US2490211A - Screw gripping screw driver - Google Patents

Description

Dec. 6, 1949 E. T. DAUSCH 2,490,211

SCREW GRIP'PING SCREW DRIVER I Filed Jan. 5, 1945 Juan/Wm Zowar T D Patented Dec. 6, 1949 Y r,

UNITED STATES PATENT OFFICE 2,490,211 SCREW GRIPPING SCREW DRIVER Edward T. Daus'ch, Sparks, Nev.

Application January 5, 1945, Serial No. 571,425

2 Claims.

The present invention relates to new and useful improvements in screw drivers, and more parf the screw driver.

A further object is to provide a tool of this character of simple and practical construction, which is eiiicient and reliable in operation, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the de tails of construction and operation, as more fully 'hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which Figure l is a top plan View.

Figure 2 is a longitudinal sectional view taken substantially on a line 2-2 of Figure 1.

Figure 3 is an enlarged fragmentary side elevational view of the screw holder at the end of the screw driver.

Figures 4, 5 and 6 are transverse sectional views taken respectively on the lines l l, 55 and 6-i5 of Figure 2.

Referring to the drawings in detail, wherein for the purpose of illustration I have disclosed a preferred embodiment of the invention, the numeral 5 designates the shank of the screw driver having the flat screw-engaging blade 6 at its outer end and having a handle I suitably secured at its inner end.

A pair of rods 8 are positioned longitudinally at opposite sides of the shank 5, the inner ends of the rods being slidably received and extending longitudinally through the handle I and inserted through a disc 9 reciprocably mounted in a chamber IE1 formed in a cap I I threaded on the outer end of the handle 1, the outer end of the cap being spaced from the adjacent end of the handle to form the chamber II], as will be apparent from an inspection of Figure 2 of the drawings. push-button I3 is slidably mounted in a central aperture in the top of the cap I i this button having a lower reduced section I4. The rods 8 have their upper ends bend inwardly at right angles to their main bodies, and these ends are gripped intermediate the slidable disc 9 and a washer [2 which abuts the shoulder intermediate the re- 2 duced lower end I4 and the main body I3 of the push-button. A diametrically disposed pin I5 is also positioned at the shoulder intermediate the lower reduced end I4 and the main body I3 of the push-button, where it is abutted by the washer I2, and this pin is adapted to abut the top of the cap II to limit upward movement of the push-button I3. 7 V

The disc .9, push button I3 and rods 8 are yieldably held in an upwardly or outwardly disposed position by means of. a coil spring l6 mounted between the outer end of the handle I and the disc 9.

The lower or inner ends of the rods 8 are slidably mounted in a washer or annular member I! welded or otherwise suitably secured adjacent the.

lower end of the shank 5.

A pair of spring fingers I8 have one end secured to the lower ends of the rods 8 by means of pins or rivets I9 and project longitudinallyat opposite sides of the blade 6 and with their lower ends bent inwardly to form jaws Z0 and provided at their inwardly projected end portions with V- shaped notches 2| adapted for receiving the shank of a screw or similar fastening device 22, whereby to grip the screw under the head thereof, as indicated in Figure 2 of the drawings.

The lower end of the shank 5 of the screw driver is formed at diametrically opposite sides with rounded knobs or lugs 23 engaging the inner surfaces of the fingers I8 whereby to separate or expand the jaws 20 upon a downward movement of the rods 8 and the fingers I8, the jaws 2B and sprin fingers l8 returning to their normal positions upon an upward movement of the rods 8.

Accordingly, by depressing the plunger I3, the rods 8 and fingers I8 will be moved downwardly relative to the screw driver to separate the jaws 20 in order to receive the screw 22 between the jaws and upon releasing the plunger I3, the spring IE will move the rods 8 and fingers I8 upwardly to cause a gripping engagement of the screw with the jaws 20.

While I have illustrated the invention adapted for use in holding screws or similar fastening devices, it will be apparent that the device may {also be used for gripping and applying nuts onto olts.

It is believed the details of construction and manner of use of the device will be readily understood from the foregoing without further detailed explanation.

Having thus described the invention, what I claim is:

In a screw driver and a screw-holding at- 3 tachment therefor, the screw driver having a handle and a screw-engaging shank projecting from one end of the handle, and the attachment comprising a pair of rods disposed on opposite sides of and extending longitudinally of the shank, said rods being slidable in said handle and having one end projecting beyond one end of said handle, the other end of said rods projecting beyon the. M 3 and o! the hand e a guid pl on said shank having holes through which the rods extend slidably, a hollow cap secured upon said one end of said handle and enclosing a push;

button chamber and having an opening through the end thereof, a push button projecting throu h said opening, a washer fixed upon the push button, inwardly-directed portions upon said one end of the rods and engaging the innermost face of said washer, a disc having a pair of spaced holes through which said rods extend and being disposed inwardly of and-abutting said inwardlydirected rod portions, a spring disposed in said chamber between the disc and the handle, a pair of opposed spring fingers fixed in end slots in the otherend of said rods beyond said guide plate and being biased toward said screw-engaging shank, the free end of said fingers being provided with screw-engaging jaws, and a pair of round knobs or lugs fixed upon both sides of said screwengaging shank in longitudinal alignment with said rods and engaging the adjacent surfaces of said springfing ers, whereby depression of said push button causes longitudinal movement of said sides of and e idpeziding longitudinally of the 'said one end of the rods and operatively secured to said push button, spring means disposed in said chamber and operatively connected to said one end or said handle and said push button for biasing the push button into its projected position, a pair of opposed spring fingers fixed to the other end of said rods beyond said guide plate,

' the free end of 'said fingers being provided with screw-head-engaging jaws, and a pair of knobs fixed upon both sides of said screw-engaging shank in v e it dinal al nmen w h a d r and n agin the dja ent ur aces Q saidsn in fing he eb e ress n Qf Sa push u q causes longitudinal movement of said rods and said spring fingers relative to said shank and divergence ofsaid spring fingers.

ED AR T. DAUS REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 92,729. Kientofi July 20, 1869 192,901 Curtis July 10, 18.77 1,039,751 Ingram Oct. 1, 1912 1,212,743 Cowell Jan. 16, 1917 1,687,788 Pinkus Oct. 16, 192.8 1,950,644 Watson Mar. 1:3, 1934

Images