Патент USA US2407830код для вставки
Sept. 17}, 1946. T. R. GRIFFIN “ LOCK NUT‘ Filed June 5, 71943 nil 2,407,830 2,407,830 Patented‘ Sept. 17, 1946 STAT Es PATENT cert-cs1. 2.407330 no'oK NUT Theodorei Griffin; Belmont,1Ma‘ss., tas'sig'nor to‘ . United- Carr: Fastener Qorporatio'n, Cambridge; Masssea?corporation- of Massachusetts-‘ Animation-Juries; 1943, sesame: 4892851 3 “Claims. (01. 151-14’) Tih'el- present '1 invention »~re1ate§ a. to tension nutsi forfscrefw threaded’fastenings and aims generally? nearly’ resemble" the? snaps “0f? the‘inlli?‘el'éil T3 as? shown in Fig. 5. to simplify and improve existingi riuts'i of? this’? _ ‘ The‘) terminal endsl l5 of the ?ngers; M‘ are type. One'iof4the primary?» ob’ie'cts of the invention ?t Iin‘tb and ‘ seat in- the threads 10f‘ the!‘ screw?‘ I33.’ Preferably the free terminal ends l5 of the ?ngers is the provision of an improved tensional nut l4 are normally disposed inwardly of the path formed of sheet metal having a base and an of the screw (as indicated in dotted lines, Fig. 4) interiorly threaded barrel drawn therefrom with so as to be expanded outwardly thereby and a plurality of locking ?ngers tensionally engag thus engage in the threads of the screw l3 under 10 ing the threads of a screw passed through the tension of the resilient ?ngers Hi. barrel beyond the end thereof to effectively resist It will be observed from the drawing that as unintentional rotation of the screw in the nut the screw I3 is threaded through the nut barrel in a withdrawing direction. l0 into engagement with the axially spaced ?n A further object of the invention is the pro vision of a tension nut of the type above de 15 gers, the ends l5 of the ?ngers will be expanded by the nut and will be seated in the threads. As scribed which may be quickly and economically the lead of the threads of the screw I3 is towards manufactured. the head end thereof the upper portions of the Illustrative of theinvention, reference is made bowed ?ngers l4 and the terminal ends I5 thereof to the accompanying drawing showing preferred 20 will be twisted to a slightly inclined position fol embodiments of the invention and in which: lowing the lead of the screw as shown in Fig. 3. Fig. 1 is a side elevation of one embodiment The ?ngers I4 thus engage in any section of of my improved tensional nut shown as applied to a screw; Fig. 2 is a plan view thereof; thread with an inward tension as well. as an upward thrust. The ends of the ?ngers l4 thus Fig. 3 is a side elevation as viewed from a side 25 exert a resilient tension on the opposed inclined faces of the threads of the screw and provide a at right angles to Fig. 1; drag to resist rotation of the screw in the nut. Fig. 4 is a vertical sectional view of the nut; This tension on the screw is sui?cient to resist and accidental rotation of the screw in unthreading Fig. 5 is a side elevation of an installation em or withdrawing direction so that an installation ploying a slightly modi?ed form of tension nut, parts of the installation being shown in section. Referring to the drawing, the nut proper com prises a tubular barrel [0 interiorly threaded as embodying the tension nut of the present inven tion is secure against unintentional loosening after ?nal tightening. It is not necessary that opposed ?nger ends ing base 12 preferably disposed in a plane at right 35 I5 lie in the same plane and seat‘ in the same convolution of the thread of the screw as shown angles to the barrel. The barrel l0 and base l2 in Fig. 1. They may be disposed in different are advantageously formed of sheet metal and planes spaced axially from the end of the barrel the barrel may be drawn from a blank contain l0 and engage in different convolutions of the ing the base by regular drawing operations, asv 40 screw as shown in Fig. 5. will be readily understood. at H , and integrally joined to a laterally extend The nut is provided with screw thread engag A conventional installation comprises one or ing and locking means preferably integral with more apertured pieces of work or parts l8 through the barrel l0 and adapted to engage the threads which the screw is passed and threaded into the of the screw I3 at points spaced from the outer nut on the side of the Work opposite the head of end of the barrel. In the illustrated embodiment 45 the screw as shown in Fig. 5. The base l2 may of the invention this locking means comprises a simply bear upon the adjacent face of the work plurality of outwardly bowed resilient ?ngers l4 or be rigidly secured to the work as by rivets integrally joined to and extending outwardly [9 as desired. from the end of the barrel. For purposes of Advantages of the invention are the simplicity illustration, I have shown but two of such ?ngers 50 of construction, effectiveness of operation as well l4 extending from opposite sides of the barrel as economy in the cost of operation. As will though it will be apparent that a larger number be apparent, the barrel may be drawn to a greater of ?ngers may be employed. The ?ngers 14 may length than illustrated in the drawing and end be bowed in such manner as to be substantially sections removed from opposite sides to leave the V-shaped as shown in Figs. 1 and 4 or to more 55 2,407,830 4 ?ngers I4, which may then be bowed and shaped metal and having a tubular internally threaded to provide thread-engaging ends. screw-receiving barrel and a base disposed at right angles to said barrel, and locking means integrally connected as a part of the nut for engaging the screw beyond said barrel, said lock Although I have illustrated and described pre ferred forms of my invention, I do not wish to be limited thereby because the scope of my in vention is best de?ned by the following claims. I claim: ing means comprising a plurality of bowed v resilient ?ngers of relatively greater width than thickness and having thread-engaging edge por tions normally disposed withinthe path of the 1. A lock nut‘ for cooperation with a screw passed through an apertured piece of work, said nut being formed from a single piece of sheet 10 threads of the screw thereby 'to engage the metal and having a tubular internally threaded - threads of the screw under tension to resist turn screw-receiving barrel and a base disposed at > ing thereof in withdrawing direction. right angles to said barrel, and locking means‘ ‘ 3. A lock nut for cooperation with a screw integrally connected with the end of the barrel passed through an apertured piece of work, said opposite the head for engaging the screw beyond nut being formed from a single piece of sheet said barrel, said locking means comprising'a 15 metal and having'a tubular internally threaded plurality of outwardly bowed resilient ?ngers screw-receiving barrel, a plurality of wings in having end portions normally disposed within tegral with said barrel and extending beyond the path of the threads of the screw and expand ible thereby to engage the threads of the screw one end thereof, said wings being bowed out wardly and having ends inturned and formed under tension to resist turning thereof in with drawing direction. » with terminal edges adapted to engage under tension in the threads of the; screw passed ' 2. A lock nut for cooperation with a screw passed through an apertured piece of work, said nut being formed from a single piece of sheet through said :barrel. 25 THEODORE R. GRIFFIN.