US3073219A

US3073219A - Material compacting device

Info

Publication number: US3073219A
Application number: US815734A
Authority: US
Inventors: Harold G Miller
Original assignee: RACINE HYDRAULICS AND MACHINERY Inc
Current assignee: RACINE HYDRAULICS AND MACHINERY Inc
Priority date: 1959-05-25
Filing date: 1959-05-25
Publication date: 1963-01-15
Anticipated expiration: 1980-01-15

Description

Jan. 15, 1963 H. G. MILLER 3,073,219

MATERIAL COMPACTING DEVICE Filed May 25, 1959 2 Sheets-Sheet 1 lilm Ii I INVENTOR. Z a/204i J BY I 6 I y {m Jan. 15, 1963 H. G. MILLER MATERIAL COMPACTING DEVICE 2 Sheets-Sheet 2 Filed May 25, 1959 3,073,219 Patented Jan. 15, 1963 3,073,219 MATERIAL COMPACTING DEVICE Harold G. Miller, Racine, Wis., assignor to Racine Hydraulics and Machinery, Inc., a corporation of Wisconsin Filed May 25, 1959, Ser. No. 815,734 8 Claims. (Cl. 94-43) This invention relates to a material compacting device and more particularly to a self-contained portable compactor.

An object of this invention is to provide a new and improved self-contained portable compactor having a simple sturdy design with a minimum number of moving parts and which may be walked along while supported by an operator with minimum vibration effects on the operator.

Another object of the invention is to provide a selfcontained portable compactor having a frame for supporting a motor mounted at one end thereof and an elongated frame section having a hollow interior extending the length thereof with an open end, a driven piston of the same cross section as said hollow interior slidably and non-rotatably guided by the frame with an extension extending through said open frame and adapted to support a compacting tool, a drive piston of the same cross section as said hollow interior of the frame slidably and non-rotatably guided by the frame, means driven by the motor for reciprocating said drive piston along a part of the length of said frame section, opposed elongated slots in the wall of said flame section along a substantial part of the length thereof, a pair of oppositely extending ears on each of said pistons extending through and beyond said slots, and a plurality of springs extending from both sides of said driven piston ears and carried by the drive piston ears to resiliently transmit reciprocating movement of the drive piston in both directions to said driven piston whereby the compacting tool is given reciprocating movements.

Other and further objects and advantages of the invention will be readily apparent from the following description and drawings in which:

FIG. 1 is a side elevational view of the compactor;

FIG. 2 is an end elevational view of the compactor;

FIG. 3 is a vertical section on an enlarged scale taken generally along the line 33 in FIG. 2 and with parts broken away;

FIG. 4 is a vertical section taken generally along the line 4-4 in FIG. 3;

FIG. 5 is a horizontal section taken generally along the line 5-5 in FIG. 3; and

FIG. 6 is a horizontal section taken generally along the line 6-6 in FIG. 3.

While this invention is susceptible of embodiments in many different forms, there is shown in the drawings and will herein be described in detail one specific embodiment with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the embodiment illustrated. The scope of the invention will be pointed out in the appended claims.

The self-contained portable compactor shown generally in FIGS. 1 and 2, has a frame, indicated generally at 10, with an elongated frame section 11 slidably mounting a driven piston 12 carrying a compacting shoe 13. The driven piston 12 is resiliently reciprocated at a high rate of speed by means hereinafter described with power being provided by a motor, indicated generally at 14, which is mounted on the frame It). A compactor has handle bars 15 attached to the frame thereof, as indicated at 16, whereby an operator may hold the device during operation thereof.

The compactor frame 10 has an interior chamber 20 at an end thereof and the motor 14 is mounted to the frame adjacent said chamber by an adaptor plate 21 which fits against a casing 22 of the motor and is secured thereto by machine screws 23. The motor adaptor plate 21 is also shaped to interfit with the frame and the adaptor plate is secured to the frame by cap screws 24 extending through the frame 10 and into the adaptor plate 21. A motor output shaft 25 extends into the frame chamber 21 and connects to a centrifugal clutch 26 with the clutch connected to a drive shaft 27 spanning the chamber and rotatably mounted in

bearings

28 and 29. The drive shaft has a pinion gear 30 engaged with a bull gear 31 on a crank shaft having spaced apart sections 32 and 33 rotatable in the frame. The crank shaft sections 32 and 33

carry cranks

34 and 35 respectively spaced from each other with a crank pin extending therebetween on which a connecting rod 36 is mounted. Back and forth movements of the connecting rod 36 are transmitted to the driven piston 12 by mechanism hereinafter described.

The elongated frame section 11 is composed of two generally

U-shaped frame members

40 and 41 each formed integrally with

frame parts

42 and 43, respectively, which form the interior chamber 20. The frame 16 is connected together along its length by the

bolts

44, 45, 46, 47 and 48 with the bolts '45, 46, 47 and 48 passing through the abutting parts of the

frame members

40 and 41. With the

frame members

40 and 41 joined together the frame section 11 has a hollow interior of the shape shown in FIGS. 5 and 6 and which extends into communication with the interior chamber 20 housing the gearing. Each of the

frame members

40 and 41 is formed with spaced apart

legs

50, 51 and 52, 53, respecwith the legs of one frame member extending toward the other but spaced therefrom. This relationship exists for the major part of the length of the elongated frame section 11, except for where the

frame members

40 and 41 abut each other to in effect form a pair of opposed

elongated slots

68 and 69 substantially along the entire length of the elongated frame section 11.

The driven piston 12 has generally the same cross sectional shape as the interior of the frame section 11 as noted in FIG. 6 and thus is non-rotatably mounted. The drive piston 12 extends outwardly through an open end 55 of the frame section 11 to support the tool 13.

A drive piston is mounted slidably within the frame section 1 1 and has the same cross sectional shape as the interior thereof whereby the multi-sided wall of the frame section holds the drive piston non-rotatably therewithin. The drive piston 60 is connected to the connecting rod 36 at its upper end by a pin 61 whereby the back and forth movements of the connecting rod are transmitted to the drive piston 60.

Means are provided for resiliently transmitting the reciprocating movement of the drive piston 60 to the driven piston 12 and the compacting tool 13 comprising four sets of

nested coil springs

62, 63, 64 and 65.

The

sets

62 and 63 of springs are mounted by placement between ears formed on the drive piston 60 and the driven piston 12. More particularly, the drive piston 60 has a pair of laterally and oppositely extending

ears

66 and 67 which extend outwardly from the interior of the frame section 11 through the pair of

opposed slots

68 and 6? formed by the frame construction previously described. The driven piston 12 has a similar pair of

cars

70 and 71 which align with the

drive piston ears

66 and 67, respectively. The underside of the

drive piston cars

66 and 67 are flanged, as indicated at 72 and 73, to

thereby confine the upper ends of the

spring sets

62 and 63, each set having three concentric springs disposed one within the other. The driven

piston cars

70 and 71 are each apertured as shown at 75 and 76 and receive

flanged collars

77 and 78, respectively, which confine the lower ends of the

spring sets

62 and 63. The spring sets 62 and 63 thus resiliently transmit force to the driven piston 12 resulting from downward movement of the drive piston 60.

The driven piston 12 is caused to resiliently follow the upward movement of the drive piston 66 by the

spring sets

64 and 65. The

spring sets

64 and 65 each comprise a pair of springs positioned one within the other and the upper ends thereof are confined by downwardly facing flanged collars 7 and 80 positioned at the underside of the driven

piston ears

70 and 71. The lower ends of the springs in

sets

64 and 65 are confined by a pair of

flanged collars

81 and 52 respectively which are apertured to receive

rods

83 and 84 which extend through the interior of the spring sets with the rod 83 passing through the aperture 75 in the driven piston ear 7t? and threaded in an aperture 85 in the drive piston car 66. The rod 34 passes through the aperture 76 in the driven piston ear 71 and is threaded in an aperture 86 in the drive piston car 67. The

rods

83 and 84 each have a nut 87 at the ends thereof to hold the rods in assembled relation with the drive piston 69 and the

collars

81 and 82 for the lower ends of the

spring sets

64 and 65. The

collars

77, 78, 79 and 80 mounted on the driven piston ears all have plugs that fit into the ear apertures 75 and 76 to be confined against movement.

With the foregoing spring sets the compacting tool 13 is caused to resiliently compact material engaged thereby.

I claim:

1. A material compacting device comprising, a hollow frame having an internal chamber at one end thereof and an elongated rigid hollow section extending from the chamber with an opening in an end thereof remote from the chamber, means defining opposed elongated slots in the wall of said hollow section extending for substantially the entire length 'of said elongated section, a drive piston slidably guided within said elongated frame section with a pair of oppositely extending ears extending through said elongated slots, means extending from said chamber to said drive piston for reciprocating said piston, a driven tool carrying piston slidably guided in said elongated frame section between the drive piston and said frame opening with a pair of oppositely extending ears extending through said elongated slots, a first group of springs retained and extending between aligned ears of said drive and driven pistons for transmitting force from the drive piston to the driven piston, a pair of spring collars spaced from and at the sides of the driven piston ears opposite from the drive piston ears, means connecting said collars to the drive piston, and a second'group of springs retained and extending between the collars and driven piston. ears for opposing movement of the latter ears and collars toward each other.

2. A material compacting device comprising, a hollow frame having an internal chamber generally at one end thereof and an elongated rigid hollow section extending from the chamber with an opening in an end thereof remote from. the chamber, means defining opposed elon- V gated slots in the wall of said hollow section extending for substantially the entire length of said elongated section, a drive piston slidably guided within said elongated frame section with a pair of oppositely extending flanged ears extendingthrough said elongated slots, means extending from said chamber to said drive piston for reciprocating said piston, a driven tool carrying piston slidably guided in said elongated frame section between thedrive piston and said opening with a pair of oppositely extending apertured and flanged ears extending through said elongated slots to align with the drive piston ears, a pair of flanged spring collars aligned one with each aligned set of ears at the side of the driven piston cars opposite from the drive piston ears, a pair of rods associated one with each aligned set of ears and removably connecting a drive piston ear and a collar, two sets of springs with one set extending between each pair of aligned piston ears and confined by the ear flanges for transmitting force from the drive piston to the driven piston, and two additional sets of springs with one set extending between each aligned driven piston ear and collar and confined by the flanges thereon to resiliently maintain the spacing between the driven piston ears and collars, each of said rods being secured to a drive piston ear and passing through two of said sets of springs and movably extending through the driven piston ear aperture.

3. A self-contained portable compactor having a frame with an interior chamber at an end thereof, a motor mounted on the frame with a drive shaft extending into said chamber, an elongated frame section extending from the chamber area having a hollow interior extending the length thereof between said chamber and an open end of the frame, a driven member of the same cross section as said hollow interior slidably and non-rotatably guided by the frame with an extension extending through said open end adapted to support a compacting tool, a drive member of the same cross section as said hollow interior located between the driven member and said chamber and slidably and non-rotatably guided by the frame, means connected between the drive shaft and drive member for reciprocating said drive member along a part of the length of said frame section, opposed elongated slots in the wall of said frame section extending along a substantial part of said frame section length, a pair of oppositely extending ears on each of said members extending through and beyond said slots, and a plurality of springs extend: ing from both sides of said driven member ears with upper springs between the drive and driven piston ears and lower springs at the other side of the driven piston ears, and means movable with the drive pistonv for bolding the lower springs in place.

4. A self-contained portable compactor as defined in claim 3 in which said elongated frame section consists of a pair of joined generally U-shaped frame members with the legs of the U-shaped members directed toward each other to form the hollow interior for the frame section with said elongated slots being formed by spaces between said egs.

5. A material compacting device comprising, an elongated hollow frame with an opening in an end thereof, means defining opposed elongated slots in the wall of said hollow frame extending for substantially the entire length thereof, a drive piston slidably guided within said frame with a pair of oppositely extending flanged ears extending through said elongated slots, a driven tool carrying piston slidably guided in said elongated frame between the drive piston and said opening with a pair of oppositely extending apertured and flanged ears extending through said elongated slots, a pair of flanged spring collars aligned one with each aligned set of ears at the side of the driven piston ears opposite from the drive piston ears, two sets of nested springs with one set extending between each pair of aligned piston ears and confined by the ear flanges for transmitting force to the driven piston, and two additional sets of springs with one set extending between each aligned driven piston ear and collar and confined by the flanges to resiliently oppose movement of the driven piston relative to the drive piston, and a pair of rods associated one with each aligned set of cars, each rod being connected to a driven piston ear and a collar and movably extending through sets of springs and a driven piston ear.

6. A compacting device as defined in claim 5 in which the frame has an interior chamber at the other end thereof, a motor adjacent the chamber with a drive output shaft extending into said chamber, means mounting the motor on the frame including an adaptor plate shaped to interfit with the frame, fastening means attaching the motor casing to said plate, and means passing through the frame and attached to the plate for connecting the plate and motor to the frame.

7. A material compacting device comprising, in combination, a casing having a pair of spaced apart elongate openings, a drive plunger movably guided within the easing, a driven tool carrying plunger also movably guided in said casing and in spaced relation with said drive plunger, said drive and driven plungers each having a pair of ears extending oppositely from each other through the casing openings to locations externally of the casing, first spring means extended between a drive plunger ear and a driven plunger ear at one side of the casing, second spring means extended between a drive plunger ear and a driven plunger ear at a side of the casing opposite from said first spring means, resilient means engaging the driven plunger ears at the side thereof remote from the drive plunger opposing movement of the driven plunger away from the drive plunger, and means carried by the drive plunger to hold said resilient means in place.

8. A self-contained portable Compactor having a frame with an interior chamber and an elongate frame section extending from the chamber area having a hollow interior extending the length thereof between said chamber and an open end of the frame, a driven member in said hollow interior movably guided by the frame with an extension extending through said open end adapted to support a compacting tool, a drive member in said hollow interior located between the driven member and said chamber and movably guided by the frame, means for reciprocating said drive member along a part of the length of said frame section, opposed elongated openings in the wall of said frame section extending along a substantial part of said frame section length, a pair of oppositely extending ears on each of said members extending through and beyond said openings, and spring means extending from both sides of said driven member ears including springs between the drive and driven member ears and springs at the other side of the driven piston ears, and means carried by the drive member to hold the last mentioned springs in place.

References Cited in the file of this patent UNITED STATES PATENTS 849,506 Shadall Apr. 9, 1907 2,038,416 Clifford Apr. 21, 1936 2,677,355 Maurer May 4, 1954 2,845,050 Wacker July 29, 1958 2,942,589 Wacker June 28, 1960 FOREIGN PATENTS 718,276 Germany Mar. 7, 1942 321,787 Switzerland July 15, 1957 327,195 Switzerland Mar. 15, 1958

Claims

1. A MATERIAL COMPACTING DEVICE COMPRISING, A HOLLOW FRAME HAVING AN INTERNAL CHAMBER AT ONE END THEREOF AND AN ELONGATED RIGID HOLLOW SECTION EXTENDING FROM THE CHAMBER WITH AN OPENING IN AN END THEREOF REMOTE FROM THE CHAMBER, MEANS DEFINING OPPOSED ELONGATED SLOTS FROM THE CHAMBER, MEANS DEFINING OPPOSED ELONGATED SLOTS IN THE WALL OF SAID HOLLOW SECTION EXTENDING FOR SUBSTANTIALLY THE ENTIRE LENGTH OF SAID ELONGATED SECTION, A DRIVE PISTON SLIDABLY GUIDED WITHIN SAID ELONGATED FRAME SECTION WITH A PAIR OF OPPOSITELY EXTENDING EARS EXTENDING THROUGH SAID ELONGATED SLOTS, MEANS EXTENDING FROM SAID CHAMBER TO SAID DRIVE PISTON FOR RECIPROCATING SAID PISTON, A DRIVEN TOOL CARRYING PISTON SLIDABLY GUIDED IN SAID ELONGATED FRAME SECTION BETWEEN THE DRIVE PISTON AND SAID FRAME OPENING WITH A PAIR OF OPPOSITELY EXTENDING EARS EXTENDING THROUGH SAID ELONGATED SLOTS, A FIRST GROUP OF SPRINGS RETAINED AND EXTENDING BETWEEN ALIGNED EARS OF SAID DRIVE AND DRIVEN PISTONS FOR TRANSMITTING FORCE FROM THE DRIVE PISTON TO THE DRIVEN PISTON, A PAIR OF SPRING COLLARS SPACED FROM AND AT THE SIDES OF THE DRIVEN PISTON EARS OPPOSITE FROM THE DRIVE PISTON EARS, MEANS CONNECTING SAID COLLARS TO THE DRIVE PISTON, AND A SECOND GROUP OF SPRINGS RETAINED AND EXTENDING BETWEEN THE COLLARS AND DRIVEN PISTON EARS FOR OPPOSING MOVEMENT OF THE LATTER EARS AND COLLARS TOWARD EACH OTHER.