U.S. patent number 3,815,954 [Application Number 05/127,649] was granted by the patent office on 1974-06-11 for rocker recliner chair.
This patent grant is currently assigned to The Lane Company, Inc.. Invention is credited to W. Clark Rogers, Jr., Morton Snitzer.
United States Patent |
3,815,954 |
Rogers, Jr. , et
al. |
June 11, 1974 |
ROCKER RECLINER CHAIR
Abstract
The chair back is reclined independently of movement of the
footrest which is operated by a handle. Detents associated with the
handle mechanism allow the footrest to be extended and retracted
into any four positions including fully extended, fully retracted
and two intermediate positions. As the back is reclined, the seat
and arms, which constitute a unit, are first tilted to a
predetermined "bucketing" angle by the locking mechanism, forward
rocking is inhibited then rearward rocking is also prevented by the
novel locking mechanism. The locking mechanism mounts on the
underside of the cam frame, between the cams and works off a torque
tube that moves angularly about its long axis as the footrest is
operated and which moves forward and upwardly and rotates angularly
as the chair back is reclined. The seat and frame unit also move
forwardly and upwardly as the chair is reclined. In the preferred
form, the chair is a platform rocker; it may also be mounted on a
swivel platform rocker base. The back is provided with tapered
sleeves which fit over tapered tongues on the mechanism to allow
the chair to be shipped knocked down, and then set-up. The footrest
includes two sections which store one behind the other when
retracted, then move to coplanar relationship as the footrest is
extended to its first position to provide greater extension. The
lazy tongs action of the footrest extending and retracting part of
the mechanism is skewed to permit exposed front rail and/or high
leg styling for the base. The design of the mechanism permits a
particularly cushioning seat filling to be used. A particular
design of rocker-recliner chair locking mechanism is disclosed and
claimed in this document.
Inventors: |
Rogers, Jr.; W. Clark (High
Point, NC), Snitzer; Morton (Rocky Mount, NC) |
Assignee: |
The Lane Company, Inc.
(Altavista, VA)
|
Family
ID: |
51427374 |
Appl.
No.: |
05/127,649 |
Filed: |
March 24, 1971 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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87280 |
Nov 5, 1970 |
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Current U.S.
Class: |
297/259.2 |
Current CPC
Class: |
A47C
1/0355 (20130101); A47C 3/027 (20130101); A61G
15/02 (20130101); A61G 15/12 (20130101) |
Current International
Class: |
A47C
1/031 (20060101); A47C 1/038 (20060101); A47C
3/027 (20060101); A47C 3/02 (20060101); A47c
003/02 (); A47d 013/10 () |
Field of
Search: |
;297/84,85,270-271,269
;2/342,DIG.7 ;248/224 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Gilliam; Paul R.
Attorney, Agent or Firm: Cushman, Darby & Cushman
Parent Case Text
REFERENCE TO RELATED CASE
This is a continuation-in-part of our copending U.S. patent
application Ser. No. 87,280, filed Nov. 5, 1970.
Claims
What is claimed is:
1. A rocker recliner chair including:
a base including a left side rail, a right side rail, a front rail
and a rear rail; the front and rear rails extending transversely of
the chair between the side rails, the side rails having means
defining rocker cam running surfaces thereon;
a rocker cam unit including a left and a right, laterally spaced,
rocker cams; said rocker cam unit being rockably mounted on the
base with the rocker cams thereof running on said rocker cam
running surfaces, said rocker cam unit being structured to carry a
chair seat, arms and back;
a first platform rocker spring unit secured to the right side rail
and the right rocker cam; a second platform rocker spring unit
secured to the left side rail and the left rocker cam;
a unitary left side linkage incorporating a plurality of pivotable
links and a right unitary side linkage incorporating a plurality of
pivotable links;
the left and right side linkages being mounted on the left and
right sides of the rocker cam unit;
a unitary chair seat and arm frame mounted on the left and right
side linkages; and
a chair back mounted on the left and right side linkages;
each side linkage including:
a generally horizontal bracket rigidly mounted on the cam frame; a
generally horizontal link rigidly connected to and supporting one
side of the seat and arm frame unit; and two, generally parallel,
generally vertically extending links, one pivoted at its upper end
to said bracket, near the rear end of the bracket and pivoted at
its lower end to said generally horizontal link near the rear end
of the generally horizontal link, the other of the generally
parallel links being pivoted at its upper end to said bracket near
the front end of the bracket and pivoted at its lower end to said
generally horizontal link near the front end of the generally
horizontal link, whereby the chair seat and arm frame unit is
mounted for parallelogram, swinging movement with respect to the
rocker cam unit; two longitudinally spaced, generally upwardly
extending links having lower ends rigidly connected to said
generally horizontal link; a generally horizontal channel disposed
above the aforementioned cam frame-mounted brackets, the upper ends
of the upwardly extending links being rigidly secured to the
generally horizontal channel; the seat and arm frame unit being
rigidly directly secured to the generally horizontal channels,
thereby supporting and rigidly connecting the seat and arm frame
unit with respect to the generally horizontal links;
a leg extending rearwardly from the lower end of the rearmost of
each of said generally parallel, generally vertically extending
links, resulting in the last-mentioned links being V-shaped;
an L-shaped chair back mounting link for each side linkage, each
said L-shaped link having a forwardly projecting leg and an
upwardly projecting link, the forward end of each forwardly
projecting leg being pivoted with respect to the upper end region
of the rearmost of the generally upwardly extending links whose
lower ends are rigidly connected to said generally horizontal link;
and each L-shaped link, near the juncture of the two legs thereof
being pivoted to the upper end of an operator link, the lower end
of each operator link being pivoted to the rearwardly extending leg
of the respective V-shaped link, distally of the juncture of the
rearwardly extending leg with the remainder of the V-shaped
link;
the chair back being mounted on the upwardly extending legs of the
L-shaped links, whereby reclining of the chair back rotates the
L-shaped links, disposing the upwardly extending legs rearwardly
and the forwardly extending legs upwardly, causing the V-shaped
links to be rotated via the operator links, thus moving the chair
seat and arm frame unit upwardly and forwardly with respect to the
cam frame;
a lazy tongs constructed and arranged to extend upwardly as it
extends forwardly; the two lazy tongs mounting a footrest between
them at the forward extent thereof; the footrest including two
longitudinally spaced, transversely extending halves, and the lazy
tongs include separate bracket means for mounting each of the
footrest sections; the bracket means for mounting the footrest
section which is longitudinally foremost when the lazy tongs are
extended including means for pivoting that footrest section to a
position longitudinally behind the other footrest section upon
retraction of the lazy tongs;
operator handle means mounted on one of the side linkages and
connected to operator link means for extending and retracting the
lazy tongs of that side linkage; and a torque tube extending
transversely between the side linkages and rigidly connecting the
operator handle means with operator link means for extending and
retracting the lazy tongs of the opposite side linkage, whereby
rotation of the operator handle extends and retracts both lazy
tongs, coordinately;
a longitudinally elongated, laterally narrow lock mechanism
constructed and arranged to, in a first condition, permit rocking
of the rocker cam unit with respect to the base, and to, in a
second condition, prevent rocking of the rocker cam unit with
respect to the base; the lock means including:
yoke means having a transversely, laterally extending pin; means
pivotally mounting the yoke means on the base for pivotal movement
about a transversely extending horizontal axis;
pivoting linkage means connecting the torque tube and the yoke
means for pivoting said yoke means about said transversely
extending horizontal axis upon rotation and upon translation of
said torque tube;
a cam and latch plate mounted on said rocker cam unit for movement
therewith, said cam and latch plate having means defining a curved
cam surface arranged to be engaged by the pin of said yoke means
upon rotation of the torque tube in a sense to extend the footrest
and upon forward, upward translation of the torque tube ensuing
with reclining of the chair back;
the axis about which the yoke means pivots being so displaced with
respect to the curvature of the cam surface of the cam and latch
plate that initial contact between the pin and the cam surface
fully inhibits forward rockability of the chair with respect to the
base thereof and further travel of the pin along the cam surface
forces the rocker cam unit to rock backward on the base by a
predetermined amount to `bucket` the chair occupant.
2. The rocker recliner chair of claim 1 wherein said linkage means
includes a long link that extends under a cross member of the
rocker cam unit and has a rear end pivoted to the yoke means; a
first L-shaped link having one end of one leg pivotally mounted
with respect to said cross member of the rocker cam unit and the
knee thereof pivoted to the forward end of said long link; a second
L-shaped link having one end pivoted to the opposite end of the
first L-shaped link; an ear mounted on said torque tube; the
opposite end of the second L-shaped link being pivoted to said
ear.
3. The rocker recliner chair of claim 1 wherein the cam surface
includes a notch intermediate the extent thereof facing said yoke
means and arranged to be entered by said pin upon bucketing of the
normal chair occupant to fully inhibit rearward rockability
also.
4. The rocker recliner chair of claim 3 wherein the cam surface
beyond the notch means is configured and oriented to be the place
where the pin initially contacts the cam surface when the chair is
occupied by a tall occupant who tends to rock the chair most of the
way back before beginning to extend the footrest or recline the
chair back, and so that further travel of the pin along the cam
surfaces buckets the tall chair occupant by a predetermined amount
that is greater than that for a normal chair occupant and
equivalent to a fully rocked back condition thereby fully
inhibiting further rearward rockability for the tall chair
occupant.
5. A rocker recliner chair including:
a base;
a rocker cam unit rockably mounted on the base;
a seat and arm frame unit;
a chair back;
a left side linkage and a right side linkage mounted on the rocker
cam unit and respectively mounting the left and right sides of the
seat and arm frame unit with respect to the rocker cam unit;
the left and right side linkages each comprising a plurality of
interpivoted links including; a parallelogram linkage system
hangingly mounting the seat and arm frame unit with respect to the
rocker cam unit, and a lazy tongs;
each side linkage further including a seat back mounting link
mounted to be arcuately moved as the chair back is reclined and
erected; a link extending between the seat back mounting link and
the parellelogram linkage system of the respective side linkage and
pivotally secured to each, so that, as the chair back is reclined
the chair seat and arm frame unit is moved upwardly and forwardly
by operation of the parellelogram linkage systems;
a footrest mounted upon and extending laterally between the forward
ends of the lazy tongs of the left and right side linkages;
a torque transmitting tube extending laterally between the left and
right side linkages and interconnecting the lazy tongs of the left
and right side linkages; and
an operator handle mounted on one of the side linkages and
connected crank-fashion to the lazy tongs of that side linkage so
that rotation of the operating handle extends and retracts the lazy
tongs of that side linkage directly and the other lazy tongs
coordinately via the torque tube;
a lock disposed laterally intermediate the side linkages; the lock
including a plurality of interpivoted links including one link
pivotally connected to the torque tube and arranged to operate the
lock both when the torque tube is rotated by rotation of the
operating handle in extending the lazy tongs and footrest and when
the torque tube is translated forwardly and upwardly in reclining
the chair back;
the lock further including yoke means having a transversely,
laterally extending pin; means pivotally mounting the yoke means on
the base for pivotal movement about a transversely extending
horizontal axis;
said interpivoted links including said one link connecting the
torque tube and the yoke means for pivoting said yoke means about
said transversely extending horizontal axis upon rotation and upon
translation of said torque tube;
a cam and latch plate mounted on said rocker cam unit for movement
therewith, said cam and latch plate having means defining a curved
cam surface arranged to be engaged by the pin of said yoke means
upon rotation of the torque tube in a sense to extend the footrest
and upon forward, upward translation of the torque tube ensuing
with reclining of the chair back;
the axis about which the yoke means pivots being so displaced with
respect to the curvature of the cam surface of the cam and latch
plate that initial contact between the pin and the cam surface
fully inhibits forward rockability of the chair with respect to the
base thereof and further travel of the pin along the cam surface
forces the rocker cam unit to rock backward on the base by a
predetermined amount to `bucket` the chair occupant.
6. A rocker recliner chair including:
a base;
a rocker cam unit rockably mounted on the base;
a unitary left side linkage and a unitary right side linkage, the
side linkages each comprising a plurality of interpivoted links and
being mounted on the rocker cam unit for mounting thereon a chair
back, a chair seat and arm frame unit and a footrest;
a rocker lock mechanism mounted on the rocker cam unit between the
side linkages and engageable with the base to inhibit rocking of
the rocker cam unit with respect to the base upon movement of the
side linkages to effect reclining of the chair back and upon
movement of the side linkages to effect extension of the
footrest;
a torque tube extending transversely between the two side linkages
and connected to corresponding links thereof for coordinating
footrest extending and retracting movements of the side
linkages;
the lock mechanism including;
yoke means having a transversely laterally extending pin; means
pivotally mounting the yoke means on the base for pivotal movement
about a transversely extending horizontal axis;
pivoting linkage means connecting the torque tube and the yoke
means for pivoting said yoke means about said transversely
extending horizontal axis upon rotation and upon translation of
said torgue tube; said linkage means including: a long link that
extends under a cross member of the rocker cam unit and has a rear
end pivoted to the yoke means; a first L-shaped link having one end
of one leg pivotally mounted with respect to said cross member of
the rocker cam unit and the knee thereof pivoted to the forward end
of said long link; a second L-shaped link having one end pivoted to
the opposite end of the first L-shaped link; an ear mounted on said
torque tube; the opposite end of the second L-shaped link being
pivoted to said ear; a cam and latch plate mounted on said rocker
cam unit for movement therewith; said cam and latch plate having
means defining a curved cam surface arranged to be engaged by the
pin of said yoke means upon rotation of the torque tube in a sense
to extend the footrest and upon forward, upward translation of the
torque tube ensuing with reclining of the chair back;
the axis about which the yoke means pivots being so displaced with
respect to the curvature of the cam surface of the cam and latch
plate that initial contact between the pin and the cam surface
fully inhibits forward rockability of the chair with respect to the
base thereof and further travel of the pin along the cam surface
forces the rocker cam unit to rock backward on the base by a
predetermined amount to `bucket` the chair occupant.
7. A rocker recliner chair including:
a base;
a rocker cam unit rockably mounted on the base;
a unitary left side linkage and a unitary right side linkage, the
side linkages each comprising a plurality of interpivoted links and
being mounted on the rocker cam unit for mounting thereon a chair
back, a chair seat and arm frame unit and a footrest;
a rocker lock mechanism mounted on the rocker cam unit between the
side linkages and engageable with the base to inhibit rocking of
the rocker cam unit with respect to the base upon movement of the
side linkages to effect reclining of the chair back and upon
movement of the side linkages to effect extension of the
footrest;
a torque tube extending transversely between the two side linkages
and connected to corresponding links thereof for coordinating
footrest extending and retracting movements of the side
linkages;
the lock mechanism including;
yoke means having a transversely laterally extending pin; means
pivotally mounting the yoke means on the base for pivotal movement
about a transversely extending horizontal axis;
pivoting linkage means connecting the torque tube and the yoke
means for pivoting said yoke means about said transversely
extending horizontal axis upon rotation and upon translation of
said torque tube;
a cam and latch plate mounted on said rocker cam unit for movement
therewith, said cam and latch plate having means defining a curved
cam surface arranged to be engaged by the pin of said yoke upon
rotation of the torque in a sense to extend the footrest and upon
forward, upward translation of the torque tube ensuing with
reclining of the chair back;
the axis about which the yoke means pivots being so displaced with
respect to the curvature of the cam surface of the cam and latch
plate that initial contact between the pin and the cam surface
fully inhibits forward rockability of the chair with respect to the
base thereof and further travel of the pin along the cam surface
forces the rocker cam unit to rock backward on the base by a
predetermined amount to `bucket` the chair occupant;
the cam surface including a notch intermediate the extent thereof
facing said yoke means and arranged to be entered by said pin upon
bucketing of the normal chair occupant to fully inhibit rearward
rockability also;
the cam surface beyond the notch means being configured and
oriented to be the place where the pin initially contacts the cam
surface when the chair is occupied by a tall occupant who tends to
rock the chair most of the way back before beginning to extend the
footrest or recline the chair back, and so that further travel of
the pin along the cam surfaces buckets the tall chair occupant by a
predetermined amount that is greater than that for a normal chair
occupant and equivalent to a fully rocked back condition thereby
fully inhibiting further rearward rockability for the tall chair
occupant.
8. The rocker recliner chair of claim 7 further including an
operating handle; linkage means on one of the side linkages
connecting the operating handle to the torque tube so that rotation
of the operating handle produces coordinate operation of both side
linkages;
limited most motion means incorporated between the one side linkage
and the operating handle, including a plate having notch means in
the periphery thereof, a follower pin adapted to run along the
periphery of said plate upon rotation of the operating handle;
spring biasing means connected to the follower pin for forcing the
follower pin into the notch means to arrest footrest retracting
movement of the side linkages; and the linkage means on said one
side linkage including means for withdrawing the follower pin means
from any of the notch means upon application of rotational torque
to the operating handle in a sense to produce footrest retracting
movement of the side linkages.
9. In a rocker recliner chair having a base, a rocker cam unit
rockably mounted on the base via rocker cams, a seat and arm frame
unit mounted on the rocker cam unit, a chair back which can be
reclined and erected, and a footrest which can be extended and
retracted: a lock mechanism mounted on the rocker cam unit for
permitting rocking of the seat and arm frame unit, chair back,
footrest and rocker cam frame on the base so long as the footrest
is retracted and the chair back is erect and preventing rocking of
the seat and arm frame unit, chair back, footrest and rocker cam
frame on the base when either of the following conditions exist:
the footrest is extended and the chair back is reclined;
the lock mechanism including:
yoke means having a transversely, laterally extending pin; means
pivotally mounting the yoke means on the base for pivotal movement
about a transversely extending horizontal axis;
linkage means connecting the footrest, the seat and arm frame unit,
the back and the yoke means for pivoting said yoke means about said
transversely extending horizontal axis upon extension of the
footrest and upon reclining of the chair back;
a cam and latch plate mounted on said rocker cam unit for movement
therewith, said cam and latch plate having means defining a curved
cam surface arranged to be engaged by the pin of said yoke means
upon
extension of the footrest and upon reclining of the chair back;
the axis about which the yoke means pivots being so displaced with
respect to the curvature of the cam surface of the cam and latch
plate that initial contact between the pin and the cam surface
fully inhibits forward rockability of the chair with respect to the
base thereof and further travel of the pin along the cam surface
forces the rocker cam unit to rock backward on the base by a
predetermined amount to `bucket` the chair occupant.
10. The rocker recliner chair of claim 9 wherein the cam surface
includes a notch intermediate the extent thereof facing said yoke
means and arranged to be entered by said pin upon bucketing of the
normal chair occupant to fully inhibits rearward rockability
also.
11. The rocker recliner chair of claim 10 wherein the cam surface
beyond the notch means is configured and oriented to be the place
where the pin initially contacts the cam surface when the chair is
occupied by a tall occupant who tends to rock the chair most of the
way back before beginning to extend the footrest or recline the
chair back, and so that further travel of the pin along the cam
surfaces buckets the tall chair occupant by a predetermined amount
that is greater than that for a normal chair occupant and
equivalent to a fully rocked back condition thereby fully
inhibiting further rearward rockability for the tall chair
occupant;
the lock mechanism including:
notch means mounted on one of the rocker cam unit and the chair
base, pin means mounted on the other of the rocker cam unit and the
chair base; means responsive to translation and rotation of the
torque tube for moving the pin means into the notch means upon
predetermined rotation of the torque tube in a sense to extend the
footrest or predetermined translation of the torque tube incident
to reclining of the chair back, to lock the rocker cam unit with
respect to the base to fully inhibit forward and rear rockability
of the chair with respect to the base thereof.
Description
BACKGROUND OF THE INVENTION
To a certain extent the precursors of modern rocker recliner chairs
come from diverse fields -- surgical, barber and dentist chairs,
automotive and aircraft seating, chaise lounges and other lawn
furniture as well as living room-type easy chairs.
The number of such chairs which have been patented in the United
States is extensive, although many of those patented since 1950,
were issued to repeat patentees and are directed to variations on
their earlier-patented designs.
A list of the prior U.S. patents of which the present inventors are
aware has been filed in the U.S. Patent Office concurrently with
this document. In view of the extensiveness of this art it is
considered more helpful to discuss the various types of modern
chairs by group.
Certain platform rockers outwardly resemble rocker recliner chairs,
but their backs are unitary with their seats and/or arms and so
cannot recline. They merely tilt back.
Likewise, certain recliner chairs do not include cams mounted on a
base and so cannot rock, but only recline.
A further distinction may be drawn between chairs which have
operating handles (or equivalent operating devices such as
push-pull rods, mechanical push buttons or electrical switches) and
those which have no comparable devices. In the former instance, the
handle or equivalent device often acts merely as a lock operator;
in other instances it constitutes an operator for extending and
retracting the footrest and/or an operator or trip for lowering and
raising the back.
In recliner chairs which do not have operating handles, generally,
the reclining and footrest operating portions of the linkages are
interconnected so that reclining of the back causes extension of
the footrest and raising of the back causes retraction of the
footrest.
Another distinction may be drawn between modes of mounting and
moving the seat. In some rocker recliner chairs the seats are
pivotally mounted to the arm frame, the chair back and/or the cam
frame. In this context, "pivoting" is intended to be interpreted in
a narrow sense of part-circular arcuate movement about a fixed
pivot point. Pivoted mounting of the seat is to be contrasted with
fixed or combined translational and rotational mounting of the
seat. One instance wherein the distinction is emphasized is the
patent of Knabusch et al., U.S. Pat. No. 3,096,121.
In most instances where the seat is pivotally mounted, reclining of
the back causes the chair users center of gravity to be shifted
rearwardly to an appreciable extent. Because of this shift, such
chairs are usually provided with back legs which extend rearwardly
from under the base and are exposed behind the base for e.g. 6
inches. Such legs are usually a dead give-away that the chair is a
recliner. This, of course, restricts styling treatments which may
be given such chairs. The rearward shift also increases the
distance the chair must be positioned from a room wall so that the
top of the back will have sufficient clearance during
reclining.
The least elegant way to design a rocker-recliner chair is to take
an existing recliner chair and provide it with rocker cams and a
platform base. Several problems result from such design economy --
one important one being that there is nothing to prevent the chair
from continuing to be able to rock after it has been reclined. The
feeling an unwary user of such chairs can have upon fully reclining
then rocking back, for instance in a continuing motion, is nothing
less than very startling. Particularly in chairs whose seats tilt
back or move back during reclining, the permitted rocking during
reclining can easily result in a frightening falling over backwards
of the chair and its occupant.
An improvement on the complete lack of a lock is the provision of a
lock which is operated manually, e.g. via a push-pull rod. This, of
course, may have the disadvantage that a new user may not notice
the handle until he has already reclined himself over
backwards.
In locks which operate in coordination with extension of the
footrest or reclining of the chair, often only forward rocking is
inhibited. This is for complex reasons involving a lack of
mechanism in such chairs to "bucket" the user to a comfortable
angle for reclining as an initial part of the reclining movement
and a need to prevent the user from putting so much of his weight
on the forward parts of his thighs, near the insides of his knees,
that the retracted footrest is jammed into the floor, preventing
reclining and/or desired footrest extension.
It is not difficult to see that locking mechanism designs of prior
art rocker recliner chairs have imposed strict styling limitations
on such chairs, both as to reducing the prospects for exposed wood
styling and as to imposing such upholstering constraints that the
resulting products look stolid and/or have poor seat comfort
because the seat must be designed so it does not travel vertically
very much as someone sits or bounces on it. With some prior art
rocker recliner chair locking mechanisms, it is difficult or
impossible to provide a swivelable variant because the parts of the
base the lock works off would have to remain stationary as the
remainder of the chair moved angularly, or because parts of the
recliner mechanism would interfere with the base during
swivelling.
In most recliner chairs and rocker recliner chairs which have
footrests, lazy tongs or more or less equivalent mechanisms are
used to extend and retract the footrests, which are usually
constituted by one unitary ottoman (exclusive of skirts or
shrouds). Accordingly such footrests are usually either misnomers
(because they contact the average user at the back of his calves
above his ankles) or they must extend so far that the lazy tongs
are laterally unstable and/or are heavy and expensive.
SUMMARY OF THE INVENTION
The chair back is reclined independently of movement of the
footrest which is operated by a handle. Detents associated with the
handle mechanism allow the footrest to be extended and retracted
into any four positions including fully extended, fully retracted
and two intermediate positions. As the back is reclined, the seat
and arms, which constitute a unit, are first tilted to a
predetermined "bucketing" angle by the locking mechanism, forward
rocking is inhibited then rearward rocking is also prevented by the
novel locking mechanism. The locking mechanism mounts on the
underside of the cam frame, between the cams and works off a torque
tube that moves angularly about its long axis as the footrest is
operated and which moves forward and upwardly and rotates angularly
as the chair back is reclined. The seat and frame unit also moves
forwardly and upwardly as the chair is reclined. In the preferred
form, the chair is a platform rocker; it may also be mounted on a
swivel platform rocker base. The back is provided with tapered
sleeves which fit over tapered tongues on the mechanism to allow
the chair to be shipped knocked down, and then set-up. The footrest
includes two sections which store one behind the other when
retracted, then move to coplanar relationship as the footrest is
extended to its first position to provide greater extension. The
lazy tongs action of the footrest extending and retracting part of
the mechanism is skewed to permit exposed front rail and/or high
leg styling for the base. The design of the mechanism permits a
particularly cushioning seat filling to be used.
The principles of the invention will be further hereinafter
discussed with reference to the drawings wherein preferred
embodiments are shown. The specifics illustrated in the drawings
are intended to exemplify, rather than limit, aspects of the
invention as defined in the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
FIG. 1 is a perspective view of a preferred embodiment of the
rocker recliner chair of the invention;
FIG. 2 is a fragmentary top plan view of the chair showing one of
the two opposite side linkages of the chair, the one which carries
the operating handle. In the condition depicted, the footrest is
fully retracted and the chair back is upright;
FIG. 3 is a fragmentary side elevation of the chair showing the
side linkage of FIG. 2 in the same condition;
FIG. 4 is a fragmentary longitudinal vertical sectional view of the
chair showing the lock when the footrest is fully retracted and the
chair back is erect;
FIG. 4a is an exploded perspective view of a portion of the lock
depicted in FIG. 4;
FIG. 5 is a fragmentary top plan view of the chair showing the side
linkage of FIG. 2 in a condition wherein the footrest is fully
extended and the chair back is erect;
FIG. 6 is a fragmentary side elevation view of the chair showing
the side linkage of FIG. 5 in the same condition;
FIG. 7 is a fragmentary longitudinal vertical sectional view of the
chair showing the lock when the footrest is fully extended and the
chair back is erect;
FIG. 8 is a fragmentary side elevation view of the chair showing
the side linkage of FIG. 2 in a condition wherein the footrest is
fully extended and the chair back is fully reclined;
FIG. 9 is a top plan view of a variant of the preferred chair base
equipped for 360 degree swivelling; and
FIG. 10 is a longitudinal sectional view of one of the box channel
end mounts of the variant of FIG. 9;
FIG. 11 is a fragmentary exploded perspective view, from the inner
side, of the left side linkage, the one which mounts the operating
handle.
DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENT THE PLATFORM
ROCKER BASE
The rocker recliner chair 10 includes as major components: a
platform rocker base 12, a rocker cam unit 14; left and right
platform rocker springs 16, which are conventional units; a lock
mechanism 18; left and right side linkages 20, 22, which are mirror
image complements of one another, excepting that the left side
linkage (facing the chair) includes additional elements for
footrest operation; a torque tube 24 extending transversely between
the side linkages; a chair back 26; a chair seat and arm frame unit
28; a proximal footrest portion 30 and a distal footrest portion
32, which together constitute a footrest 34. The remainder of the
chair 10 consists of various connecting upholstering and framing
elements which are ancillary to the major components.
As depicted, the platform rocker base 12 includes two horizontal,
longitudinally extending, laterally spaced side rails 36. The upper
surfaces 42 of the side rails are smooth, flat and horizontal as
they are the surfaces upon which the rocker cams run. The base 12
further includes a front rail 44 which extends laterally between
the side rails near their front ends and a rear rail 46 which
extends laterally between the side rails near their rear ends. In
the embodiment depicted, the front and rear rails extend laterally
outwardly beyond the side rails a few inches in order to provide
mountings for left and right outriggers 48. The outriggers underlie
the side edges of the seat and arm frame and carry front and rear
feet 38, 40 for the chair. It should be noted that the rear feet do
not protrude rearwardly anywhere near as much as the rear feet of
most commercially available rocker recliner chairs. The avoidance
of protrusion stems from the manner of "hanging" the seat and arm
frame from the rocker cam unit as will be apparent later on.
The outriggers provide stability for the chair, especially if
someone sits on one of its arms, and provides an area which may be
decorated with "show wood" i.e. attractive veneers or solid fruit
wood, nut wood or molded styrene or the like for instances where
the upholstering style for the seat and arm frame does not include
skirts,
Note now that the rear rail 46 is mounted on edge, so that it is
relatively thick in a vertical direction. This is because, during
bucketing, the lock obtains purchase against that rear rail
intermediate the side rails. Alternatives to mounting the rear rail
on edge would be to attach a floor engaging support block to the
rail underlying the contact region of the lock or to mount the rear
rail so it engages the floor along its whole extent.
THE ROCKER CAM UNIT
In the preferred embodiment the rocker cam unit includes two rocker
cams 50, being a left one and a right one each having a compound
curved arcuate lower surface 52 configured to support the rocker
cam unit on the upper surfaces 42 of the side rails 36. The
attitude and curvature of the cam surfaces 52 determine the rate of
deviation from horizontal while rocking, the ease of rocking during
operations where rocking is not fully inhibited, the attitude of
the chair when it is upright and no one is sitting in it, and
(absent the provision of other constraints) the extremes of
rocking.
In order to integrate the rocker cams into a unit, there are
provided cross members which are rigidly connected to the rocker
cams. In the instance shown there is a first cross member 54
provided between the top-front corners of the rocker cams and a
second cross member 56 provided between the top-rear corners of the
rocker cams. The cross members 54 and 56 also provide sites for
mounting the lock mechanism 18 and the side linkages 20, 22.
THE SIDE LINKAGES
As pointed out initially, the side linkages 20 and 22 are mirror
images of one another about the front-to-rear central axis of the
chair, excepting that the side linkage which is on the left as you
stand near the footrest and face the chair back has some extra
components which are used to control operation of the footrest.
The left side linkage will be discussed in detail, then it will be
pointed out which of its elements are omitted from the right side
linkage. The side linkages, sometimes referred to as "hardware" in
the trade are made of stamped steel plate and are usually
spray-painted flat black. Parts subject to most wear may be
hardened or toughened by conventional techniques as will be
understood by those skilled in this field of technology.
The left side linkage 20 includes a mounting plate 58 having a
horizontal flange 60 and a vertical flange 62. The flange 60 is
fixed on the top of the rear cross member 56 with screws 64. The
vertical flange 62 has a first, horizontal-axis, inwardly extending
pivot 66 near its upper rear corner and a second, horizontal-axis,
inwardly extending pivot 68. Between the pivots 66 and 68 an
outwardly extending stop boss 70 is provided. This boss is engaged
by a pivoting link during reclining of the chair back, which
engagement stops further reclining of the chair back at "full
recline" or "full layout" (a synonum).
The upper end of one leg of a V-shaped link 72 is pivotally secured
to the pivot 66; the upper end of another link 74 is pivotally
secured to the pivot 68. The lower ends of the links 72 and 74
respectively carry horizontal-axis pivots 76 and 78 which, in turn,
pivotally mount opposite ends of a link 84. The plate flange 62
plus the links 72, 74 and 84 constitute a parallelogram linkage
which comes into play as the chair back is reclined to produce an
upward and forward movement of the chair seat and arm frame.
The chair back is mounted on the upstanding leg 80 of an L-shaped
link 82 whose other, forwardly projecting leg 83 is provided with a
horizontal-axis pivot 86 near its outer end. A link 88 has its
opposite ends mounted on the pivots 76 and 86 and bows laterally
outwardly between the ends and it carries an intermediate
horizontal-axis rivet 90. The lower end connection of the link 88
to the pivot 76 is also a fixed connection.
The rear leg 92 of the V-shaped link 72 carries a horizontal-axis
pivot 94 intermediate its ends. The L-shaped link 82 also carries a
horizontal-axis pivot 96 at the juncture of its legs. A link 98 has
its opposite ends mounted on the pivots 94 and 96. As the
chair-user pushes back on the chair back to recline the chair back,
the L-shaped link 82 pivots downwardly about the pivot 86 which
moves the pivot 96 downwardly and forwardly, then upwardly. That
motion, transmitted to the link 98 causes the rear leg 92 of the
V-shaped link 72 to move arcuately through an upwardly concave arc.
Because of the pivotal mountings at 66 and 68, the action just
described translates the link 84 forwardly and upwardly.
A stop boss 100 provided at the upper end of the rear leg 92 of the
V-shaped link 72 engages an intermediate portion of the link 98 to
limit erectness of the chair back when the chair back is returned
from a reclined condition. The boss 100 is thus the
opposite-extreme counterpart of the boss 70.
It should now be noticed that the link 84 projects a short distance
forwardly of the pivot 78; the projection 102 carries a
horizontal-axis major pivot 104. This pivot (104) also mounts a
two-plane L-shaped link 106 near the base of the leg 108 of the
link that lies in a vertical plane. The other leg 110 of the link
106 extends inwardly and is provided with bolt holes 111 for
mounting one end region of the torque tube 24, via bolts 112. The
pivot 104 also mounts the plate 114 and the link 116. The links 106
and 116 are fixed on the pivot 104 to rotate with it; the pivot 104
is rotatable with respect to the plate 114 and the link extension
102.
The link 116 is L-shaped in a vertical plane and has a fold in its
longer leg to produce an outwardly extending crank tab 118. It is
this tab to which the operating handle 120 is secured via an angle
iron/box channel intermediate assembly 122 secured to the back of
the decorative-wood handle.
The portions of the side linkage which are about to be described
operate the footrest and mount the seat and arm frame unit.
The left side edge of the underside of the seat of the latter is
placed upon the "horizontal" plane flange 123 of the rail 124 and
screwed in place at 126. The central portion of the vertical plane
flange 125 of the rail 124 is secured to the upper margin of the
plate 114 with a rivet 128 and a horizontal-axis rivet 130.
Basically, the footrest is caused to extend and retract by rotation
of the operating handle 120, which rotates the box channel 122
about its own longitudinal axis, which, in turn, arcs the vertical
plane portion of the link 116 about the pivot 104 to which the link
116 is fixed. (Because of the fixation of the link 106 to the pivot
104 also, this rotational motion is transmitted via the torque tube
24 to the corresponding link 116 of the right side linkage.)
The lower end of the link 106 vertical leg 108 is provided with a
horizontal-axis pivot 132 (FIG. 11).
The lower edge of the plate 114 is arcuate, convex downwardly at
134, and proceeding forwardly is provided with two generally
upwardly facing shoulders or notches 136, 138 and, uppermost, a
deeper notch 140. The pivot 132 has a long axis shank which mounts
a tubular collar 142. The collar 142 is positioned to clear the
arcuate surface 134.
The pivot 132 mounts an intermediate part of a link 144 whose
forward end carries a horizontally outwardly projecting pin 146
positioned to ride along the surface 134 and to engage the
shoulders 136, 138 and slot 140.
The opposite end of the link 144 carries a horizontal-axis pivot
148 which also mounts the lower end of the link 116 and receives
the coil portion of a spring 150 whose one end fits through a slot
opening 152 in the link 116 near the pivot 148 and whose opposite
end bears against the collar 142 on the pivot 132. The spring is
coiled in a sense to bias the pin 146 against the surface 134, the
shoulders 136 and 138 and the slot 140. (Items 134-140 are
collectively referred to as the footrest control cam.)
However, application of rearward rotational torque on the operating
handle 120 causes rotation of the link 116 about the pivot 104,
which moves the lower end of the link 116 rearwardly. This action
moves the pivot 148 rearwardly causing the link 144 to pivot about
the pivot 132, against the biasing action of spring 150 thus moving
the pin 146 out away from the surface 134, the shoulders 136, 138
and/or the slot 140 so long as that torque continues to be applied
to the operating handle 120.
When the chair-user lets go of the operating handle, the relaxation
of the torque permits the spring 150 to rotate the link 144 until
the pin 146 is back in engagement with the footrest control cam. It
should be apparent that when the footrest is fully retracted, the
pin 146 is in engagement with the surface 134, when the footrest is
in its first partly extended position the pin 146 is in engagement
with the shoulder 136, when the footrest is in its second partly
extended position the pin 146 is in engagement with the shoulder
138 and when the footrest is in its fully extended condition the
pin 146 is engaged in the slot 140. (Because of the shapes of the
neighboring surfaces of footrest control cam, the shoulders 136 and
138 can be considered to be outwardly opening slots which are easy
to enter as the pin is moving from 134 toward 140, but impossible
to slide out of in the reverse direction, absent operation of the
pin withdrawing mechanism just described.)
The portion of the side linkage mechanism for extending and
retracting the footrest includes modified lazy tongs comprising two
links 154, 156 which are spaced along the rail 124 to the vertical
flange of which their upper ends are pivoted at 158, 160. The lower
end of the link 154 carries a horizontal-axis pivot 162 which
pivotally mounts the rear end of a long forwardly extending link
164. The link 156 projects below the link 164 and has an
intermediate portion pivotally secured to an intermediate portion
of the link 164 by a horizontal-axis pivot 166. It should be
noticed that the members pivoted to one another at the pivots 162,
166, 160 and 158 constitute another parallelogram linkage.
The end of the link 156 which extends below the link 164 carries a
horizontal-axis pivot 168 which pivotally mounts the rear end of a
forwardly and upwardly extending link 170. About three-fifths of
the way toward its forward end, the link 170 is provided with a
horizontal-axis pivot 172 which pivotally mounts the intermediate
portion of a short link 174. The lower end of the link 174 is
pivoted to the forward end of the link 164 by a horizontal-axis
pivot 176. The upper end of the link 174 is pivoted to the rear end
of a forwardly projecting link 178 by a horizontal axis pivot
179.
The link 178 crosses past the link 170 and has an intermediate
portion pivotally secured to the primary footrest (closer footrest
half) mounting bracket 180 by a horizontal-axis pivot 182. The
forward end of the link 170 is pivotally secured to the primary
footrest mounting bracket 180 by a horizontal-axis pivot 184 which
is located forwardly and upwardly from the pivot 182. The footrest
hardware further includes a secondary footrest mounting bracket 186
which has an upper and a lower horizontal-axis pivot 188, 190,
which respectively become rearmost and foremost when the footrest
is fully extended. The primary footrest mounting bracket 180 has a
lower horizontal-axis pivot 192 which corresponds to the pivot 190
of the secondary footrest mounting bracket. A parallelogram link
194 extends between pivotal mounting on the pivots 184 and 188;
another parallelogram link 196 extends between pivotal mounting on
the pivots 192 and 190.
An operator link 198 for the footrest lazy tongs has a rear end
pivotally secured to an intermediate portion of the link 154 by a
horizontal-axis pivot 200 and has a lower end pivotally secured to
the horizontal-axis pivot 132.
An operator link 202 for the secondary footrest (further footrest
half) has one end pivotally secured to the forward end of link 178
by a horizontal-axis pivot 204 and has its opposite end pivotally
secured to an intermediate portion of the parallelogram link 196 by
a horizontal-axis pivot 206.
When the footrest is fully retracted, the modified lazy tongs are
very compact; the secondary footrest lies tucked behind the primary
footrest. As the footrest operating handle is rotated in a sense to
extend the footrest, the scissored links extend forwardly and
upwardly until they are almost aligned. During this activity, the
parallelogram linkage at 180, 194, 186, 196 operates to secnd the
secondary footrest under, then forwardly of the primary footrest as
both footrest halves change from a generally vertical disposition
to a generally horizontal disposition. This action, and the lengths
of the linkage elements 180, 194, 186, 196 cause the footrest to be
compact when stored, yet much more extensive when fully extended
than conventionally constructed footrests.
In the preferred embodiments, the structures which have been
described as "horizontal-axis pivots" are steel pins, initially
headed on one end, then axially squeezed to provide an enlargement
at the distal end of the shank after being inserted through aligned
openings in the parts to be pivotally secured to one another. The
openings are sufficiently large to allow the desired pivoting and
the squeezing is controlled to prevent axially binding the joint
formed. Bushings, e.g. steel washers are inserted between most of
the link ends on each pivot to enhance the pivotability of the
joint and to reduce binding and wear.
DIFFERENCES BETWEEN THE LEFT AND RIGHT SIDE LINKAGES
On the right side, the plate 114 is not as wide and does not have a
footrest operating cam; the link 106 is omitted as are the link 144
and the spring 150 and the portion of the link 116 which extends
below the pivot 104.
THE CHAIR BACK AND UPHOLSTERY
In the preferred embodiment the chair back 26 comprises a wooden
frame covered with springing, stuffing and upholstery. At the lower
extents of the sides, the chair back is provided with brackets 208
for receipt of the upwardly projecting legs 80 of the L-shaped
links 82. It should now be noticed that the legs 80 taper as they
proceed upwardly; the channels 210 of the brackets 208 taper in
correspondence with the legs 80. Thus assembly of the chair back to
the side linkages involves slipping the bracket 208 channels 210
over the legs 80 and lowering the back until the legs have "homed"
in the channels. Then screws 212 may be run through the aligned
openings 214, 216 to secure the back to the chair.
Note that both the chair back and the seat and arm frame can be
fully manufactured and upholstered before being installed on the
chair. (Off-line manufacture and upholstering of these units is
considered advantageous because problems occurring during one
operation need not affect assembly.)
The ease of assembly of the back to the chair means the chair can
be shipped in a "knocked-down" condition, i.e. with the back
separate from the rest of the chair and packed with the rest of the
chair in a much more compact box than could be the case if the
chair were shipped fully assembled.
In order to improve the appearance of the juncture of the chair
seat and back as seen from behind the chair while the chair back is
erect, a flap of upholstery may be provided which extends from
below the remainder of the chair back and zips onto the upholstery
of the seat and arm frame near the lower rear marginal edge of the
latter. The upholstery may also include side skirts on the seat and
arm from sides and back to mask the chair "hardware," similar
service may be performed by a flap of upholstery extending from the
chair seat front, below its cushion, to the rear edge of the
primary footrest, between the modified lazy tongs of the footrest
operating portions of the side linkages. Another flap 217 is shown
flipped up from the primary footrest 30 to expose the secondary
footrest 32.
THE PLATFORM ROCKER SPRINGS
These elements 16 are conventional units which are conventionally
secured to the insides of the cams and platform rocker base. They
provide a datum for the chair in providing restoration force means
tending to return the chair, when rocked, to an intermediate
condition between rocked back and rocked forward.
THE PREFERRED LOCK MECHANISM
It is important to note that, in the preferred embodiment, the lock
and side linkages are separate from one another and affect one
another via the torque tube 24 to which both the side linkages and
the lock are connected.
The preferred lock 18 is a unitary assembly which is mounted on the
underside of the rear cross member 56 of the rocker cam unit and is
also connected to the torque tube to be operated through
translational and rotational movement of the torque tube with
respect to the rocker cam unit and the platform rocker base 12.
As shown, the lock 18 is relatively narrow in a side-to-side
direction and relatively long in a front to back direction. It may
be installed at a location laterally offset from the front-to-back
centerline of the chair, about halfway toward one of the rocker
cams in order to keep those portions of the lock which project
upwardly from being directly under the part of the seat which is
distended downwardly the most when someone is sitting in the
chair.
The lock mechanism includes a plate 350 screwed to the bottom of
the rear cross member 56 at 352. The plate has a thick, depending,
longitudinally extending flange 354 which projects forwardly and
upwardly of the plate 350 adjacent the front edge of the cross
member 56 to provide a horizontal axis pivot 356.
The flange 354 also extends rearwardly of the cross member 56 where
it expands upwardly to provide a cam and lock plate 358. The latter
has a generally upwardly and rearwardly convex cam surface 360 that
includes a rearwardly opening notch 362 about three-fourths of the
way up the surface 360.
The pivot 356 mounts the upper end of an L-shaped link 364. When
the chair is in an upright condition with the footrest retracted,
the link 364 extends downwardly, then rearwardly from the pivot
356. The opposite, outer rearward end of the link 364 carries a
horizontal axis pivot 366 which pivotally mounts the rear end of
another L-shaped link 368. From the pivot 366, the L-shaped link
368 extends forwardly, then upwardly (when the chair is in an
upright condition with the footrest retracted).
The lock further includes a keeper 370 that is mounted in the
inside of the rear rail 46 of the base 12 by screws 372. The keeper
370 includes a plate 374 which has two laterally spaced forwardly
projecting lugs 376 which have horizontal axis pivots 378 at
corresponding locations at their forward ends. The pivots 378
pivotally mount the lower ends of a generally U-shaped yoke 380.
The latter has a horizontal, transversely extending cam follower
pin and keeper 382 mounted between its legs a short distance down
from the upper extent thereof the lock is operated by a rigid bow
shaped link 383 which dips under the rear cross member 56, has its
forward end pivoted to the knee of the L-shaped link 364 at 384 and
has its rearward end pivoted at 386 to one leg of the yoke 380
below the pin/keeper 382.
The lock 18 works off the torque tube 24 by being pivotally
connected thereto. A C-shaped bracket 254 has its back aligned with
and bolted to one side of the hollow, square-sectioned torque tube
24. The forward, upper end of the L-shaped link 368 is pivotally
secured to the end of one leg of the bracket 254 by a
horizontal-axis pivot 258.
It should be apparent that without conceptual modification, the
keeper could be mounted on the inside of the front rail and the
lock reversed to coact with the reoriented keeper.
The other leg 272 of the C-shaped bracket 254 mounts a helper
spring. The two legs of the bracket 254 could be on separated
elements; providing them on the same element simplifies assembly of
the chair. The outer end of the short leg 272 carries a
horizontal-axis pivot 274 which pivotally mounts one end of a short
link 276 whose opposite end carries a horizontal-axis pivot 278.
There is provided an arcuate link 280 which has one end pivotally
mounted at 278 and which has an opening 282 in its opposite end for
receipt of one hooked end of a tensioning helper coil spring 284
whose opposite end is secured to the underside of the front of the
seat of the seat and arm frame for assisting in retraction of the
footrest. The links 276 and 280 can be considered as a composite
link articulated at 278 in order to decrease the envelope of upward
extension of the composite link as the torque tube is operated, to
correspondingly decrease the space needed between the seat and the
torque tube to accommodate operation of that link.
CHARACTERISTICS OF THE PREFERRED LOCK
Extending the Footrest
Grasp the operator handle and begin rotating it; this rotates the
torque tube. This pulls the link 368 forwardly and its forward end
upwardly, causing the L-shaped link 364 to pivot about the pivot
356. That, in turn, causes the link 364 knee to move forwardly and
upwardly which pulls the bowed link 383 forwardly. The latter pulls
the yoke 380 forwardly about the pivot 386 so that the pin/keeper
382 contacts the cam surface 360. Once the pin/keeper 382 contacts
the cam surface 360, the chair occupant is positively inhibited
from being able to rock forwardly. As rotation of the operating
handle continues, the pin/keeper rides relatively up the surface
360 partly by further rotation of the yoke 380 forwardly about the
pivots 386 and partly by pushing the cam and lock plate 358
downwardly. The latter occurs because the yoke 380 moves more
nearly horizontally than the curve of the cam surface 360. Because
the cam and lock plate 358 is rigid with respect to the rocker cam
unit, downward movement of the cam and lock plate 358 causes the
rocker cam unit (to which the seat and arm frame are secured) to
tilt rearwardly to a predetermined degree to provide the
aforementioned "bucketing." When bucketing has been achieved, the
pin/keeper 382 has entered the notch 362 and the rocker cam unit is
fixidly secured against both forward and rear rocking.
Reclining With the Footrest Already Extended
The seat and arm frame move upwardly and forwardly, with respect to
the remainder of the chair, about the parallelogram portions of the
side linkages. Motion between the torque tube, which moves upwardly
and forwardly with the seat and arm frame unit, and the lock which
remains engaged as it was, is accommodated in lost motion by
rotation of the link 386 upward about the pivot 386, causing
lifting and rotation of the L-shaped link 364.
Reclining Without Extension of the Footrest
As the back is pushed down the torque tube does not move with
respect to the seat and arm frame; it moves upwardly and forwardly
with the seat and arm frame, pulling the bowed link forwardly
causing inhibiting of forward rock, bucketing and latching against
forward and rear rocking substantially as described under the
heading "Extending the Footrest." Full relining is achieved at
about the same point in time as latching of the pin/keeper in the
cam notch. When certain long-legged, tall people sit in the chair,
their natural inclination is to tilt the seat and arm frame
backward, i.e., by rocking the rocker cam unit back on the side
rails of the base. When they then begin to recline, the pin/keeper
misses the cam notch and engages the cam surface 360 above the
notch. The cam surface is so configured that pressure of the pin on
the cam surface above the notch rocks the chair to an extreme
thereby preventing forward rocking and further rearward rocking.
This automatically produces a bucketing angle which taller people
seem to like better. If the footrest is extended after the back has
been reclined, rotation of the torque tube by the operating handle
causes wrapping of the L-shaped link 368 of the lock further about
the torque tube, in lost motion, without further disturbing the
lock.
Lowering the Footrest
Grasp the operating handle and in one smooth movement, rotate it
forwardly to its initial angular disposition: the footrest will
smoothly return from a fully extended to a fully retracted
condition. Alternatively, grasp the operating handle, rotate it
forwardly slightly, then let it go. It will then rotate further
until the footrest position pin drops into the second extended
position slot or shoulder on the footrest position cam. If desired,
tap the handle for a second time, the pin will withdraw from the
shoulder or notch and the footrest will retract to its first
extended position where the footrest position pin drops into the
first extended position shoulder or slot on the footrest position
cam. Tapping the operating handle forwardly a third time will cause
the footrest to drop to a fully retracted condition. Of course, the
footrest may be brought directly from the second extended position
to the fully retracted position by forward rotation of the handle
as explained under the preceding section. Also, the footrest may be
raised from any intermediate position should the user change his
mind after partly retracting the footrest and decide to extend
it.
DIFFERENCES FOR THE SWIVEL VARIANT
With reference to FIGS. 9 and 10 a variation of the preferred
embodiment of the chair is shown modified and equipped for 360
degrees swivelling about a vertical axis. FIG. 9 is a top plan view
of the modified platform rocker base; all of the preferred
embodiment above the platform rocker base remains as depicted in
the earlier Figures.
The base 12 is modified by omission of the supporting outriggers
48; by inclusion of two laterally spaced box channels 290 with flat
tabs 292 (FIG. 10) welded on opposite ends. The tabs 292 are
pierced at 294 to accept bolts 296 for securing the box channels to
the undersides of the front rail 44 and back rail 46. The channels
290 are sufficiently close to one another that they do not
interfere with normal operation of the platform rocker springs 16
and sufficiently far apart that they do not interfere with normal
operation of the lock 18. The upper plate 298 of a swivel assembly
300 is secured to the channels 290 at 302. The lower plate 304 of
the swivel assembly 300 is secured at 306 on the top-center of a
large disk 308, e.g. of plywood or steel plate. The disk 308 has a
diameter preferably almost as large as the largest diagonal width
of the chair seat and arm frame. The large diameter of the disk is
what obviates the need for the chair base outriggers. Between the
plates of the swivel assembly is a circular set of roller bearings
(not depicted). Such swivel assemblies are presently commercially
available, preassembled.
Operation of the swivel variant of the chair is as described in
respect to the non-swivelling preferred embodiment, the swivelling
capability being an additional feature.
It should not be apparent that the rocker recliner chair as
described herein above possesses each of the attributes set forth
in the specification under the heading "SUMMARY OF THE INVENTION"
hereinbefore. Because the rocker recliner chair of the invention
can be modified to some extent without departing from the
principles of the invention as they have been outlined and
explained in this specification, the present invention should be
understood as encompassing all such modifications as are within the
spirit and scope of the following claims.
* * * * *