US1977851A - Stamper and hammer for foundries - Google Patents

Description

Oct. 23, 1934. ||l HEPPERLE 1,977,851

STAMPER AND HAMMER FOR FOUNDRIES Filed sept. 22, 1953 2 sheets-SmeL 1` INVENTOR Hei/1 156k v/feynp erle.

il Ar ATTORNEYS Get.

23, 1934. H. HEPPERLE STAMPER AND HAMMER FOR FOUNDRIES Filed Sept. 22, 1953 2 Sheets-Shea*u 2 WZL/Lm LLM/fm.

la ATTORNEY Patented Oct. 23, 1934 sTAMrER AND HAMMERI FOR FOUNDRIES" `Heinrich Hepperle, Mulheim-on-the-Ruhr-Speldorf, GermanyV Application september 22, 1933, serial No. 690,523 In Germany September 26, 1932 6 Claims.

This invention relates to foundry implements and more particularly to the tools used in tamping molding sand around patterns from whichhowever, the sharp edge of 3a shovel frequently mutilates the pattern and its tendency is destructive to the flasks and other Wooden equipment of the foundry. y y

It is therefore an object of thepresent inven-v lf tion to provide atamper or rammer composed of ductile rather than rigid unyielding material, which cannot damage theparts with which it is brought into forcible Contact, due to its elasticity..`

A still further object is to provide a hollow 20- yieldable impactor capable of lateral expansion under the application of force and Whichrmaybe actuated by machine or by hand inits` workapplication. A Y

A further feature is in the provision. of a found- '25 ry sand tamperhaving itsl opposite ends unlike in size, and also in shape if preferred, so that a single implement may be used with equal facility for different kinds of work selectively.

Another purpose is to produce a convenient type 30"* of tool having a non-slip grip portion, that is of such weight as is compatible with its purpose and in which the striking faces or impactors may be readily renewed as they become Worn, at a moderate cost, or other types of faces substituted.

These meritorious objects are accomplished by the novel construction and combination of parts hereinafter described and illustrated in the accompanying drawings, constituting a material component of this disclosure, and in which:

Figure l is a side elevational view of an embodiment of one form of the invention.

Figure 2 is a longitudinal sectional View of same, taken in a plane at a right angle to Figure 1.

Figure 3 is a view of the parts arranged in position for assemblage.

Figure 4 is a side View of one of the clamp members looking from its inner proximate side.

Figure 5 is an end elevational View of the same.

Figure 6 is a side elevational view showing the parts as arranged for operation in a pneumatic tamping machine for foundry use.

Figure 7 is a sectional View of an impactor head k as used in connection with a reciprocative tamp- 55. ing machine.

(Cl. .Z2-187) Figure 8 is a side elevational'` viewrof another forni of the device, partially in seotion.`

Figure 9 is a similarlview ofthe same, taken in a plane at a right angleto Figure 8;` y

Figure l0 is an end elevational viewrthereof..

Figure 1l is a sectional View taken` on line 11-11 of Figure 8.

Figure 12 isa fragmentary longitudinalsectional view taken 'on line l2-120i `Figure 8.V

Figure 131s a plan'f View of orie of` the clamp' elements. l j l Referring to Figures 1 to 5 in greater detail; the tamping implement shown will be-seen to? consist of two impactor heads 15-16, respectively lof ovoidal and circular`cross sectiongboth being composed of yieldable material, a's-semi-soft rubbei', and obviously may be of Aany'suitable shape," size and proportion for the work to be performed; these heads containing openings 154--16 to per` mitlateral expansion.

Formedintegrally on the `base portions offeach of the impactors are central, longitudinallyextending, wedge shaped, tenori-like ridges 17`-18.

These lridges are adapted tobe received between a pair of jaws 20-21, having undercut recesses 22 between them adapted to grasp and firmly engage the wedge-shaped extensions 17-18, which are further held from slipping endwise `by opposed pairs of inreaching end lugs 23 and central serrated lugs 24, as best seen in Figures 3, 4, and 5. y

Formed with these jaws are semi-cylindrical stems 25 adapted to be forced into a socket 26 in the end of a metal tube 27, preferably provided with a covering 28 affording a non-slip grip for an operators hand, a rubber tube being ordinarily employed; this handle element may, if desired, be weighted, as at 29 by filling the interior with lead or like heavy material.

It will be obvious that the length and diameter of the tubular connection between the clamps will be proportioned to suit varying conditions, while the length of the clamp jars will be suited to engage the impactor elements l7-`18, thus providing an efficient implement for tamping sand and like foundry purposes.

In Figure 6 is indicated conventionally a pneumatic operated machine for producing reciprocative movement in an impactor of the type shown in Figure 7, the impactor head 30 having an undercut extension 30 held between clamp jars 31 drawn together and connected with a body 32 by one or more bolts 33, the body having a tapered socket 34 in its open, upper end to be engaged by a rod 35, parts of the reciprocating apparatus iro , addition to Icentra-l lugs 49.

being generally indicated by the numeral 36.

It will be understood that the ductile impactor head will be shaped in accordance with requirements and is capable of acting as a rammer for the sand without being destructive to wooden or metal patterns or other devices used in foundry practice.

Figures 8 to 13, inclusive, show a mallet or maul having the same general characteristics as the foregoing and consisting of a pair of heads 40, here shown to be substantially circular, provided with flat level operative surfaces, opposed to which are tenon-like integral ridges 41, held between a pair of metal clamps 42.

These clamps are alike in all respects andprovided with interengaging tongues 43, on their proximate sides, adapted to engage with corresponding grooves 44, in the opposite portion of the sides, and having openings to receive bolts by which they may be drawn firmly together.

The jaw elements 46 are formed with inreaching lugs 47,` in which are set lspurs 48 suited to engage the anks of the impactor tenons41, preventing longitudinal movement Aof the heads, in

Formed equally between the clamp elements 48 is a central circular opening k50, preferably enlargedat itsy central portion,` constituting a barrel shaped-space and having spurs`51 to engage with the wooden handle 52 by which the implement is manipulated. 2

,On the opposite extremityof the handle 52 is a tenon 53 over which` may be forced an elastic impactor 54, similar in purpose to the head 16 of the implement shown inFigures 1 and 2.

To those familiar with the art offoundry work, it will be apparent that eicient tools for the impacting of Sand, kand loosening of patterns, boxes and the like, have been described, but however', as changes of construction could be made withinthe scopepof the invention, it is intended thatall matter contained in the foregoing description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Having thus described the invention, what is claimed as new, and desired to secure by Letters Patent is:

1. A foundry tamping implement comprising a rigid shank, opposed clamp jaws carried by said shank, and a hollow elastic impactor removably fixed between said jaws.

2. A foundry tamping implement comprising a rigid shank, a pair of opposed undercut clamp jaws engaged by said shank, and a pliable impactor containing an open passage and having a base kprovided with an elongated projection suited tol .be clamped between said jaws.

3. A-foundry tamping implement comprising a rigidshank, a Vpair of opposed undercut clamp 4jaws engaged by said shank, a hollow pliable impactor having a base provided with an elongated Yprojection suited to be clamped between said jaws, said impactor being laterally expansible upon the application of pressure on said shank.

4. A foundry tamping implement comprising a rigid shank, a pair of opposed undercut clamp jaws engaged by said shank, a hollow pliable impactor having a base provided with an elongated projection suited to be clamped between said jaws, and means in said jaws to prevent movement thereof relative to said impactor.

5. A `foundry implement including a bar-like shank handlecomposed of a tube having a weight inside and `a non-slip elastic cover, said tube having open sockets at its ends, pairs of undercut clamp `jaws having taper stems to tightly t said sockets, flexible heads having yielding tenons to engage between said jaws, and corrugations in the faces of said jaws to grip said tenons.

`6. A foundry implement comprising a rigid body having means for attachment to a machine for reciprocative movement, a socket in the opposite end of said body, clamp jaws arranged in mated pairs and having stems adapted to be forced into said sockets whereby the jaws are closed, the inner faces of said jaws being undercut, and soft, `non-metallic impactors having parts to be gripped between said jaws.

. HEINRICH HEPPERLE.

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