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Oct- 1‘, 1946» ‘
Filéd May 22, 1944
, '
s Sheets-Sheet 1
Oct. 1', 194a. '
‘ 2,408,579
IFiied' Kay 22, 1944
_s sheets-sheet s
Patented Oct. 1‘, 1946
7 ‘Benjamin- F. Randrup, Brisbane, Calif.
Application May 22, 1944, Serial No. 536,811
5 Claims. (01. 9-2)
ing boats.
of Fig. 6;
Fig. 8 is an enlarged detail section showing the
manner in which the end members are secured
An object of my, invention is to provide a fold?
able boat embodying a ‘construction capable of
being readily collapsed and folded intoa compact
5 to the sides of the boat;
Fig. 9 is an enlarged sectional view taken’ on
form for convenience in handling; storage‘ or
Another object of my invention, is
,Fig. 7 is a vsectionalview taken on the line '|—‘!
This invention relates to improvements in fold- ‘ Y
the line 9—9_of Fig. 2;
. ;_
Fig. 10 is an enlarged sectional View taken on
to provide >
a foldable boat having longitudinally disposed
bottom and sidejmemb'ers which'are- articulately
the line Ill-40 of Fig.2.;
connectedalongltheirfcontiguous edges, whereby ‘ “
the line lI-ll of Fig. 2; 1
I 5
~ Fig. 12 is an enlarged side elevation of one of
Fig. 11 isan enlarged sectionalrview taken on
the parts may be readily unfolded from acol
the hinges employed in connecting certain parts
lapsed form into a rigid boat ‘structure wherein
the parts are ?rmly secured in extended positions '
of the boat together and maintaining, them in
and so locked that there is no danger of accidental 15
Fig. 14 is a diagrammatic vplan view showing
a‘number of the boats connected'end to end to
assembled and‘operable form, provides a rigid and
‘a, collapsed or folded gformi
A further object of my invention is to provide
a folding or collapsible :boatgwhich, when in an
Fig. 13 is a sectional View showing the :boat in
considerable 2,0 form a supporting structure for a bridge; and
Fig. 15 is a side elevational view of the con
amount of material and a number of persons may
nected Iboats shown in Fig. 14-.’
be safely carried without likelihood of. damage
or injury from leaks, .capsizing or foundering.
Referring to the drawings, the numerals I and
2 designate two elongated bottom members which
Other and further.‘ objects of my invention will
be pointed out hereinafter, indicatedin; the ap 25 are ?exibly connected together along their ad
jacent longitudinal side edges by an intervening
pended claims, or will be obvious to one skilled
in the art upon an understanding of the present
strip 3 of ‘waterproof fabric, such as canvas. . The
disclosure. For the purpose of this application,
I have elected to show herein certain forms and
bers at their upper‘ sides :by means of nailed, glued,
waterproof strip 3 is secured to the bottom mem
details of a folding boat representativeof my_in 3.0 or otherwise suitably secured battens 4'. Overly;
vention; it is to be understood, however, that the ' ing the strip 3 is a ‘rigid longitudinal member 5.
Secured to andunderlying ‘the strip 3 is a rigid
> embodiment of my invention herein shown. and
longitudinally disposed'member 6 _iwhich is'nor¢
mally engaged at its opposite, side edges by the
described is for the purpose of illustrationonly,
and that therefore it is not to .be regarded as
exhaustive of the variations of theinvention, nor ~ .35 lower inner side edges of- the bottom members
' [l and 2 (seeFig..5). Secured to and underlying
is it to be given an interpretation such as might
the member 6 is'a, lower longitudinally disposed
member 1 which. normally extends" across the
longitudinal space separating 'the inner edges of
the bottom members. The lower member 1 pro.
have the e?ect ‘of limiting the claims short of the
true and most comprehensive scope of the inven
tion in the art.
. _
In the accompanying drawings:
~Fig. 1 is a side elevation of afolding or. col;
lapsible boat embodying the preferred principles
my invention;
Fig.2 is a plan view of the same;
Fig. 3 is an endview of the ‘same;
' I
- vides a support for the inner edges of thebottom
members I and 2 and at the same. time it forms
rigid protecting means fornormally preventing
damage to the'keel area of the boat when land
are made. The bottom'members l. and 2. are
made preferably from ?at ‘panels of ‘plywood or
Fig. 4 is an enlarged sectional view taken on
the line 44-4 of Fig. 1, showing the manner‘in
which the bottom and side members are fastened
other suitable material, and'each is substantially, '
rectangularwinlshape. When the boat is unfolded
' and 'set' up'and the various ‘parts are in assem
bled cooperating positions, the bottom members
vFig. 5 is an enlarged sectional 'v'iéwgtak‘en 'on 50' ‘I and 2 are slightly inclined in opposite directions.
Flexibly connected to the outer‘ edges of the
the line 5-5 of Fig. 2,'showing themanner'in
(bottom members land 2, respectively, are elon
Which the bottom of the boat is constructed;
- Fig. 6 is an enlarged side elevation of one of the,
car looks;
I 1
gated side members 8 and 9. The adjacent edges
of the bottom and side members are connected
together by waterproof strips W of canvas or other
suitable material. The ?exible strips 19 are se
cured to the inner surfaces of the side and bot
tom members by nailed, glued or otherwise suit
ably attached battens H, The side and bottom
the boat alongside one another. Hinged as at
23 to the lower portions of the frame members
members when in unfolded and set up positions
side members 8 and 9. When the boat is being
set up it becomes necessary to exert an inner
20 are horizontal seats 24 which extend across
the interior of the boat and are supported at
their opposite ends by strips 25 secured to the
are arranged so that the lower edge of each side
member rests on its associated bottom member.
pull upon the upper edges of the side members
3 and 9 in order to bring the- side and bottom
The particular battens H which are secured to
the bottom members i and 2 provide abutments 10 members into their proper relative positions as
well as into ?rm engagement with the U-shaped
to prevent the lower edges of the side members
ribs. The preferred means used to accomplish
from engaging with the ?exible strips l6. Such
.this result comprises a number of three-piece
clamps 26 (see Fig. 9) of the kind employing a
side and it still permits the folding of the‘mem 15 principle commonly used in trunk latches to se
cure the lid to the main body. The clamps are
bers one upon another in a most satisfactory
mounted on the upper ends‘of the angular frame
members 20, and each clamp is adapted to engage
Hinged as at 12 to the bottom member v2 is a
with an upwardly disposed member 27 secured to
centrally disposed member (3 (see Fig. 5) which
normally overlies the longitudinal member 5 and 20 the upper edges of the side members 8 and 9,
and by swinging the lever members of the clamps
provides a rigid ?oor piece for protecting the
inwardly, the side members 8 and 9 at their up
?exible connecting strip .3 against damage from
per edges are ‘drawn toward each other and into
The stern and bow of the boat are constructed . ?rm engagement with the frame members 28,
a connecting means for the bottom and side mem-. . . .
hers is well protected from damage from the out
substantially alike and each comprisesa ?exible 25 thereby forming‘ a rigid construction throughout
the length of the boat.
Secured as by a universal hinge '28 (see Fig. 10)
to the longitudinal member 5' at each end of the
boat is a centrally disposed brace 29 which ex
end member it of waterproof material such as
convas which is somewhat rectangular in shape.
The lateral and lower edges of the end members
[4 are secured to the bottom members i and 2
and to the side members 8 and 9 by spaced glued
tends longitudinally to the end panel H.
braces 29 are each normally disposed in a ver
or nailed battens M’ or other suitable means
tic'al plane and an end thereof is secured to the
end panels [6 and IT by a bracket 28' and one 0;‘
the same bolts I8 which normally holds the said
Secured as by universal hinges 15 (see Fig. 11) 35 panels in engaging relationship. Each brace 29
provides a rigid reenforcing structure for an end
to the opposite endsv of the bottom members i
of the boat, and if desired it may serve as a sup
and 2, respectively, are rigid end panels !6 and
port for an outboard motor or other device.
i‘! which are each of su?cient- length to extend
At opposite sides of the boat, on the upper edges
across an end of the boat. When the boat is in
a set up position the end panels it and H are 40 of the side members 8 and 9 are mounted oar
locks 36 which are adapted to drop from an up
lodged at their opposite. ends between the bat
wardly extending position to one wherein they
tens M' which are secured to the side members
are positioned against the said side members (see
8 and 9. (See Fig. 8.) The hinges l5 are so
Fig. '7) . The car locks are each provided with an
constructed and arranged as to permit the end
upper opening for the insertion of an oar and
panels l6 and i"! to ‘be removed from engaging
witha lower opening for the engagement of a
positions between the spaced battens la’ without
bracket 3| which serves as means for securing
detachment from the bottom members i and 2
the oar lock to the side member.
when‘ the boat is to be collapsed and folded. The
At opposite sides of the boat near thetwo ends
end panels I6 and I‘! are normally positioned in
lengthwise engagement with each other. They 50 thereof are arranged four foldable buoyant mem
which will prevent water from entering where
the end members engage with the side and bot
tom members.
provide rigid stiffening members for maintain
bers 32 which are suitably secured to the upper
ing ‘the bottom and side members in their un
folded respective normal positions, and at the
areas ofthe'side members 8 and E3.v (See Figs.2, '
3 and 11.)- Each of' the buoyant members is pref
erably provided with‘ahinged side 33, canvas
same time they maintain the ?exible end mem
ends 33’ and a pivoted’ top 34 which has a hinged
door 35. I vThe side 33 of the buoyantmember is
movably connected at its lower end by a water
proof strip to a side member 9, and a similar hinge
boat is collapsed. When extended across the ends
connection is provided between the topiili and
of the boat; the end panels l6 and H are se
cured together at one or more pointsby bolts I8 ‘60 the side 33 as‘well as between the door '35 and
the side member. The hinged door is provided
or other suitable means.
with a ‘latch 36 for holding the door and the top
Extending across the interior of the boat in
34 in connected relationship. The interior vof
engagement with the side members are pairs of
angular frame members 29, which form rigid " each buoyant member has an air chamber which
U-shaped ribs or frames for maintaining the side 65 is'adapted to provide suitable buoyancy to pre
vent the capsizing of the boat in rough waters.
and bottom members in extended positions. The
bers ‘M in taut, protected positions. The end
panels [6 and ll’ ‘are adapted to fold against‘ the
bottom members I and 2, respectively, when the
tommernbers as by universal hinges 2i ' (see Figs. '
VVhenr folded the door drops downwardlyv against
the sideimember 9, the top-34 drops downwardly
9 and 12) which permitlthe folding of the said
against the inside surface of 33, and the latter
angular frame members are connected to the bot
frame members against vthe bottom members. 70 with the canvas ends 33' tucked inwardly is
positionedin closs proximity to the said mem
The upwardly disposed parts of the frame mem
bers 2B are normally lodged between spaced strips
22 secured to the inside surface of the side mem
bers Band 9.. The lower portions of the frame .
members of each pair extend across the bottom of
As shown in Figs. 14 and 15, the ends of sev
eral boats may be connected as by interlocking
means 31 to provide an elongated supporting
structure for a pontoon bridge. ‘When so con
nected together, the boats provide a semi-rigid
structure capable of supporting a considerable
The universal hinges 15, 2| and 28 are
provided, as shown in Fig; 12, with a plate
looped member 39 on said plate, a pin 40
nected to the looped member, and a second
33, a
4| having an eye or opening Within which the
ally connected to and foldable upon the frame
2.'In' a collapsible boat, a pair of elongated
bottom members ?exibly connected together lon
gitudinally along‘ adjacent side edges, two elon
gated side members ?exibly connected to the ‘
outwardly disposed longitudinal edges of the
bottom members, the side members each being
arranged to fold upon its associated bottom mem
pin is rotatably mounted and held. The free 10 ber, foldable end members pivotally connected
to and foldable upon the bottom “members, the .
movement of the pin 49 with respect to the looped
said end members being arranged in pairs and
member 39, and the free movement of vthe second
each pair being positioned toclose an‘ end of the
plate 4| about the pin 4!) permits the members
boat, rigid frame members connected to and
to which the plates are secured to assume various
positions with respect to one another. Thus the 15 foldable upon the bottom members and normally
interposed between the side members for main
frame members 20, the end members l5 and I‘!
taining them in separated positions, and seats
and the braces 29 are respectively held in a conpivctally connected to the frame members and
I nected position with respect to bottom members
arranged to fold thereupon.
I and 2 and the longitudinal member 5, both when
the boat is in a set up position'and when it is 20 ‘ 3. In a collapsible boat, means for connect
ing an elongated side member to an elongated
bottom member comprising a ?exible strip inter
When the boat is to be collapsed for conven
’ posed between adjacent longitudinal edges of the
ience in carrying, storage or handling, the clamps
side and bottom members, and longitudinally
26 and the bolts l8 are ?rst disconnected, follow
ing which the frame members 20 making up the 25 disposed battens securing the strip to- the side
U‘-shaped ribs, the braces 29 and end panels 15,
and I‘! are folded against the bottom members
i and 2. The buoyant members 32 are collapsed
and bottom members, the battens and ?exible
strip being arranged on the inside of the boat and
one of the battens being positioned to provide
an abutment for the longitudinal edge of the side
and positioned alongside theside members 8 and
9. The seats 24, previous to the folding‘ of 30 ‘member when the boat is in an unfolded opera
tive position.
the frame members 20, are folded against the
latter. The side members I, and Z are swung
inwardly against their associated bottom mem
bers 8 and 9, and each of the latter, together
with the aforementioned parts connected there
to, are then folded upwardly toward each other.
The ?exible end members 14 are tucked inwardly
4. In a collapsible boat having ?exibly con
nected elongated side and bottom members,
means for connecting a longitudinal side edge of
a bottom member with an adjacent longitudinal
side edge of a side member, comprising a ?exible
strip arranged interiorly and disposed between
ranged and connected together, the time required
‘to assemble the structure into an operable boat
is but a few minutes.
the adjacent longitudinal edges of the side and
bottom members, two longitudinal battens en
gaging with the lateral longitudinal edges of the
strip, one being secured to the bottom member
and the other to the side member, the particular
batten secured to the bottom member being ar
ranged to engage with the aforesaid longitudinal
45 edge of the side member when the boat is in an
unfolded operative position, whereby lateral
Having described my invention, what'I claim
. strains on the strip are reduced and contact
between the adjacent side members, and a suit-'
able cord or‘other means is then extended around
the folded structure to maintain the various
parts of the boat in a collapsed form.
Owing to
the novel manner in which the parts are ar
therewith-from the outside is avoided.
5. In a collapsible boat comprising longitudi
bottom members ?exibly connected longitudi 50 nally connected ‘side and bottom members ar
nally along adjacent side edges, two elongated
ranged for folding one upon another, the side
side members ?exibly connected to the outwardly
members being arranged in upstanding positions
disposed'longitudinal edges of the bottom mem
with respect to the bottom members with their
lower longitudinal edges resting on the bottom
bers, the said side members each being arranged
to fold upon its associated bottom member, fold 55 members, ?exible strips positioned interiorly of
the boat and arranged to form a water-tight ?ex
able end members pivotally connected to and fold
ible joint between the adjacent longitudinal’
able upon the bottom members, the said end mem
bers being arranged in pairs and each pair being
edges of the bottom and the side members, and
longitudinally disposed battens positioned inte
positioned to close an end of the boat, and a plu
1. In a collapsible boat, a pair of elongated
rality of pairs of rigid frame members pivotally 60 riorly for securing the ?exible’ strip to the bot
tom and side members, vthe said battens securing
connected to and folded upon the bottom mem
the strips to the bottom members being, arranged
bers and normally interposed between the side
and bottom members for maintaining them in
unfolded positions, the pairs of rigid frame mem
bers each comprising two angular members con
nected to the bottom members andv arranged to
engage with the side members, and seats pivot
to engage with the lower edges of the side mem
bers, whereby the said side members are pre
vented from shifting beyond certain points and
thereby exerting strains in the ?exible members.
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