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Патент USA US3019768

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Feb. 6, 1962
J. S. ERKERT
SELF-LOCKING GUNNEL BUMPERS
Filed 001;. 26. 1959
3,019,758
hired ?tates iiatent @
B?l??iih
Patented Felo. 6, 1962
1
2
3,019,758
outer members of the bumper assembly of FIG. 2.
FIG. 5 is a view similar to FIG. 2 but showing an
SELF-LQCKING GUNNEL BUMPERS
James S. Erkert, Rockford, IlL, assignor to National Lock
(10., Rockford, Ill., a corporation of Delaware
Filed Oct. 26, 1959, Ser. No. 848,733
8 Claims. ((21. 114-219)
The present invention relates to an improved bumper
other embodiment of the novel bumper assembly.
FIG. 6 is a View in perspective of a portion of the in
ner connecting or anchoring member of the bumper as
sembly shown in FIG. 5.
Referring more particularly to the disclosure in the
drawing and to the novel illustrative embodiments there
in shown, FIG. 1 discloses a ?berglass boat 10 having
construction and more particularly to a self-locking
bumper assembly adapted for use on the gunnel or side 10 a hull l1 and a deck 12. The deck is generally formed
of a boat. This invention is an improvement on my co
of one piece, as is the hull, and has openings to provide
pending application Serial No. 778,026, ?led December
3, 1958, now Patent 2, 959,146.
An object of the present invention is the provision of
for the desired seating compartments. A bumper assem
bly 13 is applied to the boat 10 and has the dual function
of connecting the deck 12 and bull 11 together and to
a bumper assembly which not only acts as a bumper for 15 protect the boat from damage due to a collision when
a boat but also provides a means to connect sections of
being operated or while docked.
the boat together. With the advent of ?berglass boats,
With respect to FIG. 2, one embodiment of the bump
a boat hull may be fabricated in one piece. If any cowl
er assembly 13 is shown in operative position on the
ing or deck is to be used on the beat, this latter section is
boat 10. As shown, both the hull 11 .and deck 12 ter
separately fabricated and later attached to the hull sec
minate in outwardly extending ?anges 14 and 15, re
tion. The present novel bumper assembly provides novel
spectively. These ?anges have mating holes 16 formed
means for attaching these sections of the boat together.
at intervals along the boat. A substantially U-shaped
Another important object of the invention is the pro
connecting member 17 formed of extruded but relative
vision of a novel attaching means for the separate sec
ly rigid plastic has parallel spaced sides 18 which ter
tions of a ?berglass boat thereby eliminating the use of 25 minate in outwardly diverging or inclined ?anges 19.
adhesives. Plastic adhesives for ?berglass are acceptable
The parallel sides 18 form a channel conformably re
for some purposes, but in the construction of boats which
ceiving the ?anges 14 and 15 and have holes 21 which
must withstand Water and considerable weathering, such
mate or align with holes 16 formed in the ?anges. A
adhesives have not been commercially successful for the
fastening member 22 is inserted through the aligned holes
purpose intended. The present invention eliminates ad
16 and 21 to fasten these parts together. The fastening
hesives by the provision of a novel and positive mechan
member 22 may be a screw, rivet or other like fastener.
ical locking means in the bumper assembly.
The present invention further comprehends a novel
two-piece bumper assembly which combines with out
The outwardly projecting ?anges 19', 19 extend out
at an angle of approximately 60° from the plane of the
parallel sides 18. The ends of these ?anges 19, i9 ter
wardly extending ?anges on the sections of the boat to be 35 minate in channels 23 formed in an extension 24. This
joined. The inner or clamping member is formed of a
extension has a projection extending parallel to the sides
rigid plastic composition and is joined in a novel manner
18 and is adapted to abut the side of the boat 10. At the
to the boat. The outer member or bumper insert is a
other edge of the base 24 is a lip 26 forming with the
relatively soft plastic composition of substantially hemi
projection 25' the channel 23 to receive and grip outer
spherical outer contour which encloses or encompasses 40 projections of an outer bumper member 31. The ends of
the inner member and the ?anges extending from the
the ?anges 14 and 15 are conformably received in the
boat sections.
Thus the novel assembly performs the
dual function of joining the deck and hull of a boat to
gether and provide a bumper to prevent injury to the
boat while docked or during cruising.
The present invention also comprehends the use of ex
truded plastic for the bumper parts. As the ?eld of plas
tics has expanded, extrusion apparatus with specially
shaped extrusion dies have been provided for forming
complicated plastic forms of inde?nite length. The two
parts to the present bumper assembly are formed by
extrusion and then the lengths required for a particular
boat can be accurately out from a length of the extruded
material.
Further objects are to provide a construction of maxi
mum simplicity, e?iciency, economy and ease of assem
bly, and such further objects and advantages as will
later more fully appear and are inherently possessed
thereby.
In the drawing:
FIGURE 1 is a view in perspective of a portion of a
?berglass boat to which the novel bumper assembly is
applied.
channel 27 of the U-shaped portion of member 17.
The ?exible or resilient outer bumper portion 31 is
substantially semicircular in cross section with the por
45 tion 32 abutting the base of the inner anchoring member
17 provided with a ?at exterior surface. Bumper mem
ber 31 at each of its opposite ends terminates in an in
wardly extending or inturned ?ange 33 which is adapted
to be received in an extension 24 of the: inner anchoring
member 17. A lip 34 formed at the edge of each ?ange
33 is conformably received in the channel 23 with the
lip 26 received in the undercut 35. Thus, when joined,
the inner and outer bumper members securely interlock
whereby the outer bumper member is anchored and re
tained in its operative position.
To assemble a boat using this embodiment of bumper,
the hull 11 and deck 12 of the boat are formed and placed
together with longitudinally spaced holes 16 in the ?anges
14 and 15 mating. The U-shaped members 17 are then
80 placed over the ?anges 14 and 15 so that the holes 21 in
the member 17 mate with the holes 16 in the ?anges 14
and 15.
Bolts, screws or other fastening means 22 are
inserted into the holes to lock the members 11, 12 and
FIG. 2 is an enlarged fragmentary perspective view
17 together. A continuous section of anchoring member
on the cross section taken on line 2—~2 of FIG. 1 through 65 17 may be used along one side of the boat. The ?exible
a side of the ?berglass boat and showing the details of
bumper member 31 is then placed over the member 17 so
one embodiment of the novel bumper assembly.
that the resilient ?anges 33 interlock in the channels 23
FIG. 3 is a view in perspective of a portion of the
of the anchoring member 17 and enclose the joint between
inner connecting or anchoring member of the bumper
the hull and the deck and the anchoring means. Since
assembly shown in FIG. 2.
70 member 31 is preferably of soft vinyl plastic, one piece
FIG. 4 is an enlarged fragmentary view in vertical
may su?ice for encompassing the boat as the plastic is
cross section of the inter-lock between the inner and
?exible or resilient so as to readily bend at the corners
8,019,753
3
of the boat. However, two or more pieces may be used,
if desired.
claim 2, in which the outer bumper member is a semi
circular shaped member and said interlocking means in
ond embodiment of the invention is shown. Again, there
cludes inwardly extending ?anges on said member abut
ting the sides of the boat hull‘and deck and each ?ange
is disclosed a boat having a hull 11, a deck 12 and out
extending into a channel in the inner bumper member.
Referring now to FIGS. 5 and 6 of the drawing, a sec
wardly extending ?anges 14 and 15 having aligned holes
16. In this embodiment, the bumper assembly 132 is
formed of two preferably extruded plastic members 41
and 448. Member 41 is a substantially T-shaped element
of relatively rigid plastic having an extension or leg 42
proximately
which ?ts between
a horizontal
the spaced
plane. ?anges
Extension
1.4 and
42 1.5,
has in
longi
tudinally spaced holes d3 which mate with the holes 16 in
the ?anges 14 and 15 to receive fasteners 44 similar to
the attaching means 22 shown in FIG. 2. The outer end
or top 45 of the T-shaped member 4-1 abuts the edges
of the ?anges 14 and 15 with each end provided with an
4. An interlocking bumper assembly for the gunnel of
a ?berglass boat having a hull and a deck portion, and
adjoining ?anges on the exterior of the hull and deck por
tions, a relatively rigid inner bumper anchoring element
terminating in a pair of channels, fastening means for
attaching said inner bumper element to said ?anges, a
relatively soft and ?exible outer bumper element which
encloses the inner bumper element and ?anges on the boat
hull and deck, said outer bumper element being a semi
circular shaped member and having interlocking means
for joining the bumper elements together, comprising in
wardly extending ?anges terminating in lips abutting the
sides of the boat hull and deck and each ?ange extend
inclined lip 46 extending beyond the ?anges and slanting
ing into one of said channels in the inner bumper element,
toward the boat It} forming an undercut surface 47.
Bumper member 48 is of a relatively ?exible or resilient 20 said channels being undercut to receive the lips of the
outer bumper member.
7
plastic and has a substantially semi-circular external sur
face 49 which terminates in edges or gaging appendages
50 that about the hull 11 and deck 12, and spaced tubular
portions 51. The wall 52 of each‘ tubular portion extends
inward from the ends of the rounded surface 49 in sur
face contact with a ?ange 14- or 15 and then extends out
5. .An interlocking bumper assembly for the gunnel
of a ?berglass boat having a hull and a deck portion,
and adjoining ?anges on the exterior of the hull and deck
portions, a relatively rigid inner bumper anchoring ele
53 which interlocks with the undercut surfaces 47 on the
ment comprising a substantially U-shaped member receiv
ing therein the ?anges on the boat hull and deck and
having rearwardly and outwardly diverging arms which
anchoring member 41.
abut the sides of the hull and deck with the end of each
wardly along these ?anges to form an undercut channel
The base 54 of the channel 53
abuts the outer surface or top 45 of the anchoring mem‘ 30 arm provided with a channel, fastening means for attach
ber 41.
The method of assembly is very similar to that required
for the embodiment of FIG. 2 and no further explana
tion appears to be necessary. In each embodiment, the
inner member of the bumper is formed of a rigid plastic
composition and the outer member is formed of a rela
tively soft, ?exible or resilient plastic composition, such
as a vinyl resin. This type of novel bumper assembly
has the labor saving feature in that the ?anges on the
hull and deck will not require a great amount of ?nishing
to provide a tight ?t or a uniform surface for the purpose
of attaching the subsequent gunnel bumper. Further, this
assembly will provide a better clamping action, require
fewerfastening means and no adhesive compound.
Having thus disclosed the invention, I claim:
1. A two-part bumper assembly for the gunnel of a
boat having‘ a hull and a deck and outwardly‘ extending
adjoining ?anges on the exterior of the hull and deck hav
ing mating openings, comprising an inner bumper member
of relatively rigid material and having openings comple
mentary to the openings in said ?anges, connecting means
adapted to pass through said complementary openings to
secure the inner bumper member to said ?anges, an outer
bumper member of relatively soft and ?exible material
and encompassing the inner bumper member and said
?anges, and interlocking means integral with the inner
and outer lbumper members for attaching the members
together.
2. An interlocking bumper assembly for the gunnel
of a ?berglass boat having a hull and a deck portion,
and outwardly extending adjoining ?anges on? the periph
ery of the hull and desk portions, a relatively rigid‘ inner
bumper member having at least one projection extending
parallel to and adjacent said ?anges, said projection and
?anges having complementary openings therein, fastening
means adapted to be inserted into said openings to
attach said inner bumper member to said ?anges, said
inner bumper member having an undercut surface, a
relatively soft and ?exible outer bumper member which
encloses the inner bumper member and ?anges on the‘ 70
boat hull and desk, and interlocking means integral with
the outer bumper member to engage the undercut surface
on the inner bumper member ‘for joining said bumper
members together.
3. An interlocking bumper assembly as set forth in
ing said inner bumper element to said ?anges, a relatively
soft and ?exible outer bumper element which encloses
the inner bumper element and ?anges on the boat hull
and deck, and a part on each of the opposite edges of
the outer bumper element received in said channel to
provide interlocking means for joining the bumper ele
ments together.
>
6. An interlocking bumper assembly for the gunnel of
a ?berglass boat having a hull and a deck portion, and
adjoining ?anges on the exterior of the hull and deck
portions, a relatively rigid inner bumper anchoring ele
ment comprising a T-shaped member having. the leg of
the T-shaped member extending between the ?anges on
the boat hull and deck and the top of the member en
gages the outer edges of the ?anges, fastening means for
attaching said inner bumper element to said ?anges, a
relatively soft and ?exible outer bumper element which
encloses the inner bumper element and ?anges on the
boat hull and deck, and interlocking means on the inner
and outer bumper elements for joining the latter parts
together.
7. An interlockingv bumper assembly as set forth in
claim 6, in which said top of the T-shaped member
terminates in lips each extending beyond an. adjacent
?ange and inclined inwardly to form an undercut sur
face beyond said ?anges for interlocking engagement
with the outer bumper element.
8. An interlocking bumper assembly as set forth in
claim 6, in which the outer bumper element consists of
a semi-circular outer surface whicl'rterminates in lips
abutting the sides of said boat, tubular walls which ex
tend inwardly from said semi-circular surface to adjacent
the ?anges ‘and forming an undercut channel which re
ceives the inner T-shaped member and said ?anges for
interlocking. the inner and outer elements together.
References Cited in the ?le of this patent
UNITED STATES PATENTS
7
2,154,749
2,376,753
2,950,701
Hines _______________ __ Apr. 18, 1939
Bowen ______________ __ May 22, 1945
De Stefani ___________ __ Aug. 30, 1960
525,017
Great Britain ________ .... Aug. 20, 1940
532.304
Great Britain ________ _'__ Ian. 21 1941
FOREIGN PATENTS
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