-washer unit; said cam surfaces comprising a frontal cam wall and a rearwardly inclined cam surface; wherein the opposing frontal walls are spaced apart to allow movement therebetween; and selectively applying said bonding material to at least one inclined cam surface.
Claim 3
Independent Claim
131 words
A method of forming a single lock-washer unit composed of a pair of mating lock washers, comprising the steps of: forming a pair of washers, each having a frictional surface and an opposing cam surface; applying a releasable securing means to the cam surface of at least one washer, said releasable securing means comprising a bonding material that allows the mating washers to be freely separated by the relative rotational forces applied to said washers; mating the opposing cam surfaces of each of said washers to form a single lock-washer unit; said cam surfaces comprising a frontal cam wall and a rearwardly inclined cam surface; wherein the opposing frontal walls are spaced apart to allow movement therebetween; and selectively applying said bonding material to the outer peripheral walls of said washers.
Claim 4
Independent Claim
131 words
A method of forming a single lock-washer unit composed of a pair of mating lock washers, comprising the steps of: forming a pair of washers, each having a frictional surface and an opposing cam surface; applying a releasable securing means to the cam surface of at least one washer, said releasable securing means comprising a bonding material that allows the mating washers to be freely separated by the relative rotational forces applied to said washers; mating the opposing cam surfaces of each of said washers to form a single lock-washer unit; said cam surfaces comprising a frontal cam wall and a rearwardly inclined cam surface; wherein the opposing frontal walls are spaced apart to allow movement therebetween; and selectively applying said bonding material to the outer peripheral walls of said washers.
Claim 5
Independent Claim
98 words
A method of forming a single lock-washer unit composed of a pair of mating lock washers, comprising the steps of: forming a pair of washers, each having a frictional surface and an opposing cam surface; applying a releasable securing means to the cam surface of at least one washer thereof; and mating the opposing cam surfaces of each of said washers to form a single lock-washer unit; wherein said releasable securing means comprises a bonding material; and wherein said bonding material is a glue that permits the mating washers to be separated when rotational force is applied thereto.
Claim 6
Independent Claim
98 words
A method of forming a single lock-washer unit composed of a pair of mating lock washers, comprising the steps of: forming a pair of washers, each having a frictional surface and an opposing cam surface; applying a releasable securing means to the cam surface of at least one washer thereof; and mating the opposing cam surfaces of each of said washers to form a single lock-washer unit; wherein said releasable securing means comprises a bonding material; and wherein said bonding material is a glue that permits the mating washers to be separated when rotational force is applied thereto.
Claim 7
Independent Claim
98 words
A method of forming a single lock-washer unit composed of a pair of mating lock washers, comprising the steps of: forming a pair of washers, each having a frictional surface and an opposing cam surface; applying a releasable securing means to the cam surface of at least one washer thereof; and mating the opposing cam surfaces of each of said washers to form a signle lock-washer unit; wherein said releasable securing means comprises a bonding material; and wherein said bonding material is an adhesive that permits the mating washers to be separated when rotational force is applied thereto.
Claim 8
Independent Claim
98 words
A method of forming a single lock-washer unit composed of a pair of mating lock washers, comprising the steps of: forming a pair of washers, each having a frictional surface and an opposing cam surface; applying a releasable securing means to the cam surface of at least one washer thereof; and mating the opposing cam surfaces of each of said washers to form a signle lock-washer unit; wherein said releasable securing means comprises a bonding material; and wherein said bonding material is an adhesive that permits the mating washers to be separated when rotational force is applied thereto.
References Cited (Backward Citations)
GB514923A
Cited
DE2413760A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |