US1147492A

US1147492A - Ground-breaking device.

Info

Publication number: US1147492A
Application number: US84338114A
Authority: US
Inventors: David Erter
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-06-06
Filing date: 1914-06-06
Publication date: 1915-07-20
Anticipated expiration: 1932-07-20

Description

0. ERTER.

GROUND BREAKlNG DEVICE. APPLmATmN ,FILED JUNE 6. 1914.

1,147,492. PdtentdJuly 20, 1915.

2 SHEETS-SHEET 2. I

l/vbtmwom UNITED STATES PATENT oFFioEf.

' DAVID ERTER', OF SPRINGFIELD, OHIO.

GROUND-BREAKING DEVICE.

eration and simple in construction.

- A further 'object of the invention is to provide effective means for applying pressure to the breaker when in operation and also for raising and holding the same n inoperative position during transportation.

A further object of the invention 1s to provide a; ground breaking device which may be readily attached to a road roller which is in service so that it will be unneced to.

essary to take the roller out of service for a material length of time and send 1t to ashop to have the groundbreaking device attached thereto. i v

. A' further object is to provide a ground breaking device, for attachment on a road roller, which shall be so connected to the roller thatit has a direct dragging act on thereon and is provided with a cushioning device whereby any lifting action of the ground on the breaking device will be taken up by the cushioningdevice, thus relieving.

the roller of the excessive arring and vibration which the breaking device 1s sub ect- A .fu'rther'object is to provide a ground breaking device, for attachment on a road roller which shall be so connected to the roller and with a cushioning device that the latterwill exert a substantially uniform pressure to force the breaker into the ground regardless of the depth of penetration.

In the accompanying draw1ngs:-F1gure 1 is a side elevation of the rear portion of .a road roller showing my improved devlces applied thereto. Fig. 2 isasection on the line 22 of Fig. 1. Fig. 3 .is a side viewof the piston guide head. Fig. fl is a section on portation. 1

acters of reference in the several views.

In the said drawings, 1 represents the tank of a road roller and 2 the rear wheels. The ground breaking device proper consists of a series of spikes 13 clamped between two channel bars 4 by/the bolts 5.. There is usu-- Patented July 20, 1915.

Application filed June 6, 1914. Serial No. 843,381.

ally attached to the back of the tank 1, a-

draw bar 26 which has several holes therein for the attachment of chains or other haul'- ingdevices. In the present case there is secured to the draft bar 26,'by bolts 26' which engage the holes in the draft bar, a pair of brackets 6, having bearings 7 in which bearings is rotatably mounted a transverse shaft 8; the brackets being braced by the bracerods 6, secured at their lower-ends to the bearings and at their 'upper ends to the tank! A pair of drag-bars 9, securely bolt- Q ed to the channel bars 4:, are keyed at their forward ends to the transverse shaft 8, as. shown in detail in Fig. 4, the keys being indicated by 10. One of the drag bars 9 has an upwardly extending crank arm 11, pivotally connected at its u per end toa link 12' which link 12 has its ,orward end pivotally connected to-the rod 13 of a piston (not shown) located in the cylinder 14, which cylinder is secured to the side of the tank 1.

The end of. the piston rod 13 has firmlyv Sec.

cured thereto a head 15, the upper end of which is provided with an integrally formed. sleeve 16 arranged to slide on the rigid guide rod 17 which is secured firmlyl to-the side of the tank by the brackets 18. The lower end of I this head 15 has oppositely extending trunnions 19 to which the link 12 is pivoted; the

link 12 being preferably formed of two members spaced apart by the blocks 12? and rigidly bolted together by. bolts 12 to permit it to be readily assembled, the crank arm 11 being pivoted between these members, the

rear ends of which are provided with a series of holes 20 to receive the pivot bolt 21 so that theparts may be adjusted to regulate the depth of digging and also theheight to which the devices-may be raised-for trans- When it is desired to operate the breaking devices, fluid is admitted inthe" forward end of the cylinder so as to drive the piston to the rear endv thereof and hold the parts in the position shown in full lines in Fig. l, thewvalve 23 being allowed to remain in position to maintain the cylinder 14in constant communication with the boiler or tank 25,

as the case may be. To raise the breakers to the position shown in dotted lines in Fig. l. fluid is admitted to the rear end of cylin der 14.

By this construction effective means are provided for applying pressure to the breakingdeviccs and'for raising them to inoperative position. This fluid operated pressure device also permits the breaking devices and the machine to which they are attached to rise and fall independently of each other to compensate for irregularities the ground over which they are traveling; this movement, of course, being against the pres.- sure ofthe fluid in the cylinder, which, on account of being in constant communication with the supply, will be substantially uni:

form.

From the foregoing it will' be apparent that the ground breaking mechanism may be readily attached to the machine, since it is only necessary to bolt the brackets 6 to the draw bar 26 and drill holes in the tank 1 for securing the cylinder 1d and bracket 18. The arrangement of the drag-bar 9 produces a direct drag on the back of the machine and any up and down movements of the channelbars 4 will result in oscillation about the axis of shaft 8, and acushioning movement of the piston. in cylinder 1%, thereby relieving the machine of much 'jolting and vibration. On accountof the up and down movement of the channel-bars 4 being about the 'aXis of the shaft 8 and because of the charactor of the connection between the arm 11 and the piston'rod 13, the pressure on the piston will result in a substantially uniform force being exerted on the spikes to force them into the ground, irrespective. of the depth at which they are working.

Having thus described my invention, ll claim:-- I

1. In combinationwith a self-propelling chine, rearwardly extending drag-bars car ried by said shaft, ground breaking spikes carried by said drag-bars and downwardly and forwardly inclined relative thereto, an upwardly projecting arm rigid with said drag-bars and having its upper end so arranged as to swing substantially horizontally, and cushioning means mounted. on said machine, independently of the means for at taching said shaft to-the machine, and operatively connected with said arm 2,111 combination with-a self-propelling road machine, a pair of bearing brackets sccured on the rear thereof, a horizontal shaft rotatably mounted in said brackets, dragbars carried by said shaft, forwardly ainl downwardly inclined ground breaking spikes carried by said'drag bars at the rearward ends thereof, an arm rigid with said drag bars and projectingupwardly from said shaft, and combined positioning and bush ioning means mounted on the machine, independently of said brackets, and operatively connected with the upper end of said arm whereby said spikes may be forced into the ground by a substantially horizontal force applied to said arm, the bars being so arranged that the vertical reaction of the ground on said spikes is opposed by the weight of said machine, exerted through said brackets.

3. In combination with a' self-propelling road machine having front and rear wheels and also having a draw-bar secured to the rear thereof, of a ground breaking device pivotally mounted on said drawbar and including an upwardly projecting arm and forwardly and downwardly inclined spikes, said device being rigid against all movement except rocking on its pivotal mounting, cushioning means mounted on said machine, above and independently of said draw bar, for the purpose of forcing and holding said spikes'into the ground and also cushioning of upward movements of said spikes, and unyielding connections between said arm and said cushioning means arranged to transmit forces from one to the other in substantially uniform ratio, for diilereut operating positions of the parts, said cushioning means and connections permitting said machine to freely rise and fall relatively to said ground breaking device,

4. In combination. with a self-propelling road machine having front and rear wheels and also having a drawrbar secured on the rear thereof, of a ground breaking device pivotally mounted on said draw-bar and rigid against all movement except rocking on its pivotai mounting, said ground breakingdevice including forwardly and downwardly inclined digging spikes, cushioning means n'iounted on said machine, indcpe ently of said di'aw-har, forthe purpose forcing and-holding said spikes into n; 1

ma ma 8 ground and also cushioning all upwarci In testimony whereof, I have hereunto set moigment of said spikes, and adjustable unmy hand this 2nd day of June 1914.

yie ing connections between said cushioning means and said ground breaking device DAVID ERTER' 5 adapted to transmit force in a substantially Witnesses:

uniform ratio for different positions of the CHAS. I. WELQH,

parts. V e -ESTHER E. PFEIFER.