US3762264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool holder for punches and the like
Assignee: WHITNEY CORP W
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Filing: 1971-09-29
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Granted: 1973-10-02
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Expires: 1991-09-29
Abstract
Abstract The holder includes a collar within which a punch is clamped by radially movable jaws. The jaws are shifted radially into clamping engagement with the punch by fluid-operated actuators which extend axially of the collar.
Inventors
- 👤 W Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:44
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/34; B21D37/00; B21D37/04; B30; B30B; B30B15/00; B30B15/02; B30B15/026; Y; Y10; Y10T; Y10T279/00; Y10T279/12; Y10T279/1274; Y10T279/1291; Y10T279/17; Y10T279/17863; Y10T83/00; Y10T83/929; Y10T83/9457; Y10T83/9473; Y10T83/9476
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
232 words
The combination of a vertically reciprocable ram and a holder for a punch, said holder comprising an upright collar secured at its upper end to the lower end of said ram and having an axially extending bore opening out of its lower end for receiving said punch, angularly spaced jaws projecting into said bore and mounted for in and out radial sliding between clamped positions engaging said punch and released positions spaced outwardly from said punch, springs mounted in said collar and urging said jaws outwardly toward said released positions, angularly spaced cylinders extending axially of said collar and spaced radially outwardly of said bore, fluid-operated actuators guided in said cylindeRs for axial reciprocation and operable when reciprocated to cause movement of said jaws between said positions, said cylinders having open upper ends opening upwardly out of the upper end of said collar and closed off by the lower end of said ram, a passage extending axially within said ram and communicating with a pressure source for delivering pressure fluid into the passage, and angularly spaced slots extending generally radially across the upper end of said collar and communicating between said passage and the upper ends of said cylinders to deliver pressure fluid into the cylinders, said slots opening upwardly out of the upper end of said collar and having their upper sides closed off by the lower end of said ram.
Claim 2
Dependent Claim
232 words
The combination of a vertically reciprocable ram and a holder for a punch, said holder comprising an upright collar secured at its upper end to the lower end of said ram and having an axially extending bore opening out of its lower end for receiving said punch, angularly spaced jaws projecting into said bore and mounted for in and out radial sliding between clamped positions engaging said punch and released positions spaced outwardly from said punch, springs mounted in said collar and urging said jaws outwardly toward said released positions, angularly spaced cylinders extending axially of said collar and spaced radially outwardly of said bore, fluid-operated actuators guided in said cylindeRs for axial reciprocation and operable when reciprocated to cause movement of said jaws between said positions, said cylinders having open upper ends opening upwardly out of the upper end of said collar and closed off by the lower end of said ram, a passage extending axially within said ram and communicating with a pressure source for delivering pressure fluid into the passage, and angularly spaced slots extending generally radially across the upper end of said collar and communicating between said passage and the upper ends of said cylinders to deliver pressure fluid into the cylinders, said slots opening upwardly out of the upper end of said collar and having their upper sides closed off by the lower end of said ram.
Claim 3
Dependent Claim
36 words
The combination defined in claim 1 in which said actuators comprise rods guided in said collar for axial reciprocation and engageable with said jaws, and pistons connected to said rods and slidably received within said cylinders.
Claim 4
Dependent Claim
216 words
A holder for a tool, said holder comprising a collar having an axially extending bore opening out of one of its ends for receiving said tool a slot extending radially through said collar and communicating with said bore, angularly spaced and generally T-shaped jaws mounted in said slot for in and out radial sliding between clamped positions in engagement with said tool and released positions spaced outwardly from said tool, crosspieces formed on the outer ends of said jaws and received in the end portions of the slot, springs mounted in said collar and urging said jaws outwardly toward said released positions, there being two springs associated with each jaw with each pair of springs being compressed between said collar and the end portions of the respective crosspiece, reversible actuators guided in said collar for axial reciprocation and operable when moved axially in one direction to shift said jaws radially inwardly to said clamped positions, there being a notch formed in the midportion of each crosspiece between said springs and receiving the respective actuator, the outwardly facing surface of each notch defining an inclined wedge surface, and mating surfaces on said actuators and engageable with said wedge surfaces to cam said jaws inwardly when said actuators are moved to shift said jaws to said clamped positions.
Claim 5
Dependent Claim
216 words
A holder for a tool, said holder comprising a collar having an axially extending bore opening out of one of its ends for receiving said tool a slot extending radially through said collar and communicating with said bore, angularly spaced and generally T-shaped jaws mounted in said slot for in and out radial sliding between clamped positions in engagement with said tool and released positions spaced outwardly from said tool, crosspieces formed on the outer ends of said jaws and received in the end portions of the slot, springs mounted in said collar and urging said jaws outwardly toward said released positions, there being two springs associated with each jaw with each pair of springs being compressed between said collar and the end portions of the respective crosspiece, reversible actuators guided in said collar for axial reciprocation and operable when moved axially in one direction to shift said jaws radially inwardly to said clamped positions, there being a notch formed in the midportion of each crosspiece between said springs and receiving the respective actuator, the outwardly facing surface of each notch defining an inclined wedge surface, and mating surfaces on said actuators and engageable with said wedge surfaces to cam said jaws inwardly when said actuators are moved to shift said jaws to said clamped positions.
Claim 6
Dependent Claim
55 words
The combination defined in claim 2 in which inclined wedge surfaces are formed on the outer ends of said jaws, and mating surfaces formed on the free ends of said rods and engageable with said wedge surfaces to cam said jaws inwardly when said rods are moved to shift said jaws to said clamped positions.
Claim 7
Dependent Claim
65 words
The combination defined in claim 1 in which said collar is formed with a radially extending slot slidably receiving said jaws, crosspieces formed on the outer ends of said jaws and received in end portions of the last-mentioned slot, there being two springs associated with each jaw with each pair of springs being compressed between said collar and the end portions of the respective crosspiece.
Claim 8
Dependent Claim
65 words
The combination defined in claim 5 in which a notch is formed in the midportion of each crosspiece and receives the respective actuator, the outwardly facing surface of each notch defining an inclined wedge surface, and mating surfaces on said actuators and engageable with said wedge surfaces to cam said jaws inwardly when said actuators are moved to shift said jaws to said clamped positions.
Claim 9
Dependent Claim
22 words
The combination defined in claim 1 in which said jaws are formed with arcuate clamping faces which are inclined downwardly and outwardly.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |