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Publication numberUS2632949 A
Publication typeGrant
Publication dateMar 31, 1953
Filing dateSep 17, 1951
Priority dateSep 17, 1951
Publication numberUS 2632949 A, US 2632949A, US-A-2632949, US2632949 A, US2632949A
InventorsPasquale Falcone
Original AssigneePasquale Falcone
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Knife
US 2632949 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

March 31, 1953 P. FALCONE 2,632,949

KNIFE Filed Sept. l'?, 1951 Pasquale Falcons INVENTOR.

. u iu s ht Patentecl Mar. 31, l953 '1'; f

UNITED STATES: PATE f KNIFE Pasquale Falcone, Bronmfl. Ye Application September 17, 1951, Sel No. 246,939

The present invention relates to new and useful improvements in knives of the projectable and r'etractible blade type and has for one of.

important objects to provide, in a manner as hereinafter set forth; a device of this character comprisingnovel means for positively locking the spring actuated slidable blade in retracted position, thereby insuring'saiety.

' Another very" important object of the invention is to provide a knife of the aforementioned char:- acter which embodies a unique construction and arrangement whereby the. blade will be firmly supported in projected or operative position.

"Other objects of the invention areto. provide a knife of the character described which willbe. comparatively simple in construction, strong, durable, reliable in use, compact, light in weight,

attractive in appearance-and which may be manufactured at low cost.

- All'of the foregoing andstill further objects and advantages of the invention will become apparent from a study of the specification, taken in connection with the arccompanying drawing,

wherein like characters or referencedesignate corresponding parts throughout the several views, and'wherein;

Figure l" is perspective-view" oi the knife" with the blade in retracted position; 7 s

Figure 21s a perspective view, showing the blade m proj'ected position;

Figure tl is a bottom plan newer the handleand a. top: plan view of the removable: plate,

showing the parts separated;

I Figure 4- is a view in verticallongitudinalsec tion, taken substantially on the line 4-4 of Figure: 1;

4 Figure 5 is a view in vertical longitudinal section, taken substantially on the line 5-5 oi:

Figure 2 Figured isa view intransverse section, taken The rear "or inner end wall I 511818 formed: therein a transverse slot or opening it. The forward or outer end wall 14 of the handle ID has formed 4; Claims. (Cl. 30--162)' therein a comparatively'large opening t1. tit-onsend; the removableplate l2 of the handle l-ll terminates in a right angularlyextending flange 18 having fixedthereon a bar or rib 19 which is engageable in andoccupiesa portion ofthe opera ing 11:. At its other end the removable: wall or plate 1 2 terminates in aresiiient flange 20 which is frictionally engaged with: the end wall is-for securing" thisend oi the-plate l'ttothe handle it,

Mounted Iongitudinallyin the-upper portion of the: handle it is. an inverted; substantially shaped guide zl. countersunk screws}: firmly secure the guide 2| in position. The screws '22 are threaded in spacers12'3 which are fixed suitable manner in the upper portionof the handle 10. Thus; a-space or chamber '24 isiproevided'in: the upperpor-tion of" the" handle Ill.

Mounted for longitudinal sliding movement the guide! t a blade '25 which maybe of any suitable type. Fixed on the tear or inner end portion oi the blade za is adependi ngxaperturedcar 25. The base or attaching portion 21 oi the ear 26 travels between the longitudinal edges of the substantially c-shapedi guide It. The e'ai 26 travels on a longitudinal rod 28 in the lower portionv oi the handlev 1'0, the end portions of which are mounted in openings provided there--- for. in the end walls l4 and ii: of said handle. The aperture the 25: accommodates the rod 28; The flanges 1 l8" and; 20 of theiplate IZ- secure the rod 28 against longitudinal movement A coil spring 29- is mounted on the: rear or inner end portion or the: rod- 28 tor engagement the: earls for projecting the-blade 25 As shown to advantage in Figurofi'of the draw ing, the car 26" is substantially T-sha'ped and slidably' mounted thereon is a blade retracting bar 30. The bar 30 has formed therein'a longi-- tudinal slot 3! which accommodates the car 26:

The retracting bar 30' extends slidably through the slot l-G inthe rear. end wall i15- oi the; handle 0 o p vide a rippin portion; as at 32-, which is always exposed. At its forward end, thebar .30 terminates in a 'rigl'lt angularly extending apertured flange 33 which is slidable on the rod 28- and which: is engageable the car 26' for retracting the blade 25 An inwardly or rearwardly turned resilient lip 34-011- the lower portion of the forward end waif ill of the handle I0 is engageable with the ear 26 for releasably securing the blade 25 in projected or operative position. On its forward-end portion, the retracting bar 30 further includes depending side cams or flanges 35. Secured as at 36 on the removable plate l2 oi the handle I0 is athe guide 2 I. At its rear or inner end, the latch 39 terminates in an upstanding lifting handle 4| which is operablefin a'slot or opening 42 provided therefor in the top H of the handle. Fixed on the free end portion of the latch 39 is a depending pin 43 which is operable through an opening provided therefor in the guide 2| and engageable in an aperture 44 in the rear or inner end portion of the blade for releasably securing said blade in retracted position.

Mounted longitudinally on the forward portion of the guide 2| is what may be considered a resilient shield or guard 45 for the blade 25. The guard 45 terminates in a right angularly extending forward end portion 46 which rides on the upper side of the blade 25.

It is thought that the operation of the knife will be readily apparent from a consideration of the foregoing. Briefly, the latch 39 looks the blade 25 in retracted position, the pin 43 engaging in the aperture 44 in the manner shown to advantage in Figure 50f the drawing. With the blade in closed or retracted position, it will be observed that the spring 29 is compressedbetween theear,

26 and the inner endwall i5, ofv the handle ill. The substantially T-shaped resilient finger 37 is engaged with the cams for retaining, the retracting bar 30 in forward position inthe handle Ill. To release the blade, the latch 39 is lifted through the medium of the handle 4| for disengaging the pin 43 from the aperture 44, thus permitting the coil spring 29 to hurl the blade forwardly in theguide 2! to projected position. As hereinbefore stated, the blade is retained in pro.- jectedposition by the resilient lip or element 34 engaged with the ear 26, To retract the blade, the bar 30 is pulled rearwardly, the flange 33 on the forwardend thereof engaging the ear 26 on the blade, the resilientv flngertl riding. over the cams 35.

As the blade 25 tion, the spring 29 is againcompressed by the ear 26, after which the pin 43, engages in the aperture 44 for again locking said blade. The flange 46 of the guard ABrideso-nthe upper side of the blade and is shapedto accommodate the pointed forward end portion; thereof. It will be. observed, however,- that the .blade25 is not retracted quite farenough to permit the flange of the resilient invention will be readily understood and although,

a preferred embodiment of the device is as illustrated and described, it isto be understood that changes in the details of construction and in the combination and arrangement of parts may be, resorted to which will fall within the scope of the invention as claimed.

approaches its retracted posi- Having described the invention, what is claimed as new is:

1. A knife comprising a hollow elongated handle, a guide mounted longitudinally in said handle, a blade slidable in the guide and adapted to be projected from one end of the handle, resilient means in the handle for projecting the blade, manually operable means for retracting the blade, and means for releasably locking said blade in retracted position, said retracting means comprising a bar slidably mounted in the handle and projecting from the other end thereof, and means operatively connecting the blade to said bar for actuation thereby toward retracted position.

2. A knife comprising a hollow elongated handle, a guide mounted longitudinally in said handle, a blade slidable in the guide and adapted to be projected from one end of the handle, resilient means in the handle for projecting the blade, manually operable means for retracting the blade, and means for releasably locking said blade in retracted position, the last-named means including a resilient latch mounted on the guide.

a handle on the latch projecting from the firstmounted in the guide and operable in one of the openings to projected position, a longitudinal rod in the handle, an ear on the blade slidable on said rod, a coil spring mounted on the rod and engaged with the ear for actuating the blade to projected position, a manually actuated bar slidable in the handle and operable in the other opening and operatively connected to the blade for retracting A same, and means for releasably securing the blade in retracted position against the tension of the spring.

4. A knife comprising an elongated hollow handle including end walls having openings therein, a substantially C-shaped guide mounted longitudinally in the handle, a blade slidably" mounted in the guide and operable in one of the openings to projected position, a longitudinal rod in the handle, an ear on the blade slidable on said rod, a coil spring mounted on the rod and engaged with theear for actuating the blade to projected position, a manually actuated bar slidable in the handle and operable in the other opening and operatively connected to the blade for retracting same, and means for releasably securing the blade in retracted position against the tension of REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Number Date 845,792 Jenkins Mar. 5, 1907

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US845792 *Dec 3, 1906Mar 5, 1907Luther Edward JenkinsKnife.
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2854745 *Dec 26, 1956Oct 7, 1958Benjamin HertzKnife
US3176395 *Dec 27, 1963Apr 6, 1965Warner David HPhotoengraver's saber
US5779647 *Jun 7, 1995Jul 14, 1998Chau; SonnyAutomated biopsy instruments
US6626850Mar 30, 1998Sep 30, 2003Allegiance CorporationAutomated biopsy instruments
US6837807 *Jan 21, 2003Jan 4, 2005Kerr Macauley DuffGolf green repair tool
US8572852 *Nov 21, 2011Nov 5, 2013Dale E. JenningsSafety cutting device
US20080222897 *Mar 12, 2007Sep 18, 2008Microtech Knives, Inc.Knife with blade stop structure
Classifications
U.S. Classification30/162
International ClassificationB26B1/00, B26B1/08
Cooperative ClassificationB26B1/08
European ClassificationB26B1/08