Patent US3759536A successfully refreshed from Google Patents.
US3759536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the quick change of toolholders
Assignee: Individual
•
Filing: 1971-06-17
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Granted: 1973-09-18
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Expires: 1991-06-17
Abstract
Abstract A device for the quick change of toolholders comprises a support having a conical recess receiving a conical member that has a neck having a T-shaped head. The support has a washer with a slot disposed at right angles to the head and through which the head can pass only upon rotation through 90*. A nut is screwthreadedly received in the support and receives the T-shaped head through a slot through which the head falls upon rotation of the nut followed by pressure of the nut against the head in a disengaging direction. The T-shaped head falls on the washer, and the conical portion is rotated 90* to withdraw the head through the washer slot.
Inventors
- 👤 B Bronzini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:17
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/04; B23B29/08; B23B29/10; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17863; Y10T279/17957; Y10T279/17965; Y10T279/34; Y10T279/3481; Y10T409/00; Y10T409/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
A device for the quick change of a toolholder, comprising a support having a conical recess therein, a conical member releasably disposed in the recess and having a neck having a Tshaped head thereon, a nut screw-threadedly received in said support axially of said nEck, said nut having a recess therein that receives said T-shaped head with axial clearance, said nut having a first slot through which said T-shaped head passes in only one position of rotation of said head and nut relative to each other, said support having a second T-shaped slot therein through which said head passes only after said head has passed through said first slot and has been rotated about its axis through a predetermined angle.
Claim 2
Independent Claim
120 words
A device for the quick change of a toolholder, comprising a support having a conical recess therein, a conical member releasably disposed in the recess and having a neck having a Tshaped head thereon, a nut screw-threadedly received in said support axially of said nEck, said nut having a recess therein that receives said T-shaped head with axial clearance, said nut having a first slot through which said T-shaped head passes in only one position of rotation of said head and nut relative to each other, said support having a second T-shaped slot therein through which said head passes only after said head has passed through said first slot and has been rotated about its axis through a predetermined angle.
Claim 3
Dependent Claim
14 words
A device as claimed in claim 1, and a handle secured to said nut.
Claim 4
Dependent Claim
23 words
A device as claimed in claim 1, and a screw-threaded bolt that extends axially through said nut into said recess in said nut.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |