US1480304A - Rammer - Google Patents

Description

Jan. 8 1924. v 1,480,304

A. SALIGER RAMMER Filed July 5. 1921 Patented Jan. 8, 1924.

n 'UNITED STATES NPa'rlezN'l" OFFICE.

mon semana, or s'r. Louis, mssouar.

man. i

Application ma my s, 1921. semi n. eaaoa.

To all 'whom it concern.'

Be it known t at I, ANTON Samoan, a citizen of the United States, and a resident ofl the city of St. Louis and State of Missouri, have invented a new and useful Improvement in Remmers, of which the following is a specification.

This invention relates rincipally to fluid operated rammers of the d used by metal founders for ramming, compressi or packt ing molding sand about the mol ing pattern, whereby the sand is made to conform accurately to the surfaces of the pattern, and it relates particularly to the rammerhead or butt for said rammers.

One of the principal objects of the present invention is to provlde the rammerbutt with an elastic pad for the protection of the butt and pattern during the packing of the sand. Another object is to removably secure the sad to the butt, whereby the pad is adapte to be replaced when it becomes Worn or damaged. Another 0bject is to eliminate the need for seiarate fastening members, such as screws an bolts, for securing the pad to the butt, which fasteners are liable to become loosened during the ramming operation and dama e the pattern. Other obJects are to simpli y the construction and to reduce the cost of manufacture.

The invention consists princi ally in a. rammen-head or butt adapted to e attached to the piston of a rammer and a tip or pad of india-rubber or other suitable elastic substance adapted to be detachably secured to said butt; and it also consists in the combinations and arran ments of parts hereinafter described an claimed.

In the accompanyin drawing, which forms part of this speci cation, and wherein like symbols. refer to like parts wherever the occur,

liyig. 1 is a side elevation of the forward end of a portable sand-remmer provided with a butt embodying my invention;

Fig. 2 is a central longitudinal section through said butt, the forward end portion of the piston being shown in elevation;

Fig. 3 is a central longitudinal section through the metallic body portion of said butt; and

Fig. 4 is a perspective view of the impactiece therefor.

Re erring to the accompanying drawin my invention is shown in connection wit an ordinary portable Huid-operated sandrammer comprising a cylinder 5 and a pisixm 6 working therein The piston 6 is reciprocated lo 'tudinally of the cylinder 5 bymeans of uid pressure which is controlled b the usual valves (not shown) at the hand e-end of thel rammer. The piston extends through suitable ackin (not shown) at the outer end of t e c lmder 5, which packing ,is held therein of a8 packing-nut 7 provided with' a locknut The piston projects forwardly beyond the packing-nut 7 and has a tapered end portion 9 ada ted to receive a metallic rammerhead or utt comprisino' a metallic body portion 10 and a detachable impact-piece giaferably in the form of an elastic pad 11.

e rammer-head 10 is preferabl made of aluminum and comprises a cylin rical base portion and a substantially conical upper portion.

y meansV The rammey-head has a cylindrical steel sleeve or bushing 12 cast therein concentric with the longitudinal axis thereof. The upper end of the bushing 12 terminates flush with the top surface of the rammer-head. The lower end of the bushing is closed by the metal of the rammer-head. The bore 13 of the bushing 12 is tapered to fit the tapered end portlon 9 of the piston 6; and said bushing is rovided midway between its ends with a circular flange or collar 14, which prevents endwise movement of said bushing with respect to said remmer-head.

The base of the rammer-head is provided with an undercut circular cavity or recess 15, adapted to receive a similarly undercut circular head portion 16, formed on the upper end of the elastic pad 11, the recess 15 and the head 16 bein substantially of a corresponding size an shape. This arrangement constitutes in eect a dove-tail joint between the rammer-head and the impact pad and firmly secures the pad to the rammer-head without the use of separate fasteners. The pad 11 is attached to the rammer-head 10 by forcing the undercut head portion 16 of saidl pad into the undercut recess 15 of said rammer-head, the elasticit of the pad permittin the undercut hea portion to contract sucientlv to ermit the larger diameter of the head to c ear the smaller diameter of the undercut recess. The impact pad protects the rammer-head and pattern and can be readily attached to said head and detached therefrom. The elasticity of said pad causes the remmer to strike a yielding blow, thus causing the sand to conform more accurately to the pattern. The elastic pad is preferably made of india-rubber or other lsuitable elastic substance.

It is noted that the use of the hardened steel bushing 12 prevents enlargement of the iston receiving hole 13 of the remmerhead) and permits the body of the remmerhead to be made of aluminum or other soft lightweight metal.

Obviously the construction hereinbefore described admits of considerable modification without departing from my invention. For instance, thebase of the remmer-head may be provided with an undercut channel, and a non-elastic pad may be provided with a similarly shaped undercut rib adapted to it in said channel, the dovetail joint thus formed preventing the separation of the pad from the remmer-head except by force applied in the direction of the length of said channel and said rib.

What I claim is:

l. A remmer-head comprising a body member and an impact iece therefor, said body member and said 1m act piece being formed with mating un ercut portions, whereby they are detachably secured together.

2. A remmer-head comprising a body member and an elastic pad therefor, said body member and said elastic pad being formed with mating undercut portionsgL whereby they are detachably secured together.

3. A rammer-head comprising a body member having an undercut recess in the base thereof, and an elastic pad having an undercut head portion adapted to lit the undercut recess in said body member.

4; A remmer-head comprising a body member having an undercut circular recess in the basethereof, and an elastic pad undercut recess, whereby said. pad is de-` tachably secured to said ramnier-head.

6. A rammer head comprising a body ortion having an undercut circular recess ormed in the base thereof, and an ielastic an undercut circular head pori pad having tion of a size and shape correspondin substantially to the size and shape of said re-r cess, the ad portion of said elastic pad being adapted to be forced into said recess in said rammer-head, whereby said pad is detachably secured to said rammer-head.

7. A rammer head comprisin a body portion having a hardened stee bushing therein said bushing having a tapered bore adapted ton of a rammel'.

8. A rammer-head comprising a body member having a bore which is tapered to fit the tapered end of a piston of a remmer, said body member having an undercut circular recess formed in its base portion, and an elastic pad havin an undercut circular head portion adapte to be forced into saidv undercut recesses, whereby said pad is detachably secured to said remmer-head.

9. A resilient tamping butt for rammers, comprising a shank having a mortise in its lower side, and a rubber butt having a tenen on its upper side adapted to engage the mortise of the shank, and means for frictionally connecting the shank to the end of the rammel' rod.

Signed at St. Louis, Missouri, this 1st day of July, 192i.

ANTON SALGER.

to receive the tapered end of a pis-l

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