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US 5,839,341 AGranted
Punch unit
AssigneeMate Precision Tooling, Inc.
InventorsGary E. Johnson, Richard J. Schweiger
Life of this patent
Estimating the term…
Abstract
A punch unit allows an adjustable length adjustment of the punch by disengaging projection-seat means which connect the housing and the guide bushing and then rotating the guide bushing relative to the housing. Additionally, the housing has mutually engaging housing top and bottom parts that have engaging fingers and corresponding grooves that cooperate during punching. The connection between the housing and guide bushing includes a C-ring, attached to the housing, having protrusions which are biased to engage a groove located on the guide bushing.
Claims26
A punch unit comprising:
- a housing;
- a punch driver axially received in said housing;
- a guide bushing, the guide bushing being connected to said housing so as to be rotational relative thereto;
- connecting means for connecting the guide bushing to the housing, said connecting means comprising radial protrusions secured to the housing and disposed within a circumferential groove on the guide bushing so as to restrict disengagement of the guide bushing and the housing;
- a punch mounted in the guide bushing against rotational movement relative thereto, the punch being adjacent to the punch driver;
- spring means biasing the punch driver axially away from the guide bushing;
- and
- indexing means for rotationally positioning the guide bushing relative to the housing, said indexing means comprising spring biased means on one of the guide bushing or housing engaging a recess in the other of the guide bushing or housing, such that, (1) during normal operation of the punch unit, in the engaged position of the spring biased means, the housing and the guide bushing remain fixed rotationally with respect to each other and (2) for adjustment purposes, disengagement of the spring biased means allows for rotation of the guide bushing and housing relative to each other to adjust the combined length of the punch and punch driver.
5 more elements
A punch unit comprising:
- a housing;
- a punch driver axially received in said housing;
- a guide bushing connected to said housing so as to be rotational relative thereto;
- a punch mounted in the guide bushing against rotational movement relative thereto, the punch being operably attached to the punch driver;
- spring means biasing the punch driver axially away from the guide bushing;
- and
- indexing means for rotationally positioning the guide bushing relative to the housing, said indexing means comprising opposed facing radial surfaces on the housing and guide bushing, at least one projection in one of said facing radial surfaces selectively engaging or disengaging at least one recess in the other of said facing radial surfaces, such that (1) during normal operation of the punch unit the projection engages said recess to prevent rotation of the housing and guide bushing relative to each other and (2) with the projection disengaged from the recess, the housing and guide bushing are rotatable relative to each other to adjust the combined length of the punch and the punch driver, said projection being axially movable with respect to the housing or the guide bushing in which it is located such that it is removable from said recess by positive axial movement of said projection out of said recess.
4 more elements
A punch unit comprising:
- a housing including a pair of axially relatively moving parts;
- a punch driver axially received in said housing;
- a guide bushing, the guide bushing being connected to said housing so as to be rotational relative thereto;
- a punch mounted in the guide bushing against rotational movement relative thereto, the punch being operably attached to the punch driver;
- spring means for biasing the punch driver axially away from the guide bushing;
- and
- a cooperating ring that cooperates with said pair of relatively moving parts, wherein said moving parts move towards each other in response to a punch stroke and compression of said spring means, and said cooperating ring restricts movement of said moving parts toward each other upon compression of the spring, and away from each other upon release of the spring.
4 more elements
Dependencies are inferred from the claim text.