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Publication numberUS1684322 A
Publication typeGrant
Publication dateSep 11, 1928
Filing dateApr 11, 1928
Priority dateApr 11, 1928
Publication numberUS 1684322 A, US 1684322A, US-A-1684322, US1684322 A, US1684322A
InventorsMartin Itjen
Original AssigneeMartin Itjen
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Snap hook
US 1684322 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Sept. 11, 1928.

M. ITJEN SNAP HOOK Filed-*Agiril 11 1928 I! I m @I Q =1 {IE3 l \l Inventor waif 17 Amrng Patented Sept. 11, 1928.



Application filed April 11, 1928. Serial No. 269,160.

The present invention relates to improvements in fastening devices and has reference more particularly to a snap hook that is of such construction as to relieve any strain bein placed upon the spring-pressed plunger of the snap hook.

A salient object of the present invention resides in the provision of a snap hook that can be'readily and easily opened to facilitate the attachment or disengagement of the snap hook from any suitable member, a spring pressed plunger being provided for normally holding the complementary jaw members of the snap hook in a closed position.

A still further object is to provide a snap hook of the above mentioned character which is simple in construction, inexpensive, strong and durable and further well adapted to the purposes for'which it is designed.

Other objects and advantages will become apparent during the course of the following description.

In the accompanying drawing, forming a part of this specification, and in which like numerals indicate like parts throughout the same:

Figure 1 is a view partly in elevation and partly in section of a snap hook embodying my invention showing the position of the coacting jaws when the springpressed plunger is in its normally projected position,

Figure 2 is a similar view showing the jaws in an. open position and the spring pressed plunger retracted,

Figure 8 is a side elevation of the snap hook, and j Figure l is a transverse sectlon taken approximately on the line 4C l of Flgure 1.

In the drawing wherein for the purpose of illustration is shown the preferred embodiment of my invention, the numeral 1 designates a solid rectangular shaped body portion that is formed at one end with an enlarged eye 2 for attachment of the snap hook to a chain or the like.

The opposite end of the body portion is formed with an enlarged socket 3 that eX- tends inwardly from the forward, end ofthe body to the intermediate portion thereof and pivotally supported in the forward portion of the socket 3 are the inner ends of a pair of coacting curved jaws designated by the nu morals & and 5 respectively, a pivotal connection being'illustrated at 6. These jaws are curved in opposite directions and project beyond the forward end of the solid body portion 1 for engagement with a link of a chain or the like.

members a and 5 are in a closed position. tThe inner ends of these leg members are beveled as shown at 9 for a purpose to be presently described.

The rear portion of the body 1 is formed with a centrally located cavity 10 that communicates at its forward end with the rear end of the socket 3 and arranged within the forward end portion of this cavity is a plungcr 1 1, the forward end thereof beingbcvoled on opposite sides to form a head 12 that co operates with the beveled inner ends 9 of the spaced legs 7 and 8 in manner to be also later describedin detail. a

A pin 13 projectsfrom the rear end of the plunger 11 and a normally expanded coil spring 14 is arranged within the cavity 10, the rear end of the spring engaging with the lnnermost end of the cavity while the forward end ofthe spring encircles the pin 14 and engages with the rear end of the plunger 11. This spring normally urges the plunger 11 into the socket 8 so that the pointed head 12 will be disposed between the leg members 7 and 8 whereby to maintain the complementary aws t. and 5 in a closed position.

A slot 15 is formed in one side of the body 1 for communication with the socket 8 and extending through this slot is the screw eye 16 that is threaded into the slidable plunger 11 and the eye portion of this member projects beyond the outer face of the body 1 whereby to form a handle or knob to actuate the plunger.

If desired, a pin or wire may be passed through the eye to form a better handle or to operate the same from a remote point.

Normally the parts are arranged as shown in Figure 1 and the jaws'are held in a closed position so that the link not shown that is held between the aws cannot be disengaged therefrom. By sliding the plunger 11 rearwardly in the cavity 10, the pointed head 12 will be moved out of engagement from between the legs 7 and 8 and when the parts are arranged as shown in Figure 2, the jaws 4 and 5 may be'swung on their pivotal connection G to an open. position whereby to remove or insert the link of a chain. y

- By releasing the actuating member 16, the spring 14 which has. been placed under tension by a rearward sliding movement of the plunger 11 will exert an outward pressure on the plunger to move the same forwardly in the socket member 3 so that the pointed head 12 will ride along the beveled inner ends 9 of the leg members and will again be disposed between the inner opposed sides of the leg members as showninli igure 1 to maintain the complementary jaws in a locked position. a It will thus be seen from the foregoing de scription, that I have provided a snap hook which is very simple in its construction and operation and which will furthermore at all times be positive and efficient in carrying out .the purposes for which it is designed.

Furthermore the simplicity of my device renders the snap hook strong and durable and very inexpensive in its manufacture.

.While I have shown the preferred embodi ment of my invention, it is to be understood that various changes in the size, shape and arrangement of parts may he resorted to, Without departing from the spirit of the invention and the scope of the appended claim.

What I claim is In a snap hook, a solid body formed at its rear end with an attaching eye, the forward end of the body being'formed with a rearwardly extending socket that terminates at the intermediate portion of the body, a pair of complementary j aw members pivotally sea cured at their inner ends in the outer end portion of the socket, said jaws projecting beond the forward end. of thebody, aninwardy extending leg formed on the inner end of each jaw, the inner end of each leg being bevelled, a plunger slidable in the rear portion of the socket-,the solid body being provided with a longitudinally extending cavity in the rear portion thereof which communicates with the rear end of the socket, said plunger being also slidable in. the cavity, the forward edge of the'plunger being bevelled to cooperate with the bevelled inner ends of the legs, a reduced pin formed onthe rear end of the plunger and disposed within said cavity, expansiblc coil spring arranged with in the cavity, the rear end of said spring engaging the rearend of the cavity, the forward end of said spring encircling the reduced pins and engaging the rear end of the plunger for normally urging the same forwardly into the socket for disposition between the legs to maintain the jaws in a closed position, said i

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4884322 *Mar 30, 1982Dec 5, 1989Hope JaquithCoupling device
US5027477 *Mar 20, 1989Jul 2, 1991Seron Manufacturing CompanyBreak away lanyard
US5275452 *May 27, 1993Jan 4, 1994Cleveland Joe HQuick release connector
US5474278 *Dec 23, 1991Dec 12, 1995Cleveland; Joe H.Backpack mounted device for moving loads
US5867877 *Aug 15, 1997Feb 9, 1999Turtle Snaps, Inc.Self-releasing coupler
US6654990 *May 6, 2002Dec 2, 2003Chung-Shan Institute Of ScienceQuick-release hook
US7076910 *May 18, 2004Jul 18, 2006Jorge XifraFlash landing and control device
US7344553Mar 14, 2003Mar 18, 2008Nmt Medical, Inc.Coupling system useful in placement of implants
US7571523 *Sep 22, 2005Aug 11, 2009Rick BeedRetractable hook system and method
US8491627Mar 3, 2008Jul 23, 2013W. L. Gore & Associates, Inc.Coupling system useful in the placement of implants
US20030181945 *Mar 14, 2003Sep 25, 2003Nmt Medical, Inc.Coupling system useful in placement of implants
US20070243747 *Mar 5, 2007Oct 18, 2007Terry KinskeyMulti-purpose utility clasp apparatus
US20080083100 *Sep 22, 2005Apr 10, 2008Rick BeedRetractable hook system and method
US20080154302 *Mar 3, 2008Jun 26, 2008Nmt Medical, Inc.Coupling system useful in the placement of implants
WO1999008559A1 *Aug 7, 1998Feb 25, 1999Patterson Gregory SSelf-releasing coupler
U.S. Classification24/598.5, 24/600.7
International ClassificationF16B45/06, F16B45/00
Cooperative ClassificationF16B45/06
European ClassificationF16B45/06