Patent US3686964A successfully refreshed from Google Patents.
US3686964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool holders with controlled tool movement
Assignee: Renault SA
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Filing: 1970-04-13
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Granted: 1972-08-29
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Expires: 1990-04-13
Abstract
Abstract A control system for a tool holder which is attached to one of a pair of elements which are hinged together at one end and are normally urged toward each other at the other end. A control member such as a push rod extends through a hole in the other of the elements and actuates a lever in a chamber between the two elements. The end of the lever away from the control member is held between two relatively closely spaced fulcrum points on the two elements so that a given movement of the control member results in a substantially reduced corresponding arcuate movement being transmitted to the element carrying the tool holder. Preferably the lever has a pair of opposite blind passages having partially overlapping cross-sectional contours with a wafer of resilient plastic material interposed in the bottoms of these passages, and with bearing studs connected to the two elements being received in the passages and engaging on opposite sides of the wafer.
Inventors
- 👤 Christian Thibaut
- 👤 Andre Ballini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:02
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03432; B23B29/03457; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/48; Y; Y10; Y10T; Y10T408/00; Y10T408/83; Y10T408/85; Y10T408/858; Y10T408/8595; Y10T408/86; Y10T74/00; Y10T74/18; Y10T74/18992; Y10T74/20; Y10T74/20006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
138 words
A tool holder control apparatus comprising a pair of elements forming a chamber therebetween, means connecting said elements to allow angular movement of the elements relative to each other against a resilient force normally urging the elements towards each other, a tool holder connected to one of said elements, a lever disposed in said chamber and adjacent one end being disposed between a pair of relatively closely spaced fulcrum points at adjacent inner surfaces of said elements, the other of said elements being provided with an aperture adjacent the other end of said lever, means for supporting the tool holder connected to said other element, and control means extending through said aperture into operative engagement with said lever so that a linear movement of said control means results in a corresponding scaled down angular movement between said elements.
Claim 2
Dependent Claim
138 words
A tool holder control apparatus comprising a pair of elements forming a chamber therebetween, means connecting said elements to allow angular movement of the elements relative to each other against a resilient force normally urging the elements towards each other, a tool holder connected to one of said elements, a lever disposed in said chamber and adjacent one end being disposed between a pair of relatively closely spaced fulcrum points at adjacent inner surfaces of said elements, the other of said elements being provided with an aperture adjacent the other end of said lever, means for supporting the tool holder connected to said other element, and control means extending through said aperture into operative engagement with said lever so that a linear movement of said control means results in a corresponding scaled down angular movement between said elements.
Claim 3
Dependent Claim
25 words
Apparatus according to claim 1, wherein said means connecting said elements comprises a resilient hinge, said elements and said resilient hinge comprising an integral body.
Claim 4
Dependent Claim
57 words
Apparatus according to claim 1, wherein said lever is provided with a pair of opposed blind passages having partially overlapping cross-sectional contours, a wafer of resilient plastic material disposed within said passages, and a pair of bearing studs extending into said passages to bear against said wafer, the other ends of said studs constituting said fulcrum points.
Claim 5
Dependent Claim
22 words
Apparatus according to claim 3, wherein one of said studs engages the element connected to the tool holder through a bearing ball.
Claim 6
Dependent Claim
35 words
Apparatus according to claim 3, including an additional lever pivotally mounted between said elements and directly contacted by said control means, said additional lever having a member to engage said lever adjacent one end thereof.
Claim 7
Dependent Claim
70 words
Apparatus according to claim 5, wherein said additional lever is pivoted to transverse trunnions carried by a means parallel to said control rod, said rod being mounted between said elements by means including a resilient plastic ring fitting into a recess provided in one of said elements and by spring means to compress said ring in order to compensate for any expansion of said wafer by expansion of said ring.
Claim 8
Dependent Claim
13 words
Apparatus according to claim 1, wherein said control means directly contacts said lever.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |