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US 4,729,170 AGranted
Hand tool with perpendicular acting dies on pivoted handle set
OwnerRuben J. Hartmeisterinventor
Life of this patent
Estimating the term…
Abstract
A punch tool provides two generally longitudinal handles joined by a transverse pivot pin that is carried in a resilient bushing. One of the handles defines a straight bore that houses a sliding punch die and further defines a support for a mating, stationary die. The second handle is joined to the sliding die such that relative movement between the handles causes the sliding die to move within the bore, toward or away from the stationary die. Flexibility of the bushing permits the pivot pin to shift its axis longitudinally of the tool while permitting straight movement of the sliding die.
Claims9
A hand tool having perpendicular acting dies and pivoted handle lever, comprising:
- a first die housing defining therein a cavity for reception of a first die, the first die housing defining a transverse die pin bore across said cavity and further defining a transverse pivot pin bore offset longitudinally forwardly of the die pin bore and substantially parallel thereto;
- a second die support member spaced from the first die housing;
- a neck connecting the first die housing to the second die support member and defining a workpiece receiving space therebetween;
- a first longitudinally extending handle lever having side walls depending over opposite transverse sides of the first die housing and defining longitudinally spaced apart apertures in alignment with each of the pivot pin bore and die pin bore;
- a pivot pin received in the pivot pin bore and through the aligned apertures of said first handle lever, the diameter of the pivot pin being substantially smaller than the diameter of the pivot pin bore and leaving a substantial clearance between the pivot pin and the pivot pin bore wall;
- a resilient means received in said pivot pin bore for occupying said clearance and permitting radial deflection of the pivot pin with respect to the pivot pin bore wall;
- a first die having a stem supported in said cavity for axial sliding motion toward said second die support member and having a die pin connected to said stem and extending through said die pin bore and the aligned apertures of said first handle lever;
- whereby pivotal motion of said first handle lever on the pivot pin causes axial displacement of the first die with radial displacement of the pivot pin against said resilient means within the pivot pin bore.
5 more elements
A hand tool with perpendicular acting dies on a pivoted handle, comprising:
- a first handle lever;
- a second handle lever;
- a pivot pin bore defined through said first and second handle levers for common reception of a pivot pin;
- a pivot pin received in said pivot pin bore, wherein the diameter of the pivot pin bore within at least one of the handle levers is substantially larger than the diameter of the pivot pin;
- a resilient means supporting the pivot pin in said larger pivot pin bore for radial deflection;
- a first die;
- means carrying said first die for sliding motion with respect to the first handle lever along a die axis that is non-radial to the pivot pin bore and lies in a plane that is substantially normal to the axis of the pivot pin bore;
- and
- connecting means joining the second handle lever to the first die for inducing the die to move along the die axis in response to pivotal motion between the first and second handle levers, the resilient means permitting the pivot pin to radially deflect and permit straight motion of said connecting means.
6 more elements
A hand tool with perpendicular acting dies and pivoted handle, comprising:
- a first die housing;
- a second die support member;
- a neck joining said first die housing and second die support member in mutually separated position and defining a workpiece-receiving cavity therebetween;
- a first die carried by the first die housing for motion on an axis that is substantially perpendicular to the second die support member, wherein said first die housing defines a pivot pin bore of predetermined diameter and following an axis disposed in a plane substantially normal to said perpendicular axis of movement of the first die;
- a pivot pin received in said pivot pin bore, said pivot pin having a substantially smaller diameter than the pivot pin bore;
- a resilient means for radially supporting the pivot pin in the pivot pin bore and for allowing resiliently opposed radial motion of the pivot pin within the pivot pin bore;
- and
- a first handle lever pivotally attached to the first die housing at said pivot pin and moveably connected to said first die for moving the first die with respect to the first die housing in response to relative pivotal motion between the handle lever and first die housing.
5 more elements
Dependencies are inferred from the claim text.