US2728139A

US2728139A - Pocket knife construction

Info

Publication number: US2728139A
Application number: US375642A
Authority: US
Inventors: Eric C Erickson
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-08-21
Filing date: 1953-08-21
Publication date: 1955-12-27
Anticipated expiration: 1972-12-27

Description

Dec. 27, 1955 E. c. ERICKSON 2,728,139

POCKET KNIFE CONSTRUCTION Filed Aug. 21. 1955 Eric C. Erickson JNVENTOR.

" nite irtates Patent il 2,728,139 Patented Dec. 27, 1955 POCKET KNIFE CONSTRUCTION Eric C. Erickson, Titusville, Pa.

Application August 21, 1953, Serial No. 375,642

1 Claim. (Cl. Z50- 155) This invention relates to new and useful improvements and structural refinements in pocket knives, and the principal object of the invention is to provide a pocket knife of the character herein described, which is extremely simple in construction and which may be quickly, easily, and economically manufactured from the standpoint of a. small number of parts and expeditious assembly.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully here inafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure l is a side elevational view of the invention:

Figure 2 is a top edge View thereof;

Figure 3 is a fragmentary, longitudinal, sectional view on an enlarged scale, taken substantially in the plane of the line 3 3 in Figure 2;

Figure 4 is a group perspective view illustrating the components of the invention; and

Figure 5 is a sectional view, similar to that shown in Figure 3 and illustrating the manner in which the spring member used in the invention is installed in the knife casing. l

Referring now to the accompanying drawings in detail, the pocket knife is designated generally by the reference character and embodies in its construction an elongated hollow casing 12 having an open lower edge 14, an open front end 16, a closed rear end 18, and a closed upper edge 2l), the latter being provided with a recess extending forwardly from the closed rear end 18 as is clearly shown in Figure 3,

A transverse pin Z4 is mounted in the open end por tion 16 of the casing 12 and a projectable and retractabie knife blade 26 is swingably mounted on the pin 24 in the conventional manner. Moreover, an elongated spring member 28 is disposed in the casing 12 in abutment with the `closed upper edge 2i) of the casing, one end portion 30 of this spring member operatively engaging the knife blade 26 in the conventional manner, so asto sustain the knife -blade selectively in an open or a closed position.

The other end of the spring member 28 is provided with an anchoring element 32 which is disposed in the recess 22 of the casing 12 and abuts a right angled transverse shoulder 34 formed integrally with and extending forwardly from the closed rear end 18 of the casing. As is clearly shown in Figure 3, the shoulder 34 is disposed under the recess 22 is spaced downwardly therefrom and is narrower than the length of the recess 22.

To facilitate convenient and expeditious assembly of the knife, the recess 22 of the casing 12 is of such size forwardly of the shoulder 34 as to permit the entire length of the spring member 23 to be slid through the recess forwardly of the shoulder 34 in the direction of the arrow 36 in 'Figure 5. Conversely, if the knife is to be disassembled, the spring member may be withdrawn in the same manner.

Finally, it will also be observed that the anchoring element 32 of the spring member 28 is formed with a right angled notch 38 engaging and straddling the shoulder 34 of the casing.

From the foregoing, the construction and operation of the device will be readily understood and further ex planation is believed to be unnecessary. However, since .numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claim.

What is claimed as new is as follows:

A pocket knife construction comprising a hollow casing having an open lower edge, a closed rear end, an open front end and a closed upper edge provided with a recess extending forwardly from said closed end, a right angled shoulder extending forwardly from said closed end and underlying said recess transversely in downwardly spaced relation therefrom, a transverse pin provided in the open end portion of said casing, a projectable and retractable knife blade swingably mounted on said pin, an elongated spring member positioned in said casing in abutment with the closed upper edge thereof, one end portion of said spring member operatively engaging said blade, the other end of said spring member being disposed in said recess and having a right angled notch engaging and straddling said shoulder, said other end of Said spring member fitting between said closed rear end and one end of the recess, said recess extending forwardly of said shoulder so that said spring member may be slid through said recess into said casing.

References Cited inthe le of this patent UNITED STATES PATENTS 1,104,896 Hotchkiss July 28, 1914 FOREIGN PATENTS 27,144 Great Britain Nov. 25, 1912 30,078 Germany Ian. 5, 1885 600,896 France Nov. 21, 1925