US 5,713,118 AGranted

Apparatus for positioning an element on a surface

AssigneeChick Machine Tool, Inc.

InventorsGeorge R. Swann, Eric R. Moore

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Abstract

Apparatus for attaching a member onto a planar surface of an object within a predetermined degree of positioning accuracy relative to a reference axis on the planar surface. The apparatus comprises first and second bores in the object that are spaced a predetermined distance apart on the reference axis such that their respective centers extend substantially perpendicularly through the reference axis. First and second hollow protrusions are formed on a mating surface of the member and are spaced apart on the mating surface a second predetermined distance and are shaped such that the second predetermined distance can vary a predetermined amount relative to the first predetermined distance without affecting the ability to simultaneously insert the first and second protrusions into the first and second bores, respectively, while maintaining the degree of positioning accuracy of the member relative to the reference axis on the planar surface on the object.

Claims10

Dependent claims

A locting system, comprising:

an object having a planar surface with a reference axis thereon, said object having a first receiving bore in said planar surface, first receiving bore having a first central axis at a known location extending substantially perpendicularly through said reference axis, said object having a secend receiving bore in the planar surface thereof, said second receiving bore having a ssecond central axis spaced from said first central axis at a first predetermined distance on said reference axis and extending substantially perpendicularly through said reference axis;
known location extending substantially perpendicularly through said reference axis;
a member adapted to be attached to said object within a predetermined degree of positioning accurace relative to said reference axis and having a first locating protrusion intergrally formed in a mating surface of the member and extending therefrom, said first locating protrusion having a substantially round cros-sectional shape sized for insertion into said first receiving bore, said first locating protrusion further having a first axial center and a first axial bore extending therethrough, said member having a second locating protrusion integrally formed in said mating surface thereof and having a second axial center that is spaced a second predetermined distance from said first axial center of said first locating protrusion such that when said first locating protrusion is inserted into said first receiving bore, said second locating protrusion is received in said second receiving bore, said second locating protrusion further having a second axial bore extending therethrough and a non-circular cross-sectional shape configured such that it is received in said second receiving bore although the difference between said first and second distances differs from said predetermined degree of accuracy to achieve said predetermined degree of positioning accuracy of the object relative to the reference axis on the planar surface;
and
fastening members inserted in said first and second axial bores to fasten said member to said object when first and second locating protrusions are simultaneously received in said first and second receiving bores, respectively.

2 more elements

A locating system, comprixing:

a vise-like workholder haveing a base, said base having a transverse reference axis thereon;
a jaw member attachable to the base of a vise-like workholder within a predetermined degree of accuracy relative to said transverse reference axis on said base;
a first receiving bore in a known location in said workholder base, said first receiving bore having a first central axis extending substantially perpendicularly through said transverse reference axis, said first receiving bore having a first threaded portion;
a second receiving bore in said workholder base, said second receiving bore having a second central axis spaced from said first central axis of said first receiving bore on said transverse reference axis a first predetermined distance and extending substantially perpendicularly through said transverse reference axis, said second receiving bore having a second threaded portion;
a first locating protrusion integrally formed in a mating surface of said jaw member and extending therefrom, said first locating protrusion having a four spaced-apart arcuate contact surfaces and being sized for insertion into said first receiving bore, said first locating protrusion further having a first axial bore extending therethrough;
a second locating protrusion formed in the mating surface of the jaw member and having a second axial center that is spaced a second predetermined distance from said first axial center of said first locating protrusion on said reference axis such that when said first locating protrusion is inserted into said first receiving bores, said second locating protrusion is received in said second receiving bore, said second locating protrusion further having a second axial bore extending therethrough and a non-circular cross-sectional shape configured for insertion into said second receiving bore althouth the difference between said first and second distances differ from said predetermined ddegree of accuracy and said predetermined degree of positioning accuracy of said jaw member with respect to said reference axis on saidk base member is achieved;
a first fastener having a primary threaded portion sized to extend through said first axial bore and selectively threadedly engage said first threaded portion of said first receiving bore;
and
a second fastener having a secondary threaded portion sized to extend through said second axial bore and selectively threadedly engage said second threaded portion of said second receiving bore.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/690,031Filed 31 Jul 1996 · continuation
Priority: 1 Oct 1992
Granted: 3 Feb 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

B25B 1/103
Using screws: with one screw perpendicular to the jaw faces, e.g. a differential or telescopic screw
B23Q 3/103
Auxiliary devices, e.g. bolsters, extension members: constructional elements used for constructing work holders
B23Q 3/183
For positioning only: centering devices
B25B 1/2405
Details, e.g. jaws of special shape, slideways: construction of the jaws