Metal fusion bonding – Metallic heat applicator – Tip or head alloy or polymetallic structure
Patent
1992-03-30
1993-09-28
Rosenbaum, Mark
Metal fusion bonding
Metallic heat applicator
Tip or head alloy or polymetallic structure
228 55, 219229, 219238, 403349, B23K 302
Patent
active
052480763
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a soldering tool comprising a handle and a rod-like or tubular heating element which is secured to the front end of the handle and onto the free end of which a soldering tip can be fitted which is provided with a bore for receiving the free end of the heating element and which can be locked to the handle or the heating element with the aid of a fastening sleeve which comprises at its end facing the handle a union nut for securing to a threaded extension of the handle. According to the invention, the sleeve is attached to the handle via the union nut and provides rigidity between the soldering tip and the sleeve.
Such a soldering tool is described inter alia for example in DE-U-85 08 482. In such a soldering tool the soldering tip is pushed through the interior of the fastening sleeve or said fastening sleeve is pushed onto the soldering tip fitted onto the rod-like or tubular heating element, the front end of the fastening sleeve engaging over the soldering tip and cooperating with a fastening bead on the soldering tip to firmly clamp the latter against the tubular or rod-like heating element. The fastening sleeve itself is secured with a sort of union nut or the like to a threaded extension at the front end of the handle or the rear end of the heating element. To permit the use of bent soldering tips as well, the fastening sleeve is provided with an elongated cutout at the outer periphery through which the end of the soldering tip serving for the soldering and the body of the soldering tip can be inserted, whereupon the soldering tip can be pivoted into the final position in the interior of the union sleeve. The soldering tip and the fastening sleeve can then be pushed onto the heating element and clamped. This type of configuration of the fastening sleeve permits however only the fastening of soldering tips having a maximum outer diameter which is smaller than the inner diameter of the fastening sleeve. Furthermore, the handling of such fastening sleeves on inserting the soldering tips is complicated in many cases, in particular when both the soldering tip and the fastening sleeve are hot.
DE-A1-24 12 060 further discloses a soldering tool, the handle of which carries at its front end a socket into which a soldering tip provided with its own heating element can be inserted, said soldering tip together with the heating element being secured in the sleeve by a bayonet fastener and mechanically locked via a resilient contact and being able to brought into electric connection with a current supply. No separate fastening sleeve is provided here.
The invention is based on the problem of providing a soldering tool of the type mentioned at the beginning in which in spite of using a fastening sleeve, soldering tips of any desired shape and outer dimensions can be employed and can be rigidly attached to the sleeve.
This problem is solved by the features set forth in the characterizing clause of claim 1.
Advantageous embodiments and further developments of the invention will be apparent from the subsidiary claims.
With the configuration of the fastening sleeve and the soldering tip according to the invention it is no longer necessary to push the soldering tip through the fastening sleeve; instead, the fastening sleeve and the soldering tip are connected together and locked with the aid of the rotary engagement means formed at the facing ends of the fastening sleeve and the soldering tip, said locking being achieved on turning the fastening sleeve with respect to the soldering tip.
The rotary engagement means can be formed in the manner of a bayonet fastener and include detent projections and detent grooves on the parts to be secured to each other.
The soldering tip can both be inserted into the free end of the fastening sleeve and engage over the latter, the engagement means of the fastening sleeve being arranged accordingly at the inner periphery or the outer periphery thereof.
In each case the detent groove comprises an axially extending section and a peripherally extending section which
REFERENCES:
patent: 450093 (1891-04-01), Beutelspacher
patent: 1561134 (1925-11-01), Woolman
patent: 2512426 (1950-06-01), Hartley
patent: 3423781 (1969-01-01), Henson
patent: 3963361 (1976-06-01), Schenk
Eisele Ernst
Eisele Fritz
Cooper Industries Inc.
Knapp Jeffrey T.
Patterson William B.
Rosenbaum Mark
Scott Eddie E.
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