Patent US3661376A successfully refreshed from Google Patents.
US3661376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support having three axes of adjustment and a single locking handle
Assignee: Individual
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Filing: 1970-04-09
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Granted: 1972-05-09
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Expires: 1990-04-09
Abstract
Abstract A work support device has a base structure, a split carrier rotatably mounted on the base structure, a post, and a split bushing for releasably receiving the post and for selectively gripping the post. The split bushing is mounted within the split carrier for turning movement about an axis, and the split carrier, the split bushing and the post are selectively arrestable and subsequently releasable upon actuation of a single clamp device. To increase the range of adjustment, and decrease the requisite power for adjustment and adjustment friction, a leaf spring is provided in force transmitting relationship with the split bushing and resiliently bendable toward the split bushing at the above mentioned axis of movement of the split bushing. The clamp device then includes a bolt which has a certain cross-section and a tip portion which is in force transmitting relationship with the leaf spring within an area of force transmission that is several times smaller than the bolt cross-section and that has a center located substantially on the axis of movement of the split bushing.
Inventors
- 👤 Dwight A Hill
- 👤 Otto F Colbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:44
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/26; B23Q1/28; B23Q1/44; B23Q1/50; B23Q1/54; B23Q1/5406; B23Q1/5412
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
189 words
A work support device comprising in combination: a base structure; a split carrier rotatably mounted on the base structure; a post; a split bushing for releasably receiving said post and for selectively gripping said post, said split bushing being mounted within said split carrier for turning movement about an axis; a leaf spring having peripheral portions in force transmitting relationship with said bushing and spaced from said split carrier, and having a central portion biased away from said bushing at said axis; and adjustable clamp means in force transmitting relationship with said split carrier and said leaf spring for selectively actuating the split carrier into locking engagement with the base, and the split bushing into locking engagement with the split carrier and gripping engagement with the post, said adjustable clamp means including a bolt having substantially a predetermined cross-section and being threaded into said split carrier, said bolt extending substantially along said axis and having a tip portion in force transmitting relationship with said leaf spring within an area of force transmission being several times smaller than said bolt cross-section and having a center located substantially on said axis.
Claim 2
Dependent Claim
189 words
A work support device comprising in combination: a base structure; a split carrier rotatably mounted on the base structure; a post; a split bushing for releasably receiving said post and for selectively gripping said post, said split bushing being mounted within said split carrier for turning movement about an axis; a leaf spring having peripheral portions in force transmitting relationship with said bushing and spaced from said split carrier, and having a central portion biased away from said bushing at said axis; and adjustable clamp means in force transmitting relationship with said split carrier and said leaf spring for selectively actuating the split carrier into locking engagement with the base, and the split bushing into locking engagement with the split carrier and gripping engagement with the post, said adjustable clamp means including a bolt having substantially a predetermined cross-section and being threaded into said split carrier, said bolt extending substantially along said axis and having a tip portion in force transmitting relationship with said leaf spring within an area of force transmission being several times smaller than said bolt cross-section and having a center located substantially on said axis.
Claim 3
Dependent Claim
39 words
A work support device as claimed in claim 1, wherein: said leaf spring comprises a resilient disc being peripherally in force transmitting engagement with said split bushing and having at least a center portion spaced from said split bushing.
Claim 4
Dependent Claim
38 words
A work support device as claimed in claim 2, wherein: said spaced center portion of the resilient disc is located on said axis; and said tip portion of said bolt engages the resilient disc at said center portion.
Claim 5
Dependent Claim
21 words
A work support device as claimed in claim 1, wherein: said tip portion is integral with and projects from said bolt.
Claim 6
Dependent Claim
22 words
A work support device as claimed in claim 1, wherein: said bolt has a convexly shaped end culminating in said tip portion.
Claim 7
Dependent Claim
40 words
A work support device as claimed in claim 1, wherein: said leaf spring is substantially cylindrically bent and has peripheral portions in force transmitting engagement with said split bushing and an elongate central portion biased away from said split bushing.
Claim 8
Dependent Claim
34 words
A work support device as claimed in claim 6, wherein: said biased central portion of the leaf spring extends through said axis; and said tip portion of said bolt engages said biased central portion.
Claim 9
Dependent Claim
22 words
A work support device as claimed in claim 7, wherein: said bolt has a convexly shaped end culminating in said tip portion.
Claim 10
Dependent Claim
67 words
A work support device as claimed in claim 1, wherein: said leaf spring comprises a resilient disc being substantially cylindrically bent and having peripheral portions in force transmitting engagement with said split bushing and an elongate central portion biased way from said split bushing and extending through said axis; and said tip portion of said bolt engages said central portion of said resilient disc at said axis.
Claim 11
Dependent Claim
39 words
A work support device as claimed in claim 1, wherein: said leaf spring is constructed and positioned to be selectively movable into substantially rigid engagement with said split bushing by action of said bolt tip on the leaf spring.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |