Patent
Over-travel actuation system
| العنوان: | Over-travel actuation system |
|---|---|
| Patent Number: | 5,492,096 |
| تاريخ النشر: | February 20, 1996 |
| Appl. No: | 08/273,730 |
| Application Filed: | July 12, 1994 |
| مستخلص: | A power tool having an engine, a throttle control cable, and an electric starter assembly with a user actuated start switch. The start switch has an over-travel actuator section for moving the throttle control cable an over-travel distance. The throttle control cable is connected to the throttle of the engine by an over-travel actuation member. The over-travel actuation member is adapted to move the throttle and, when the control cable is moved the over-travel distance, actuate a compression release system of the engine. |
| Inventors: | Isaacs, Claudia A. (Charlotte, NC); Schorr, Keith M. (Charlotte, NC); Reiss, Jan J. (Matthews, NC) |
| Assignees: | Homelite, Inc. (Charlotte, NC) |
| Claim: | What is claimed is |
| Claim: | 1. A system for starting a power tool comprising |
| Claim: | a starter assembly; and |
| Claim: | a throttle control connected to an engine of the power tool; |
| Claim: | wherein the starter assembly includes an over-travel actuator for moving a portion of the throttle control when the starter assembly is moved towards a start position and the portion includes a control cable that is moved by the starter assembly. |
| Claim: | 2. A system as in claim 1 wherein the starter assembly comprises a user actuated start switch with a laterally extending over-travel actuator section for moving the control cable when the switch is moved. |
| Claim: | 3. A system as in claim 1 further comprising a compression release system suitably positioned relative to the throttle control to be actuated by the throttle control. |
| Claim: | 4. A system as in claim 3 wherein the compression release system includes a spring biased plunger for opening an aperture to a cylinder of the engine and a member connected to a throttle of the engine, the member being moved by the control cable to control the throttle and the compression release system. |
| Claim: | 5. A system for starting an internal combustion engine comprising |
| Claim: | a starter assembly; |
| Claim: | a compression release system connected to a cylinder of the engine; and |
| Claim: | means for automatically moving the compression release system to an open position when the starter assembly is moved to a start position, wherein the means for moving comprises a member at a throttle of the engine adapted to physically contact and move a portion of the compression release system. |
| Claim: | 6. A system as in claim 5 wherein the means for moving comprises a throttle control cable connected to the member and a throttle trigger. |
| Claim: | 7. A system as in claim 6 wherein the means for moving comprises a start switch of the starter assembly being adapted to move the throttle control cable. |
| Claim: | 8. A system as in claim 7 wherein the start switch has a laterally extending over-travel actuator section for contacting and moving the throttle control cable. |
| Claim: | 9. A power tool comprising |
| Claim: | an internal combustion engine with a throttle; |
| Claim: | a throttle control system having a throttle lever, a control cable connected between the throttle lever and the throttle, and an over-travel actuation member connected to the throttle |
| Claim: | wherein the over-travel member is adapted to actuate the compression release system when the throttle is moved by the control cable to a predetermined position. |
| Claim: | 10. A power tool as in claim 9 wherein the over-travel actuation member is fixedly mounted to a shaft of the throttle. |
| Claim: | 11. A power tool as in claim 9 further comprising an over-travel actuator for moving the control cable to thereby move the over-travel actuation member to the predetermined position. |
| Claim: | 12. A power tool as in claim 11 wherein the over-travel actuator is comprised of a portion of a start switch that moves the control cable when the start switch is moved to a start position. |
| Claim: | 13. A power tool as in claim 12 wherein the portion extends laterally from a main body of the start switch and, the portion is not directly connected to the control cable. |
| Claim: | 14. A system for controlling a power tool comprising |
| Claim: | an over-travel actuator; and |
| Claim: | a throttle control connected to an engine of the power tool, the throttle control having a throttle actuator connected to the engine by a throttle control cable; |
| Claim: | wherein the over-travel actuator is adapted to contact and move the throttle control cable an over-travel distance past a fully open throttle position. |
| Claim: | 15. A system for starting a power tool comprising |
| Claim: | a throttle control connected to an engine of the power tool, wherein the starter assembly includes an actuator for moving a portion of the throttle control when the starter assembly is moved towards a start position; and |
| Claim: | a compression release system suitably positioned relative to the throttle control to be actuated by the throttle control. |
| Claim: | 16. In a power tool having a motor, a throttle control with a control cable, and an electric starter assembly with a user actuated start switch, the improvement comprising |
| Claim: | the start switch having an actuator section that directly contacts and moves the control cable. |
| Claim: | 17. A tool as in claim 16 wherein the start switch has a first section movably mounted to a housing, a second electrical contact section, and a third section adapted to be contacted by a user to actuate the switch. |
| Claim: | 18. A tool as in claim 17 wherein the actuator section is integrally formed with a main body of the switch and the second section has a metal contact connected to the main body. |
| Claim: | 19. A tool as in claim 17 wherein the first section is pivotably mounted to the housing. |
| Claim: | 20. A tool as in claim 16 wherein the actuator section extends generally laterally from the start switch. |
| Current U.S. Class: | 123/396; 12317/918; 1231/821 |
| Current International Class: | F02N 1708 |
| Patent References Cited: | Re27410 June 1972 Anderson et al. 1862006 June 1932 Collins 2347251 April 1944 Burrell 2742380 April 1956 Peters 3538899 November 1970 Burkett 3774303 November 1973 Burkett et al. 3782354 January 1974 Tuckey 4204384 May 1980 Holtermann 4217796 August 1980 Donohue 4619228 October 1986 Liu |
| Other References: | 1. Owner's Manual, Tanaka Auto-Start Brush Cutter AST-5000, 2 pages, 1993. (month unknown). |
| Primary Examiner: | Dolinar, Andrew M. |
| Attorney, Agent or Firm: | Perman & Green |
| رقم الانضمام: | edspgr.05492096 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |