CA2358666A1 - Single pass lawnmower de-thatching and sweeping blade - Google Patents
Single pass lawnmower de-thatching and sweeping blade Download PDFInfo
- Publication number
- CA2358666A1 CA2358666A1 CA 2358666 CA2358666A CA2358666A1 CA 2358666 A1 CA2358666 A1 CA 2358666A1 CA 2358666 CA2358666 CA 2358666 CA 2358666 A CA2358666 A CA 2358666A CA 2358666 A1 CA2358666 A1 CA 2358666A1
- Authority
- CA
- Canada
- Prior art keywords
- blade
- cndot
- tine
- spring
- bar
- 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.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
- A01D34/73—Cutting apparatus
Abstract
A lawnmower blade that provides for single operation de-thatching and bagging of grass clippings, without necessitating the changing of blades for subsequent collection of grass thatch and clippings in the lawnmower bag.
Description
w~lw PATENT ACT o~C C~Po SEP 2 ~ 2001 2 fi 9 FORM 24 Feeler Reml~ a Chyvd to Title: Single pass lawnmower de-thatching and sweeping/bagging blade.
of grass clippings, without necessitating the c ' ~~g-eftr~e~r subsequent collection of grass Specification: This invention relates to the design of a lawnmower blade that will allow for single pass de-thatching and bagging of lawn clippings. Currently all rotary mower de-thatching devices are separate bars, not actual blades, that must be installed in place of the mower blade when a de-thatching operation is needed. The replacement of the mower blade with the de-thatching bar eliminates the ability of the mower to both de-thatch and sweep up grass clippings in one pass. This necessitating one pass over the lawn with the de-thatching bar followed by the removal and replacement of the bar with the sweeping blade so that another pass over the lawn can be made with the mower blade to sweep up and collect the loosened thatch and clippings.
Prior art has proposed similar types of multi-function lawn mower blades but none of them have been successful because they provided for the de-thatching spring to be located in the flat, horizontal portion of the blade. These types of designs dramatically reduce the sweeping effect of the blade due to the required operating height from the cutting surface due to length and mounting position of the spring tines in the horizontal. The proposed invention provides for one pass de-thatching and bagging of clippings by way of placement of securely mounted, but removable, spring tines located in the blade vane ends providing for much lower operating heights, improving the ability for the blade function as both a lawn de-thatching device and a lawn thatch collection device. And further the proposed invention allows for the tool less removal of the tension mounted spring tines from the blade ends whereby the operator can easily remove and replace worn or broken tines simply by turning the mower on its side and removing the tines by compressing the two tines ends together and sliding the tines out of the spring locating tangs which are located in the blade vanes.
of grass clippings, without necessitating the c ' ~~g-eftr~e~r subsequent collection of grass Specification: This invention relates to the design of a lawnmower blade that will allow for single pass de-thatching and bagging of lawn clippings. Currently all rotary mower de-thatching devices are separate bars, not actual blades, that must be installed in place of the mower blade when a de-thatching operation is needed. The replacement of the mower blade with the de-thatching bar eliminates the ability of the mower to both de-thatch and sweep up grass clippings in one pass. This necessitating one pass over the lawn with the de-thatching bar followed by the removal and replacement of the bar with the sweeping blade so that another pass over the lawn can be made with the mower blade to sweep up and collect the loosened thatch and clippings.
Prior art has proposed similar types of multi-function lawn mower blades but none of them have been successful because they provided for the de-thatching spring to be located in the flat, horizontal portion of the blade. These types of designs dramatically reduce the sweeping effect of the blade due to the required operating height from the cutting surface due to length and mounting position of the spring tines in the horizontal. The proposed invention provides for one pass de-thatching and bagging of clippings by way of placement of securely mounted, but removable, spring tines located in the blade vane ends providing for much lower operating heights, improving the ability for the blade function as both a lawn de-thatching device and a lawn thatch collection device. And further the proposed invention allows for the tool less removal of the tension mounted spring tines from the blade ends whereby the operator can easily remove and replace worn or broken tines simply by turning the mower on its side and removing the tines by compressing the two tines ends together and sliding the tines out of the spring locating tangs which are located in the blade vanes.
Drawings:
Figure 1 shows the end view of blade with spring (a) installed in vane retaining tab (b).
2. Figure 2 shows the front view of the blade with mowing edge (c), spring (a) and tab in vane (b).
Figure 1 shows the end view of blade with spring (a) installed in vane retaining tab (b).
2. Figure 2 shows the front view of the blade with mowing edge (c), spring (a) and tab in vane (b).
3. Figure 3 shows the front view of blade without the spring showing vane tab (a), vane (b) and mowing edge (c).
Claims (7)
1. The combination for use with a powered rotary lawn mower comprising:
A horizontal flat bar having opposed upwardly turned rear edges for one step lawn de-thatching and sweeping and bagging of grass clippings.
.cndot. 1. said horizontal flat bar of the particular length to match appropriately to the radius of the lawn mower deck to allow for maximum sweeping strength, with upward turned rear edge vanes for lawn sweeping and locating of the de-thatching springs and a central means for its mounting on the lower end of the vertical drive shaft of the mower, further comprising of bar end sections having a slotted tang or tab located in the rear portion of the bar end vane, each tang located in behind the front edge and in the sweeping edge of the bar means.
.cndot. 2. two spring type tine devices, being securely attached to the bar means by way of tension, allowing for the secure attachment of the spring tines to the bar ends while also allowing for the on site removal of the spring tines without necessitating the removal of the blade from the mower or the use of any tools to remove the spring tines.
.cndot. each tine being formed of spring wire and consisting of a series of coils, a tang extending horizontally from the first coil forming a loop end to allow for the easy manipulation of the loop and secondly a straight tine end, the working end, extending at a 90 degree angle downwardly from the loop end, allowing for compression of the tine by a joining movement between the loop end and the working end so that the spring tine can be slid onto the blade tang where upon release spring compression forces secure the tines to the specifically notched blade tangs.
.cndot. each downward extended tine being disposed to be pivotally displaced upward and rearward respecting the rotational movement of the blade. Each said tines loop securely engaging the bar and preventing rotation, in either direction on the bar tang, or loss or displacement of the spring tine from the bar means.
.cndot. whereby the spring tine coils function as a spring device to return the tine to its downward position following such displacement.
.cndot. whereby the entire blade means can function as single operation lawn raking/de-thatching and bagging device.
A horizontal flat bar having opposed upwardly turned rear edges for one step lawn de-thatching and sweeping and bagging of grass clippings.
.cndot. 1. said horizontal flat bar of the particular length to match appropriately to the radius of the lawn mower deck to allow for maximum sweeping strength, with upward turned rear edge vanes for lawn sweeping and locating of the de-thatching springs and a central means for its mounting on the lower end of the vertical drive shaft of the mower, further comprising of bar end sections having a slotted tang or tab located in the rear portion of the bar end vane, each tang located in behind the front edge and in the sweeping edge of the bar means.
.cndot. 2. two spring type tine devices, being securely attached to the bar means by way of tension, allowing for the secure attachment of the spring tines to the bar ends while also allowing for the on site removal of the spring tines without necessitating the removal of the blade from the mower or the use of any tools to remove the spring tines.
.cndot. each tine being formed of spring wire and consisting of a series of coils, a tang extending horizontally from the first coil forming a loop end to allow for the easy manipulation of the loop and secondly a straight tine end, the working end, extending at a 90 degree angle downwardly from the loop end, allowing for compression of the tine by a joining movement between the loop end and the working end so that the spring tine can be slid onto the blade tang where upon release spring compression forces secure the tines to the specifically notched blade tangs.
.cndot. each downward extended tine being disposed to be pivotally displaced upward and rearward respecting the rotational movement of the blade. Each said tines loop securely engaging the bar and preventing rotation, in either direction on the bar tang, or loss or displacement of the spring tine from the bar means.
.cndot. whereby the spring tine coils function as a spring device to return the tine to its downward position following such displacement.
.cndot. whereby the entire blade means can function as single operation lawn raking/de-thatching and bagging device.
2. The combination of claim 1 wherein the spring tines are held in place in the blade vane mechanically.
3. The combination of claim 1 wherein the outer end portion of the tang of each device extends radially inward respecting the blade.
4. The combination of claim 1 wherein the axis of the coils is normally straight and each slot and coils are dimensioned such that the series of coils fit snugly over the tang.
5. The combination of claim 1 wherein the radial outer sections of the blade further include upturned trailing edges adapted to cause the air to lift the loosened grass for collection.
6. The combination of a powered rotary lawn mower blade and two securely attached but detachable tine devices, .cndot. said blade comprising a horizontal flat bar having .cndot. 1. end sections, each end section having .cndot. a. a forward edge, .cndot. b. a rearward upturned air-vane, .cndot. c. a U-shaped slot in each blade vane end extending inwardly to the blade center point.
.cndot. said slot positioned behind the cutting edge and located in the air-vane.
.cndot. 2. a central section having mounting means for mounting the blade on the lower end of the drive shaft of the mower; each of said tine devices comprising a length of spring wire including:
.cndot. a. a coiled central section to be mounted on said tabs with first and second end coils, .cndot. b. a straight section extending downwardly from the first coil and forming a tine, and .cndot. c. a horizontally projecting section extending from the second coil and forming a loop which allows for the compression of the spring required for mounting the spring to the blade while also preventing rotation of the device on said tab, the resilience of said coils being such as to allow the tine to be pivotally displaced upwardly and rearwardly beneath the air-vane and to return the tine to its downward position.
.cndot. said slot positioned behind the cutting edge and located in the air-vane.
.cndot. 2. a central section having mounting means for mounting the blade on the lower end of the drive shaft of the mower; each of said tine devices comprising a length of spring wire including:
.cndot. a. a coiled central section to be mounted on said tabs with first and second end coils, .cndot. b. a straight section extending downwardly from the first coil and forming a tine, and .cndot. c. a horizontally projecting section extending from the second coil and forming a loop which allows for the compression of the spring required for mounting the spring to the blade while also preventing rotation of the device on said tab, the resilience of said coils being such as to allow the tine to be pivotally displaced upwardly and rearwardly beneath the air-vane and to return the tine to its downward position.
7. The combination of claim 6 wherein the diameter of the blade matches the diameter of the mower deck to allow for maximum sweeping power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2358666 CA2358666A1 (en) | 2001-09-26 | 2001-09-26 | Single pass lawnmower de-thatching and sweeping blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2358666 CA2358666A1 (en) | 2001-09-26 | 2001-09-26 | Single pass lawnmower de-thatching and sweeping blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2358666A1 true CA2358666A1 (en) | 2003-03-26 |
Family
ID=4170221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2358666 Abandoned CA2358666A1 (en) | 2001-09-26 | 2001-09-26 | Single pass lawnmower de-thatching and sweeping blade |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2358666A1 (en) |
-
2001
- 2001-09-26 CA CA 2358666 patent/CA2358666A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |