US1825222A - Mechanical spader - Google Patents

Description

Sept. 29, 1931. T. R. CURRY MECHANICAL SPADER Filed June 28,' 1930 2 Sheets-Sheet l T. R. CURRY Sept. 29, 1931.

MECHANICAL SPADER Filed June. 28, 1930 2 Sheets-Sheet 2 I 7am-MM www @wy-T' Patented Sept. 29, 1931 UNITED .STATES PATENT OFFICE TAYLOR R. CURRY, OF PBOPHETSTOWN, ILLINOIS, ASSIGNOR 0F ONE-HALF TO DORA R.

' CURBY, OF PROPHETSTOWN, ILLINOIS MECHANICAL sPADER ApplicationI led .Tune 28, 1930. Serial No. 464,610.

construction, I have personallyv observed that in road making such manual spading is not only laborious and expensive, but is frequently unreliable and is usually a source of much eXtra expense incident to the resulting necessity of repairing uneven edge cientlfy surfaces, air pockets and honeycomb faces along the edges of a -concrete road after the forms are removed. Such patchingis more or lessunsightly and a source of weakness and is to be avoided as much as possible.

The present usual system is'to have a man on each side of the pavement with a No. 2

shovel spading next to the form with an up and down motion. Often they will miss a space completely, being unable to see the result of their Work, thus leavingA a honey-V comb or air Apocket as above mentioned.

Improper workmanship will produce theA same results. Such conditions require `the services of a man to go back after the forms have been removed to repair or patch the concrete. j j

The ideaof this invention is to spade or trowel the sides of the lroad in a more perfect manner and automatically and by power means, thereby saving the services of the three men formerly required for spading and repair work.

The main objects are to provide an auto-V matic mechanical method adapted for accomplishing the spading requirements etliand economically; to provide means there or adapted for power operation and subject to manual control; to provide attachments on the sides of a concrete spreading machine adapted to spade or tamp the concrete along the inner side of the edge form shortly in advance of the spreader machine; tol provide for automatic lifting of the spader or riding thereof over resistant objects in the concrete; to provide for manual raising and setting of the spader in elevated position when the spader is4 desired to be out of service; and to'provide a rotary disk spader of such form and design as to best effect the desired result, namely, the removal of the coarser blocks of stone away from the form, and the replacement thereof by the smaller particles'and by neat cement or grout. Y

VThis invention is illustrated by the accompanying drawings, in which:

Fig. l is mainly a Side view of the front part of the concrete spreader or finisher machine and the right hand spader mounted thereon, the corresponding wheel of the spreader and the hub of the spader disk contactingwith and riding upon the top edge of the concrete road edge form or mold, and the spreader plate being omitted.

Fig. 2 isa plan of a right forward end of a concrete spreader and the corresponding spader mounted thereon.

Fig. 3 is a vertical cross-section through he spader substantially on the line 3-3 of Fig. 4 is a cross-section on the line 4 4 of Fig. l, with the spreader plate in place.

.Fig 5 is a plan of a modilied form of spadermounting frame with the spader disk shown in horizontal axial section.

Fig. 6 is a side-view of a modified form of spader mounted substantially as in Fig. 1, except that it is non-rotary.

Fig. 7 is a section on the line 7-7 of Fig. 6.

Referring to the drawings, Figures l to 4, the device here shown comprises la usual form of concrete spreader and finisher il comprisinga frame l mounted on flanged Wheels 2 for riding forwardly upon the curb molds or edge forms 3, in combination with a pair of forwardly disposed spaders 4 mounted one on each side of the machine at its forward corners.

Each discoidal spader 4 is carried by a vertically adjustable forwardly projecting frame or bracket comprising a rigid strut 5 in combination with a lifting lever (i having control toggle means including lever 7 and link 8. Said link 8 is pivoted to a. perforated block 9 which rides upon the lever 6 centrally of the latter and bears against a helical spring 10 concentric with lever 6. Said spring bears at its opposite end against a perforated block 11 which is pivoted at 12 on bracket 13. Said bracket 13 is fixed on frame 1, and said rod G is slidable through block 11. The projecting` rearward end 14 of lever 6 serves as a handle for raising and lowering the disk 4.

The rearward end of bracket 5 is pivotally connected at 15 to frame 1 to accommodate tilting for raising and lowering the spader. A transverse shaft 16 is mounted on the for Yard end of strut 5 between its arms 5 for supporting disk 4 rotatably, together with the roller or hub lnember 17, which rides upon the form 3. wThe middle part of disk 4 is urged against one end of hub roller 17 by means of a helical compression spring 20. The roller 17 has a iange 22 on its outer end. In using the spader the flange 22 rides along against the outer side of the form 3 and disk 4 against the inner side, and as will be apparent from Fig. 3. The disc 4 is concave toward the form 3 and convex toward the concrete 25. Said disk is minierously perforated as at 26.

The liftingr lever 6 is pivoted at 28 to bracket 5 and handle lever 7 is pivoted at 29 to the lever G. Pivot 30 serves to connect the toggle joint members 7 and 8 medially of lever 7.

In using the machine above described, the spaders 4 are lowered into place. The con- .crete is spread roughly in place ahead of the machine and the spader-s travelling on the edge forms 3 work it into place uniformly against the molds. Finally the finisher plate 33 smooths the entire surface ready for setting. As the spader advances it works the coarser material away from the form and lets finer material take its place. If an irresistable obstruction is met the disk 4 rides over it. rllhe toggles 7-8 and spring 10 acting in compression tend .normally to urge the spader downward.

Whenever desired the spader may be raised manually by lifting lever 7 and so releasing toggles 7 8 and then depressing the handle 14. rIlhen when the spader is raised and the lever 7 is thrown fully forward it locks the toggle reversely and the tension of the spring 10 holds the spader and bracket 5 up.

Referring to the modified forni of spader control means shown at on Fig. 5, the lifting lever 41 is forked at 42 and the control toffe'le and spring means of Fig. 1 are omitted? Here the disk 4 is mounted subl practical shape or design.

stantially as in Fig. 3 and operates in substantially the same way.

Referring to Figs. 6 and 7 the spader member differs somewhat from spader 4 in that it is non-rotatable. It is here shown as octagonal, but it may be of any desired It is carried on a control bracket 52 substantially similar to those above described.

Although this invention is variously illustrated, it is to be understood that some of the details set forth may be altered or omitted without departing from the spirit of the invention as defined by the following claims.

I claim:

1. A mechanical spader comprising a perforated blade, a bearing part secured thereto for riding on the edge of the form, and a strut for pushing the spader forwardly along the form in spading relation to the concrete.

2. An edge spader for concrete roads comprising a numerously perforated concave disk having a bearing hub to ride upon the top edge of trie concrete edge form, said hub being on the concave side of the disk, and means to propel the disk forwardly in spading relation to the concrete.

A mechanical spider attachment for a concrete road making machine, said attachment comprising a tiltable frame pivotally attached to the front edge of said machine and a rotary outwardly concave perforated disk mounted on the front end of said frame and having a. hub member to ride upon the edge form or mold.

4. A device of the class described comprising a tiltable strut pivotally supported at one end and carrying a spader at its opposite end, in combination with an inclined lifting arm, one en(L of which is also pivotally mounted and slidable, and the other being pivoted to the middle part of said strut, and combined spring and toggle leverage means adjustable to urge the'spider downward and releasable to permit raising of the spader.

5. In a device of the class described, a spader comprising a concave perforated disk, a shaft on which said disk is concentrically mounted, a roller member also concentrically mounted on said shaft, and yielding means mounted on said shaft and arranged to urge said disk endwise of the shaft against said roller member.

6. The method of spading concrete next to a form which consists in rolling a perforated concave disk forwardly with the concave side of the disk toward the form.

Signed at Prophetstown this 25th day of June, 1930.

TAYLOR R. CURRY.

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