US2282753A

US2282753A - Road grader

Info

Publication number: US2282753A
Application number: US300029A
Authority: US
Inventors: Franklin E Arndt
Original assignee: Galion Iron Works & Manufacturing Co
Current assignee: Galion Iron Works & Manufacturing Co
Priority date: 1933-02-02
Filing date: 1939-10-18
Publication date: 1942-05-12
Anticipated expiration: 1959-05-12

Description

ROAD GRADER original Filed Feb. 2, 1953 g sheets-sheet 1 F. E. ARNDT ROAD GRADER Mayf-IZ, 1942,

l original Filed Feb. 2, 1933 2 Sheets-Sheet 2 man..

NVENTOR FRANKLIN E ARNm;

BY @Za/x. 7W.

A TTY Patented May 12, 1942 ROAD GRADER n Franklin E. Arndt, Galion, Ohio, assignor to The Galion Iron Works & Manufacturing Company, a corporation of Ohio Original application February 2, 1933, Serial No.

Divided and this application October 18, 1939, Serial No. 300,029

1 Claim.

My invention relates to road building apparatus and one of its objects is the provision of improved and eicient fluid-pressure motor mechanism for electing various adjustments in a road grading machine.

Another object of the invention is the provision of improved duid-pressure operated mechanism for shifting the rear end of the frame of.

the road grader relatively to the rear Wheels.

Other objects of the invention will appear hereinafter, the novel features and combinations being set forth in the appended claim.

This application is a division of Vmy co-pendingapplication, Serial No. 654,901, led February 2, 1933, for an improvement in Road graders, Patent No. 2,247,464, granted July l, 1941.

In the accompanying drawings,

Fig. 1 is an elevation of a road grading machine embodying my improvements;

Fig. 2 is a plan view of the structure shown in Fig. 1; and

Fig. 3 is a rear elevation of the machine shown in Fig. 1.

The machine shown in Figs. 1 and 2 comprises the vehicle frame II mounted on the front Wheels I2, I2 and the rear wheels I3, I3. The frame II comprises longitudinal spaced-apart beams I4, I4 which are rigidly connected by the tubular cross-,pieces I5, I6, I1 and I8.

Secured rigidly to the rear ends of the longitudinal beams I4 is a cross supporting structure 82 (Fig. 1) comprising angle irons 83, 83 as shown in Fig. 3 and the cross-piece 84 shown in Fig. 2. Guides are provided at 85, 86 for the transverse members 81, 81 of the rear Wheel supporting frame. The

axles

88, 88 for the rear wheels I3, I3 are pivoted at 89, 89 to the ends of the frame 81. Secured to the rear wheel axles are

vertical crank arms

90, 90 the upper ends of which are pivoted at 9|, 9| to the cross-piece 92.

A vertical bracket plate 93 is secured to the frame 81 and to its upper end at 94 is pivoted a cylinder 95 of a hydraulic motor comprising a piston rod 96 the outer end of which is pivoted at 9| to the upper end of the crank arm 90 at the left-hand side of the machine as viewed from the rear (Fig. 3). The hydraulic motor comprising the cylinder 95 is double acting in that the liquid flows to and` from the cylinder 95 on both sides of the piston therein and the controlling valve is such that when it is closed the

crank arms

90, 90 will be locked in adjusted positions. The leaning of the rear Wheels may therefore be adjusted by means of the hydraulic motor comprising the cylinder 95 and locked in adjusted position. This mechanism for leaning the rear wheels is described and claimed in my co-pending application, Ser. No. 214,599.

In order to shift the rear end of the frame II relatively to the rear Wheels, a hydraulic motor comprising a cylinder 91 is pivoted at 98 to a bracket 99 which is secured to the frame 81. The piston rod |00 which is connected to the piston that moves in the cylinder 91, is pivoted at its outer end at |0| to a gear Wheel |02 meshing with the rack bars |03 and |04. The upper rack bar |03 is secured to the machine frame and the lower rack bar |04 is secured to the frame' 81. It can readily be seen that when the piston in the cylinder 91 is locked, the rack bars |03 and |04 are relatively stationary and therefore the gear Wheel |02 is locked against rotation. The hydraulic motor comprising the cylinder 91 is double acting and controlled by valve mechanism so that when the piston rod |00 is moved relatively to the cylinder 91, therear end of the main frame I I will be shifted laterally relatively to the rear wheels I3, by the gear |02 rolling on the rack |04 and driving the rack |03. When the piston in the cylinder 91 is locked, the pivotal axis at I 0| will be stationary relative to the cylinder 91. The rack bars I 03 and |04 will not interfere at any time with the operation of the rear Wheel leaning mechanism because when the vertical arms are rocked in either direction the racks |03 and |04 will remain stationary.

Obviously those skilled in the art may make various changes in the details and arrangement of parts without departing from the spirit andV scope of the invention as defined by the claim hereto appended, and I wish therefore not to be restricted to the precise construction herein disclosed.

Having thus described and shown an embodiment of my invention, what I desire to secure by Letters Patent of the United States is:

A vehicle comprising the combination with a supporting frame adjustable along an axletree having ground engaging supporting wheels at the ends thereof, spaced-apart rack bars one on said frame and the other on said axletree, a, gear meshing With said rack bars, and a reciprocating fluid pressure motor connected at oneend to said axletree and at its other end to said gear for bodily movement of the latter while said rack bars eiect rotation thereof to shift laterally the rear end of said frame relatively to the said supporting wheels.

FRANKLIN E. ARNDT.