US4012030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixture for precision positioning of work pieces
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1975-09-10
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Granted: 1977-03-15
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Expires: 1995-09-10
Abstract
Abstract A fixture for holding of work pieces on a work table of a machine tool and for precision positioning of the work pieces in rotation and in translation. The fixture is held by springs pressing it against the work table and is thus floating on the work table but is adjustable in two directions relative to the table and rotatable relative thereto.
Inventors
- 👤 Tore Gottfrid Hesselgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:37
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/56; B23Q1/60; B23Q1/26; B23Q1/262; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/561; Y10T408/5617
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
190 words
A device for precision positioning of work pieces on the work table of a machine tool, said device comprising in combination: a fixture in the form of a substantially rectangular plate disposed parallel to the work table and rotatable and displaceable relative thereto in two non-linear directions; first spring means pressing the fixture against said work table; a bar disposed adjacent to one edge of said fixture parallel thereto and pivotal about one end; second spring means disposed at the edge of the fixture opposite to said one edge and biasing the fixture toward said bar for displacement of the fixture in one direction; a two-arm first lever, one arm being parallel to another edge of the fixture and the other arm underlying said bar for pressure coaction therewith in opposition to the second spring means, said first lever being pivotal about a point intermediate the two arms; and a first positioning means coacting with said one arm of the first lever for pivoting the other arm into pressure coaction with said bar for selectively pivoting the same thereby rotating the fixture against the action of the second spring means.
Claim 2
Independent Claim
190 words
A device for precision positioning of work pieces on the work table of a machine tool, said device comprising in combination: a fixture in the form of a substantially rectangular plate disposed parallel to the work table and rotatable and displaceable relative thereto in two non-linear directions; first spring means pressing the fixture against said work table; a bar disposed adjacent to one edge of said fixture parallel thereto and pivotal about one end; second spring means disposed at the edge of the fixture opposite to said one edge and biasing the fixture toward said bar for displacement of the fixture in one direction; a two-arm first lever, one arm being parallel to another edge of the fixture and the other arm underlying said bar for pressure coaction therewith in opposition to the second spring means, said first lever being pivotal about a point intermediate the two arms; and a first positioning means coacting with said one arm of the first lever for pivoting the other arm into pressure coaction with said bar for selectively pivoting the same thereby rotating the fixture against the action of the second spring means.
Claim 3
Dependent Claim
150 words
The device according to claim 1 and comprising a second bar interposed between the first bar and said one edge of the fixture, said second bar being lengthwise slidable relative to said first bar and said one edge of the fixture, said first bar having at the ends of its side facing the second bar slanted surfaces and said second bar having on the ends of its side facing the first bar protrusions engaging said slanted surfaces of the first bar, the opposite side of the second bar abutting against said one edge of the fixture whereby lengthwise displacement of the second bar relative to the first bar causes displacement of the fixture relative to the work table in one of said directions against the action of the second spring means; and a second positioning means coacting with one end of said second bar to effect selective lengthwise displacement thereof.
Claim 4
Dependent Claim
50 words
The device according to claim 2 and comprising third spring means coacting with said second bar at the other end thereof against the action of the second positioning means, and fourth spring means coacting with the first arm of the first lever against the action of the first positioning means.
Claim 5
Dependent Claim
96 words
The device according to claim 1 and comprising a second lever disposed adjacent to a third edge of said fixture, said second lever being pivotal about one end and engaging with one of its lengthwise sides said third edge of the fixture; a third positioning means on the second lever for selectively exerting pressure upon said third edge of the fixture, said pressure causing displacement of the fixture in the other of the two directions; and fourth spring means exerting pressure upon the fourth edge of the fixture against the action of the third positioning means.
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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |