Angle gluing clamp

Details Angle gluing clamp Angle gluing clamp

2000-10-30

2001-11-20

Watson, Robert C. (Department: 3723)

Work holders

Plural holders to hold workpieces relative to each other

Workpieces normal to each other

Reexamination Certificate

active

06318712

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates to clamping of two pieces or segments in an adjoining relationship, and more particularly to a clamp for maintaining a butting relationship between the two segments so that the segments can be glued or otherwise joined to one another.
When joining two flat segments, such as pieces of plastic, to one another, it is necessary to maintain those pieces in that relationship temporarily so that they can be glued or otherwise joined at their junction. Typically the pieces are joined at a 90 degree angle to one another, although obviously, no matter what the angle of juncture, it is important that the pieces be held stably until the gluing process has been completed.
Various devices have been developed in the past for such juncture. For example, U.S. Pat. No. 112,801 discloses an angle vice for joining two parts together. Similarly, U.S. Pat. No. 4,033,570 discloses a simple corner clamp for securing parts together. Similarly, a more complex comer clamp is disclosed in U.S. Pat. No. 4,984,775.
While the prior art provides devices that have utility, those devices tend not to have universal utility for use in all clamping situations. They also, because of their constructions, tend to make application of glue to join pieces very difficult unless the glue is applied before the pieces are joined. That may be unfeasible in many situations.
SUMMARY OF THE INVENTION
The invention provides a clamp for maintaining two butting segments in an adjoining relationship to one another. It includes an inner clamp member and first and second outer clamp members, with each outer clamp member being adjustably secured to the inner clamp member. An operating element for each outer clamp member is provided for moveably positioning the outer clamp member in relation to the inner clamp member. A spacing element for each outer clamp member is provided for adjustably maintaining a gap between the outer clamp member and the inner clamp member, with the spacing element being offset from the operating element.
In accordance with the preferred form of the invention, each operating element comprises a bolt which extends from the inner clamp member through an aperture in the outer clamp member. An adjustable fastener is mounted on the bolt proximate the outer clamp member. In the preferred form of the invention, the adjustable fastener comprises a nut, which preferably is knurled.
Each spacing element comprises a bolt extending from the inner clamp member through the outer clamp member, and a spacer engaged by the bolt. In accordance with the preferred form of the invention, the spacer comprises a first nut on the bolt which is located between the inner clamp member and the outer clamp member and a second nut on the bolt which is secured to the outer clamp member. In the illustrated embodiment, the outer clamp member includes a cavity, and the second nut is located in the cavity.
An access aperture is provided in the inner clamp member spaced from the operating element to allow access to the juncture between joined segments. In the preferred form of the invention, the inner clamp member is angled longitudinally through the access aperture, and a chamfer is located adjacent the access aperture.
The clamp members can adjoin one another directly. Preferably, however, a clamp pad is located between each outer clamp member and the inner clamp member for protecting the segments being joined to one another.
In accordance with the disclosed form of the invention, the inner clamp member is formed at a 90 degree angle, with first and second clamp portions joined at that angle. The inner clamp member can be formed at other angles, and the juncture between the first and second clamp portions can be formed to be adjustable.


REFERENCES:
patent: 112801 (1871-03-01), Good
patent: 4033570 (1977-07-01), Curlow
patent: 4165869 (1979-08-01), Williams
patent: 4984775 (1991-01-01), Kahlke
patent: 5494553 (1996-02-01), Colucci

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