US2188846A - Ratchet device - Google Patents

Description

Jan. 30, 1940. T. o. Rui-:B

RATCHET DEVICEl Filed oct. 14, 1958 f fw 5 ,yal/41 Patented Jan. 30, 1940 ATENT @Fries RATCHET DEVICE Theodore 0. Rueb, Chicago, Ill., assignor to The Sherman-Klove Co., Chicago, Ill., a corpora- 'tion of Delaware Application October 14, 1938, Serial No. 235,003

Claims.

This invention relates to wrenches of the type in which the handle is operatively connected with a rotatablehead or driven member by means of ratchet and pawl mechanism constructed so that 0 the movement of the driven member may be reversed or rotated in either direction by the vibrating movement of the handle.

The objects of this invention are primarily to produce an improved wrench of this character which will be particularly sturdy and substantial in construction and simple and efficient in operation.

Other objects are to provide an improved reversing mechanism for changing the position and u ratcheting action of the p-awl, and such other advantages as will appear more fully from the following description.

In the accompanying drawing illustrating this invention,

Figure 1 is a plan view of the wrench showing the handle broken away;

Figure 2 is a sectional View taken on the line 2-2 of Figure 1;

Figure 3 is a sectional View taken on the line C .25 3--3 of Figure 2;

Figure 4 is a view similar to Figure 3 but showing the pawl in reverse position;

Figure 5 is a sectional view taken on the line 5 5 of Figure 2; and Figure 6 is a view showing parts of the reversing device in disassembled position.

The wrench 1 has a barrel or cylindrical head 8 provided with a handle which may be formed integrally therewith or secured thereto in any desired manner. The barrel 8 is closed at one end by a head 9 preferably formed integrally therewith. It is also provided in the central portion With ratchet teeth I0 which are adapted to be operatively engaged by teeth II and I2 in the opposite ends of a reversible pawl I3.

pawl I3 is mounted in a recess I4 in the longitudinally central portionvof a work-engaging head or driven member I5 which is rotatably mounted in the barrel or driving member 8 as shown particularly in Figure 2. 'The driven member. may be held in rotatable position by any suitable means as by means of a spring ring I6 which coacts with these parts to hold them together. The driven ymember I5 may be connected'with the nut or article to be turned in any suitable manner, having a projection I'I of the type commonly used for engagement with sockets or the like as indicated at I8.

The pawl I3 is pivotally mounted on a pin I9 u secured in the driven member I5 so that either end thereof may be moved into ratcheting engagement with the teeth of the driving member. The pawl isreversed and either end also held in ratcheting position by means of a pin or plunger 2li having its projecting end rounded to engage withv a curved surface 2| on the adjacent portion of the pawl as shown in Figures 3 and 4. The plunger 20 is carried in a socket 22 which is closed at one end, and is urged outwardly by a compression spring 23 which holds it in 10 operative position. The socket 22 engages with a transverse hole 24 in a short shaft 25 which vis rotatably mounted in a bearing 25 in the centen of the driven member, being co-axial therewith. The socket 22 has an outwardly ex- L) tending flange 21 at one end for engagement with the flattened side of the shaft as shown. Ther shaft 25 has a transverse blade or key 28 that fits in a slot or keyway 29 in a disc 30. The y shaft alsohas a round central trunnion 3I that 1'" lits in a bearing 32 in said disc. kThe disc 3D has a peripheral shoulder 33 so that the upper portion thereof is of smaller diameter than the lower portion.

The lower portion of the disc fits in an an- 25 nular recess 34 in the driven member I5 and the smaller portion of the disc fits in the hole or bearing 35 in the cap or head Aportion 9. The arrangement of these inter-fitting parts is such that they are all held in alignment to in- 3H sure proper operation. The disc 38 is provided on its upper surface with a `transverse projection or iingerpiece 36 for turning the same.

It will `be noted that the socket 22 projects a substantial distance through the shaft 25 as 135 shown in Figs. 3 and 4 and stop members such as pins 3l and 38 are provided in the driven member I5 to limit the swinging movement of the shaft 25 when it is turned to reverse the pawl.

The operation of the wrench will be readily 4u apparent to those familiar with these tools. When the driven member is to be turned in one direction the user rotates the shaft 25 by means "of the finger-piece 36 to swing the plunger 20 past dead-center for instance as shown in Fig- 45 ure 3. When itis desired to rotate the driven member in the opposite direction the shaft 25 is rotated past dead-center or the position shown in Figure 4, the stop pins 3l and 36 serving to limit the movement in the respective directions. When 5U the plunger is in either of these operating positions the spring 23 tends to urge it toward the pawl and consequently keep the corresponding end of the pawl in resilient or ratcheting engagement with the teeth of the driving member.

The various parts of the wrench may be made of any suitable material for the purposes intended and changes may be made in the details of construction or particular arrangement of the parts to adapt the wrench for different uses Without departing from the scope of the invention.

What I claim is:

1, A ratchet device comprising a driving member,` .a driven member rotatably mounted in the driving member, a double ended paw] pivotally mounted in the driven member adjacent tolo'ne side thereof and having teeth inthe opposite ends, an annular series of teeth in the driving member for engagement with the respective ends of the pawl, a shaft rotatably mounted, in the driven member and co-aXial therewith, a transverse socket mounted in the shaft, a plunger in said socket, a spring coacting with the socket and plunger and serving to press the `plunger' against an adjacent curved surface in the pawl for swinging the pawl, means for manually rotating the shaft, and means for limiting the rotative movement thereof whereby the plunger will coact with one or the other end cf the pawl when swung to operative position.

2. In a ratchet device, the combination of a driving member including a barrel having teeth projecting inwardly therein, a driven member rotatably mounted in the barrel, means for holding said driven member in the barrel, a pawl mounted in a transverse recess in the driven member, a pin in the driven member adjacent to one side thereof on which the pawl is mounted, said pawl having a curve-d surface opposite to the axis of 'the driven member, a shaft mounted in the driven member co-axially therewith, a transverse support in the shaft, a spring plunger in saidy support which engages with the said curved surface to swing the pawl and hold it in ratcheting positions, a transverse key at one end of said shaft, a center trunnion projecting from the key, a disc rotatably mounted in the driven member and having a transverse slot for receiving said key and a center bearing for receiving said trunnion, said disc also having a portion engaging with a bearing in the end of the barrel, and a finger-piece projecting from said disc for actuating the same. v

3. A device as per claim 2 in which the plunger through a transverse hole in said shaft and having a flange engaging with said flattened surface.

4. A ratchet device comprising a barrel adapted to be actuated by a handle or the like and shaft is attened at one side, the socket projecting having a head at oneend With a center hole therein and having a peripheral series of ratchet teeth projecting inwardly, a disc rotatably ymounted in the hole in the head, a finger-piece projecting from said disc for rotating the same,

' a driven member for turning a part to be acted upon, rotatably mounted in the barrel and having a recess forming a bearing for said disc, a

`short shaft rotatably mounted in the driven member, a projection on said shaft engaging with a transverse slot in the disc, a spring plunger mounted laterally in the shaft, means in theY driven member for limiting the rotating movement of said shaft, a double-ended pawl pivotally mounted in 'a transverse opening in the driven member and adapted to have its ends engage the barrel and driven member for holding the ,y

driven member and parts associated therewithin operating position inthe barrel.

r5. In a ratchet device, the combination of a f barrel having inwardly projecting teeth therein, a driven member rotatably mounted in the barrel, a pawl pivotally mounted in the driven member and having oppositely disposed engaging por` tions for engagement with the teethr whereby the driven member may be turned in` opposite direc# tions, an operating disc positioned within the barrel and having a bearing in thel driven member and also having a vbearing in the end of the barrel, and means coasting with the disc and the pawl for moving the pawl" to its respective operating positions and holdingthe. same with the corresponding end in resilient engagement with said teeth.

- a TI-IEODORE O. RUEB'.

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