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Assignee: Graco Inc.


Location: Minneapolis, MN
No. of patents: 137

1        
NumberTitleIssue Date
6811351Self aligning mechanical pointer
A self-aligning mechanical pointer (10), includes a frame (12) attached to the front of a vehicle (14). A guide wheel (16) rides on a road surface and is rotatably carried by a wheel holder (18). The wheel holder (18) is con...
11/02/2004
6554204Integrated gun flush controller
A gun flush box is controlled by a plural component proportioning unit. When a color change is desired, the operator places the spray gun in the flush box. When a new color is selected, the control system automatically triggers the gun and flushes the gun...
04/29/2003
6543647Method and device for dosing and mixing different components
In a method for metering and mixing different components, more particularly resin and hardener, and for delivery through a spray device (6), with a first component standing under a preliminary pressure, a second component standing under a preliminary pres...
04/08/2003
6533488Airless sprayer drive mechanism
An airless spray pump has a drive train is comprised of a motor having an output gear thereon which drives a combination gear assembly comprised of two gears mounted on a shaft which in turn drives a crank assembly which is comprised of a one-piece eccent...
03/18/2003
6510966Rotary vibrating applicator for viscous materials
An air driven vibrator is attached to a robotic applicator for sealants and adhesives. When the plane of vibration is normal to the axis of the dispenser, the vibration will impart a rotary motion to the applicator. When the plane of vibration is parallel...
01/28/2003
6138872Apparatus for dispensing of two component adhesive from static mixer
An apparatus for dispensing of two component adhesive utilizes a conventional static mixer which is supplied with an insert providing a reduced outlet diameter source to allow streaming of the adhesive from the mixer....
10/31/2000
6076705Heated follower plate
A heated follower plate for use with drum end loaders has a number of concentric downwardly facing ribs which have heating elements located in the lower ends thereof. A plurality of radial passages are provided which alternate between those which extend f...
06/20/2000
6047906Non-drip dispensing nozzle
The nozzle is designed for fitting on the end of a metered dispense valve which is used in fluid delivery systems such as lubricant dispensers for use in vehicle servicing and the like. The device in this application accommodates thermal expansion between...
04/11/2000
6019293Domed air cap
The invention is concentrated at the front end of such an air spray or HVLP gun and in particular details the relationship between the exterior of the fluid nozzle and the inside of the air cap. In particular, the fluid nozzle has a generally frustoconica...
02/01/2000
6019294Interchangeable feed airspray/HVLP spray gun
A spray gun is easily convertible between a number of configurations. A removable fluid insert may be placed in interchangeable (airspray and HVLP) spray heads with the fluid insert being either a pressure fed device which depends downwardly from the fron...
02/01/2000
5971714Electronic CAM compensation of pressure change of servo controlled pumps
The construction and operation of the control of this invention is designed to minimize pressure changes at pump changeover by sampling pump pressure characteristics for each pump cycle, calculating a compensating motion profile and applying the profile t...
10/26/1999
5961300Diaphragm pump plural component dispensing system with integrator
A relatively inexpensive and easy to operate plural component dispensing apparatus is made up of one or more double sided pumps, such as an air-operated double diaphragm pump. The manifolding on the pumps is divided so that each side of the pump pumps one...
10/05/1999
5947385Vehicle towed apparatus for striping of roads
A line striper is attached to a vehicle with a two point hitch and has a swivelable rotatable wheel mounted thereunder to support the striper on the ground. A main beam is releasably clamped and may be slid from side to side depending on operator preferen...
09/07/1999
5941418Multiple fluid dispensing system
A device for dispensing multiple fluids in, for instance, a vehicle service facility is provided with a plurality of control modules. Each of those modules is capable of being connected to a number of pumps, a number of solenoid valves and a number of met...
08/24/1999
5882428Method of flushing a circulation system using first and second rigs
This cleaning system is designed to automated and minimize or eliminate the excessive amount of manpower associated with other suction processes. It is a combination of paint recovery, and flushing methods in a automated manner. It is designed to minimize...
03/16/1999
5860794Double diaphragm pump with air valve block moving in a rectangular pattern
An air operated double diaphragm pump is provided with an air valve assembly which allows the valve cup to move in a rectangular pattern....
01/19/1999
5699817Turbulent flow conduit cleaning apparatus
A system for cleaning of piping system using turbulent flow is provided by providing an input of a fixed flow rate of compressed air and a fixed flow rate of cleaning fluid. The fixed fluid flow is provided by either using an electric pump which may be co...
12/23/1997
5647543Electrostatic ionizing system
An improved electrostatic ionizing system for use in connection with a spray gun, having a conductive needle positioned near the center of the spray gun spray pattern, the needle having a diameter of less than about 250 micrometers and a needle tip sharpe...
07/15/1997
5605446High viscosity material pump having valved priming piston
A reciprocable liquid pump having a priming cylinder affixed beneath the lower valve housing, and a priming piston rod affixed to the lower end of the pump piston valve assembly. A priming piston and priming valve are affixed to the lower end of the primi...
02/25/1997
5586045Method of calibrating a high resolution flowmeter and measuring volume flow
A method of calibrating and measuring volume flow through a gear-type flowmeter, having a magnetic sensor affixed to the flowmeter to detect incremental movement of the flowmeter teeth. The sensor is connected to an analog-to-digital converter and compute...
12/17/1996
5567130Reinforced cover configuration for a diaphragm pump
A diaphragm pump housing is designed for molding out of plastic and utilizes a ribbing design which allows a high degree of strength while using a minimal amount of material and/or material having lesser strength. The rib design has an outer circumferenci...
10/22/1996
5526986Waterbase voltage block and paint valve
A voltage isolation device for controlling the flow of conductive liquid between a liquid supply source and a liquid destination source. The isolation device has an inlet connected to the supply source and has a yoke slide valve positionable along a pair ...
06/18/1996
5433587Paint circulating method with viscosity indicator and paint agitating means
A paint circulation system for supplying paint to a plurality of distributors utilizing a circulating pump to circulate paint to the distributors and an injection pump operated by a closely controlled electric motor for injecting paint into the circulatio...
07/18/1995
5407332High suction intake wiper
In a priming piston loading double acting pump for high viscosity materials, the shovel plate assembly is formed of a flexible, abrasion resistant disk or cup. The disk may be made from silicon rubber and the cup may be made from a glass filled Teflon pol...
04/18/1995
5407106Automatic/manual sealant disperser with attachable handle and reversible valve seat
The dispense valve is designed for application of high viscosity fluids and is designed so that it is equally effective and usable in manual or automatic versions. The valve is air operated and the air section and fluid sections may be swiveled relative t...
04/18/1995
5368059Plural component controller
This invention is useful in a plural component system which utilizes sequential metering of multiple fluids. In such a system for dispensing component fluids such as paint, the controller dispenses a given amount of a first fluid, and then part way throug...
11/29/1994
5368454Quiet check valve
This invention represents an improvement in a standard four ball reciprocating piston pump. Such pumps utilize a greatly enlarged seat to provide hydraulic cushioning of the check balls in order to greatly quiet operation. A seat width on the order of 6% ...
11/29/1994
5363739Reduced icing low friction air valve
An external air valve for a reciprocating air motor is provided with a the ability to transfer heat from incoming compressed air into the valve cups to prevent icing and a low friction mechanism for the valve slide to enhance reliability. The design has a...
11/15/1994
5361940Pump evacuation system for bulk containers of high viscosity fluids
A ram assembly is designed for evacuating "bag-in-a-box" square bulk containers of viscous materials. The ram cylinder is centered over the bulk container and mounted so as to float relative to the frame allowing accomodation of various containers. An inf...
11/08/1994
5348230Planar foam nozzle
A nozzle for use in a foam gun is designed so that the ports for the two materials both enter the flow passage in the same plane. This serves to eliminate lead/lag flow conditions which result in portions of the material being off-ratio. Counterbored or m...
09/20/1994
5344120Airless spray gun needle assembly
A needle assembly for an airless spray gun is provided with a needle which is centerless ground and electropolished to greatly increase life. Further life enhancements are gained by use of a plastic needle bushing in the needle clamp and provision of a sp...
09/06/1994
5330106Hose swivel system for dispensers
A dispenser system wherein the dispensed material is supplied to a valved nozzle through flexible hoses. The valved nozzle is located in a dispenser gun usually hand held and a swivel distributor interconnecting the hoses to the dispenser gun structure ac...
07/19/1994
5299741Texture spray gun bleed valve
A spray gun is designed for use with a texture pumping unit which requires of air through the spray gun in order to start the pump. A bleed valve is provided which alternatively directs air to the front of the gun or may be bled to the outside to allow th...
04/05/1994
5289977Electrostatic spray gun power supply connection
An electrostatic spray gun for the application of paints and other coatings has a high voltage power supply having a contact at the front end thereof. A flange on the end of the power supply surrounds the contact and a rubber boot seal snaps over the flan...
03/01/1994
5277099Reduced icing low friction air valve
An external air valve for a reciprocating air motor is provided with a the ability to transfer heat from incoming compressed air into the valve cups to prevent icing and a low friction mechanism for the valve slide to enhance reliability. The design has a...
01/11/1994
5255892Plural component air operated snuff-back dispense valve
A hardened needle and seat are provided in a dispense valve wherein the seat is spring loaded such that when the needle is pulled back against the seat, the seat moves away from the dispense opening causing a "snuff back" effect. Hardened seats and needle...
10/26/1993
5242271Rotary power fill device
A device for dispensing oils, antifreeze and other fluids from drums or other bulk containers has a rotary air motor which powers a gerotor-type pumping element. The pumping element has at least one magnet thereon and an electronics package is provided wh...
09/07/1993
5222841Form tool system
A system is provided for a set of form tools which utilize a common shank to be able to machine a number of different shapes. A pad is provided which sits between the cutting tool and the shank where the pad is of such a shape and dimension as to provide ...
06/29/1993
5220259DC motor drive system and method
A DC motor drive system for providing an enhanced motor speed/torque relationship, where circuits modify the motor field winding control switching sequence to compensate for speed effects on motor torque output and to compensate on transient loading effec...
06/15/1993
5213480Pump lift mechanism
A small wheelable line striper is provided with a gasoline engine powered pump which has an outlet designed for direct immersion into a container of paint or other coating material. The gasoline engine and pump are mounted on a pump frame which is attache...
05/25/1993
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