US2420591A - Snow plow - Google Patents

Description

May 13, 1947.

N, B. FRAME ET AL SNOW PLOW Original Filed Feb. 15, 1958 5 Sheets-Sheet 1 \Q INVENTORS. BY

A TTORNEYS.

- May 13, 1947.

N. .13. FRAME ET AL SNOW PLOW 5 sheets-sheaf 2 Original Filed Feb. 15, 1938 1f. W.Kei7lv INVEN TORS A TTOR N E YS.

May 13,-1947. N. B. FRAMEIETAL SNOW PLOW Original Filed Feb. 15, 1938 5 Shee ts-Sheet 4 NB. Frame J W. Ziea'm IN VEN TORJ'.

A TTORNEYS.

May 13, 1947. N. BNFRAME A1 SNOW PLOW Original Filed Feb. 15, 1958 S'Sheets-Sheet 5 IN VEN TORS 0 A TTORNEYS.

Patented May 13, 1947 wt n 1 rem d .Jahn W- Ke m fie khfln W- Substituted for application Serial No. 190,666,

Febmamy 15, 1938'. This aptLicetien-September :3, 19fi5, SBIia I'NO. 619,025

.1 Claim- 1 This inventien peletes Etq s ow plows, and par tieple 'ly to l aighway snow plows of the portable typede signed to be mounted on the front e ds f trp cksttractqrshr the li kejthis applieetion being filed as a substitute tor. our abandoned application, Serial No". 190,665.

it pprte t opieet of the invention is to EI- Yi a QIIQW p Qw of this e her-eater especially eo str ieted' fer 1156 on light ty iclis 011 trecters, the nstructiQ-r; of thepldw nqunti g being e c h that the plgw may be operated at a comp; a new mn fd we of sp ed, th u dw r p dam: ege 'to the plow oi meter vehicle to which it is etteched, Should the 919W strike a stetiepery obetmctiqr in the highway or road surface.

Another importantobjec't of the invention is to previde e, snow plow blade curved in such a Way hat b ed? wi l have a stoppi g a i sau ir lg th e Show to take a. swirling metien, with the pe eul th t the'tsnow is thrown laterally and broad: nested. eve-ply and not piled at the edge of the road as is eQ-mmop Withs qw piows new use, and which push or shqvethe snow to qne egge 1 th med.-

A til th r mm f he mv nnq i? to prgyide meahe whereby the putting edge of the blade will be protected against damage. by ,cqnf teet with the highway smfaee, when the blade. of h plQw lt 01? me tin an o t ut iq'nh the o n and e he lob-E ts in i w hi h l a ea s. he q es iptiq nmceeds; h nv nti ni r ides n th wmbim m a m-n -emem of art d in the d ai s ca new etruetipn hereinafter described anti claimed it b l d rftee th t Ch3$ t r pil t m qd et o e invent mi' e em described, m e ma e w thin hQ Q B at what i imed wi ho qe itin mm h spi bf t e men..- tion. V

Referring to the drawin s;

Figure 1 is sp qti i nventin QW plqw enfi m ted. n am -meme wi h h n em'iq as wnt a h 2mme sipf was re 2 s a pleeview 0; he mew mew? th lqw b ade bein i t-i 1:

Figure 3 e tical i nal i w vtv iwgh, e.- S qw lqw.

Fi ure l sfi ti nalfview ta en line 74 2? F hts: fi u e 5v is a a men al the View llus rating one end of the plow H e. Figure 6 is a. sectionalview taken cm line asp-5 F ure 7' e r nectiye illustratin the wex tismq mew h eiie tal 903 9 b twe n the 51mm mg mem e 1"- the M 9 h h suemrt the plcwt R nine 1 th dra n s in d a the sup- ;2,(? p r he ,SIIQW -lew i cludes angle be! ind-i etadt b t f en ch res r 5 to wh c h vte d-, ng rame C i secu ed b ldi e- A the bay th 6 is; on.- te onve e tetra-r21 t e 1,1QP.%'D 1 o th Whe e the a e nt men b mean 0? h E t n nwa d-1 m the ram 6, at sv .t ei y M t the ends of their .bm's J8, which hers I id h o'fit within the n s de 9f e usual cha n l hers mw siine the is m ls 15 ruck- Aas hawn hese hem ar mm within he open side of h channe ba s, and e qur s b m ans f el s 9 so tha he ma be re d nd ea i iscon e ted i em he truck o ehic un-por in t- The 19W?! nd-set the m m zite d ppr e. d t nszes. below he hers he lower ends Q i fi ame be b ace a inst ea d mQveb me nsvq h he s I9 hat are t d t h mi s 9 th w k a e gn the he forwar ends of h b rs b in bolted to the angle bar 5by the bolts l-l.

Supmrteq by h an l her 5 and ext ndin fewer-d v ther imm p in ad acen h ends. q he an le bets a e se tional bearin M he vremWe l .s ct qna Mini the beerhes hen h in p ace b we of he b lts 4- T-he e i nel bearin s Hpm ide a. s po e the It: n WhiQh the u ule-,r sept o s Ni 9 the veted su pq r ing mem ers n are meimfw ed. open nge are tame in the n of the sheit l5 fer he r ee i f uit e. tt k y qr b l s vWhe eby. th s a t ma be ewed wi the support for the blade of the snow plow, which is indicated by the reference character I 8. The connection between the plow blade l3 and the pivoted supporting members I1, is made through the rods |9 that are welded within the pivoted supporting members IT, as clearly shown by Figure 12 of the drawings. The blade ll? of the snow plow, is braced throughout its length, by means of the channel bars 20 arranged in transverse spaced relation with respect to each other, the channel bars being curved to conform to the curvature of the blade, to support the blade against transverse bending, should the plow meet with an obstruction. Extending longitudinally of the blade I8 is an angle bar 2| that is welded to the channel bars 20, as shown by Figure 2 of the drawings. Extending rearwardly from the angle bar 2|, at points adjacent to the ends thereof, are bearing plates 22 that are formed with aligning openings for the reception of the bolts 23. Positioned on the bolts 23 and arranged between the bearing plates 22, are sleeves 2 1 to which the straps 25 are welded, the free ends of the straps being spaced apart to accommodate the end of the rods l9, said straps being formed with openings to accommodate the bolts 23 pivotally connecting the rod I9 with the straps. Thus it will be seen that due to this construc tion, the plow may be moved laterally on the bolts 26, and vertically on the bolts 23. Secured to the shaft l5, and rising therefrom at a point substantially intermediate the ends thereof, is a substantially short channel bar 21 which is formed with an opening to receive one end of the eye bolt 28 which is adjustably held to the channel bar 21, by means of the nuts 29. Connected with this eye bolt 23, is a link 29 that has pivotal connection with the tubular housing 30 in which the coiled spring 3| is held. (Jne end of the tubular housing 38 is closed by means of the ring 32, which provides a stop for one end of the coiled spring 3| restricting movement of the coiled spring in one direction so that the spring 3| will be compressed, when pressure is brought to bear on the opposite end of the spring. Extending through the ring 32, and through the coiled spring 3!, is a length of chain indicated by the reference character 33, the inner end of the chain being connected wtih the eye bolt 34 that ,extends through the disk 35 which is formed with an opening to receive the eye bolt, there being provided a nut 36 for securing the eye bolt to the disk. At the opposite end of the chain 33, is a link 3'! having openings to receive the bolt 38 designed to secure the link and one end of the chain, to the curved rib 39 extending from the rear of the plow blade. A plurality of spaced openings indicated at 4B are provided in the rib 39 so that the link 31 may be adjusted longitudinally of the rib 39 to vary the tension of the spring 3|, and adapting the plow for various road conditions.

The frame 6 provides a support for the cylinder 49' in which the piston rod 4| extends, the piston rod carrying the usual piston at its inner end. Secured to the outer end of the piston rod il is a pulley support 42 in which the pulley 43 operates. A pulley support indicated by the reference character 44 is secured at the upper end of the frame 6, and extends towards the plow blade of the machine. The pulley 45 operates in the pulley support M. Operating over the pulleys 43 and 45 is a cable 46 that has one end thereof connected to the hook 4'! that is hooked into the link 48 of the chain 49, that in turn is se- 4 cured to the rear of the plow blade l8. The opposite end of the cable 46 is secured to the cylinder 49, at 50. A pump handle indicated by the reference character 5| forms a part of a suitable pump mounted on one end of the cylinder 40, whereby air may be forced against the piston of the rod 4|, to move the piston rod and pulley 43 supported thereby, away from the lower end of the cylinder. It is obvious that as the piston rod dl moves outwardly, the cable is shortened, and the plow blade of the machine is elevated. In order to lower the plow blade, it is only necessary to release the air in the cylinder 50, whereupon the weight of the plow will return the piston rod 4| to its normal position.

The reference character 52 designates forwardly curved plates formed with cut-out portions in which the nuts 53 are welded. Operating in the nuts 53, are bolts 54 that are supplied with lock nuts 55, whereby the bolts 55 may be held in various positions of adjustment. The heads 56 of the bolts 54%, provide stops against which the blade engages, restricting rearward movement of the blade, when it is returned to its normal operating position, by means of the coiled spring 3|. By adjusting these bolts 54, it will be obvious that the normal operating position of the plow blade may be adjusted to meet various requirements.

In order that the cutting edge 51 of the plow blade will operate in spaced relation with the ground surface over which the plow is moving, supporting wheels 58 are secured to the rear of the plow blade, the supporting wheels being ad justable vertically within the supports 59, adjusting the normal operating position of the blade.

As clearly shown by the drawings, the curvature of the blade is such that the snow is scooped by the cutting edge 5i thereof, and the snow is given a swirling motion discharging the snow through one end of the blade. Thus the snow is broadcast at the side of the road, and is not piled up along the edge of the road as is usual with snoW plows in common use. One end of the curved plow blade is closed by means of the plate 66, the plate being of a length to extend beyond the surface of the curved plow blade, providing a support for the blade, when the blade is tilted to a position as shown by Figure 1 of the drawings. The lower front corner of the plate 69 is cut away and curved so that the blade may pivot readily to return to its normal operating position, after it has passed over an obstruction to move the blade. From the foregoing it will be seen that due to the specific construction of the blade, and the means for supporting the blade, the snow plow may be mounted at the front end of a rapidly moving truck, with the result that the time required in removing snow from the usual highway, will be reduced to the minimum.

In the event-that the plow should strike an obstruction such as a stone frozen in the road surface, the plow will tilt, from the position shown by Figure 3 of the drawings, to a position as shown by Figure 1, allowing the blade to move over the obstruction. Immediately upon passing over the obstruction, it is obvious that the blade will be returned to its normal operating position, by means of the coiled spring 3| which has been placed under tension by the forward movement of the upper end of the plow.

We claim:

In a snow plow, a support adapted to be mounted on the front end of a tractor, said support comprising a shaft, horizontal tubular memhere mounted on the shaft, the adjacent inner ends of the tubular members being spaced apart, tubular supporting members extending forwardly from the outer ends of the horizontal tubular members, a channel bar secured to the shaft and disposed between the adjacent ends of the horizontal tubular members holding the horizontal tubular members in spaced relation with respect to each other, a curved plow blade, rods extending into the free ends of the forwardly extended tubular members, means for mounting the plow blade for vertical pivotal movement on the forward ends of the rods, and means for yieldingly holding the plow blade in its operative position. NEWTON B. FRAME. JOHN W. KEIM.

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