US2650735A - Spreader tool with grooved nose elements - Google Patents

Description

Sept. 1, 1953 R. L. REDMOND SPREADER TOOL WITH GROOVED NOSE ELEMENTS Filed June 16, 1950 INVENTOR. 0.52??? Z. AAo/n 04 0 i 1 MKW Patented Sept. '1, 1953 SPREADER TOOL wrrn onoovnn NOSE ELEMENTS- Robert L. Redmond, Detroit, Mich., assignor to Automotive Rubber Company, Incorporated, Detroit, Mich., a corporation of Michigan Application June 16, 1950, Serial No. 168,523

1 Claim. 1

This invention relates to a spreader tool and more particularly to a tool for installing insulated conduit collets.

In my co-pending application Serial No. 153,- 138, filed March 31, 1950, there is described a rubber coated collet having a particular type of formed projection for retaining it in a hole. This formed projection consists of tabs struck from the center of the forming blank and projecting from the margin of the inside hole.

These projections are curled around and extend, prior to installation, somewhat into the central aperture. After installation these projections are moved back over the margin of the retaining hole where they serve to hold the collet in position.

Many times these insulating collets are installed in vehicle bodies or airplane fuselage or wings in places where it is difficult for an installer to actually see the panel on which he is working. For this reason it is desirable to have an installing tool which can be used with a sense of feel, enabling an operator to work blind, that is, to manipulate the tool in places beyond his vision but within reach of his hands.

Briefly, the tool consists of two levers which are pivoted with one pair of ends spread apart to serve as handles and the other ends, more adjacent the pivot, being formed to provide an operating nose portion. This nose portion has grooves along each side to receive the projections that are to be formed and also has a restricted portion which permits the tool to spread and shape properly the projections into retaining position.

Drawings accompany the specification, and the various views thereof may be briefly described Figure 1, a side elevation of the tool shown in operating position.

Figure 2, a view of the tool shown in spread position.

Figure 3, an illustration of the collet in its relation to the retaining aperture.

Figure 4, a sectional view on line 4-4 of Figure 1.

Referring to the drawings, Figure 3 shows a plate P having an aperture in and shown in aligned relation with this aperture is a collet l2 fully described in the co-pending application above identified. The collet has projections H which consist of struck out tabs curled back toward the margins of the collet and coated with rubber as shown in Figure 1. Figure 4 illustrates how these curled projections H lie within the aperture In prior to installation.

Ill

The installing tool consists of two levers L having handles 20 on one side of a pivot pin 22 which associates the levers in pivoting relation. The handles 2|] are spread apart as shown in the drawing to permit movement toward the axis of the tool. At the other end of the tool is the operating nose which consists of two ends 24. The ends 24 lie back to back at 26, Figure 4, when in the insertion position. These ends taper slightly from the outer end, enlarging toward a shoulder 28 which projects transversely of the tool on either side and the combined widths of the shoulder being considerably greater than the combined width of the nose portion. This taper is in one transverse direction from the outer end.

The tapered sides 30 are grooved as shown best in the section of Figure 4 at 32, and both of the ends 24 are restricted at 34, the restriction ending at the shoulder 28'. A spring 40 tends to urge the operating sides of the tool to the position shown in Figure 1.

In the operation of the tool the nose portion is inserted into the grommet and turned until the two grooves 32 receive the projections 14. This relative position of the tool and the collet can be determined quite readily by a brief rotating movement as the nose enters the central aperture of the collet. When it is clear that the projections are in the grooves, the nose can be fully inserted into the collet and the shoulder 28 will push the collet against the plate P.

A squeezing pressure on the handles 20 will then cause a spreading action, as shown in Figure 2, of the nose ends 24 and the projections 14 will be forced into retaining positions as shown in Figure 2. At this time the restricted portions 34 permit this spread action since the projections [4 are still positioned to be contacted by the widest portion of the surface 30 while the restricted portions 34 will receive the margins of the collet itself.

After the spreading action, which leaves the projections M in their retaining position, the handles 20 may be released and a slight pull on the outwardly curved portions 44 will remove the tool from the opening.

What I claim is:

A non-cutting deforming tool for softcoated insulating grommets having coated retaining ears to be moved over the margins of a. retaining aperture, said tool being of the type having lever arms pivoted together such that movement of one pair of ends toward each other will spread the other ends open, wherein said other ends constitute nose elements symmetrical tially normal to the bisecting plane containing 1 the axis of the pivot when said fiat back per-"- tions abut, each of said tapered outer side faces of said nose elements being grooved lcn gi:

tudinally with a single groove slightlyv narrower than the width of the nose elexnents and disposed centrally thereof and extending from the distal end to the narrowed portion, wherein the respec tive bases of said grooves are divergent from the distal end of said nose elements when the lat- 5 ter are in closed position.

ROBERT L. REDMOND.

References Cited in the tile of this patent UNITED STATES PATENTS 10 Number Name Date 1,157,082 vCampbell Oct. 19, 1915 .1,726,582 Ottinger Sept. 3, 1929 2,324,468 Brickman July 20, 1943 H i v 5 FQREIGN PATENTS Number Country Date 360,713 I Great Britain Nov. 12, 1931

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