CA2041557C - Sand trap rake head - Google Patents
Sand trap rake headInfo
- Publication number
- CA2041557C CA2041557C CA 2041557 CA2041557A CA2041557C CA 2041557 C CA2041557 C CA 2041557C CA 2041557 CA2041557 CA 2041557 CA 2041557 A CA2041557 A CA 2041557A CA 2041557 C CA2041557 C CA 2041557C
- Authority
- CA
- Canada
- Prior art keywords
- head
- rake
- plug
- handle
- tines
- 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 - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B1/00—Hand tools
- A01B1/22—Attaching the blades or the like to handles; Interchangeable or adjustable blades
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B1/00—Hand tools
- A01B1/06—Hoes; Hand cultivators
- A01B1/14—Hoes; Hand cultivators with teeth only
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B57/00—Golfing accessories
- A63B57/50—Golfing accessories specially adapted for course maintenance
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Soil Working Implements (AREA)
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
Abstract
A rake head having an elongate hollow body with an aperture in one side of the body. A cylindrical plug extends through the aperture and across the inside of the body where it is anchored to the rake head by a screw. The rake handle is fitted over the plug and held in place with another screw fastening the head, the handle and the plug together. The rake head has a row of tines spaced along the body and projecting from it orthogonally with respect to the handle.
The tines are each rhombic in profile, with long diagonals aligned transversely of the body and short diagonals substantially perpendicular to the long diagonal. This produces a reduced drag compared with cylindrical or other rounded tines. The rake head has an octagonal profile with a trailing face adjacent the tines oriented at an obtuse angle with respect to the tines.
The tines are each rhombic in profile, with long diagonals aligned transversely of the body and short diagonals substantially perpendicular to the long diagonal. This produces a reduced drag compared with cylindrical or other rounded tines. The rake head has an octagonal profile with a trailing face adjacent the tines oriented at an obtuse angle with respect to the tines.
Description
204~557 SAND TRAP RAKE HEAD
The present invention relates to rake heads and more particularly to sand trap rake heads and rakes incorporating the heads.
On a golf course, sand traps are often placed around the greens to create a challenge for players. It is proper etiquette for a player to groom a sand trap after playing a ball out of the trap. This is usually done with a rake supplied by the course.
One recent proposal for such a rake has a hollow, plastic head with an attached handle. A rake with a head of this type is described in Canadian patent 1 260 309 issued 26 August 1989 to John L. Saksun. The head is of cylindrical shape, with domed ends and round, tapered tines. According to the patent, the rake head is blow molded from a thermoplastic material. In order to attach a handle to the head, the head is moulded with two opposed internal bosses, which, after moulding, are cut away at the base. The handle can then be fitted through the resultant bore. The moulding process leaves a hole in one end of the body that is closed with a plug.
The present invention aims at certain improvements in and departures from rakes and rake heads of this general type.
According to one aspect of the present invention there is provided a rake head comprising an elongate hollow body, an aperture in one side of the body, a plug extending through the aperture to an opposite side of the body, the plug having a cross sectional size smaller than the aperture and fastening means securing the plug to the opposite side of the body.
A handle may be fitted onto the plug, through the aperture and fastened in placed.
With this handle mounting arrangement, it is possible to mould the head as a completely hollow head, without internal support bosses and without further machining after moulding. The opening resulting from the moulding process is the handle aperture, so that no additional plug is required.
For a plug fastener, i~ is oonYenient to use a con~entional wood screw through the head into the end of the plug. When the handle is mounted, a second screw through the head and the handle, into the plug is sufficient to hold it in place.
.~
s -,~
20~155~
According to a further aspect of the present invention there is provided a rake head comprising:
an elongate hollow head;
a handle projecting from the head;
a row of tines projecting from the head, orthogonally to the handle; and a flat surface along the head on a side of the tines opposite the handle and arranged at an obtuse angle to the tines.
The flat surface is preferably disposed at an angle in the range of 120 to 130, most preferably at 126.5 to the tines. The surface thus oriented lies either flat on the sand sl~rface behind the tines or slightly elevated above ~t~e sand, when in use. This minimizes drag of the rake head as it is drawn through the sand and ensures a good `~floating~
action of the rake head on the sand. Preferably, the surface on the other side of the tine is oriented at a similar angle so that it is almost vertical in use, thus contributing minimal resistance to rake movement.
In the accompanying drawings which illustrate an exemplary embodiment of the present invention:
Figure 1 is an isometric representation of a rake according to the present invention;
Figure 2 is an exploded isometric of the rake;
Figure 3 is an end elevation of the rake head;
Figure 4 is a bottom view of the rake head;
Figure 5 is a front view of the rake head;
Figure 6 is a cross section along line 6-6 of Figure 5; and Figure 7 is an end view of the plug.
Referring to the accompanying drawings, there is illustrated a sand trap rake 10 having an elongate head 12 and a handle 14. The head is a hollow, thermoplastic material element formed by blow moulding. The head has a flat bottom wall 16 carrying a row of tines 18 that project from the head orthogonally to the handle 14. The head has a flat trailing wall 20 on the side of the head opposite the handle. The wall 20 extends from the trailing edge of the bottom wall at an obtuse angle to the tines. The angle in this embodiment is 126.5.
The head has a flat leading wall 22 on a handle side of the tines that slopes away from the bottom wall 16 at the same angle as trailing wall 20. At their edges opposite the bottom wall 16, the trailing wall 20 and leading wall 22 meet parallel, flat, back and front walls 24 and 26 respectively.
These walls are oriented parallel to the tines. The hollow head is completed with a flat upper trailing wall 28 and a flat upper leading wall 30 converging towards one another from the back and front walls 24 and 26, and a flat top wall 32 parallel to bottom face 16 joining the upper walls 28 and 30. The complete head is an irregular octagon in end profile.
In the centre of the front face 26 is a circular opening 34 surrounded by an external boss 36. The boss is braced by two gussets 38 projecting towards the ends of the head and a lug 40 on the tine side of the boss.
As illustrated most particularly in Figure 4, each of the tines is generally rhombic in shape with a short diagonal 42 aligned from end to end of the rake head and a long diagonal transverse to the head and perpendicular to the short diagonal. The edges of the tines at the ends of the long diagonals are rounded. As illustrated in Figure 3, the ends of the tines are also rounded.
A plug 50 is used to secure the handle 14 to the rake head 12. The plug has a cylindrical plug body 52 and an enlarged plug head 54. The head has two chamfers 56 formed diametrically opposed positions. The head is dimensioned to fit through the opening 34 in the rake head and to sit against the inside of the back wall 24, with the chamfers on the head mating with adjacent portions of the trailing wall 20 the upper trailing wall 28. When the plug is seated in this way, it is held in place against rotation and properly oriented, with the plug body 52 centered in the opening 34.
A bore 58 in the head end of the plug accomodates a wood screw 60 through the side of the head body opposite the handle to secure the plug to the head. With the plug so 204~557 secured, the tubular handle 14 is pushed over the plug, through the opening 34 until it sits on the plug head 54.
The lug 40 has a bore 62 aligned with a transverse bore 64 in the plug. A screw 66 is driven through those aligned bores and through the handle to secure the head, the handle and the plug together.
The head configured in this way is simply manufactured using a blow moulding technique. The handle opening in the head is that produced by the moulding process.
This eliminates after moulding machining of the head and the plugging of extraneous openings. The plug is itself a moulded part that is simply fitted into the head and held in place using a screw 60. Similarly, the handle is a simple tubular element that will slide onto the plug and be held in place by the second wood screw 66. This assembly process is extremely simple and effective.
In use of the rake it has been found that the rhombic cross section of the tines produces a very smooth grooming action on the sand. The rake with the rhombic tines is easy to draw through the sand than with most conventional rounded tines.
The octagonal profile of the rake head has also been found to contribute to the ease of use. The orientation of the trailing face with respect to the tines positions that face flush on the sand surface to provide a large floating surface supporting the rake head for floating action over the 204155~
-trap sand. The leading face on the opposite side is oriented almost vertically so that it does not contribute to drag of the rake either through friction on the sand surface or through accumulation of sand in front of the rake.
While one embodiment of the invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention, incorporating one or more of the described features of the rake. The invention is to be considered limited solely by the scope of the appended claims.
The present invention relates to rake heads and more particularly to sand trap rake heads and rakes incorporating the heads.
On a golf course, sand traps are often placed around the greens to create a challenge for players. It is proper etiquette for a player to groom a sand trap after playing a ball out of the trap. This is usually done with a rake supplied by the course.
One recent proposal for such a rake has a hollow, plastic head with an attached handle. A rake with a head of this type is described in Canadian patent 1 260 309 issued 26 August 1989 to John L. Saksun. The head is of cylindrical shape, with domed ends and round, tapered tines. According to the patent, the rake head is blow molded from a thermoplastic material. In order to attach a handle to the head, the head is moulded with two opposed internal bosses, which, after moulding, are cut away at the base. The handle can then be fitted through the resultant bore. The moulding process leaves a hole in one end of the body that is closed with a plug.
The present invention aims at certain improvements in and departures from rakes and rake heads of this general type.
According to one aspect of the present invention there is provided a rake head comprising an elongate hollow body, an aperture in one side of the body, a plug extending through the aperture to an opposite side of the body, the plug having a cross sectional size smaller than the aperture and fastening means securing the plug to the opposite side of the body.
A handle may be fitted onto the plug, through the aperture and fastened in placed.
With this handle mounting arrangement, it is possible to mould the head as a completely hollow head, without internal support bosses and without further machining after moulding. The opening resulting from the moulding process is the handle aperture, so that no additional plug is required.
For a plug fastener, i~ is oonYenient to use a con~entional wood screw through the head into the end of the plug. When the handle is mounted, a second screw through the head and the handle, into the plug is sufficient to hold it in place.
.~
s -,~
20~155~
According to a further aspect of the present invention there is provided a rake head comprising:
an elongate hollow head;
a handle projecting from the head;
a row of tines projecting from the head, orthogonally to the handle; and a flat surface along the head on a side of the tines opposite the handle and arranged at an obtuse angle to the tines.
The flat surface is preferably disposed at an angle in the range of 120 to 130, most preferably at 126.5 to the tines. The surface thus oriented lies either flat on the sand sl~rface behind the tines or slightly elevated above ~t~e sand, when in use. This minimizes drag of the rake head as it is drawn through the sand and ensures a good `~floating~
action of the rake head on the sand. Preferably, the surface on the other side of the tine is oriented at a similar angle so that it is almost vertical in use, thus contributing minimal resistance to rake movement.
In the accompanying drawings which illustrate an exemplary embodiment of the present invention:
Figure 1 is an isometric representation of a rake according to the present invention;
Figure 2 is an exploded isometric of the rake;
Figure 3 is an end elevation of the rake head;
Figure 4 is a bottom view of the rake head;
Figure 5 is a front view of the rake head;
Figure 6 is a cross section along line 6-6 of Figure 5; and Figure 7 is an end view of the plug.
Referring to the accompanying drawings, there is illustrated a sand trap rake 10 having an elongate head 12 and a handle 14. The head is a hollow, thermoplastic material element formed by blow moulding. The head has a flat bottom wall 16 carrying a row of tines 18 that project from the head orthogonally to the handle 14. The head has a flat trailing wall 20 on the side of the head opposite the handle. The wall 20 extends from the trailing edge of the bottom wall at an obtuse angle to the tines. The angle in this embodiment is 126.5.
The head has a flat leading wall 22 on a handle side of the tines that slopes away from the bottom wall 16 at the same angle as trailing wall 20. At their edges opposite the bottom wall 16, the trailing wall 20 and leading wall 22 meet parallel, flat, back and front walls 24 and 26 respectively.
These walls are oriented parallel to the tines. The hollow head is completed with a flat upper trailing wall 28 and a flat upper leading wall 30 converging towards one another from the back and front walls 24 and 26, and a flat top wall 32 parallel to bottom face 16 joining the upper walls 28 and 30. The complete head is an irregular octagon in end profile.
In the centre of the front face 26 is a circular opening 34 surrounded by an external boss 36. The boss is braced by two gussets 38 projecting towards the ends of the head and a lug 40 on the tine side of the boss.
As illustrated most particularly in Figure 4, each of the tines is generally rhombic in shape with a short diagonal 42 aligned from end to end of the rake head and a long diagonal transverse to the head and perpendicular to the short diagonal. The edges of the tines at the ends of the long diagonals are rounded. As illustrated in Figure 3, the ends of the tines are also rounded.
A plug 50 is used to secure the handle 14 to the rake head 12. The plug has a cylindrical plug body 52 and an enlarged plug head 54. The head has two chamfers 56 formed diametrically opposed positions. The head is dimensioned to fit through the opening 34 in the rake head and to sit against the inside of the back wall 24, with the chamfers on the head mating with adjacent portions of the trailing wall 20 the upper trailing wall 28. When the plug is seated in this way, it is held in place against rotation and properly oriented, with the plug body 52 centered in the opening 34.
A bore 58 in the head end of the plug accomodates a wood screw 60 through the side of the head body opposite the handle to secure the plug to the head. With the plug so 204~557 secured, the tubular handle 14 is pushed over the plug, through the opening 34 until it sits on the plug head 54.
The lug 40 has a bore 62 aligned with a transverse bore 64 in the plug. A screw 66 is driven through those aligned bores and through the handle to secure the head, the handle and the plug together.
The head configured in this way is simply manufactured using a blow moulding technique. The handle opening in the head is that produced by the moulding process.
This eliminates after moulding machining of the head and the plugging of extraneous openings. The plug is itself a moulded part that is simply fitted into the head and held in place using a screw 60. Similarly, the handle is a simple tubular element that will slide onto the plug and be held in place by the second wood screw 66. This assembly process is extremely simple and effective.
In use of the rake it has been found that the rhombic cross section of the tines produces a very smooth grooming action on the sand. The rake with the rhombic tines is easy to draw through the sand than with most conventional rounded tines.
The octagonal profile of the rake head has also been found to contribute to the ease of use. The orientation of the trailing face with respect to the tines positions that face flush on the sand surface to provide a large floating surface supporting the rake head for floating action over the 204155~
-trap sand. The leading face on the opposite side is oriented almost vertically so that it does not contribute to drag of the rake either through friction on the sand surface or through accumulation of sand in front of the rake.
While one embodiment of the invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention, incorporating one or more of the described features of the rake. The invention is to be considered limited solely by the scope of the appended claims.
Claims
(1) A rake head comprising an elongate hollow body, an aperture in one side of the body, a plug extending through the aperture to an opposite side of the body, the plug having a cross sectional size smaller than the aperture and fastening means securing the plug to the opposite side of the body.
(2) A rake head according to claim 1 wherein the aperture is circular.
(3) A rake head according to claim 2 wherein the plug has a substantially cylindrical body.
(4) A rake head according to claim 3 wherein the plug has an enlarged head abutting the opposite side of the body.
(5) A rake head according to claim 4 wherein the enlarged head of the plug has a non-planar outer surface engaging a mating non-planar surface of the head.
(6) A rake head according to claim 1 wherein the fastener means comprise a screw through the opposite side of the body and into an end of the plug.
(7) A rake comprising:
an elongate, hollow rake head body;
an aperture on one side of the body;
a plug extending through the aperture to an opposite side of the head;
plug fastener means securing the plug to the opposite side of the head;
a handle of tubular form extending into the aperture, over the plug.
(8) A rake head according to claim 7 including handle fastener means securing the handle to the plug.
(9) A rake according to claim 8 wherein the aperture is circular.
(10) A rake according to claim 9 wherein the plug has a substantially cylindrical body.
(11) A rake according to claim 10 wherein the plug has an enlarged head in engagement with the opposite side of the head.
(12) A rake according to claim 11 wherein the enlarged head of the plug has non-planar end surface engaging a mating non-planar surface of the body.
(13) A rake according to claim 7 wherein the plug fastener means comprise a screw through the opposite side of the head and into an end of the plug.
(14) A rake according to claim 8 wherein the handle fastener means comprise a screw extending through the head and the handle into the plug.
(15) A rake according to any one of claims 7 through 14 wherein the head is moulded thermoplastic.
(16) A rake head comprising:
an elongate hollow head;
a handle projecting from the head;
a row of tines projecting from the head, orthogonally to the handle; and a flat surface along the head on a side of the tines opposite the handle and arranged at an obtuse angle to the tines.
(17) A rake head according to claim 16 wherein the angle is in the range of 120° to 130°.
(18) A rake head according to claim 17 wherein the angle is substantially 126.5°.
(2) A rake head according to claim 1 wherein the aperture is circular.
(3) A rake head according to claim 2 wherein the plug has a substantially cylindrical body.
(4) A rake head according to claim 3 wherein the plug has an enlarged head abutting the opposite side of the body.
(5) A rake head according to claim 4 wherein the enlarged head of the plug has a non-planar outer surface engaging a mating non-planar surface of the head.
(6) A rake head according to claim 1 wherein the fastener means comprise a screw through the opposite side of the body and into an end of the plug.
(7) A rake comprising:
an elongate, hollow rake head body;
an aperture on one side of the body;
a plug extending through the aperture to an opposite side of the head;
plug fastener means securing the plug to the opposite side of the head;
a handle of tubular form extending into the aperture, over the plug.
(8) A rake head according to claim 7 including handle fastener means securing the handle to the plug.
(9) A rake according to claim 8 wherein the aperture is circular.
(10) A rake according to claim 9 wherein the plug has a substantially cylindrical body.
(11) A rake according to claim 10 wherein the plug has an enlarged head in engagement with the opposite side of the head.
(12) A rake according to claim 11 wherein the enlarged head of the plug has non-planar end surface engaging a mating non-planar surface of the body.
(13) A rake according to claim 7 wherein the plug fastener means comprise a screw through the opposite side of the head and into an end of the plug.
(14) A rake according to claim 8 wherein the handle fastener means comprise a screw extending through the head and the handle into the plug.
(15) A rake according to any one of claims 7 through 14 wherein the head is moulded thermoplastic.
(16) A rake head comprising:
an elongate hollow head;
a handle projecting from the head;
a row of tines projecting from the head, orthogonally to the handle; and a flat surface along the head on a side of the tines opposite the handle and arranged at an obtuse angle to the tines.
(17) A rake head according to claim 16 wherein the angle is in the range of 120° to 130°.
(18) A rake head according to claim 17 wherein the angle is substantially 126.5°.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2041557 CA2041557C (en) | 1991-04-30 | 1991-04-30 | Sand trap rake head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2041557 CA2041557C (en) | 1991-04-30 | 1991-04-30 | Sand trap rake head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2041557A1 CA2041557A1 (en) | 1992-10-31 |
| CA2041557C true CA2041557C (en) | 1994-05-17 |
Family
ID=4147517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2041557 Expired - Fee Related CA2041557C (en) | 1991-04-30 | 1991-04-30 | Sand trap rake head |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2041557C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997039614A1 (en) * | 1996-04-25 | 1997-10-30 | Binson Roth L | Aerator |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11950535B2 (en) * | 2020-12-18 | 2024-04-09 | Janette Miller | Raking device and method |
-
1991
- 1991-04-30 CA CA 2041557 patent/CA2041557C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997039614A1 (en) * | 1996-04-25 | 1997-10-30 | Binson Roth L | Aerator |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2041557A1 (en) | 1992-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |