U.S. patent number 3,579,996 [Application Number 04/855,623] was granted by the patent office on 1971-05-25 for portable boat ramp.
Invention is credited to Jerry W. Edson.
United States Patent |
3,579,996 |
Edson |
May 25, 1971 |
PORTABLE BOAT RAMP
Abstract
A portable boat ramp for beaching or launching small boats which
eliminates the need to drag such boats across a sandy or rocky
beach with resulting damage to the hull. The ramp may be
conveniently carried manually and is capable of being quickly
adjusted between an extended operative position and a folded
position for storage or transportation. Adjustable bolsters are
provided for engaging hull sides of different configurations and
cooperate with a stabilizing bar which is disposed therebeneath to
provide a stable support for a boat while supported on the
ramp.
Inventors: |
Edson; Jerry W. (Wichita,
KS) |
Family
ID: |
25321710 |
Appl.
No.: |
04/855,623 |
Filed: |
September 5, 1969 |
Current U.S.
Class: |
405/1 |
Current CPC
Class: |
B63C
5/02 (20130101); B63C 2005/022 (20130101) |
Current International
Class: |
B63C
5/00 (20060101); B63C 5/02 (20060101); B63c
001/00 (); B63c 003/12 () |
Field of
Search: |
;61/64--67
;114/44--48 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Bell; Karl J.
Claims
I claim:
1. A portable boat ramp comprising an elongated rigid keel bar
having upwardly offset turned back ends, keel engaging members
supported by said bar ends and adapted to be engaged by a boat
keel, an elongated rigid stabilizer bar, means connecting an
intermediate portion of a stabilizer bar to the upperside of the
intermediate portion of a stabilizer bar to the upperside of the
intermediate portion of the keel bar for positioning the stabilizer
bar in an operative position crosswise of the keel bar or in an
inoperative position lengthwise of the keel bar, elongated rigid
bolsters disposed on and lengthwise of the ends of said stabilizer
bar, means swingably connecting inner ends of the bolsters to the
stabilizing bar for vertical swinging movement, and brace members
adjustably connecting the bolsters to the stabilizer bar for
supporting the bolsters at different angles above the bar ends for
engagement with the sides of the boat hull.
2. A portable boat ramp as in claim 1, said stabilizer bar being of
a length to fit under said turned back ends when the stabilizer bar
is disposed in an inoperative position longitudinally of the keel
bar.
3. A portable boat ramp as in claim 2, said brace members being
swingably connected to the bolsters to assume folded positions
between the bolsters and the stabilizer bar when the bolsters are
disposed in inoperative positions above and substantially parallel
to the stabilizer bar, and said bolsters being of lengths to fit
under the turned back ends of the keel bar in the inoperative
position of the stabilizer bar.
4. A portable boat ramp as in claim 1, and means for securing the
stabilizer bar immovably to the keel bar in either the operative or
inoperative position of the ramp.
5. A portable boat ramp as in claim 4, said means connecting the
stabilizer bar to the keel bar comprising a nut and bolt fastening,
and means cooperating with said nut and bolt fastening for
retaining the stabilizer bar against turning movement relative to
the keel bar in either the operative or inoperative position
thereof.
6. A portable boat ramp as in claim 5, and posts extending between
the keel bar and its turned back ends for bracing said turned back
ends.
7. A portable boat ramp as in claim 1, and reinforcing sill members
secured to and extending along the underside of the keel bar.
Description
BACKGROUND OF THE INVENTION
The present invention constitutes an improvement on my prior U.S.
Pat. No. 3,353,363, issued Nov. 21, 1967.
SUMMARY
It is a primary object of the present invention to provide a
portable boat ramp for use in beaching and launching small boats on
sandy or rocky beaches without the need of dragging the boat across
the beach and which provides a stable support for the boat while on
the ramp.
Another object of the invention is to provide a portable boat ramp
which differs from the boat ramp of my prior U.S. Pat. No.
3,353,363, in that the ramp does not have to be dismantled for
storage or transportation, provides a more compact unit when
stored, and can be readily secured immovably in an extended
position for use.
Another object of the invention is to provide a boat ramp having
adjustable bolsters for engaging hull sides of different
configurations and which in turn are supported by a stabilizing
member to prevent any lateral rocking movement of the boat while
supported on the ramp.
Various other objects and advantages of the invention will
hereinafter become more fully apparent from the following
description of the drawing, illustrating a presently preferred
embodiment thereof, and wherein:
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a fragmentary top plan view showing the boat ramp in an
extended, operative position;
FIG. 2 is an end elevational view thereof, partly in cross section,
looking from the lower toward the upper end of FIG. 1;
FIG. 3 is a side elevational view showing the boat ramp folded;
FIG. 4 is a fragmentary top plan view of the central portion of the
extended boat ramp, with certain of the parts omitted for
clarity;
FIG. 5 is a sectional view, taken substantially along a plane as
indicated by the line 5-5 of FIG. 4;
FIG. 6 is an enlarged fragmentary sectional view, taken
substantially along a plane as indicated by the line 6-6 of FIG.
1;
FIG. 7 is an enlarged cross-sectional view, taken substantially
along a plane as indicated by the line 7-7 of FIG. 2, and
FIG. 8 is an enlarged fragmentary cross-sectional view, taken
substantially along the line 8-8 of FIG. 2.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring more specifically to the drawing, the portable boat ramp
in its entirety and comprising the invention is designated
generally 10 and includes a keel rest, designated generally 11,
comprising an elongated rigid bar 12 having corresponding upturned
portions 13 adjacent each end thereof, as seen in FIGS. 3 and 6,
and inwardly extending corresponding terminal portions 14 which are
disposed above and spaced from the plane of the bar 12.
A keel engaging member 15 is secured on each terminal 14. Said
members 15 are elongated, disposed crosswise of the bar 12, are
rounded in a direction crosswise thereof and are each provided with
an elongated grooved intermediate portion 16. The keel engaging
grooves 16 of the two members 15 are disposed in alignment with one
another, as seen in FIG. 1. An upright post or brace 17 extends
between the bar 12 and each terminal 14 and said posts are spaced
from the adjacent ends of the terminals, as seen in FIGS. 3 and 6.
The bar 12 is preferably reinforced by a pair of transversely
spaced sill members 18 which are secured to its underside and
extend substantially from end to end thereof.
A flat rigid stabilizing bar 19 is disposed above the bar 12, and
the shank of a headed bolt 20 extends downwardly through the bars
19 and 12, is disposed intermediate of the ends of said bars and
carries a wingnut 21, beneath the bar 12 and between the sills 18,
for securing the stabilizing bar 19 to the keel bar 12. The bar 12
is pressed downwardly to form four upwardly facing rounded
depressions 22 which are equally spaced from one another and from
the bolt 20; and the bar 19 is pressed to provide four rounded
bosses 23 on its underside which are sized and located to fit into
the depressions 22, as seen in FIG. 5. Thus, with the stabilizer
bar 19 disposed in its operative position, crosswise of the keel
bar 12, as seen in FIGS. 1 and 2, the nut 21 can be tightened for
retaining the bosses 23 in the depressions 22 for securing the bar
19 immovably to the bar 12.
The bar 19, on either side of and adjacent the bolt 20, is provided
with a pair of transversely spaced aligned and upstanding apertured
lugs 24. A pair of rigid bolster bars 25 are disposed above and
lengthwise of the ends of the stabilizer bar 19 and having
transversely spaced, aligned and apertured lugs 26 extending
downwardly from the inner ends thereof. As best seen in FIG. 7, the
pairs of lugs 26 straddle the lugs 24 and pivot pins 27 extend
through the aligned lugs 24 and 26 for pivotally mounting the bars
25 on the bar 19 for up and down swinging movement. Each pivot
element 27 may carry a spacer sleeve 28 between the lugs 24 engaged
thereby.
Each of the bars 25, near its opposite end, is provided on its
underside with a pair of aligned apertured lugs 29 to receive a pin
30 which extends therethrough. The pin 30 extends through an eye 31
on one end of a rod 32 which has a threaded opposite end portion
33, as seen in FIG. 2. Spacing sleeves 34 are mounted on the pin 30
between the eye 31 and lugs 29, as seen in FIG. 8. The threaded
portion 33 of each rod carries a wingnut 35 which is adjustable
thereon to form a stop by engagement with the upper surface of the
bar 19 when the rod 32 extends through a longitudinally elongated
opening 35, one of which is provided adjacent each end of the bar
19, for supporting the bolster bars 25 in upwardly inclined
operative positions, as seen in FIG. 2. Substantially
hemispherically pads or cushions 36 are secured to the uppersides
of the outer ends of the bars 25. The keel engaging members 15 and
the pads 36 may be formed of rubber, plastic or other similar
cushioning materials.
With the ramp 10 extended, as seen in FIGS. 1 and 2, the keel bar
11 is disposed on the beach perpendicular to the water's edge and
with one end thereof adjacent the water's edge. An end of the keel
37 of a small boat 38, as seen in dotted lines in FIG. 2, is
positioned in the groove 16 of the keel engaging member 15, which
located adjacent the water's edge, as an end of the boat is lifted
and pulled toward the ramp. The boat is then pushed or pulled up
the ramp 10, toward the other keel engaging member 15, with the
weight of the boat supported on said first mentioned keel engaging
member 15. After the preponderance of the weight of the boat has
advanced beyond the keel engaging member 15, engaged by the keel
37, the bow or leading end of the boat is manually supported until
the boat has been advanced up the ramp to a desired extent. The bow
portion of the boat is then lowered so that the keel 37 will engage
the other keel engaging member 15. Transversely aligned portions of
the sides of the hull of the boat 38 will then assume positions
resting on the pads 36. If necessary, the wingnuts 34 can be
adjusted for raising or lowering the bolsters 25 so that most of
the weight of the boat will be supported by said bolsters.
The sills 18 and the bar 12 will sink into the beach surface so
that the ends of the stabilizing bar 19 will rest on the beach and
the lower ends of the rods 32 will be embedded in the beach surface
to retain the ramp immovable. By lifting the bow of the boat to
disengage the keel from the upper member 15 and the hull from the
pads 36, the keel can slide readily down the lower member 15 as the
boat is pushed outwardly for launching the boat from the ramp
10.
When the ramp is not in use, the nut 21 can be loosened slightly
for turning the stabilizer bar to a position lengthwise of the keel
bar, after the rods 32 have been disengaged from the openings 35
and swung inwardly against the undersides of the bars 25.
Stabilizer bar 19 is of a length less than the spacing between the
posts 17 to fit on the bar 12 between said posts, and the bolster
bars 25 do not extend to the ends of the bar 19 and fit under the
extremities of the terminals 14, as seen in FIG. 2. It will be
apparent that in this folded position of the ramp, the bosses 23
will engage the depressions 22 so that when the nut 21 is
tightened, the ramp will be secured in its folded position for
storage or transportation.
Various modifications and changes are contemplated and may be
resorted to without departing from the function or scope of the
invention.
* * * * *