Patent US3900937A successfully refreshed from Google Patents.
US3900937A
Expired / Lapsed
US
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Spot clinch means and method
Assignee: Individual
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Filing: 1974-08-05
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Granted: 1975-08-26
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Expires: 1994-08-05
Abstract
Abstract Spot clinch method for forming a spot clinch joint by lancing and swaging two or more materials together using one complete stroke of a power source in a single station, the power source having a power stroke and a retract stroke, said method utilizing an anvil, die and punch, said method comprising moving either the punch or anvil while maintaining the other stationary during the complete stroke of the power source, moving one of the punch and anvil toward the other during a first part of the power stroke, lancing the materials by piercing them with the punch and die during a second part of the power stroke, holding the die in a first position spaced from the anvil during both the first and second parts of the power stroke, moving the die to a second position in respect to the anvil during a third part of the power stroke, swaging the lanced portion of the materials during a fourth and final part of the power stroke, maintaining the die and the anvil in the second position during the fourth and final part of the power stroke and during a first part of the retract stroke, and moving the die relative to the anvil from the second position to the first position during a second and final part of the retract stroke.
Inventors
- 👤 Louis C Schleicher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:39
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/03; B21D39/035; Y; Y10; Y10T; Y10T29/00; Y10T29/34; Y10T29/49; Y10T29/49826; Y10T29/49833; Y10T29/49908; Y10T29/49915; Y10T29/49936; Y10T29/49938; Y10T29/51; Y10T29/5147; Y10T29/5148; Y10T29/53; Y10T29/53996
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
241 words
Spot clinch tool for forming a spot clinch joint by lancing and swaging two or more materials together using one complete stroke of a power source in a single station, said power source having a power stroke and a retract stroke, said tool utilizing an anvil, die and punch means for moving one of said punch and anvil while maintaining the other stationary during said complete stroke of said power source, means for moving one of said punch and anvil toward the other during a first part of said power stroke, means for piercing said materials with said punch and die to lance them during a second part of said power stroke, means for holding the die in a first position spaced from the anvil during both said first and second parts of said power stroke, means for moving the die to a second position in respect to said anvil during a third part of said power stroke, means for swaging the lanced portions of said materials with said punch and anvil during a fourth and final part of said power stroke, means for maintaining the die and the anvil in said second position during said fourth and final part of said power stroke and during a first part of said retract stroke, and means for moving said die relative to said anvil from said second position to said first position during a second and final part of said retract stroke.
Claim 2
Dependent Claim
241 words
Spot clinch tool for forming a spot clinch joint by lancing and swaging two or more materials together using one complete stroke of a power source in a single station, said power source having a power stroke and a retract stroke, said tool utilizing an anvil, die and punch means for moving one of said punch and anvil while maintaining the other stationary during said complete stroke of said power source, means for moving one of said punch and anvil toward the other during a first part of said power stroke, means for piercing said materials with said punch and die to lance them during a second part of said power stroke, means for holding the die in a first position spaced from the anvil during both said first and second parts of said power stroke, means for moving the die to a second position in respect to said anvil during a third part of said power stroke, means for swaging the lanced portions of said materials with said punch and anvil during a fourth and final part of said power stroke, means for maintaining the die and the anvil in said second position during said fourth and final part of said power stroke and during a first part of said retract stroke, and means for moving said die relative to said anvil from said second position to said first position during a second and final part of said retract stroke.
Claim 3
Dependent Claim
213 words
Spot clinch tool as claimed in claim 1 in which said anvil is maintained stationary during said complete stroke of said power source and further comprising a toggle mechanism, said toggle mechanism moveable during said complete stroke of said power source for moving said punch in a substantially harmonic motion in respect to said anvil during said complete stroke of said power source, said toggle mechanism achieving first and second force multiplications at said punch of the force of said power source during said lancing and swaging steps, respectively, cam means, cam actuator means for actuating said cam means, said cam actuator means operative during movement of said toggle mechanism, said cam means and said cam actuator means together holding said die stationary in said first position during both said first and second parts of said power stroke and moving said die to said second position during said third part of said power stroke and maintaining said die stationary in said second position during said fourth and final part of said power stroke and during said first part of said retract stroke, and moving said die from said second position to said first position and maintaining said die stationary in said first position during said second and final part of said retract stroke.
Claim 4
Dependent Claim
74 words
Spot clinch tool as claimed in claim 2, said cam means having a depression formed therein so that during said first part of said retract stroke said cam means remains stationary during movement of said cam actuator means to maintain said die stationary to permit movement of the punch away from the anvil during said first part of said retract stroke and prior to final movement of said die to its initial starting position.
Claim 5
Dependent Claim
58 words
Spot clinch tool as claimed in claim 2 further comprising, cam follower Means operative upon said cam means, a die retainer means for holding said die, said cam follower means fast in respect to said die retainer means, and yieldable means operative upon said die retainer means for maintaining said cam follower means biased against said cam means.
Claim 6
Dependent Claim
224 words
Spot clinch method for forming a spot clinch joint by lancing and swaging two or more materials together using one complete stroke of a power source in a single station, said power source having a power stroke and a retract stroke, said method utilizing an anvil, die and punch, said method comprising moving one of said punch and anvil while maintaining the other stationary during said complete stroke of said power source, moving said one of said punch and anvil toward the other during a first part of said power stroke, lancing said materials by piercing them with said punch and die during a second part of said power stroke, holding the die in a first position spaced from the anvil during both said first and second parts of said power stroke, moving the die to a second position in respect to said anvil during a third part of said power stroke, swaging the lanced portion of said materials during a fourth and final part of said power stroke, maintaining the die and the anvil in said second position during said fourth and final part of said power stroke and during a first part of said retract stroke, and moving said die relative to said anvil from said second position to said first position during a second and final part of said retract stroke.
Claim 7
Dependent Claim
224 words
Spot clinch method for forming a spot clinch joint by lancing and swaging two or more materials together using one complete stroke of a power source in a single station, said power source having a power stroke and a retract stroke, said method utilizing an anvil, die and punch, said method comprising moving one of said punch and anvil while maintaining the other stationary during said complete stroke of said power source, moving said one of said punch and anvil toward the other during a first part of said power stroke, lancing said materials by piercing them with said punch and die during a second part of said power stroke, holding the die in a first position spaced from the anvil during both said first and second parts of said power stroke, moving the die to a second position in respect to said anvil during a third part of said power stroke, swaging the lanced portion of said materials during a fourth and final part of said power stroke, maintaining the die and the anvil in said second position during said fourth and final part of said power stroke and during a first part of said retract stroke, and moving said die relative to said anvil from said second position to said first position during a second and final part of said retract stroke.
Claim 8
Dependent Claim
127 words
Spot clinch method as claimed in claim 1 in which said anvil is maintained stationary and said punch is moved in a substantially harmonic motion in respect to said anvil during said complete stroke of said power source, and in which said die is held stationary in said first position during both said first and second parts of said power stroke and moved to said second position during said third part of said power stroke and maintained stationary in said second position during said fourth and final part of said power stroke and during said first part of said retract stroke, and moved from said second to said first position and maintained stationary in said first position during said second and final part of said retract stroke.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |