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Allen Engineering Corporation Patents
Assignee:
Allen Engineering Corporation
Address:
Paragould, AR
No. of patents:
48
Patents:












Patent Number Title Of Patent Date Issued
D466909 Riding trowel having edge guards with safety covers December 10, 2002
D344736 Riding trowel for concrete finishing March 1, 1994
D340340 Riding trowel cranking dolly wheel assembly October 12, 1993
D323510 Riding trowel January 28, 1992
7690864 Hydraulic riding trowel with automatic load sensing system April 6, 2010
A high performance, multiple rotor, hydraulically driven riding trowel for finishing concrete includes a rigid trowel frame with two or more downwardly-projecting, bladed rotor assemblies that frictionally engage the concrete surface. The rotor assemblies are tilted with double acting
7316523 Acoustically matched method and apparatus for screeding concrete January 8, 2008
Methods and apparatus for screeding freshly placed concrete in which the acoustic impedance of the treating equipment is made substantially equal to the acoustic impedance of the concrete slab. Portions of the screed contacting the plastic concrete are matched to an acoustic impedance
7114876 Acoustically matched concrete finishing pans October 3, 2006
Pans for power finishing freshly placed concrete in which the acoustic impedance of the treating equipment is made substantially equal to the acoustic impedance of the concrete slab being treated. Preferably, a powered, twin rotor riding trowel is provided with a pair of circular fin
7108449 Method and apparatus for acoustically matched slip form concrete application September 19, 2006
Methods and apparatus for power finishing freshly placed concrete in which the acoustic impedance of the treating equipment is made substantially equal to the acoustic impedance of the concrete slab being treated. Preferably, a powered, twin rotor riding trowel is provided with a pair
6857815 Acoustic impedance matched concrete finishing February 22, 2005
Methods and apparatus for power finishing freshly placed concrete in which the acoustic impedance of the treating equipment is made substantially equal to the acoustic impedance of the concrete slab being treated. Preferably, a powered, twin rotor riding trowel is provided with a pair of
6106193 Hydraulically driven, multiple rotor riding trowel August 22, 2000
High performance, multiple rotor riding trowels for finishing concrete comprise hydraulic circuitry enabling complete joystick control to the operator. The rigid trowel frame mounts separate spaced-apart, downwardly-projecting, bladed rotor assemblies that frictionally engage the con
6053660 Hydraulically controlled twin rotor riding trowel April 25, 2000
A high performance, twin rotor riding trowel for finishing concrete and hydraulic circuitry therefor, enabling complete joystick control to the operator. The rigid trowel frame mounts two spaced-apart, downwardly-projecting, bladed rotor assemblies that frictionally engage the concre
6048130 Hydraulically driven, multiple rotor riding trowel April 11, 2000
A high performance, hydraulically-propelled, multiple rotor riding trowel for finishing concrete is controlled with hydraulic circuitry enabling steering wheel and foot pedal control. The rigid trowel frame preferably mounts three separate spaced-apart, downwardly-projecting, bladed roto
6019545 Surface finishing machine with rotatable guard February 1, 2000
A motorized finishing machine has a rotatable guard system enabling it to finish concrete surfaces next to walls, posts, conduits, or other obstacles. Deployed as a concrete trowel, the machine comprises an internal combustion motor that powers a gearbox to revolve a downwardly proje
6019433 Concrete saw with stabilized carriage and blade control February 1, 2000
A highly stable concrete saw for cutting crack control relief grooves features a stabilized and reinforced carriage. The carriage frame comprises a generally C-shaped, rigid metal weldment having a closed side extending between a closed front and closed rear. The opposite side is par
5988938 Compartmentalized access shroud system for riding trowels November 23, 1999
A powered riding trowel comprises a pair of releasable, protective, quick access hoods that may be unlatched to quickly expose the power means for service without structural disassembly. In a preferred embodiment, the twin hoods are hinged to the frame. The trowel seat is mounted on an u
5967696 Riding trowel with variable ratio transmission October 19, 1999
A powered concrete finishing trowel comprises a variable ratio drive train to power one or more revolving rotors. One or more internal combustion motors power two or more downwardly projecting rotors comprising blades that frictionally contact the concrete surface. The rotors are shaft
5934823 Quick access shroud system for riding trowels August 10, 1999
A powered riding trowel comprises a protective, quick access support shroud that may be unlatched to quickly expose the power means for service without structural disassembly. The trowel seat is mounted on top of the upper planar surface of the shroud. The shroud front and rear are p
5890833 Hydraulically controlled riding trowel April 6, 1999
A high performance, multiple rotor riding trowel for finishing concrete and hydraulic controls therefor, enabling complete hand control to the operator of steering, propulsion, and blade pitch. A rigid trowel frame mounts two or more downwardly-projecting, bladed rotor assemblies that
5685667 High performance contra-rotating riding trowel November 11, 1997
A high power, contra-rotating, twin engine riding trowel for finishing concrete comprises twin, downwardly projecting rotors that counter-rotate simultaneously. An operator sits in a seat mounted to the frame and steers the rotors with a pair of primary control levers that tilt the rotor
5533831 Obstacle bypass system for concrete finishing tools July 9, 1996
A concrete finishing tool that quickly changes in length to selectively bypass columns, curbs and other obstacles during concrete finishing includes a unique foldable bypass system at an extremity that can be folded between extended and retracted positions. When actively deployed the
5405216 Finishing trowel pitch control and clutch system April 11, 1995
An automatic, self locking clutch system effectuates blade pitch control on concrete finishing trowels. The clutch instantly releases upon the touch of the operator. A trowel has a downwardly projecting, motor-driven rotor comprising a plurality of radially spaced apart finishing blades
5352063 Polymer concrete paving machine October 4, 1994
A self-propelled paver that distributes, consolidates, places and finishes polymer concrete to rapidly resurface roadbeds. A mobile, wheeled chassis mounts an adjustable hopper that receives premixed polymer from a mixer truck that precedes the paver. A finishing assembly secured to the
5328295 Torsional automatic grade control system for concrete finishing July 12, 1994
A torsionally stabilized automatic grade control system for finishing plastic concrete is capable of controlling a variety of different elongated, multi-section concrete finishing tools such as a vibratory screed or the like, with or without forms. Skis that support the device facili
5288166 Laser operated automatic grade control system for concrete finishing February 22, 1994
An automatic grading control device for finishing plastic concrete controls several different elongated, multi-section concrete finishing tools such as vibratory screeds or the like, with or without forms. Supporting skis facilitate sliding, winch driven movement of the device relative t
5238323 Riding trowel for concrete finishing August 24, 1993
A riding trowel used for concrete finishing includes a dolly wheel lifting system. The lifting system elevates the trowel out of contact with the concrete surface when transporting, adjusting, or maintenancing the trowel. The trowel comprises a rigid metallic frame normally offset from
5108220 Light weight, fast steering riding trowel April 28, 1992
A compact, lightweight riding trowel for finishing concrete of enhanced maneuverability. A rigid frame is supported above the concrete by a pair of downwardly projecting synchronized rotors, each of which revolves multiple blades frictionally contacting the surface. Lights attached to
4798494 Floating vibrational screed January 17, 1989
A vibrating screed for striking off, float finishing and vibrating plastic concrete in a single pass, without being supported upon forms. A rigid, buoyant pan which floats and supports the screed comprises a generally planar surface portion in contact with the plastic concrete and a term
4741643 Laterally translatable, carriage-mounted, concrete finishing apparatus May 3, 1988
A concrete finishing apparatus includes a supporting frame having first and second spaced apart end sections engaging first and second guide tracks for advancing the apparatus along the length of an area of plastic concrete. A support element extends between the first and second end
4710054 Material spreader system December 1, 1987
A material spreader system is designed to dispense a topping material through a widthwise slot onto the surface of a plastic substance such as concrete lying within an area having a length, width, and opposing sides. The material spreader system includes a spreader for storing a supply o
4702640 Rotating tube concrete finisher October 27, 1987
A rotating tube concrete finisher is controlled and driven by an end handle assembly including an internal combustion engine. An outrigger wheel unit is coupled to the end handle assembly to form a stable end support for the end handle assembly and to support the weight of the end handle
4697951 Material spreader system October 6, 1987
A material spreader system is designed to dispense a topping material onto the surface of a plastic substance lying within an area having opposing sides. The material spreader system includes a spreader for storing a supply of topping material and for dispensing a layer of the topping
4685826 Vibratory screed including a laterally displaceable oscillating strike-off August 11, 1987
A vibratory concrete screed includes a frame having first and second ends and a length equal to or greater than the width of plastic concrete to be finished. A screed blade is coupled to the screed frame and engages the full width of the plastic concrete. Vibration generating structure i
4676690 Material spreader system June 30, 1987
A material spreader system includes an elevated bridge for spanning a section of plastic concrete. A spreader including a hopper having an elongated rectangular slot is translated back and forth across the bridge to dispense a widthwise stream of topping material onto the underlying
4659054 Lightweight concrete form having a detachable equipment rail April 21, 1987
A concrete form includes a horizontal base and a vertical face joined to the base. Load bearing brackets are coupled at spaced apart intervals along the exterior side of the concrete form to loosely support a detachable equipment rail from below while maintaining the upper surface of
4630964 Subgrading machine December 23, 1986
A subgrading machine precisely levels and contours the subgrade within an area having first and second parallel oriented forms including parallel upper surfaces vertically spaced above the subgrade and defining a form surface plane. A grading blade extends along the front of a triangular
4577993 Power trowel with cam-actuated blade pitch adjustment mechanism March 25, 1986
An engine-driven trowel includes a handle, a set of blades rotated within a single plane, a blade pitch control unit having a swash plate, a swash plate actuator arm and a pivot pin for pivotally coupling the actuator arm to the trowel. A blade pitch adjustment mechanism includes a l
4572704 High density concrete placing and finishing machine February 25, 1986
The present invention levels freshly poured concrete, internally vibrates a linear segment of that concrete and then moves forward and remixes a surcharged concrete layer to yield a more uniformly dense mass of concrete. The apparatus includes a bridge spanning the width of a plastic
4544346 Concrete screed with curb forming apparatus October 1, 1985
The present invention simultaneously finishes the surface of an area of plastic concrete and forms a curb along one or both sides of the area as the apparatus is translated along the length of the area. The apparatus includes a vibratory concrete finishing machine such as a triangular tr
4540312 Material spreader system with column bypass September 10, 1985
A material spreader system is designed to dispense a topping material onto the surface of a plastic substance lying within an area having a length, width and opposing sides. The material spreader system also includes features which enable it to dispense topping material within an area
4466757 Vibratory screed including a spreading device for leveling and distributing plastic concrete in August 21, 1984
A vibratory concrete screed includes a frame having first and second ends and a length equal to or greater than the width of plastic concrete to be finished. A screed blade is coupled to the screed frame and engages the full width of the plastic concrete. Vibration generating structure i
4412803 Adjustable support bracket for concrete finishing equipment November 1, 1983
A laterally and vertically adjustable support bracket can be coupled to an end of concrete finishing equipment such as a vibratory concrete screed to permit the equipment to be operated on a concrete surface which includes obstructions extending vertically from the edge area. The adjusta
4375351 Triangular truss concrete screed having a blade extension bracket March 1, 1983
A screed includes a triangular truss frame having first and second ends and a top support member forming the apex of the triangular truss. Front and rear screed blades are coupled in a spaced apart relationship to the lower portion of the front and rear of the frame. The screed includes
4363618 Triangular truss screed having an end mounted guide bracket for engaging a wall-mounted support December 14, 1982
A triangular truss screed includes first and second vertically oriented end brackets coupled to the first and second ends of the screed frame. Each end bracket includes front and rear vertically extending, spaced apart side members. A detachable guide bracket can be coupled to one of the
4349328 Triangular truss concrete screed having a pan float finisher attachment September 14, 1982
A triangular truss screed includes a frame having first and second ends and a top support member which forms the apex of the triangular truss. Front and rear screed blades extend between the first and second ends of the screed frame and are coupled in a spaced apart relationship to the l
4349294 Concrete topping spreader system September 14, 1982
The present invention uniformly spreads a topping material over a wet concrete surface and includes a spreader, a bridge and a drive system. The spreader stores a supply of topping material and dispenses a uniformly wide layer of the topping material as it is translated along the bridge.
4316715 Vibratory concrete screed having an adjustable extension bracket February 23, 1982
A vibratory concrete screed includes a generally triangular, open support frame to which front and rear screed blades are coupled. Air vibrators are coupled at intervals along the front and rear screed blades to impart vibratory motion to the blades. First and second end brackets are cou
4314773 High density concrete placer February 9, 1982
A high density concrete placer is longitudinally translatable along a pair of parallel oriented support rails positioned adjacent to an area in which wet concrete has been poured. The concrete placer includes a bridge having first and second ends and first and second roller assemblies co
4249327 Fine grader February 10, 1981
A fine grader for fine grading the surface of the subgrade on which fresh concrete is to be poured to form a uniformly level surface for receiving freshly poured concrete is formed by coupling together a fine grader attachment with a vibratory screed. The screed includes first and second

 
 
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