US2732197A

US2732197A - cornett

Info

Publication number: US2732197A
Authority: US
Publication date: 1956-01-24
Anticipated expiration: 1973-01-24

Description

Jan. 24, 1956 w. v. coRNETT 2,732,197

PORTABLE POWER HAMMERS Filed June 26, 1952 3 Sheets-Sheet l WALTER CORNETT BY ATTORNEYS Jan. 24, 1956 w. v. coRNETT 2,732,197

PORTABLE POWER HAMMERS Filed June 26, 1952 3 Sheets-Sheet 2 JNVENToR.

WALTER V. CORNETT ATTORNEYS Jan. 24, 1956 w. v. CORNETT 2,732,197

PORTABLE POWER HAMMERS Filed June 26, 1952 3 Sheets-Sheet 3 TJE C INVENToR.

WALTER V. CORNETT BYMM ATTORNEYS `of theA inventionV are disclosed.' however, that these are illustrative, not limitative, as many United States Patent() PORTABLE POWER HAMMERS Walter V. Comett, Los ngeles, Calif.

Application June 26, 1952, Serial No. 295,784

6 Claims. (Cl. 262-15) This invention relates to a portable power hammer device having a pneumatic tool generally usable for demolition work such as breaking concrete, asphalt and other paving, cutting trench in any pavement or road and tamping backll, where the device is towed from place to place. Hereinafter where the term a device of the character described is used, it will be understood to refer generally to such a device.

An object of the invention is to provide a device of the character described particularly adapted to what is commonly called deep trenching as distinguished from demolition work on road surfaces or the like. Such deep trenching requires a device in which the hammer tool may be lowered to the bottom of a deep trench-not only to cut the trench but to securely tamp the backll in layers as the trench is filled. The work surface therefore may be either the road surface on which the wheels of the device are supported, or it may be the surface in a trench below the road surface.

Another object is to provide a device of the character described adapted to straddle a trench or a work surface, the tool or hammer being supported on a carriage that is movable along the framework and transverse the work surface.

Another object is to provide a device of the character described `wherein motors are provided for moving the carriage supporting the tool and for moving the tool vertically to adjust the latter to operate in trenches of various depths.

Another object is to provide a device of the character described which may be provided with sets of wheels at each end of the platform, at least some of these wheels being swivelled to permit turning them on a vertical axis so that their axis of revolution is transverse the longitudinal axis of the platform to permit the latter to lie across a trench and the platform moved Athereover in a path parallel to the trench.

Another object is to provide a device of the character described wherein the device can be coupled to a truck or other vehicle and towed thereby while projecting at an angle to the path of travel of the truck.

A further object is to provide controls for the various pieces of apparatus comprising the device, that are all within easy reach of anv operator seated upon the movable carriage carrying the tool.

Other objects and advantages will be apparent from a perusal of the following specification andA drawings where-by way of illustration-preferred embodiments It will be understood,

changes can be made without departing from the spirit of the invention as defined in the appended claims.

In the accompanying drawings: Figure l is a side view of the device constituting this invention, having its front end supported on a truck; Figure 2 is a plan view of the device, Figure 1; Figure 3 is an end view partly in section of the rear wheels of the device, Figure 1;

Figure 4 is a top view, partly in section, of the cylinder head of the tool used in the device, Figure 1;

Figure 5 is a plan view of an alternate wheel arrangement for the device, Figure 1; and

Figure 6 is an end view of the front wheel unit used in the device, Figure 5.

Referring to Figures 1 and 2, a platform'generally denoted by the numeral 10 is constructed in any suitable manner to form an open framework. This may have the side members 11, 12, united at their ends in any suitable manner as by plates or cross members 13, 14, to form a frame-like structure open as shown at 15.

Mounted upon the platform 10 is a carriage 16 constructed in any suitable manner, and the same constitutes a second frame-like structure and is supported on the platform by rollers along its sides; two of said rollers are shown at 17, 18, and these may run on the upper surfaces 19, 2), of the I-beam side members 11, 12, of frame work 10.

The carriage has depending from the side members thereof on each side, the downwardly depending arms, one of which is shown at 21 which carry at their lower ends rollers 22 which extend under the at

surfaces

23, 24, of the I-beams or rails 11, 12, and serve to hold the carriage down on the rails during operation.

Rollers 25, 26, are provided attached to theside members of the carriage 16 and bear against the

outer edges

27, 28, of the rails to prevent lateral displacement of the carriage thereon.

It will be noted that carriage 16 may now ride on rails 11, 12, longitudinally of the platform 10.

A suitable motor 29 (for example, anV air motor) is connected to a winding drum 30 about which `is`wound a cable 31 the ends of which are secured to the ends 13, 14, of the platform. When motor 29 is operated, it will pull carriage 16 toward the front end 13 of the platform, and if the motor is reversed by using control handle 32 the carriage will be moved to the rear end 14 of the platform and by proper manipulation of the control 32 the carriage and tool carried thereby may be made to assume any position intermediate the ends of the platform 10.

Secured to the carriage 16 are a pair of trunnion blocks, one of Which is shown at 33, the other is on the opposite side of the carriage. Supported to turn freely in these blocks are the trunnion shafts V34, 35, securedV to these shafts and extending upwardly therefrom are the guide members 36, 37, and secured to the guides are

latches

38, 39, which by means of control handle may be brought into engagement with slots 41 in guide rods v Secured to guide rods 42, 43, is a suitable hammer mechanism having a cylinder 44 having an upper head 45. In the center of this head is a boss 46 to which a cable 47 is attached and which extends to a winding drum 43 connected to a suitable air motor 49. This has a control 50 by which the motor can be started, stopped and reversed. A second control or let-off is provided for releasing cable 47 if desired.

The cylinder 44 contains the usual piston, and depend- I ing therefrom is piston rod 52 which carries a suitable tool 53 depending upon the type of work to be done. The tool 53 shown is suitable for tarnping backll in trench 54.

lt will be seen that by operating motor 49 that the entire hammer tool assembly and its guide rods 42, 43, may be raised and lowered, thereby permitting the tool 53 to be lowered into trench S4 to tamp backlill in layers as desired, and to vary the stroke of the hammer. The hammer assembly can be locked in any adjusted position by the locking means described in connection with Figure 4. For further details of the hammer assembly per se, and particularly the above described locking mechanism, ref- 3 eren'ce is made lto my co-pending applications Serial No. 33,603, filed June 17, 1948, now Patent Number 2,672,- 331 and Serial No. 104,569 filed July 13, 1949, now abandoned.

During transportation, it is desirable to lower the hammer assembly, which is accomplished by disconnecting stay rod 55 yat 56, and swinging the hammer unit about trunnions 33, 34, and locking rod 55 at 57.. This lowers the .hammer unit to the position shown in broken lines at 58. The tool 53 may be held in idle position by chain '59.

A seat 60 is mounted on carriage 16 in such a position that an operator seated thereon can manipulate control 32 for the carriage motor controls 50, 51, for the hammer lift, locking control '50, and the air valve control 61 for reciprocating the hammer.

A pipe 62 connects to the hammer Vcylinder via valve 61, to the air motor 29 via control 32 and to motor 49 `Via control 50. Pipe 62 may connect to a suitable compressor 63 carried on truck 64, or the compressor may be mounted on carriage 16 or framework 10.

The platform 10 must be supported in such a manner that while positioned transverse the Work surface-for example, trench S4-it can be moved along the trench. This is accomplished by providing the rear end c-f the platform with a plate 65, Figure 3, having a downwardly depending portion to receive swivel pin 66 which rockably mounts the platform on the axle plate 67 secured to axle 68.

Axle 68 carries two wheel forks; as both are alike, only one will be described. Referring to Figure 3, the fork has an upwardly extending shaft 70 which permits the fork carrying wheel 71 to be revolved about the axis of shaft 70, which when properly adjusted is locked to the axle by nut 72 or in any other .suitable manner. The same can be accomplished with the right hand fork 73 and its wheel 74. The wheels are preferably equipped with pneumatic tires.

When being towed from place to place,

wheels

71, 74, are locked in position shown in broken lines, Figure 2. When the device is in operation, the

wheels

71, 74, are locked in the position shown in solid lines at the left, Figure 2, and tie rod 75 extends from axle plate 67 to the bracket 76 on truck 64 so that when the truck goes forward or back, the platform 10 and all parts mounted thereon are moved along and over the work surface in a manner that will be obvious, the front end of the platform 10 being supported on the truck in any suitable manner.

Referring to Figure 1, one way of combining the device with a truck is shown. Here the front end 13 of the platform 10 is provided with a bearing plate 76 provided with a downwardly depending portion 77 holding the pivot pin 78 which .is journalled to turn in the axle support 79 secured to the axle carrying the usual

rear wheels

80, 81. truck 64 and will track after the truck as it is free to turn about the axis of the pin 78.

An alternate method of providing wheels for the device is shown in Figures and 6. Referring to Figure 5, the platform is provided with -swivelling

rear wheels

71, 74, as heretofore described, but the front end thereof is provided with the wheels and axle shown in Figure 6 where 82 denotes an

axle carrying wheels

83, 84, mounted in forks and adjustable in the axle like .the

lwheels

71, 74, of Figure 3. The pin 78, member 77 and plate 76 are the same as previously described.

It will be noted that in this modification (Figures 5 and 6) all wheels are adjustable to permit them to travel in The device can, therefore, be towed by paths transverse the longitudinal axis of the device, or parallel thereto, as shown in dotted lines 85, Figure 5.

When the device, Figure 5, is used, a towing cable 86 may be attached to the device for towing same over thc work surface. When moving the device from place to place, this cable is attached to the lug 87, or said lug may extend outwardly to form a pulling tongue or bar by which the device may be towed from place to place.

Details of the piping connecting the cylinder 44, and control valve 61 therefor, the motor 29 and control valve 32 therefor, motor 49 and control valve S0 therefor, all connected to the air supply 62 are not shown in detail as they are obvious. However, reference is made to the aforesaid co-pending applications for details of the control valve 61 for the air cylinder 44. The air supply pipe 62 connects to motors 29 and 49 via their associated valves 32 and 50 in the usual manner.

What is claimed is:

1. In a truck driven portable power hammer device having a pneumatic tool for impact breaking and tarnping work on roadways .and backiills, a trailer consisting of a pair of spaced parallel longitudinally extending rails, a swiveled hitch connection fixed to one end of said rails, a carriage movably mounted on said rails adaptable for axial adjustment along the length of said trailer, land supporting said pneumatic tool between said rails, an axle supporting the other end of said rails, a road wheel swivelly mounted under each end of said axle adaptable for either normally longitudinally adjustment for transportation from place to place, or transverse alignment normal to the longitudinal axis ofthe trailer for straddling operation over trenches yand roadways to one side of said truck, and a link adaptable for bitching said axle to the side of said truck for such straddling operation.

2. The combination defined in claim 1, and a pneumatic motor and controls therefor on said carriage for said axial movement of said carriage along said rails.

3. The combination defined in claim 2, and means for vertical adjustment of said pneumatic tool on said carriage for varying the level of operation of said tool with respect to the adjacent ground.

4. The combination defined in claim 3, said means including a pneumatic motor and controls therefor on said carriage.

5. The combination defined in claim 4, said pneumatic tool being mounted on transverse horizontal trunnions on said carriage, and a link adaptable for fixing the upper end of said pneumatic tool, in a tilted position, to the front end of said trailer for holding its lower end off the ground during transportation of the trailer from place to place.

6. The combination of claim l, another axle and similar road wheels connected under said swivelled hitch connection, .and having a draw bar adapted for coupling to the rear of said truck.

References Cited in the lfile of this patent UNITED STATES PATENTS 1,130,007 Nagle Mar. 2, 1915 1,140,461 Jennings May 25, 1915 1,180,562 Beggs Apr. 25, 1916 1,541,392 Reaney June 9, 1925 1,830,752 Cornett Nov. 10, 1931 2,162,553 Hirschberg June 13, 1939 2,180,621 Thomason Nov. 21, 1939 2,338,056 Penote Dec. 28, 1943 2,532,164 Hansen et al Nov. 28, 1950 2,603,008 Bennett July 15, 1952