US3719117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Punch holder
Assignee: Individual
•
Filing: 1971-07-29
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Granted: 1973-03-06
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Expires: 1991-07-29
Abstract
Abstract A punch press includes a tubular punch holder telescoped on the lower end of a reciprocable ram for up and down movement between (a) a clamped position in which the end of the ram holds a punch locked within the holder and (b) a released position in which the end of the ram is retracted upwardly relative to the holder to allow the punch to be removed from the holder. Formed in the side of the holder is an entryway correlated in size and shape to that of the punch so that the punch may be inserted into and removed from the holder by being moved radially in and out of the holder when the latter is in the released position.
Inventors
- 👤 R Mauk
- 👤 W Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:08
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/34; Y; Y10; Y10T; Y10T279/00; Y10T279/21; Y10T279/34; Y10T279/3487; Y10T403/00; Y10T403/61; Y10T83/00; Y10T83/929; Y10T83/9457; Y10T83/9473; Y10T83/9476
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
256 words
A punching machine for reciprocating an upright punch unit having an elongated shank with an enlarged head at the upper end thereof, said machine comprising a ram adapted for up and down reciprocation, a tubular punch holder having an axial passage therethrough and telescoped over said ram with the lower end of the ram projecting into said passage, an elongated slot formed through one side of said holder, an enlarged opening formed through said holder at the upper end of said slot, the size and shape of said slot and opening being correlated with the size and shape of said shank and head, respectively, to permit movement of said punch unit radially into said punch holder, mating seats on said punch unit and the inner side of said punch holder and engageable with one another to limit axial movement of the punch unit downwardly within said holder, and means mounting said punch holder on the lower end of the ram for reciprocation with the ram and also for selective axial movement relative to the ram between (a) a clamped position in which the end of said ram closes off at least the upper end portion of said opening, engages the head of said punch unit and forces said seats into engagement to lock said punch unit in said holder, and (b) a released position in which the end of the ram releases said head and opens up said upper end portion of said opening to permit radial movement of said punch unit out of said holder.
Claim 2
Dependent Claim
256 words
A punching machine for reciprocating an upright punch unit having an elongated shank with an enlarged head at the upper end thereof, said machine comprising a ram adapted for up and down reciprocation, a tubular punch holder having an axial passage therethrough and telescoped over said ram with the lower end of the ram projecting into said passage, an elongated slot formed through one side of said holder, an enlarged opening formed through said holder at the upper end of said slot, the size and shape of said slot and opening being correlated with the size and shape of said shank and head, respectively, to permit movement of said punch unit radially into said punch holder, mating seats on said punch unit and the inner side of said punch holder and engageable with one another to limit axial movement of the punch unit downwardly within said holder, and means mounting said punch holder on the lower end of the ram for reciprocation with the ram and also for selective axial movement relative to the ram between (a) a clamped position in which the end of said ram closes off at least the upper end portion of said opening, engages the head of said punch unit and forces said seats into engagement to lock said punch unit in said holder, and (b) a released position in which the end of the ram releases said head and opens up said upper end portion of said opening to permit radial movement of said punch unit out of said holder.
Claim 3
Dependent Claim
256 words
A punching machine for reciprocating an upright punch unit having an elongated shank with an enlarged head at the upper end thereof, said machine comprising a ram adapted for up and down reciprocation, a tubular punch holder having an axial passage therethrough and telescoped over said ram with the lower end of the ram projecting into said passage, an elongated slot formed through one side of said holder, an enlarged opening formed through said holder at the upper end of said slot, the size and shape of said slot and opening being correlated with the size and shape of said shank and head, respectively, to permit movement of said punch unit radially into said punch holder, mating seats on said punch unit and the inner side of said punch holder and engageable with one another to limit axial movement of the punch unit downwardly within said holder, and means mounting said punch holder on the lower end of the ram for reciprocation with the ram and also for selective axial movement relative to the ram between (a) a clamped position in which the end of said ram closes off at least the upper end portion of said opening, engages the head of said punch unit and forces said seats into engagement to lock said punch unit in said holder, and (b) a released position in which the end of the ram releases said head and opens up said upper end portion of said opening to permit radial movement of said punch unit out of said holder.
Claim 4
Dependent Claim
256 words
A punching machine for reciprocating an upright punch unit having an elongated shank with an enlarged head at the upper end thereof, said machine comprising a ram adapted for up and down reciprocation, a tubular punch holder having an axial passage therethrough and telescoped over said ram with the lower end of the ram projecting into said passage, an elongated slot formed through one side of said holder, an enlarged opening formed through said holder at the upper end of said slot, the size and shape of said slot and opening being correlated with the size and shape of said shank and head, respectively, to permit movement of said punch unit radially into said punch holder, mating seats on said punch unit and the inner side of said punch holder and engageable with one another to limit axial movement of the punch unit downwardly within said holder, and means mounting said punch holder on the lower end of the ram for reciprocation with the ram and also for selective axial movement relative to the ram between (a) a clamped position in which the end of said ram closes off at least the upper end portion of said opening, engages the head of said punch unit and forces said seats into engagement to lock said punch unit in said holder, and (b) a released position in which the end of the ram releases said head and opens up said upper end portion of said opening to permit radial movement of said punch unit out of said holder.
Claim 5
Dependent Claim
26 words
A punching machine as defined by claim 1 including an operator for moving said holder axially relative to the ram between said clamped and released positions.
Claim 6
Dependent Claim
14 words
A punching machine as defined by claim 2 wherein said operator is power actuated.
Claim 7
Dependent Claim
46 words
A punching machine as defined by claim 2 wherein said mounting means includes a carrier connected between the ram and the holder and being movable axially relative to the end of the ram by said operator to carry said holder between said clamped and released positions.
Claim 8
Dependent Claim
122 words
A punching machine as defined by claim 4 wherein said holder includes an outer flange at a periphery of the upper end of the holder, said carrier being a collar with a generally horizontal annular lip on the lower end of the collar positioned to engage the lower surface of the flange and limit movement of said holder downwardly within the collar, a threaded upper end portion on the collar and holding the collar on the ram so that the collar may be turned to move axially relative to the lower end of the ram, and gear teeth on said upper end portion for engagement with said operator to be turned thereby to move said holder between said clamped and released positions.
Claim 9
Dependent Claim
33 words
A punching machine as defined by claim 4 in which said operator is power actuated and further including of means for automatically deactivating the operator once said holder is moved into said positions.
Claim 10
Dependent Claim
92 words
A punching machine as defined by claim 6 wherein said last-mentioned means includes a switch housing mounted on said ram above said carrier, first and second limit switches mounted within said housing, and first and second cams mounted within said housing and movable vertically with said carrier, said first cam actuating the first limit switch to deactivate said operator when said carrier moves the holder into said clamped position, and said second cam actuating the second limit switch to deactivate said operator when the carrier moves the holder into said release position.
Claim 11
Dependent Claim
38 words
A punching machine as defined by claim 1 further including means for holding said punch holder angular movement relative to the end of the ram and for holding said punch unit against angular movement relative to said holder.
Claim 12
Dependent Claim
53 words
A punching machine as defined by claim 8 wherein said holding means includes a key fastened to the side of the ram, and a longitudinal keyway formed in the inner wall of said punch holder to receive said key and prevent the holder from moving angularly relative to the end of the ram.
Claim 13
Dependent Claim
52 words
A punching machine as defined by claim 9 wherein the enlarged head of said punch unit includes a notch to hold said key extending past the end of the ram to fit within said notch to hold said unit against angular movement relative to said holder and the end of the ram.
Claim 14
Dependent Claim
159 words
A punching machine as defined by claim 1 wherein said punch unit includes a punch with an elongated body having an enlarged upper end portion, said body being substantially smaller than the slot and opening in the side of the holder, the diameter of said enlarged upper end portion being smaller than the smallest diameter of said axial passage, said punch unit further including an adapter sleeve with an entryway formed through one side thereof, said entryway conforming to the size and shape of said punch body to permit said tool to be moved radially into the adapter sleeve, holding surfaces on said punch and on the inside of said adapter sleeve and engageable with one another to limit axial movement of the punch downwardly within the sleeve, and a spacer mounted on top of the enlarged upper end portion of the punch with the top surface of the spacer substantially flush with the top edge of the sleeve.
Claim 15
Dependent Claim
45 words
A punching machine as defined by claim 11 including means for preventing relative angular movement of said punch holder, said adapter sleeve and said punch with respect to each other and with respect to said ram when mounted together on the end of the ram.
Claim 16
Dependent Claim
142 words
A punching machine as defined by claim 12 wherein said holding means includes a first key fastened to the side of the ram, a longitudinal keyway formed in the inner wall of said punch holder to receive said first key and hold the holder angularly oriented on the end of the ram, a first notch formed in the outside wall of said adapter sleeve, said key extending past the end of the ram to fit within said first notch to hold said adapter sleeve against angular movement relative to said holder and the end of the ram, a second key fastened to the inside wall of said adapter sleeve, a second notch formed in the enlarged upper end of the said punch, and said second key extending into said second notch to hold said punch against angular movement within said adapter sleeve.
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |