Decorative curbing machine
First Claim
1. An improvement in a manually maneuverable extruder-propelled apparatus for forming and extruding continuous elongated decorative curbing, edging and borders from cementitious materials, said apparatus including:
- an auger mounted on an auger shaft supported and rotatively driven at a first end to compress and extrude said cementitious materials axially toward an unsupported second end thereof;
an auger housing surrounding said auger, having an inner surface proximate the outer diameter of said auger by which said material is directed to said second end thereof by said auger, and having said second end adapted for attachment to a mold for extrusion therefrom of said cementitious materials, said auger housing having the opposite, first end thereof closed, and having a feed aperture in said auger tube between said first and second ends for introducing said cementitious materials into said auger tube;
a hopper having an open upper inlet end and an open lower outlet end communicating with said feed aperture;
a mold attachable to said first end of said auger tube, and having a cross section to form and extrude said cementitious materials in a desired curbing shape;
a hydraulic power mechanism for driving said auger within said auger tube at a desired controllable speed, said hydraulic power mechanism including;
a. a hydraulic pump to pressurize hydraulic fluid,b. a hydraulic motor to accept said pressurized fluid to drive said auger shaft,c. speed control means to control the pressure of fluid to said hydraulic motor,d. means to completely open or close the flow of said fluid to said hydraulic motor, ande. conduit means for carrying said fluid from said hydraulic pump to said hydraulic motor, and returning said fluid from said hydraulic motor to said hydraulic pump;
motive means to drive said hydraulic pump to pressurize said hydraulic fluid for driving said auger;
a wheeled carriage having a cross-bar transversely slidable relative said auger housing for supporting the forward end of said curb forming apparatus, and having steerable, vertically adjustable wheels attached to each end of said cross-bar;
wherein the improvement comprises means for controlling said flow of said pressurized hydraulic fluid to either side of said hydraulic motor for controllably operating said motor in either the forward or backward direction.
1 Assignment
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Accused Products
Abstract
An apparatus for continuously shaping and extruding concrete or other moldable material as a decorative curbing. The apparatus is operable by one person at high extrusion velocity, negotiates short radius serpentine curbing paths, and is maneuverable in tight spaces because of side-to-side and vertical adjustment features, and a short "wheel base". Moldable material is placed in a hopper and flows into an auger which compresses, mixes and extrudes the material through a shaped, non-flanged mold into the desired curb bed. A fueled engine or electric motor drives a hydraulic pump to pressurize hydraulic fluid. The pressurized fluid drives a hydraulic motor which turns the auger. The speed is controlled by simply setting a fluid flow valve.
57 Citations
13 Claims
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1. An improvement in a manually maneuverable extruder-propelled apparatus for forming and extruding continuous elongated decorative curbing, edging and borders from cementitious materials, said apparatus including:
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an auger mounted on an auger shaft supported and rotatively driven at a first end to compress and extrude said cementitious materials axially toward an unsupported second end thereof; an auger housing surrounding said auger, having an inner surface proximate the outer diameter of said auger by which said material is directed to said second end thereof by said auger, and having said second end adapted for attachment to a mold for extrusion therefrom of said cementitious materials, said auger housing having the opposite, first end thereof closed, and having a feed aperture in said auger tube between said first and second ends for introducing said cementitious materials into said auger tube; a hopper having an open upper inlet end and an open lower outlet end communicating with said feed aperture; a mold attachable to said first end of said auger tube, and having a cross section to form and extrude said cementitious materials in a desired curbing shape; a hydraulic power mechanism for driving said auger within said auger tube at a desired controllable speed, said hydraulic power mechanism including; a. a hydraulic pump to pressurize hydraulic fluid, b. a hydraulic motor to accept said pressurized fluid to drive said auger shaft, c. speed control means to control the pressure of fluid to said hydraulic motor, d. means to completely open or close the flow of said fluid to said hydraulic motor, and e. conduit means for carrying said fluid from said hydraulic pump to said hydraulic motor, and returning said fluid from said hydraulic motor to said hydraulic pump; motive means to drive said hydraulic pump to pressurize said hydraulic fluid for driving said auger; a wheeled carriage having a cross-bar transversely slidable relative said auger housing for supporting the forward end of said curb forming apparatus, and having steerable, vertically adjustable wheels attached to each end of said cross-bar; wherein the improvement comprises means for controlling said flow of said pressurized hydraulic fluid to either side of said hydraulic motor for controllably operating said motor in either the forward or backward direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification