SKATEBOARD TRUCK ASSEMBLY
A skateboard truck assembly comprising a base plate, a hanger, and at least one compressible member interposed there between that utilizes rotation of the hanger to at least partially and temporarily deform the compressible member, thereby creating zones of tension and/or compression within the compressible member and facilitating smooth and efficient motion of the skateboard.
This application is a Continuation Application of co-pending U.S. application Ser. No. 14/663,942, filed Mar. 20, 2015 and titled “Skateboard Truck Assembly,” which is a Continuation Application of U.S. Pat. No. 9,010,777, filed Nov. 3, 2011 and entitled “Skateboard Truck Assembly.” The entirety of the aforementioned applications are incorporated herein by reference.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENTNot applicable.
TECHNICAL FIELDThis invention generally relates to a skateboard truck assembly that utilizes rotational motion to facilitate maneuverability of a skateboard. In another aspect, the invention relates to a skateboard employing one or more inventive truck assemblies.
BACKGROUND OF THE INVENTIONIn addition to securing the wheels of a skateboard to its deck, the skateboard truck assembly plays an important role in the overall maneuverability of the skateboard, including, in particular, the rider's ability to control the direction of the board's travel. Several types of skateboard trucks exist and its ultimate design is subject to significant variation. However, in general, most truck assemblies tend to operate on the basic principle that a change in the rider's position on the board (e.g., through a shift in weight or “pumping” one's legs) can be at least partially translated to a change in the direction of the skateboard's motion. Many conventional truck assemblies, however, exhibit a variety of drawbacks that can adversely impact the operation of the skateboard—both in terms of rider flexibility and performance and, in some cases, rider safety. For example, conventional trucks place an extreme amount of stress on the reverse kingpin, which can oftentimes result in failed or broken parts. This creates a hazardous situation for the rider. In addition, many traditionally-designed skateboard trucks geometrically limit the skateboard's turning ability, which is the method used to slow the skateboard down when riding on uneven or sloped (e.g., mountainous) terrain. Conventional trucks can only exhibit a tighter turning radius when the truck is loosened, which consequently reduces stability, especially at high speeds. This is extremely dangerous, as it can cause “speed wobble,” which can result in severe injury or even death. Thus, a need exists for a robust, yet versatile, skateboard truck design that maximizes the turning ability and performance of the skateboard, while retaining a suitable degree of stability and, ultimately, enhancing both rider control and safety.
BRIEF SUMMARY OF THE INVENTIONOne embodiment of the present invention concerns a skateboard truck assembly comprising a base plate, a hanger, and at least one compressible member. The base plate is configured to be mounted on a skateboard deck and the hanger is configured to at least partially rotate about an axis between a resting position and a turning position. The at least one compressible member is at least partially interposed between the hanger and the base plate, and the rotation of the hanger away from the resting position creates at least one compression zone and at least one tension zone in the compressible member.
Another embodiment of the present invention concerns a skateboard comprising a deck and a pair of truck assemblies coupled to the deck. Each of the truck assemblies comprises a base plate, a kingpin, a hanger, and at least one compressible member. The base plate is configured to be mounted to the deck and the hanger is configured to at least partially rotate about the kingpin between a resting position and a turning position. The at least one compressible member is at least partially interposed between the hanger and the base plate and the rotation of the hanger away from the resting position creates at least one compression zone and at least one tension zone in the compressible member.
Various embodiments of the present invention are described in detail below with reference to the attached drawing figures, wherein:
Referring now to the Figures in more detail, like numerals indicate like parts in all views. Turning initially to
Turning initially to
As shown in
Compressible member 26 can be a compressible structure, such as, for example, a bushing, that is capable of permitting the movement of hanger 24, as will be described in detail shortly. In one embodiment, generally depicted in
Hanger 24 defines an axle 72 for supporting one or more wheel assemblies 40, particularly shown in
As particularly illustrated in
Wheels 42 can be any suitable size and can be selected, at least in part, based on the specific design or desired type of use for skateboard 10. In one embodiment, wheels 42 can be a rounded lip wheel or a square lip wheel and can have a diameter in the range of from about 46 mm to about 56 mm, or from about 48 mm to about 54 mm, while, in other embodiments, wheels 42 can have a diameter in the range of from about 52 mm to about 88 mm, or from about 54 to about 85 mm. In some embodiments, particularly when skateboard 10 comprises a longboard, wheels 42 can have a diameter in the range of from about 60 mm to about 110 mm or from about 65 mm to about 107 mm. The width of wheels 42 can also vary and, in some embodiments, can be in the range of from about 30 mm to about 80 mm or from about 40 mm to about 58 mm. Wheels 42 can be made of any suitable material, including for example, polyurethane or other elastomer, and can have a Shore A hardness (ASTM D-2240) in the range of from 65 to 100, 70 to 95, or 75 to 90.
As shown in
As illustrated in
To facilitate penetration by base plate and hanger protrusions 36, 38, compressible member 26 can define at least two openings, spaced from apart from each other by an offset angle (β), of which at least one opening (e.g., opening 39a) can be configured to receive a base plate protrusion (e.g., base plate protrusion 36b), while at least one of the other openings (e.g., opening 39b) can be configured to receive a hanger protrusion (e.g., hanger protrusion 38b), as particularly illustrated in
Many conventional skateboard trucks utilize a back-and-forth or “rocking” motion of the kingpin and/or truck in order to facilitate motion of the skateboard. In one embodiment of the present invention, truck assembly 20 depicted in
In some embodiments, truck assembly 20 may be configured to rotate in a near frictionless manner, in order to facilitate smooth and efficient turning motion of skateboard 10. In one embodiment, near frictionless operation of truck assembly 20 can be at least partly accomplished by preventing direct contact of base plate 22, compressible member 26, and hanger 24 with one another. For example, in one embodiment, this can be accomplished by creating gaps between base plate 22 and compressible member 26 (shown as gap 87 a in
Turning first to
In operation, hanger 24 can be transitioned between the resting and turning positions respectively shown in
Referring now to
As shown in
The preferred forms of the invention described above are to be used as illustration only, and should not be used in a limiting sense to interpret the scope of the present invention. Obvious modifications to the exemplary one embodiment, set forth above, could be readily made by those skilled in the art without departing from the spirit of the present invention. The inventor hereby state his intent to rely on the Doctrine of Equivalents to determine and assess the reasonably fair scope of the present invention as pertains to any apparatus not materially departing from but outside the literal scope of the invention as set forth in the following claims.
Claims
1. A truck assembly comprising:
- a base plate comprising: a mounting plate, and an angled hanger coupling member extending from the base plate and comprising at least one base plate protrusion extending outwardly from the angled hanger coupling member;
- a hanger comprising: a first surface and a second surface, wherein at least the first surface is configured to face the angled hanger coupling member of the base plate, and at least one hanger protrusion extending outwardly from the first surface of the hanger; at least one base plate spacer adjacent to the angled hanger coupling member; and at least one hanger spacer adjacent to the first surface of the hanger;
- wherein the at least one base plate protrusion and the at least one hanger protrusion are configured to engage at least one compressible member such that a first gap is formed between the at least one compressible member and the angled hanger coupling member by the at least one base plate spacer, and such that a second gap is formed between the at least one compressible member and the first surface of the hanger by the at least one hanger spacer.
2. The assembly of claim 1, wherein when the hanger is rotated away from a resting position, at least one compression zone and at least one tension zone are created about a plane in the at least one compressible member, and further wherein the at least one compression zone and the at least one tension zone cooperatively urge the hanger to return to a resting position.
3. The assembly of claim 2, the at least one base plate spacer and the at least one hanger spacer being configured to maintain the first gap and the second gap when the hanger is rotated away from the resting position.
4. The assembly of claim 2, further comprising a kingpin configured for assembly of the truck assembly, wherein the kingpin orthogonally intersects at least the first surface and/or the second surface of the hanger.
5. The assembly of claim 4, the hanger being configured to be rotated along an axis defined by a longitudinal axis of the kingpin.
6. The assembly of claim 5, the hanger defining therein a kingpin opening configured to receive the kingpin.
7. The assembly of claim 1, the angled hanger coupling member protruding from the mounting plate at an angle in the range of from about 15° to about 75°.
8. The assembly of claim 1, the hanger having a maximum degree of rotation of at least 15°.
9. The assembly of claim 1, the at least one compressible member comprising an elastomer.
10. The assembly of claim 9, the elastomer having a Shore A hardness.
11. The assembly of claim 1, the hanger presenting a pair of opposing axle pins.
12. A hanger comprising:
- a first surface and a second surface, wherein at least the first surface is configured to face an angled hanger coupling member of a base plate; and
- at least one hanger protrusion extending outwardly from the first surface of the hanger, wherein the at least one hanger protrusion is configured to fully penetrate a width of at least one compressible member that is spaced apart from the first surface of the hanger by at least one hanger spacer, such that a gap is created between the at least one compressible member and the first surface of the hanger.
13. The hanger of claim 12, wherein when the hanger is rotated away from a resting position, at least one compression zone and at least one tension zone are created about a plane in the at least one compressible member, and wherein the at least one compression zone and the at least one tension zone cooperatively urge the hanger to return to the resting position.
14. The hanger of claim 12, further comprising a kingpin configured for assembly of a truck assembly comprising the hanger, and wherein the kingpin orthogonally intersects at least the first surface and/or the second surface of the hanger.
15. The hanger of claim 14, the hanger being configured to be rotated along an axis defined by a longitudinal axis of the kingpin.
16. The hanger of claim 12 further comprising a kingpin opening configured to receive a kingpin, the kingpin opening having at least one bearing member for facilitating rotation of the hanger about the kingpin.
17. The hanger of claim 16, the at least one hanger spacer being configured to be interposed directly between the at least one compressible member and at least the first surface of the hanger.
18. A base plate comprising:
- a mounting plate; and
- an angled hanger coupling member extending from the base plate and comprising at least one base plate protrusion extending outwardly from the angled hanger coupling member, wherein the at least one base plate protrusion is configured to penetrate at least half of a width of at least one compressible member that is spaced apart from the angled hanger coupling member by at least one base plate spacer, such that a gap is created between the at least one compressible member and the angled hanger coupling member.
19. The base plate of claim 18, the at least one compressible member comprising an elastomer.
20. The base plate of claim 19, the elastomer having a Shore A hardness.
Type: Application
Filed: Jul 12, 2016
Publication Date: Jan 5, 2017
Inventors: JARED BRADEN (HOLLISTER, MO), ROGER BRADEN (HOLLISTER, MO)
Application Number: 15/207,720