US2301889A - Riveting hammer - Google Patents

Description

Nov. 10, 1942.

E. B. L EAR R'IVETING HAMMER Filed NOV, 2, 1939 INVENTOR EARL 5. 5.14,?

ATTORNEY Patented Nov. 10, 1942 OFFICE RIVETING HAMMER Earl B. Lear, Garfield Heights, Ohio, assignor to The Cleveland Pneumatic Tool Company, Cleveland, Ohio, a corporation oi' Ohio- Application November 2, 1939, Serial No. 302,547

(Cl. 7B-48) 2 Claims.

This invention relates broadly to riveting machines, but more particularly to an improved front end for portable riveting hammers of the iluid actuated percussive type.

One object of this invention is to produce a riveting hammer capable of driving `rivets disposed in angular relation with respect to the normal centeraxis of the riveting4 hammer, thereby rendering possible riveting operation in places heretofore inaccessible with the usual riveting hammers.

Another 'object of this invention is to produce an angle-riveting hammer forming a compact assembly which is strong, durable and efficient.

Other objects and advantages more or less ancillary to the foregoing reside in the specic con-` struction and aggroupment of the elements peculiar to this structure, as will become apparent from a more complete examination of this speciflcation.

In the drawing:

Fig. 1 is a side elevational view, partly in section, of a riveting hammer embodying the invention. l y

Fig. 2 is a view looking in the direction of the arrows 2-2 in Fig. 1. l

Fig. 3 is a cross sectional view taken in a plane indicated by line 3--3 in Fig. 1.

Referring to the drawing, III is the cylinder of a riveting hammer and II. the back head within which is housed the usual valve mechanism (not shown). I2 is a connection screwed in the free end of the head II, through which motive lluid, controlled by a throttle valve I3 operable by a handle I4, may be admitted into the piston chamber I5. In this chamber is reciprocably mounted a iluid actuated piston I6 capable of delivering a rapid succession of impacts to a plunger I1 slidable within a bushing I8, which plunger has its inner end extending into the front end of thev chamber I5, while its other end is terminated by a head I9 resting against the front end of thel bushing I8.

The front end oi the cylinder I Il is formed by two parallel lugs 20 and 2| extending laterally from one side of the cylinder I and between which is located the head I9 of the plunger I1. The lower foremost corners of the lugs and 2| are united by an integral bridge 22 having a bore 23 extending therethrough at substantially right angle from the center axis of the cylinder I0. In this bore is slidably mounted a rivet set 9 includlng a shank 24 slidable in the bore 23 and formed with a head 25 engageable with the work shown plates 21. To prevent accidental withdrawal of the rivet set from the bridge 22, the shank 24 near the free end thereof is provided with a spring clip 28 engageable with the bridge 22.

Mounted between the lugs 2U and 2I, there is a substantially L-shaped 'anvil block 29 pivotally connected to the lugs by a cross pin 30. The anvil block 29 is provided with two operating faces 2| and 32 disposed at rightangle from one another, the former being engaged by the head I9 of the plunger I8, and the latter resting on the free end of the rivet set 25. In thickness the anvil block 29 fits closely between the lugs 20 and 2I to prevent lateral movement of the block relative to the lugs. d

In operation, the reciprocations of the piston I6 resulting from the action of the motive fluid alternatively admitted into the extreme end portions of the piston chamber I5, will cause the piston I6 to deliver a rapid succession of impacts on the plunger Il, which impacts are in turn delivered to the anvil block 29 and therefrom to the rivet set 9 through the pivotal movement of the block 29 on the cross pin 30. In order to transmit the impacts from the plunger I'I to the rivet set 9 without loss of efilciency, the anvil block 29 is calculated to engage the head I9 of the plunger I1 while the plunger is at the extreme end of its inward movement relative to the cylinder I0, with the rivet set 9 at the extreme end of its inward movement relative to the bridge 22 While engaged by the operating face 32 of the anvil block 29.

From the foregoing explanation, it will be understood that through the anvil block 29 pivotg ally mounted within the front end of the cylinder in the drawing as a rivet 26 extending through 55 4 III, it is possible to transmit the impact of the plston I6 to the work or rivet 26 located in angular relation with respect to the center axis of the cylinder III.` While the drawing shows a construction wherein transmission of impacts takes place at substantially right angles, itis clear that through this novel arrangement of parts it would be possible to transmit impacts of the piston IB at any desired angle.

Although the foregoing description is necessarily of a detailed character, in order to completely set forth the invention, it is to be understood that the specific terminology is not intended to be restrictive or conilning and it is to be further understood that various rearrangements of parts and modifications of structural detail may be resorted to without departing from the scope or spirit of the invention as herein claimed.

I claim:

1. A riveting hammer comprising an elongated cylindrical housing, a power actuated impact delivering piston concentric in said housing, an

'impact receiving plunger concentric in said housing slidable therein relative to said piston, a pair of laterally spaced parallel walls forming one end of said housing, a rivet set slidable between said Walls transversally of said plunger, and an impact transmitting anvil block carried by said housing for pivotal movement between said Walls, said anvil block having anglarly disposed faces perpendicularly engaged by the adjacent ends of said plunger and rivet set.

EARL B. LEAR.

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