EP2232092A1 - Effort reducing start mechanism for hydraulically propelled vehicles - Google Patents

Effort reducing start mechanism for hydraulically propelled vehicles

Info

Publication number
EP2232092A1
EP2232092A1 EP08860987A EP08860987A EP2232092A1 EP 2232092 A1 EP2232092 A1 EP 2232092A1 EP 08860987 A EP08860987 A EP 08860987A EP 08860987 A EP08860987 A EP 08860987A EP 2232092 A1 EP2232092 A1 EP 2232092A1
Authority
EP
European Patent Office
Prior art keywords
engine
speed
clutch
idle speed
propelled vehicles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08860987A
Other languages
German (de)
French (fr)
Other versions
EP2232092A4 (en
Inventor
Mark M. Kiviahde
James C. Schroeder
Mariusz J. Luczak
David M. Larsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Graco Minnesota Inc
Original Assignee
Graco Minnesota Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Graco Minnesota Inc filed Critical Graco Minnesota Inc
Publication of EP2232092A1 publication Critical patent/EP2232092A1/en
Publication of EP2232092A4 publication Critical patent/EP2232092A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing
    • B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of fluid gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D31/00—Fluid couplings or clutches with pumping sets of the volumetric type, i.e. in the case of liquid passing a predetermined volume per revolution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D43/00—Automatic clutches

Definitions

  • Line striper propulsion units are well known such as those sold under the LINEDRIVER trademark by the assignee of the instant invention.
  • a gasoline engine directly drives a hydraulic pump that supplies a hydrostatic drive system. While such units work well for their intended use, when used in colder temperatures, the engine is hard to start because the high viscosity of the hydraulic fluid at lower temperatures makes it hard to (pull or electrically) start the engine.
  • a centrifugal clutch of a known type is placed between the engine and the hydraulic pump.
  • the clutch is designed to engage just above tile engine's idle speed.
  • the clutch is designed to engage between the cranking (recoil or electric) speed and the idle speed. In this preferred embodiment, once the engine catches, the clutch will be engaged to that there will be no engagement or disengagement during normal operation.
  • Figure 1 shows the engine-clutch-pump combination of the instant invention.
  • Figure 2 shows a schematic layout of a propulsion unit.
  • a propulsion unit such as would be used to propel a line striper, is generally designated 10 and is provided with a gasoline engine 12 which may have either a pull/recoil or an electrical starter.
  • Engine 12 is connected via a centrifugal clutch 14 of a known type to a hydraulic pump 16 which includes a hydrostatic drive unit 18 which is in turn connected to wheel motors 20.
  • the clutch 14 is designed to engage between the cranking (recoil or electric) speed and the idle speed.
  • the cranking speed may be 600 rpm, the engagement speed 830 rpm and the idle speed 1440 rpm.
  • the clutch will be engaged to that there will be no engagement or disengagement during normal operation. It is contemplated that various changes and modifications may be made to the propulsion unit without departing from the spirit and scope of the invention as defined by the following claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

A propulsion unit 10, used to propel a line striper, is provided with a gasoline engine 12 which may have either a pull/recoil or an electrical starter. Engine 12 is connected via a centrifugal clutch 14 of a known type to a hydraulic pump 16 which includes a hydrostatic drive unit 18. In the preferred embodiment, the clutch 14 is designed to engage between the cranking speed and the idle speed.

Description

EFFORT REDUCING START MECHANISM FOR HYDRAULICALLY
PROPELLED VEHICLES
TECHNICAL FIELD
This application claims the benefit of US Application serial number 61/015,057, filed December 19. 2007, the contents of which are hereby incorporated by reference.
BACKGROUNB ART
Line striper propulsion units are well known such as those sold under the LINEDRIVER trademark by the assignee of the instant invention. In such units, a gasoline engine directly drives a hydraulic pump that supplies a hydrostatic drive system. While such units work well for their intended use, when used in colder temperatures, the engine is hard to start because the high viscosity of the hydraulic fluid at lower temperatures makes it hard to (pull or electrically) start the engine.
DISCLOSURE OF THE INVENTION
A centrifugal clutch of a known type is placed between the engine and the hydraulic pump. In the broader sense of the invention, the clutch is designed to engage just above tile engine's idle speed. In the preferred embodiment, the clutch is designed to engage between the cranking (recoil or electric) speed and the idle speed. In this preferred embodiment, once the engine catches, the clutch will be engaged to that there will be no engagement or disengagement during normal operation.
These and other objects and advantages of the invention will appear more fully from the following description made in conjunction with the accompanying drawings wherein like reference characters refer to the same or similar parts throughout the several views.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 shows the engine-clutch-pump combination of the instant invention.
Figure 2 shows a schematic layout of a propulsion unit.
BEST MODE FOR CARRYING OUT THE INVENTION
A propulsion unit, such as would be used to propel a line striper, is generally designated 10 and is provided with a gasoline engine 12 which may have either a pull/recoil or an electrical starter. Engine 12 is connected via a centrifugal clutch 14 of a known type to a hydraulic pump 16 which includes a hydrostatic drive unit 18 which is in turn connected to wheel motors 20. In the preferred embodiment, the clutch 14 is designed to engage between the cranking (recoil or electric) speed and the idle speed. By way of example, the cranking speed may be 600 rpm, the engagement speed 830 rpm and the idle speed 1440 rpm. In this preferred embodiment, once the engine catches, the clutch will be engaged to that there will be no engagement or disengagement during normal operation. It is contemplated that various changes and modifications may be made to the propulsion unit without departing from the spirit and scope of the invention as defined by the following claims.

Claims

1. In a propulsion unit having a gas engine, a hydraulic pump driven by said gas engine and a hydrostatic drive, the improvement comprising a centrifugal clutch being driven by said engine and driving said hydraulic pump.
2. The propulsion unit of claim 1 wherein said engine has an idle speed and centrifugal clutch engages above said idle speed.
3. The propulsion unit of claim 1 wherein said engine has an idle speed and a cranking speed and centrifugal clutch engages between said idle speed and said cranking speed.
EP08860987A 2007-12-19 2008-12-15 Effort reducing start mechanism for hydraulically propelled vehicles Withdrawn EP2232092A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US1505707P 2007-12-19 2007-12-19
PCT/US2008/086843 WO2009079459A1 (en) 2007-12-19 2008-12-15 Effort reducing start mechanism for hydraulically propelled vehicles

Publications (2)

Publication Number Publication Date
EP2232092A1 true EP2232092A1 (en) 2010-09-29
EP2232092A4 EP2232092A4 (en) 2012-01-25

Family

ID=40795892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08860987A Withdrawn EP2232092A4 (en) 2007-12-19 2008-12-15 Effort reducing start mechanism for hydraulically propelled vehicles

Country Status (4)

Country Link
US (1) US20110194952A1 (en)
EP (1) EP2232092A4 (en)
CN (1) CN101896730A (en)
WO (1) WO2009079459A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8662857B2 (en) 2010-01-29 2014-03-04 Wagner Spray Tech Corporation Pressure control for a fluid sprayer
US11148161B2 (en) 2018-07-27 2021-10-19 Avant-Garde Ip Llc Height adjustment system for one or more spray guns used in a line striper
US10828656B2 (en) 2018-07-27 2020-11-10 Avant-Garde Ip Llc Height and rotational adjustment system for one or more spray guns used in a line striper

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224512A (en) * 1963-07-29 1965-12-21 Samuel Roberts Noble Found Inc Soil sampler
US3511219A (en) * 1968-11-12 1970-05-12 Wisconsin Motors Corp Automatic compression release
US4418808A (en) * 1980-05-21 1983-12-06 Nisshin Kogyo Kabushiki Kaisha Centrifugal clutch brake arrangement for farm work machinery or other apparatus
US4369616A (en) * 1980-10-27 1983-01-25 Cody John M Centrifugal clutch and brake for lawnmower
US4667786A (en) * 1984-08-24 1987-05-26 Kioritz Corporation Blade-brake clutch device for lawn mower
DE3611694A1 (en) * 1986-04-08 1987-10-15 Stihl Maschf Andreas Centrifugal clutch
US4841929A (en) * 1987-12-17 1989-06-27 White Consolidated Industries, Inc. Portable rotary power tool
US4899550A (en) * 1988-07-18 1990-02-13 Carrier Corporation Refrigeration unit and hydraulic power system
US5292040A (en) * 1992-03-17 1994-03-08 Leemac Industries, Inc. Apparatus for applying seamless flooring material
SE501941C2 (en) * 1993-09-16 1995-06-26 Husqvarna Ab Hydraulic system for operation of a working organ
JPH0949408A (en) * 1995-08-07 1997-02-18 Sanshin Ind Co Ltd Outboard engine with automatic decompression device
US6523408B1 (en) * 2000-07-27 2003-02-25 Hunter Engineering Company Wheel balancer system with improved matching capabilities
JP4341804B2 (en) * 2001-01-23 2009-10-14 本田技研工業株式会社 Brush cutter
US6641504B2 (en) * 2001-03-21 2003-11-04 Eaton Corporation Method and system for establishing an engine speed target for use by a centrifugal clutch control system to launch a vehicle
US7159701B2 (en) * 2004-05-20 2007-01-09 Parker Hannifin Corporation Automatic drag brake for a power take-off unit output shaft
JP4490846B2 (en) * 2005-02-21 2010-06-30 本田技研工業株式会社 Engine decompression device
US7717250B2 (en) * 2007-01-03 2010-05-18 The Hilliard Corporation Tunable centrifugal clutch

Also Published As

Publication number Publication date
EP2232092A4 (en) 2012-01-25
CN101896730A (en) 2010-11-24
US20110194952A1 (en) 2011-08-11
WO2009079459A1 (en) 2009-06-25

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