CA1251047A - Lawn mower dead man control - Google Patents
Lawn mower dead man controlInfo
- Publication number
- CA1251047A CA1251047A CA000546970A CA546970A CA1251047A CA 1251047 A CA1251047 A CA 1251047A CA 000546970 A CA000546970 A CA 000546970A CA 546970 A CA546970 A CA 546970A CA 1251047 A CA1251047 A CA 1251047A
- Authority
- CA
- Canada
- Prior art keywords
- handle
- control
- housing
- control element
- movement
- 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.)
- Expired
Links
Abstract
ABSTRACT
There is described a lawn mower having a housing supported on ground engaging wheels. A motor is mounted in the housing and drives a cutter blade through a clutch mechanism.
A control handle is movably mounted on a handle which is in its turn mounted on the housing. A linkage is connected to the control handle to the motor and to one of the wheels for selectively propelling the housing along the ground in response to movement of the control handle, a control element movably mounted on the control handle, and additional linkage means connected to the control element, to the motor, and to the clutch for selectively engaging the clutch in response to con-trol element movement to rotate the cutter blade.
There is described a lawn mower having a housing supported on ground engaging wheels. A motor is mounted in the housing and drives a cutter blade through a clutch mechanism.
A control handle is movably mounted on a handle which is in its turn mounted on the housing. A linkage is connected to the control handle to the motor and to one of the wheels for selectively propelling the housing along the ground in response to movement of the control handle, a control element movably mounted on the control handle, and additional linkage means connected to the control element, to the motor, and to the clutch for selectively engaging the clutch in response to con-trol element movement to rotate the cutter blade.
Description
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LAWN MOWER DEAD ~AN CONTROL
RELATED APPLICATION
This application is a division of Canadian Application Serial No. 435,967 filed Sept. 2, 1983.
BACKGROUND
This invention relates to dead man control arrangements Eor both push and self-propelled lawn mowers. Attention is direc-ted to the U.S. Hurd Patent No. 4,335,566 which discloses a single control member for actuating a clutch drive and mower propelling means, unlike the invention disclosed herein.
Attention is directed to Canadian Patent 1,169,256, issued June 19, 1984, which is directed to energizing means including an electric switch.
SUMMARY OF THE INVENTION
- The invention provides a lawn mower comprising a housing, a plurality of wheels supporting the housing for travel over the ground, a prime mover supported by the housing, a cutter blade, clutch means connected to the cutter blade, a handle connected to the housing, a control handle movably mounted on the handle, linkage means connected to the control handle, to the primer mover, and to one of the wheels for selectively propelling the housing along the ground in response to movement of the ~L~25~47 control handle, a control element rnovably mounted on the control handle, and additional linkage means connected to the control element, to the prime mover, and to the clutch means for selectively engaginq -the clutch means in response to control element movement to rotate the cutter blade.
The invention also provides a lawn mower comprising a housing, a plurality of wheels supporting the housing for travel over the ground, a prime mover supported by the housing, a cutter blade, clutch means for selectively driving the cutter blade by the prime mover, a handle connected to the housing, a control handle movably mounted on the handle, linkage means connected to the control handle, to the prime mover, and to one of the wheels for selectively propelling the housing along the ground in response to movement of the control handle, a control element movably mounted on the control handle, additional linkage means connecting the control element to the clutch means for operational control of the the clutch means in response to control element movement, which control element includes a notch near the mounting of the control element on the control handle, and lock lever means for preve:nting inadvertent movement of the control element a:nd comprising a V-shaped lever pivotally mounted on the control handle adjacent the notch and pivotal between a position wherein the lever is ~2S~4'7 received in the notch so as to prevent pivotal movement of the control ellement, and a position wherein the lever is out of the notch so as to permit pivotal movement of the control element.
Various of the features and advantages of various embodiments of the invention will become apparent upon reviewing the following drawings, the detailed description and the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a side view of a self-propelled lawn mower including various of the features of the invention.
Figure 2 is a top view partially in section of the upper portion of a guiding handle for a push lawn mower.
Figure 3 is a side view of the upper portion of the guiding handle shown in Figure 2.
Figure 4 is a top view partially in section of the upper portion of a guiding handle portion of the self-propelled lawn mower shown in Figure 1.
Figure 5 is a side view of the upper portion of the guiding handle shown in Figure 4.
Figure 6 is a partial perspective view of a blad~e energizing means.
Before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or carried out in various ways.
Also, it is to be understood that the phraseology and terminology e~ployed herein is for the purposes of description and should not be regarded as limiting.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Shown in the drawings is a lawn mower 10 including a blade housing 12 supporting a prime mover 14 which drives a cutter blade 16. The blade housing 12 is suitably supported for travel over the ground by a plurality of wheels 18 and is guided for travel over the ground by a guiding handle 20. The guiding handle 20 is generaly U-shaped and includes a cross bar 22 at the upper or operator end.
More particularly, the prime mover 14 can be either an internal combustion engine or an electric motor which rotatably drives an output or drive shaft or an alternative drive member 24 including a lower end portion adapted to support and drive the rotary cutter blade 16.
Further included is energizing means 26 for permitting energizing of or delivering of power ~L25~q to a rotary component driven by the engine such as a propelling wheel or the cutter blade 16. In the disclosed construction the energizing means 26 is a clutch and brake means Eor providing a selective driving engagement between the drive shaft 24 and the cutter blade 16 such that the cutter blade 16 can be selectively driven by the drive shaft 24 and such that the driving engagement between the cutter blade 16 and the drive shaft 24 can be disengaged.
The energizing means 26 can also be an electrical switch 27 operable to shut down the prime mover 14, together with a brake 28 operable to brake the cutter blade 16. The blade brake 28 includes a brake arm 29, as shown in Figure 6, which is movable between a blade free position, wherein the cutter blade 16 is free to rotate, and a blade braked position, wherein the brake 28 acts to brake the cutter blade 16. When the brake arm 29 is moved from the blade free position to the blade braked position, the brake arm 29 engages the electric switch 27 which serves to lock out the electrical starter or ground the ignition system to shut off the prime mover.
Where the prime mover 14 is an electric motor, the brake arm 29 engages the switch 27 to disconnect a source of electric potential to the electric motor.
When the brake arm 29 moves back to the blade free position, the prime mover 14 can be either automatically restarted by the disengaging of the switch 27 or manually restarted, depending on the starter system used on the mower lO.
The lawn mower lO further includes means providing for wheel adjustment and driving of the wheels 18 to allow for self-propulsion of the lawn mower lO. To this encl the lawn mower includes means 30 (shown symbolicly in Fig. l) for engaging the wheels 18 of the lawn mower lO. Any suitable means 30 for propelling the lawn mower 10 can be used, an example of which is more particularly described in Shaw U.S. Patent 2,947,132, issued August 2, 1960.
The lawn mower 10 further includes control means for controlling the self-propulsion of the lawn mower. The control means comprises an upper handle 42 capable of limited independent movement relative to the guide handle 20 on the lawn mower 10. The upper handle 42 is generally U-shaped in construction, as shown in Fig. 4, and includes a cross bar 44 connecting two arms 45 and 47, and is rotatably attached to the upper or operator end 22 of the guiding handle 20 by suitable means 49.
The control means also includes linkage means movable in response to pivotal movement of the upper handle 42 for causing the operation of the mower propelling means 30. The linkage means includes a rigid member or link 46 connected to the arm 45 of the upper handle 42 at a position above the ~.;2S~147 point of pivotal attachment 49 of the arm 45 to the guiding handle 20. The link 46 is also operably connected to the mower propelling means 30. Forward movement of the upper handle 42 toward the blade housing 12 (as shown in Fig. 5) moves the link 46 forward and causes the operation of the mower propelling means 30. Rearward movement of the upper handle 42 accordingly causes disengagement of the mower propelling means 30.
The lawn mower further includes operating means for operating the energizing means.
The operating means includes a control or dead man control bail 5n capable of limited independent movement relative to the upper handle 42. The control bail 50 is generally U-shaped and configured so that a cross bar 52 connecting two arms 54 and 56 of the bail 50 is disposed adjacent the cross bar 44 of the upper handle when in a blade de-energized position so the control bail 50 and upper handle 42 can be grasped by an operator simultaneously. The control bail 50 is connected to the upper handle 42 by suitable means 58 providing for pivotal movement of the control bail 50 relative to the upper handle 42.
The operating means further includes means for operating the energizing means 26 by the pivotal movement of the control bail 50.
~L:25~04s~
More particularly, the means includes a flexible membef or bowden wire 60 connected to the control bail 50 adjacent but above the pivotal attachment of the control bail 50 to the upper handle 42. The flexible member 60 is also operably connected to the energizing means 26 to rotate the cutter blade 16 when the flexible member 60 moves rearwardly away from the housing 12 and to de-energize and brake the cutter blade 16 when the flexible member 60 moves forwardly toward the housing 12.
Biasing means are also provided for biasing the flexible member 60 and control bail 50 in the blade de-energized direction. In this embodiment, the biasing means comprises a spring 65, as shown in Fig. 1. A more detailed description of a spring 65 and one energizing means 26 are described in the U.S. Poehlman, Patent 4,322,935, issued April 6, 1982. In the energizing means 26 embodiment shown in Figure 6, the flexible member 60 is operably connected to one side of the brake arm 29 and the spring 65 is connected to the other side of the brake arm 29. In another embodiment, a combination biasing and energizing means 26 can be used, such as the self-biasing clutch and brake means described in the Bent et al U.S. Patent 4,307,558, issued December 29, 1981.
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Means are further provided for restricting a substantial portion of the flexible member 60 to a predetermined path extending along the guiding handle 20. More particularly, the restricting means includes a pulley 70 rotatably attached to the center of the inside of the guiding handle 20 near the control bail 50 along the path of the flexible member 60 between the control bail 50 and the energizing means 26. The flexible member 60 is guided around and under the pulley 70 and held in a slot 71. The rotational path of the pulley 70 and the pivotal path of movement of the control bail 50 are generally vertical and parallel so as to limit the sideways movement of the flexible member 60 between the pulley 70 and the control bail 50.
Means are further provided for permitting the control bail 50 to pivot independently from the upper handle 42, and the upper handle 42 to rotate independently from the control bail 50. More particularly, the means compris~s a guide means or the pulley 70 rotatably attached to the inside of the guiding handle 20 so a periphery 72 of the pulley 7Q
contacts the flexible member 60 and is generally adjacent t:he pivotal attachment of the upper handle 42 to the guiding handle 20. As a result of the location of the pulley 70, when the upper handle 42 is pivotecl the flexible member 60 rotates about a point generally fixed by the periphery 72 of the ~s~
pulley and corresponding to where the upper handle 42 pivots on the guiding handle 20. Since the flexible member 60 only rotates and does not move either toward or away from the energizing means 26, the upper handle 42 can be rotated and the mower propelling means 30 operated independently from the operating means. Since the distance of the attachment of the flexible member 60 to the control bail 50 relative to the pulley 70 and upper handle 42 remains the same even though the upper handle 42 has moved relative to the guiding handle 20, the control bail 50 can be pivoted and the operating means can be operated independently from the mower propelling means 30.
Means are further provided for locking the dead man control or bail 50 so as to prevent inadvertent movement of the control bail 50. More particularly, the means includes a generally V-shaped lever 80 pivotally connected to the center of the inside of the upper handle 42 and adjacent the end 82 of the cont.rol bail 50 and including, as shown in the drawings, an open portion. The end 82 of the control bail 50 includes a plate 84 having a rounded edge 86 with a notch 88 engagable with the V-shaped lever 80. As best shown in Figure 5I when the V-shaped lever 80 is pivoted in a counterclockwise manner away from the control bail 50, the lever 80 is moved away from the end 82 of the control bail 50 and out of the ~;~5~l(147 notch 88 and the control bail 50 is free to move towards the operator to operate the energizing means 26 and cutter blade 16. Likewise, when the control bail 50 is in a clutch disengaging position away from the operator, -the V-shaped lever 80 can be pivoted toward the control bail 50 and received in the notch 88 to prevent inadvertent movement of the control bail 50 into a cutter blade energizing position.
Biasing means or spring 90 on the shaft 92 plvotally connecting the lever 80 to the upper handle 42 biases the lever 80 toward the notch 88 to facilitate the lever's engaging of the notch 88.
Figures 2 and 3 illustrate another emhodiment of the operating means in combination with a push only lawn mower. A push only lawn mower does not include an upper handle 42, so the operating means is attached, as previously described, to the guiding handle 20 instead of the upper handle 42, with one exception. The means providing for pivotal movement of the control bail 50 relative to the guiding handle 20 includes brackets 90 mounted on the guiding handle 20, and the control bail 50 is pivotally attached to the brackets 90 by suitable means 32 located above the guiding handle 20.
The embodiment illustrated in Figures 2 and 3 could also be used on a self-propelled lawn mower which uses self-propelling control means not including a movable upper handle.
~.,25~047 Various of the ~eatures of the invention are set forth in the following claims.
LAWN MOWER DEAD ~AN CONTROL
RELATED APPLICATION
This application is a division of Canadian Application Serial No. 435,967 filed Sept. 2, 1983.
BACKGROUND
This invention relates to dead man control arrangements Eor both push and self-propelled lawn mowers. Attention is direc-ted to the U.S. Hurd Patent No. 4,335,566 which discloses a single control member for actuating a clutch drive and mower propelling means, unlike the invention disclosed herein.
Attention is directed to Canadian Patent 1,169,256, issued June 19, 1984, which is directed to energizing means including an electric switch.
SUMMARY OF THE INVENTION
- The invention provides a lawn mower comprising a housing, a plurality of wheels supporting the housing for travel over the ground, a prime mover supported by the housing, a cutter blade, clutch means connected to the cutter blade, a handle connected to the housing, a control handle movably mounted on the handle, linkage means connected to the control handle, to the primer mover, and to one of the wheels for selectively propelling the housing along the ground in response to movement of the ~L~25~47 control handle, a control element rnovably mounted on the control handle, and additional linkage means connected to the control element, to the prime mover, and to the clutch means for selectively engaginq -the clutch means in response to control element movement to rotate the cutter blade.
The invention also provides a lawn mower comprising a housing, a plurality of wheels supporting the housing for travel over the ground, a prime mover supported by the housing, a cutter blade, clutch means for selectively driving the cutter blade by the prime mover, a handle connected to the housing, a control handle movably mounted on the handle, linkage means connected to the control handle, to the prime mover, and to one of the wheels for selectively propelling the housing along the ground in response to movement of the control handle, a control element movably mounted on the control handle, additional linkage means connecting the control element to the clutch means for operational control of the the clutch means in response to control element movement, which control element includes a notch near the mounting of the control element on the control handle, and lock lever means for preve:nting inadvertent movement of the control element a:nd comprising a V-shaped lever pivotally mounted on the control handle adjacent the notch and pivotal between a position wherein the lever is ~2S~4'7 received in the notch so as to prevent pivotal movement of the control ellement, and a position wherein the lever is out of the notch so as to permit pivotal movement of the control element.
Various of the features and advantages of various embodiments of the invention will become apparent upon reviewing the following drawings, the detailed description and the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a side view of a self-propelled lawn mower including various of the features of the invention.
Figure 2 is a top view partially in section of the upper portion of a guiding handle for a push lawn mower.
Figure 3 is a side view of the upper portion of the guiding handle shown in Figure 2.
Figure 4 is a top view partially in section of the upper portion of a guiding handle portion of the self-propelled lawn mower shown in Figure 1.
Figure 5 is a side view of the upper portion of the guiding handle shown in Figure 4.
Figure 6 is a partial perspective view of a blad~e energizing means.
Before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or carried out in various ways.
Also, it is to be understood that the phraseology and terminology e~ployed herein is for the purposes of description and should not be regarded as limiting.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Shown in the drawings is a lawn mower 10 including a blade housing 12 supporting a prime mover 14 which drives a cutter blade 16. The blade housing 12 is suitably supported for travel over the ground by a plurality of wheels 18 and is guided for travel over the ground by a guiding handle 20. The guiding handle 20 is generaly U-shaped and includes a cross bar 22 at the upper or operator end.
More particularly, the prime mover 14 can be either an internal combustion engine or an electric motor which rotatably drives an output or drive shaft or an alternative drive member 24 including a lower end portion adapted to support and drive the rotary cutter blade 16.
Further included is energizing means 26 for permitting energizing of or delivering of power ~L25~q to a rotary component driven by the engine such as a propelling wheel or the cutter blade 16. In the disclosed construction the energizing means 26 is a clutch and brake means Eor providing a selective driving engagement between the drive shaft 24 and the cutter blade 16 such that the cutter blade 16 can be selectively driven by the drive shaft 24 and such that the driving engagement between the cutter blade 16 and the drive shaft 24 can be disengaged.
The energizing means 26 can also be an electrical switch 27 operable to shut down the prime mover 14, together with a brake 28 operable to brake the cutter blade 16. The blade brake 28 includes a brake arm 29, as shown in Figure 6, which is movable between a blade free position, wherein the cutter blade 16 is free to rotate, and a blade braked position, wherein the brake 28 acts to brake the cutter blade 16. When the brake arm 29 is moved from the blade free position to the blade braked position, the brake arm 29 engages the electric switch 27 which serves to lock out the electrical starter or ground the ignition system to shut off the prime mover.
Where the prime mover 14 is an electric motor, the brake arm 29 engages the switch 27 to disconnect a source of electric potential to the electric motor.
When the brake arm 29 moves back to the blade free position, the prime mover 14 can be either automatically restarted by the disengaging of the switch 27 or manually restarted, depending on the starter system used on the mower lO.
The lawn mower lO further includes means providing for wheel adjustment and driving of the wheels 18 to allow for self-propulsion of the lawn mower lO. To this encl the lawn mower includes means 30 (shown symbolicly in Fig. l) for engaging the wheels 18 of the lawn mower lO. Any suitable means 30 for propelling the lawn mower 10 can be used, an example of which is more particularly described in Shaw U.S. Patent 2,947,132, issued August 2, 1960.
The lawn mower 10 further includes control means for controlling the self-propulsion of the lawn mower. The control means comprises an upper handle 42 capable of limited independent movement relative to the guide handle 20 on the lawn mower 10. The upper handle 42 is generally U-shaped in construction, as shown in Fig. 4, and includes a cross bar 44 connecting two arms 45 and 47, and is rotatably attached to the upper or operator end 22 of the guiding handle 20 by suitable means 49.
The control means also includes linkage means movable in response to pivotal movement of the upper handle 42 for causing the operation of the mower propelling means 30. The linkage means includes a rigid member or link 46 connected to the arm 45 of the upper handle 42 at a position above the ~.;2S~147 point of pivotal attachment 49 of the arm 45 to the guiding handle 20. The link 46 is also operably connected to the mower propelling means 30. Forward movement of the upper handle 42 toward the blade housing 12 (as shown in Fig. 5) moves the link 46 forward and causes the operation of the mower propelling means 30. Rearward movement of the upper handle 42 accordingly causes disengagement of the mower propelling means 30.
The lawn mower further includes operating means for operating the energizing means.
The operating means includes a control or dead man control bail 5n capable of limited independent movement relative to the upper handle 42. The control bail 50 is generally U-shaped and configured so that a cross bar 52 connecting two arms 54 and 56 of the bail 50 is disposed adjacent the cross bar 44 of the upper handle when in a blade de-energized position so the control bail 50 and upper handle 42 can be grasped by an operator simultaneously. The control bail 50 is connected to the upper handle 42 by suitable means 58 providing for pivotal movement of the control bail 50 relative to the upper handle 42.
The operating means further includes means for operating the energizing means 26 by the pivotal movement of the control bail 50.
~L:25~04s~
More particularly, the means includes a flexible membef or bowden wire 60 connected to the control bail 50 adjacent but above the pivotal attachment of the control bail 50 to the upper handle 42. The flexible member 60 is also operably connected to the energizing means 26 to rotate the cutter blade 16 when the flexible member 60 moves rearwardly away from the housing 12 and to de-energize and brake the cutter blade 16 when the flexible member 60 moves forwardly toward the housing 12.
Biasing means are also provided for biasing the flexible member 60 and control bail 50 in the blade de-energized direction. In this embodiment, the biasing means comprises a spring 65, as shown in Fig. 1. A more detailed description of a spring 65 and one energizing means 26 are described in the U.S. Poehlman, Patent 4,322,935, issued April 6, 1982. In the energizing means 26 embodiment shown in Figure 6, the flexible member 60 is operably connected to one side of the brake arm 29 and the spring 65 is connected to the other side of the brake arm 29. In another embodiment, a combination biasing and energizing means 26 can be used, such as the self-biasing clutch and brake means described in the Bent et al U.S. Patent 4,307,558, issued December 29, 1981.
:`' 3LZS~
Means are further provided for restricting a substantial portion of the flexible member 60 to a predetermined path extending along the guiding handle 20. More particularly, the restricting means includes a pulley 70 rotatably attached to the center of the inside of the guiding handle 20 near the control bail 50 along the path of the flexible member 60 between the control bail 50 and the energizing means 26. The flexible member 60 is guided around and under the pulley 70 and held in a slot 71. The rotational path of the pulley 70 and the pivotal path of movement of the control bail 50 are generally vertical and parallel so as to limit the sideways movement of the flexible member 60 between the pulley 70 and the control bail 50.
Means are further provided for permitting the control bail 50 to pivot independently from the upper handle 42, and the upper handle 42 to rotate independently from the control bail 50. More particularly, the means compris~s a guide means or the pulley 70 rotatably attached to the inside of the guiding handle 20 so a periphery 72 of the pulley 7Q
contacts the flexible member 60 and is generally adjacent t:he pivotal attachment of the upper handle 42 to the guiding handle 20. As a result of the location of the pulley 70, when the upper handle 42 is pivotecl the flexible member 60 rotates about a point generally fixed by the periphery 72 of the ~s~
pulley and corresponding to where the upper handle 42 pivots on the guiding handle 20. Since the flexible member 60 only rotates and does not move either toward or away from the energizing means 26, the upper handle 42 can be rotated and the mower propelling means 30 operated independently from the operating means. Since the distance of the attachment of the flexible member 60 to the control bail 50 relative to the pulley 70 and upper handle 42 remains the same even though the upper handle 42 has moved relative to the guiding handle 20, the control bail 50 can be pivoted and the operating means can be operated independently from the mower propelling means 30.
Means are further provided for locking the dead man control or bail 50 so as to prevent inadvertent movement of the control bail 50. More particularly, the means includes a generally V-shaped lever 80 pivotally connected to the center of the inside of the upper handle 42 and adjacent the end 82 of the cont.rol bail 50 and including, as shown in the drawings, an open portion. The end 82 of the control bail 50 includes a plate 84 having a rounded edge 86 with a notch 88 engagable with the V-shaped lever 80. As best shown in Figure 5I when the V-shaped lever 80 is pivoted in a counterclockwise manner away from the control bail 50, the lever 80 is moved away from the end 82 of the control bail 50 and out of the ~;~5~l(147 notch 88 and the control bail 50 is free to move towards the operator to operate the energizing means 26 and cutter blade 16. Likewise, when the control bail 50 is in a clutch disengaging position away from the operator, -the V-shaped lever 80 can be pivoted toward the control bail 50 and received in the notch 88 to prevent inadvertent movement of the control bail 50 into a cutter blade energizing position.
Biasing means or spring 90 on the shaft 92 plvotally connecting the lever 80 to the upper handle 42 biases the lever 80 toward the notch 88 to facilitate the lever's engaging of the notch 88.
Figures 2 and 3 illustrate another emhodiment of the operating means in combination with a push only lawn mower. A push only lawn mower does not include an upper handle 42, so the operating means is attached, as previously described, to the guiding handle 20 instead of the upper handle 42, with one exception. The means providing for pivotal movement of the control bail 50 relative to the guiding handle 20 includes brackets 90 mounted on the guiding handle 20, and the control bail 50 is pivotally attached to the brackets 90 by suitable means 32 located above the guiding handle 20.
The embodiment illustrated in Figures 2 and 3 could also be used on a self-propelled lawn mower which uses self-propelling control means not including a movable upper handle.
~.,25~047 Various of the ~eatures of the invention are set forth in the following claims.
Claims (2)
1. A lawn mower comprising a housing, a plurality of wheels supporting said housing for travel over the ground, a prime mover supported by said housing, a cutter blade, clutch means connected to said cutter blade, a handle connected to said housing, a control handle movably mounted on said handle, linkage means connected to said control handle, to said primer mover, and to one of said wheels for selectively propelling said housing along the ground in response to movement of said control handle, a control element movably mounted on the control handle, and additional linkage means connected to said control element, to said prime mover, and to said clutch means for selectively engaging said clutch means in response to control element movement to rotate said cutter blade.
2. A lawn mower comprising a housing, a plurality of wheels supporting said housing for travel over the ground, a prime mover supported by said housing, a cutter blade, clutch means for selectively driving said cutter blade by said prime mover, a handle connected to said housing, a control handle movably mounted on said handle, linkage means connected to said control handle, to said prime mover, and to one of said wheels for selectively propelling said housing along the ground in response to movement of said control handle, a control element movably mounted on the control handle, additional linkage means connecting said control element to said clutch means for operational control of said clutch means in response to control element movement, said control element including a notch near the mounting of said control element on said control handle, and lock lever means for preventing inadvertent movement of said control element and comprising a V-shaped lever pivotally mounted on said control handle adjacent said notch and pivotal between a position wherein said lever is received in said notch so as to prevent pivotal movement of said control element, and a position wherein said lever is out of said notch so as to permit pivotal movement of said control element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000546970A CA1251047A (en) | 1982-09-30 | 1987-09-15 | Lawn mower dead man control |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/429,060 US4493180A (en) | 1982-09-30 | 1982-09-30 | Lawn mower dead man control |
| US429,060 | 1982-09-30 | ||
| US06/462,624 US4573307A (en) | 1982-09-30 | 1983-01-31 | Lawn mower dead man control |
| US462,624 | 1983-01-31 | ||
| CA000435967A CA1229987A (en) | 1982-09-30 | 1983-09-02 | Lawn mower dead man control |
| CA000546970A CA1251047A (en) | 1982-09-30 | 1987-09-15 | Lawn mower dead man control |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000435967A Division CA1229987A (en) | 1982-09-30 | 1983-09-02 | Lawn mower dead man control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1251047A true CA1251047A (en) | 1989-03-14 |
Family
ID=27167379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000546970A Expired CA1251047A (en) | 1982-09-30 | 1987-09-15 | Lawn mower dead man control |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1251047A (en) |
-
1987
- 1987-09-15 CA CA000546970A patent/CA1251047A/en not_active Expired
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