ROLLER ASSEMBLY FOR FLOATING WATERCRAFT PORT
One example provides a roller assembly for conveying a watercraft on a floating drive-on watercraft port. The roller assembly includes an axle, a center roller disposed on the axle, and a pair of shoulder rollers disposed on the axle, one shoulder roller disposed on each side of the center roller, the center roller and each shoulder roller free to spin independently from one another about the axle. Each shoulder roller includes an outer sidewall facing away from the center roller, and an inner sidewall facing the roller, a diameter of the shoulder roller at the outer sidewall being greater than a diameter of the shoulder roller at the inner sidewall such that an outer circumferential surface of the shoulder roller is downwardly angled from the outer sidewall toward the center roller.
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This application is a non-provisional of U.S. Patent Application Ser. No. 63/073,709, filed Sep. 2, 2020, which is incorporated herein by reference.
BACKGROUNDFloating watercraft ports provide easy drive-on docking and out-of-water storage of watercraft, including personal watercraft and boats of various hull-types. Such floating watercraft ports typically include a recessed cradle formed in an upper surface of the port, and a number of rollers to receive and guide a hull of the watercraft along the cradle during entry onto and exit from the floating port. As owners purchase different watercraft, and watercraft hull designs change over time, it is advantageous for floating drive-on ports to be able to accommodate various hull sizes and shapes.
SUMMARYOne example provides a roller assembly for conveying a watercraft on a floating drive-on watercraft port. The roller assembly includes an axle, a center roller disposed on the axle, and a pair of shoulder rollers disposed on the axle, one shoulder roller disposed on each side of the center roller, the center roller and each shoulder roller free to spin independently from one another about the axle. Each shoulder roller includes an outer sidewall facing away from the center roller, and an inner sidewall facing the center roller, a diameter of the shoulder roller at the outer sidewall being greater than a diameter of the shoulder roller at the inner sidewall such that an outer circumferential surface of the shoulder roller is downwardly angled from the outer sidewall toward the center roller.
The accompanying drawings are included to provide a further understanding of embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and together with the description serve to explain principles of embodiments. Other embodiments and many of the intended advantages of embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.
In the following Detailed Description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology, such as “top,” “bottom,” “front,” “back,” “leading,” “trailing,” etc., is used with reference to the orientation of the Figure(s) being described. Because components of embodiments can be positioned in a number of different orientations, the directional terminology is used for purposes of illustration and is in no way limiting. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.
It is to be understood that the features of the various exemplary embodiments described herein may be combined with each other, unless specifically noted otherwise.
With reference to
A top surface 30 of base section 12 and a top surface 32 of tail section 14 together form a top surface 34 of watercraft port 10. A hull depression 36 is molded into top surface 34 and is symmetrical about a longitudinal axis or centerline 38 of watercraft port 10, with hull depression 36 being shaped to receive a hull of a watercraft. In one example, hull depression 36 includes a tapered bow region 40, an entrance region 42, and a center region 44 extending there between, and includes port and starboard sidewalls 46a and 46b which curve upwardly from a central channel 48 toward top surface 34. Port and starboard sidewall 46a and 46b of entrance region 42 are flared outwardly between port and starboard sides 49a and 49b of watercraft port 10, and downwardly towards a bottom surface 35 so as to form a funnel-like ramp which directs a watercraft hull upwardly along centerline 38 toward center region 44 of hull depression 36.
In one example, a number of recessed roller pockets 50 are formed in port and starboard sidewalls 49a and 49b of hull depression 36 along centerline 38 between bow region 40 and entrance region 42. In one example, opposing rows 52a, 52b and 54a, 54b of recessed roller pockets 50 are symmetrically disposed along opposite sides of central channel 48 of hull depression 36 at different lateral distances (port and starboard) from centerline 38. In one example, a series of wobble wheels 60, which will be described in greater detail below, are symmetrically mounted within roller pockets 50 on opposing sides of enteral channel 48 to form guide tracks to engage and direct a boat hull along centerline 36 while on/off-loading a watercraft to/from watercraft port 10. In one example, as will be described in greater detail below, an axle of wobble wheel 60 is mounted within axle sockets 51a and 51b on opposing sides of each roller pocket 50 (see
An entrance roller 70 is mounted within an entrance roller pocket 68 disposed at a base of tapered mouth 28 of entrance region 42. In one example, as will be described in greater detail below, the entrance roller comprises a bowtie roller 70, in accordance with the present disclosure, which serves as a both as a shock absorber to lessen impact to both watercraft port 10 and a bow of a watercraft upon initial contact during docking, and to direct the bow of a watercraft toward centerline 38. In one example, as will be described in greater detail below, an axle of bowtie roller 70 is mounted within axle sockets 69a and 69b of roller pocket 68 (see
In one example, as illustrated by
In one example, rim 80 and tire 90 each comprise single-piece, molded copolymer materials, such as thermoplastic elastomers (TPE) and thermoplastic rubbers (TPR), for example. In one example, tire 90 is over-molded onto rim 80. With reference to
With reference to
The tapered shape of central bore 84 allows wobble wheel 60 to “wobble” or articulate from side-to-side on axle 98 as wheel 60 freely rotates about axle 98 when engaging a hull of a watercraft being driven onto or off of watercraft port 10. By allowing wobble wheels 60 to rotate from side-to-side, wobble wheels 60 are able to adjust to the position and size of the hull, and are thereby better able to maintain alignment of the hull with centerline 36, and are better able to maintain a broad surface contact with the hull so as to avoid damage thereto. In one example, as illustrated, the surface of tire 90 is crowned (has a radius) so as to maintain broad surface contact with a watercraft hull at different angles.
With reference to
In one example, rim 122 and tire 130 of shoulder roller 120 each comprise single-piece, molded copolymer materials, such as thermoplastic elastomers (TPE) and thermoplastic rubbers (TPR), for example. In one example, tire 130 is over-molded onto previously molded rim 120. With reference to
In one example, rim 190 and tire 200 of center roller 140 each comprise single-piece, molded copolymer materials, such as thermoplastic elastomers (TPE) and thermoplastic rubbers (TPR), for example. In one example, tire 200 is over-molded onto previously molded rim 190. With reference to
With reference to
As described above, shoulder rollers 120a, 120b and center roller 140 each spin independently about axle 160. When driving a watercraft onto watercraft port 10, tapered mouth 28 of entrance section 14 directs a bow of the watercraft to bowtie (entrance) roller 70. Upon initial contact, openings 180 within tire 130 of shoulder rollers 120a and 120b, through-holes 202 extending through tire 200 of center roller 140, and the elastic characteristics of the material from which tires 130 and 200 are formed, absorb a portion of kinetic energy of the watercraft rather than transferring such kinetic energy into the watercraft port 10 and the watercraft hull, thereby reducing a “jarring” effect of initial contact. As the watercraft is driven onto watercraft port 10, the independent spinning of each roller, and the downward angle of each shoulder roller 120a, 120b toward center roller 140 cause the watercraft hull to self-align with the longitudinal centerline 36 of watercraft port 10. Similarly, bowtie roller 70 functions to assist in maintain central alignment of a watercraft hull when the watercraft is being driven off of watercraft port 10. As described above, center rollers 140 of different widths may be employed to adjust an overall width of bowtie roller 170 to accommodate watercraft hulls of different widths.
Although specific embodiments have been illustrated and described herein, it will be appreciated by those of ordinary skill in the art that a variety of alternate and/or equivalent implementations may be substituted for the specific embodiments shown and described herein without departing from the scope of the present invention. This application is intended to cover any adaptations or variations of the specific embodiments discussed herein. Therefore, it is intended that this invention be limited only by the claims and the equivalents thereof
Claims
1. A roller assembly for conveying a watercraft on a floating drive-on watercraft port, comprising:
- an axle;
- a center roller disposed on the axle; and
- a pair of shoulder rollers disposed on the axle, one shoulder roller disposed on each side of the center roller, the center roller and each shoulder roller free to spin independently from one another about the axle, each shoulder roller having:
- an outer sidewall facing away from the center roller; and
- an inner sidewall facing the roller, a diameter of the shoulder roller at the outer sidewall being greater than a diameter of the shoulder roller at the outer sidewall such that an outer circumferential surface of the shoulder roller is downwardly angled from the outer sidewall toward the center roller.
2. The roller assembly of claim 1, wherein each shoulder roller includes a cylindrical roller pocket on the inner sidewall which is coaxial with the axle, wherein opposing ends of the center roller are disposed within the cylindrical roller pockets of the pair of shoulder rollers.
3. The roller assembly of claim 1, wherein the diameter at the inner sidewall is equal to a diameter of the center roller.
4. The roller assembly of claim 1, each shoulder roller having:
- an outer portion including the outer sidewall; and
- an inner portion including the inner sidewall,
- wherein an outer circumferential surface of the outer portion is angled downwardly from the outer sidewall to a transition with the inner potion at a first angle of depression from a line parallel with a longitudinal axis of the axle, and the inner portion is angled downwardly from the transition with the outer portion to the inner sidewall at a second angle of depression form a line parallel with the longitudinal axis of the axle, where the second angle is greater than the first angle.
5. The roller assembly of claim 1, each shoulder roller including:
- a rim including a center hub defining a bore to receive the axle; and
- a tire disposed about a circumferential surface of the rim, the tire including a plurality of openings extending partially through the tire from the outer sidewall toward the inner sidewall.
6. The roller assembly of claim 5, wherein a portion of the tire corresponding to the outer portion of each shoulder roller including a tread configured to shed water.
7. The roller assembly of claim 1, the center roller comprising:
- a rim defining a bore to receive the axle; and
- a tire disposed about a circumferential surface of the rim, the tire including a plurality of through-holes extending through the tire between opposing sidewalls.
8. The roller assembly of claim 1, the center roller and each shoulder roller comprising molded copolymer materials.
9. A floating watercraft port comprising:
- at least one floating dock section including: a first end; an opposing second end; and an upper surface including a hull depression formed therein extending symmetrically about a longitudinal axis of the dock section between the first and second ends, and
- a wheel assembly disposed at the upper surface at the second end of the dock section for conveying a watercraft onto the dock section along the longitudinal axis, the wheel assembly comprising: an axle defining an axis of rotation orthogonal to the longitudinal axis; a center roller disposed on the axle and centered on the longitudinal axis; and a pair of shoulder rollers disposed on the axle, one shoulder roller disposed on each side of the center roller, the center roller and each shoulder roller free to spin independently from one another about the axle, each shoulder roller having: an outer sidewall facing away from the center roller; and an inner sidewall facing the roller, a diameter of the shoulder roller at the outer sidewall being greater than a diameter of the shoulder roller at the inner sidewall such that an outer circumferential surface of the shoulder roller is downwardly angled from the outer sidewall toward the center roller.
10. The floating watercraft port of claim 9, including a recessed pocket extending into the upper surface, the wheel assembly disposed within the pocket
11. The floating watercraft port of claim 9, wherein the diameter at the inner sidewall is equal to a diameter of the center roller.
12. The floating watercraft port of claim 9, each shoulder roller comprising:
- an outer portion including the outer sidewall; and
- an inner portion including the inner sidewall,
- wherein an outer circumferential surface of the outer portion is angled downwardly from the outer sidewall to a transition with the inner potion at a first angle of depression from a line parallel with a longitudinal axis of the axle, and the inner portion is angled downwardly from the transition with the outer portion to the inner sidewall at a second angle of depression form a line parallel with the longitudinal axis of the axle, where the second angle is greater than the first angle.
13. The floating watercraft port of claim 9, each shoulder roller comprising:
- a rim including a center hub defining a bore to receive the axle; and
- a tire disposed about a circumferential surface of the rim, the tire including a plurality of openings extending partially through the tire from the outer sidewall toward the inner sidewall.
14. The floating watercraft port of claim 13, a portion of the tire corresponding to the outer portion of each shoulder roller including a tread configured to shed water.
15. The floating watercraft port of claim 9, the center roller comprising:
- a rim defining a bore to receive the axle; and
- a tire disposed about a circumferential surface of the rim, the tire including a plurality of through-holes extending through the tire between opposing sidewalls.
16. The roller assembly of claim 9, the center roller and each shoulder roller comprising molded copolymer materials.
17. A wheel assembly for conveying a watercraft on a floating drive-on watercraft port, comprising:
- an axle;
- a cylindrical center roller having a first diameter disposed on the axle; and
- a pair of shoulder rollers disposed on the axle at opposing ends of the center roller, each shoulder roller comprising: an inner sidewall with a diameter equal to the first diameter disposed adjacent to the center roller; and an outer sidewall opposite the center roller with a second diameter greater than the first diameter such that an outer circumferential surface of the shoulder roller angles downwardly from the outer sidewall to the inner sidewall.
18. The wheel assembly of claim 17, each shoulder roller comprising:
- an inner portion including the inner sidewall; and
- an outer portion including the outer sidewall;
- wherein from a reference line parallel with a longitudinal axis of the axle, the outer circumferential surface of the outer portion has a first angle of depression from a line parallel with a longitudinal axis of the axle, and the outer circumferential surface of the inner portion has a second angle of depression, the second angle greater than the first angle.
19. The wheel assembly of claim 17, where each shoulder roller comprises:
- a rim defining a bore through which the axle passes; and
- a tire disposed about the rim, a circumferential surface of the tire forming the outer circumferential surface of the shoulder roller, wherein the tire includes: a plurality openings extending partially through the tire from the outer sidewall toward the inner sidewall, the openings arrayed about an inner circumference of the tire between the rim and the circumferential surface of the tire.
20. The wheel assembly of claim 17, the center roller comprising:
- a rim defining a bore through which the axle passes; and
- a tire disposed about the rim, a circumferential surface of the tire forming an outer circumferential surface of the center roller, wherein the tire includes: a plurality openings extending through the tire between opposing sidewall surfaces.
Type: Application
Filed: Sep 2, 2021
Publication Date: Mar 3, 2022
Applicant: Innovative Outdoor Solutions, Inc. (Maple Lake, MN)
Inventor: Richard G. Johanneck (Maple Lake, MN)
Application Number: 17/465,566