US 3738768 A
A drive tap wrench that is manually operable and which includes a removable cross-handle; the device being adaptable to be used as a conventional "T" tap wrench or which can be used with a 1/4 inch drive ratchet wrench.
Description (OCR text may contain errors)
United States Patent [1 1 Kuhn 1 1 TAP WRENCH WITH SWIVEL DRIVE  Inventor: Russell P. Kuhn, 109 Tesing Circle,
Bridgeport, Conn. 06606  Filed: Feb. 9, 1971  Appl. No.: 113,900
 U.S. Cl...... 408/240, 279/42, 145/61 2,
9 81/177 E,8l/177 ST  Int. Cl B251 13/10, 1325b 13/44  Field of Search 408/238, 239, 240;
81/177 E, 177 G, 177 D, 177 ST, 177 U], 177.8, 177.9; 279/42; 145/65, 61 L  I References Cited UNITED STATES PATENTS 1,301,802 4/1919 Anderson 145/61 L in] 3,738,768 l'June 12, 1973 1,371,350 Campbell 81/177 E 1,506,331 8/1924 Benko 1,498,712 6/1924 York 192,423 6/1877 Elterich 408/240 FOREIGN PATENTS OR APPLICATIONS 257,869 3/1928 Italy ill/177.5 F
Primary Examiner-Francis S. Husar  ABSTRACT A drive tap wrench that is manually operable and which includes a removable cross-handle; the device being adaptable to be used as a conventional T tap wrench or which can be used with 3. /1 inch drive ratchet wrench.
1 Claim, 4 Drawing Figures PAIENIED JUN I 21915 //V MFA/roe @055544 P Kay/v TAP WRENCH WITH SWIVEL DRIVE This invention relates generally to wrenches. More specifically it relates to tap wrenches.
A principle object of the present invention is to pro vide a drive tap wrench that is manually operative, and which includes a removable cross-handle.
Another object is to provide a drive tap wrench which is adaptable to be used as a conventional T tap wrench.
Yet another object is to provide a drive tap wrench which can be used as a drive ratchet wrench of A, or k inch size.
Yet another object is to provide a drive tap wrench which can reach into confined areas that are not accessible to conventional wrenches.
Other objects are to provide a drive tap wrench which is simple in design, inexpensive to manufacture, rugged in construction, easy to use.and efficient in operation.
These and other objects will be readily evident upon a study of the following specification and the accompanying drawing wherein:
FIG. I is a perspective view of the invention.
FIG. 2 is a side view thereof shown partly in cross section.
FIG. 3' is a modified design of the invention wherein the tool is pivotable about a center thereof so that when pivoted to 90 the pivoted end forms a lever.
FIG. 4 is another modified design wherein the lever bar is in sections so to pivot out'of the way and clear any side obstructions.
Referring now to the drawing in detail, and more particularly at this time to FIGS. 1 and 2, the reference numeral represents a drive tap wrench according to the present invention wherein there is an elongated shank 11 which at one end 12 forms a component of a chuck 13 to hold a tap; the end being hollowed out to receive the tap end. The end 12 is transversely split with a slot 14 so that the tapered terminal 15 of the end 12 forms jaws 16. The outer side of the shank 11 is threaded as shown at 17 upon which a knurled nut 18 is engaged; the nut serving to compress the jaws l6 and bind against the tap for holding the same.
The opposite end of the shank includes an enlarged head 19 with a square socket opening 20 for removable securement with a socket wrench extension, not shown. A transverse extending removable handle 21 extends through a hole 22 in the head 19 to provide leverage to rotate the tool in a tapping operation.
Inoperative use, it is now evident that the tool is adaptable to be used as a conventional T tap or as a drive ratchet wrench of A, or 1% inch size.
In FIG. 3, a modified form of the invention is shown wherein the drivetap wrench 23 has an upper end thereof pivotable about a transverse pivot pin 24 so that the upper end when tilted 90 forms a leverage arm for rotating the tool during a tapping operation. In this form of the invention, the shank is divided into two components 25 and 26 which are attached pivotally free respective to each other by the pin 24.
In FIG. 4 another modified drive tap wrench 27 has a cross-handle 28 that is segmented into three parts 29, 30 and 31 which are enjoined by transverse pins 32 so that the handle may be retained selectively straight or angled as shown.
It is now evident that the forms of the invention illustrated in FIGS. 3 and 4 are adaptable for operating in close quarters wherein there is insufficient space for fully swinging a one piece cross arm.
While various changes may be made in the detail construction, it is to be understood that such changes will be within the spirit and scope of the present invention.
1. ma drive tap wrench, the combination of a shank having a chuck at one end adapted to receive a tap and an opposite end having means for shank rotation wherein said chuck comprises a pair of similar symmetrical oppositely disposed spaced jaws, adapted to receive a tap therebetween, said jaws having an exteriorly threaded surface with an interiorly threaded sleeve mounted thereon, said jaws including tapered end portions extending integrally from an intermediate portion of diameter equal to the shank diameter, said spaced jaws being formed by a slot extending longitudinally along the shank axis coextensions with and through the intermediate'and end portions of the jaws terminating adjacent the termination of the threaded surface, said sleeve including an upper cylindrical segment threaded on the intermediate portion and of similar length including a lower tapered segment in surrounding abuttment with the tapered portions of said jaws, wherein said means for rotating said shank comprise an enlarged head with a terminal square socket for receiving a socket wrench extension, said head being pivotally secured to said shank by means of spaced bifurcations mounted on a tongue extending integrally from the shank, said bifurcations and tongue being axially coextensive, including a pivot pin mounted transversally through said tongue and bifurcations, wherein said bifurcations have outer cylindrical surfaces forming an aligned extension of the shank exterior.