US2642294A

US2642294A - Snowplow attachment

Info

Publication number: US2642294A
Application number: US193059A
Authority: US
Inventors: Julius A Holm
Original assignee: LAWRENCE LINDSTROM; STANLEY G WALES JR; WALTER LINDSTROM
Current assignee: LAWRENCE LINDSTROM; STANLEY G WALES JR; WALTER LINDSTROM
Priority date: 1950-10-31
Filing date: 1950-10-31
Publication date: 1953-06-16
Anticipated expiration: 1970-06-16

Description

June 16, 1953 J. A. HOLM 2,642,294

SNOWPLOW ATTACl-lMENT Filed Oct. 31, 1950 s Sheets-Sheet 1 Fig.2

i so 82 1 i3 8/ I08 1 0 ii. i

Julius Ho/m 1N VEN TOR.

June 16,1953 J. A. HOLM 2,642,294

' SNOWPLOW ATTACHMENT.

Filed Oct. 31, 1950 3 Sheets-Sheet 2 Fig.3 5+- Ju/ius A. Ha/m JNVENTOR.

June 16, 1953 J. A. HOLM 2,642,294

SNOWPLOW ATTACHMENT Filed 001;. :51, 1950 s Sheets-Sheet 3 Fig.5

Julius A. Hal m INVENTOR.

truck.

Patented June 16, 1953 sNOWPLOW ATTACHMENT Julius A. Holm, Iron River, Mich., as's'ignor of onethird to Stanley G. Wales, In, one-sixth to Walter Lindstrom, and one-sixth to Lawrence Lindstrom, all of Iron River, Mich.

Application October 31, 1950, Serial No. 193,059

2 Claims.

The present invention relates to improvements in snow plow attachments and more particularly to the means whereby a snow plow attachment may be readily attached to the front end of a truck or the like for plowing.

An object of the present invention is to provide a novel connecting means for snow plow attachments whereby the same may be readily attached or detached from a push frame means mounted on the underside of a truck.

Another object of the present invention is to provide a novel connection between a snow plow attachment and a truck wherein a shaft is transversely mounted on the plow means for vertical reciprocation in response to a manually actuated meansin order that the shaft may be aligned with the bifurcations in the front end of the push frame means mounted on the underside of the truck, a pair of latching elements being pivotally mounted on the pushframe means forengagement with the shaft when it is positioned within the bifurcations in order that they may be releasably maintained therein; thereby con-' necting the plow means for movement with the Still another object of the present is to provide a novel means for attaching a snow. plow to a truck which requires but littlechange to the truck to adapt it for snow plowing.

A further object of the present invention is to provide a snow plow attachment which is simple in construction, economical of manufacture,

V readily assembled and of general superiority.

Various other objects and advantages will become apparent from the detailed description to follow. 7 The best form in which I have contemplated applying my invention is clearly illustrated in the accompanying drawings, wherein:

Figure l is a side elevational view of a truck with the snow plow attachment mounted thereon and showing the manner in which the push bar means are mounted on the underside of the truck;

Figure 2 is a rear elevational view of the snow plow attachment;

Figure 3 is a side elevational .view of the snow plow attachment mounted on the front end of the truck with parts in section;

Figure4 is a top plan view of the present invention;

Figure 5 is a vertical transverse sectional view taken substantially along the plane of line 5-5 of Figure 3; and V Figure 6 is a vertical longitudinal sectional view taken substantially along the plane of line 6-6 of Figure 4.

invention 2 Referring more particularly to the drawings, wherein like numerals designate like parts throughout, the numeral l0 designates generally a truck to which the snow plow attachment I2 is attached,the numeral l4 designates generally v the lifting means for the snow plow attachment l2, the numeral 16 designates generally the push frame means which is mounted on the undersideof the truck H] to which the snow plow attachment [2 is attached, the numeral l8 designates generally the means for attaching the snow plow attachment l2 to the push frame means It.

The truck I0 is provided with an A-frame 25 which is substantially of conventional form and forms no part of the present invention. A supporting bracket 22 is secured to the front end of the truck 10 and has a channel iron member 24 transversely disposed thereon. The upwardly extending A-frame 20 is comprised of a pair of

bars

26 and 28 which are joined at their upper ends to form a bearing portion 36. A fluid actuating cylinder 32 is pivotally mounted at its lower end between the A-frame at 34 and has its plunger end 36 connected to an intermediate point of the lever 38 which is pivotally mounted between the bearing portion 30 of the A-frame 26. The outer end of the lever 38 is provided with a chain 40 which has its lower free ends adapted to be connected to a pair of eye hooks 42 on the snow plow means l2. It will thus be seen that the means l4 may be actuated to raise and lower the chain 40 and the snow plow means 2 to be hereinafter described.

The means to which the snow plow attachment [2 is attached comprises the push frame I 6 which will now be described. The push frame I6 is formed of a pair of elongated bars 44 which have their'rear ends formed with offset portions 46.-

A pair of brackets 48 are secured to the frame of the' truck [0 immediately behind the cab II and on the underside of the truck. The offset portions 46 are pivotally attached to the brackets 48 by means of the shaft 50. 7

Intermediate portions of thebars 44 are supported by the front wheel axle as will readily be seen from Figure 5. A pair of U-shaped

bolts

52 and 54 pass over the "axle and are attached to the bars 44 joined by a crossbar 56.

The forward ends of the push bars 44 are bifurcated at 58 and 60 for a purpose to be hereinafter described. Each of the forward ends of the push bars 44 is connected by a shaft 62 and a pair of

latch elements

64 and 66 are secured to the shaft 62 for pivoting therewith. The

latch elements

64 and 66 are provided with notched The snow plow attachment l 2 is provided with a pair of curved plow plates '13 and i l providing a V-type plow. Th plow plates ?3 and M are joined by a pair of V-shapedplates Iiiand T8 to which are attached a pair of upstanding" angle irons 89 and 82. Angleirons 8d, which are vertically extending, are also secured to the inner faces of the plow plates it and i8, and a pair of angle iron elements 36 and 8% connect the tops of the upright angle irons 84 and are secured to the underside of the plate 16 and the upperside of the plate E8 to form a substantially rectangular rigidifying means. An eye hook Gris secured to either end of the angle iron. 83 and is-adapted to receive the lower ends of the chain' it as hereinabove described. 1

A transversely extending arcuated plate 8! connects the plow plates 13 and it and is attached to the base edges of the plates 76 and it and angle irons 84, B6 and 83. The

angle irons

80 and 32 are in turn secured to the back side of the plate 8! and have upstanding bars 03 and 85 secured thereto.

A transversely disposed plate 99 is secured to the plow means 12 behind the

angle iron elements

80 and 82, and a hollow rectangular frame 91 formed of a plurality of channel iron elements is positioned between the plate 92 nd angl iron elements 8?} and 82 to 'rigidify the structure. The plate 90 is provided with a pair of

outstanding plates

92 and 94 which are disposed adjacent the ends thereof in parallel relation. Each of the

plates

92 and 94 is provided with an elongated slot 98 which-is formed with a thickened lip portion 98 encircling the slot. The slots 95 are in upstanding relation and are adapted to slidably receive the ends of a shaft I which is held from transverse displacement by means of the annular rings I02 and i 0%. Each of the plates 92 and 9 3 is provided with an upstanding ear I and a shaft 108 is rotatably disposed in the ears I 0'6. The shaft I08 is provided with a plurality of lever arms H9 and I i2, the arms H0 being provided for manual pivoting movement of the shaft 108 and the lever arms H2 having chains i It connected thereto with their lower extremities attached to the shaft I00 for vertical reciprocation thereon in response to pivoting movement'of the lever arms H2. Thus it will be seen that the shaft H may be vertically adjusted for positioning in alignment with bifurcations E9 and 60 on the push bars 45.

In View of the foregoing, it will readily be seen that when it is desired that the snow plow attachment 1? be attached to the truck (0, the truck is driven to a position immediately behind the snow plow attachment with the forward ends of the push frame means l6-being juxtat posed to the shaft 00. The shaft I00 is then vertically adjusted by manipulation of the lever arms 1 l0 and the truck is then moved forwardly until th bifurcations engage the shaft l 00. The hand lever 10 is then pivoted so that the latch elements fit, pivot downwardly with the notch 08 engaging the shaft N20 to retain it within the bifurcations in the forward ends of the push bars 134. The snow plow attachment l2 isinow securely mounted for movement with the truck. .Iil. Of course, the lower ends of the chain 49 are connected to the eye hooks 42 so that the snow plow attachment may be raised and lowered in response to actuation by the fluid pressure means M.

In View of the foregoing, it is believed that a device has been provided which will accomplish all of the objects hereinabove set forth. Of

course, certain modifications may be made and mechanical equivalents substituted for the individual means of the present invention, and I desire to be limited only to the scope of the claims hereinafter appended.

Having described the invention, what is claimed as new is:

l. A hitch for attaching a snow plow to a tractor comprising a pair of pusher bars adapted to be attached to the tractor to extend forwardly therefrom in laterally spaced relation and having forwardly opening bifurcated ends, a'pair of rearwardly extending vertically slotted plates rigidly attached to the snow plow and spaced apart to straddle said bifurcatedends, a cross shaft vertically adjustable insaid slots for horizontal alignment with said bifurcated ends to be entered into the same, latch devices on. said bars for retaining said shaft in said bifurcatedends, and manually operative devices carried by said plates for adjusting said shaft vertically.

2. A hitch according to claim 1, said lastnamed devices comprising a transverse rock shaft pivoted on said plates, lever arms on said rock shaft adjacent opposite ends of the vertically adjustabl shaft, flexible connections between said lever arms and opposite ends of the vertically adjustable shaft, and a handle on at least one of said lever arms for operating the same to rock said shaft.

' JULIUS A. HOLM.

References Cited in the file of this patent UNITED STATES PATENTS 450,125 Great Britain July 10, 1936