U.S. patent number 3,650,578 [Application Number 04/856,738] was granted by the patent office on 1972-03-21 for quick disconnect slide structure.
This patent grant is currently assigned to Instrument Systems Corporation. Invention is credited to Herbert A. Bunin, Joseph T. Del Vecchio, John Howell.
United States Patent |
3,650,578 |
Del Vecchio , et
al. |
March 21, 1972 |
QUICK DISCONNECT SLIDE STRUCTURE
Abstract
A slide structure comprises a pair of slide members intercoupled
by a slide-bearing assembly for longitudinal relative movement
between contracted-retracted positions and advanced-extended, and
separated positions. A resilient arm is carried by one of the slide
members and releasably engages a shoulder on the other slide member
when the members are in an intermediate position. The arm is
movable to a retained retracted disengaged position, when the slide
members are in their intermediate positions, by being
longitudinally forwardly slideable along its slide member, or is
releasably locked in such position by a slideable lock member and
is released from its retracted position upon a predetermined
movement of the slide member. The bearing assembly upon extension
of the slide member is locked against rearward movement and is
released upon a predetermined contraction of the slide members.
Inventors: |
Del Vecchio; Joseph T. (Manuet,
NY), Howell; John (New City, NY), Bunin; Herbert A.
(Tappan, NY) |
Assignee: |
Instrument Systems Corporation
(West Nyack, NY)
|
Family
ID: |
25324387 |
Appl.
No.: |
04/856,738 |
Filed: |
September 10, 1969 |
Current U.S.
Class: |
384/18;
312/334.46 |
Current CPC
Class: |
A47B
88/57 (20170101); A47B 88/493 (20170101); A47B
2210/0032 (20130101); A47B 2210/0016 (20130101); A47B
2210/007 (20130101); A47B 2210/0081 (20130101); A47B
2210/0035 (20130101); A47B 2088/4235 (20170101); A47B
2210/0056 (20130101); A47B 2210/0059 (20130101) |
Current International
Class: |
A47B
88/04 (20060101); A47B 88/10 (20060101); F16c
021/00 () |
Field of
Search: |
;308/3.8,3.6
;312/348 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Schwadron; Martin P.
Assistant Examiner: Lazarus; R. H.
Claims
What I claim is:
1. A slide structure, comprising a pair of first and second
elongated slide members intercoupled for relative longitudinal
sliding between retracted and extended positions, and means located
on said slide members for releasably restricting said relative
sliding of said slide members from said retracted position to a
predetermined position short of said extended position, and
including a stop member mounted on said first slide member and
longitudinally movable along said first slide member between a stop
position and a releasably retained retracted position when said
slide members are in said predetermined position.
2. The slide structure of claim 1, including means on said second
slide member responsive to the relative movement of said slide
members for releasing said stop member from its retracted
position.
3. A slide structure comprising a pair of first and second
elongated slide members intercoupled for relative longitudinal
sliding between retracted and extended positions, and means located
on said slide members for releasably restricting said relative
sliding of said slide members from said retracted position to a
predetermined position short of said extended position, and
including stop member mounted on said first slide member and
movable between a stop position and a releasably retained retracted
position when said slide members are in said predetermined
position, said stop member comprising an arm mounted on said first
slide member and including a shoulder, said second slide member
having a stop shoulder, said shoulder on said first slide member
being resiliently transversely urged with said arm to an advanced
position in registry with the shoulder of said second slide member
when said slide members are in said predetermined position.
4. The slide structure of claim 3, wherein said arm is
longitudinally slideable on said first slide member between
advanced and retracted positions with said first shoulder forwardly
and rearwardly respectively of said second shoulder when said slide
members are in said predetermined position.
5. The slide structure of claim 4, including means on said slide
members for retracting said arm when said slide members are
relatively moved.
6. The slide structure of claim 3, wherein said second slide member
has an opening formed therein, an edge thereof defining said second
stop shoulder, said arm being accessible through said opening when
said slide members are in said predetermined position.
7. The slide structure of claim 3, including a longitudinally
extending locking member mounted on said first slide member and
longitudinally movable thereon between a first position retaining
said arm in its retracted position, and a second position releasing
said arm for movement to its advanced position.
8. The slide structure of claim 7, including means on said second
slide member for urging said locking member to its arm releasing
position when said slide members are moved toward their retracted
positions.
9. A slide structure, comprising a pair of longitudinally extending
parallel first and second slide members, a bearing assembly
including a ball bearing retainer movable relative to said slide
movable for slideably coupling said first and second slide members
for movement between advanced and retracted positions and slideable
along said second slide member between an advanced and retracted
position, and means releasable in response to the relative position
of said first slide member engaging said ball bearing retainer for
locking said bearing assembly in its advanced position.
10. The slide structure of claim 9, wherein said bearing assembly
comprises a longitudinally extending ball bearing retainer
including a cross-web having a longitudinal slot formed therein,
and said locking means comprises a resilient arm mounted on said
second slide member and urged into engagement with said slot when
registering therewith, said resilient arm including a cam surface
engageable by said first slide member to urge said arm to an
unlocked position during retraction of said first slide member.
11. The slide structure of claim 3, comprising a slide-bearing
assembly slideably intercoupling said first and second slide
members, and longitudinally movable relative thereto, and a
longitudinally extending locking member mounted on said first slide
member and longitudinally movable between an advanced position
retaining said arm in its retracted position and a retracted
position releasing said arm for movement to its advanced position,
and including a shoulder section longitudinally registering with
said retainer and adapted to engage said retainer upon retraction
of said first slide member to thereby retract said locking member.
Description
BACKGROUND OF THE INVENTION
The present invention relates generally to improvements in support
structures and it relates more particularly to an improved quick
disconnect slide structure for supporting drawers, racks, modules,
and the like for sliding movement and selective detachment and
separation.
It is often desirable to mount a drawer, rack, module, housing or
other device on a support structure or frame in a manner which
permits a sliding movement of the device between retracted and
extended positions and the selective separation of the device from
the support structure to provide complete access thereto, such as
for repair, replacement or the like. It is common to support such
devices by means of mutually slideable slide or track members,
which are secured to the support structure and supported device
respectively, and to releasably lock the slide members against full
extension and separation, to avoid accidental displacement.
However, such slide structures which have been heretofore employed
or proposed possess numerous drawbacks and disadvantages,
particularly when the slide supported device is heavy and bulky.
They are unreliable structures, oftentimes not locking if the
slides are opened rapidly, and they are awkward and difficult to
handle and manipulate when it is desired to separate the
slide-mounted device from the support structure, since the device
must be supported by both hands of the operator during the
separating operation. Common releasing means involved spring-loaded
releasing buttons operable by inserting a finger into a hole and
depressing the button, and simultaneously moving the device forward
to lock the button in release position, oftentimes skinning the
finger on the periphery of the opening. Attempts to avoid this
resulted in using spring-loaded pivoting bars which allowed a
larger opening to avoid the skinning problem, but still required
simultaneous depression of the release catch and longitudinal
movement of the device.
Further, the more elaborate slide assemblies used ball bearings as
the sliding means coupling the slide members. If a ball bearing
retainer were used, in reassembling the slide members, the retainer
would oftentimes move inwardly before it received the inner slide
member, making it awkward for the operator holding the drawer or
console, especially if it were heavy.
SUMMARY OF THE INVENTION
It is a principal object of the present invention to provide an
improved structure for mounting devices for movement between
retracted and extended positions.
Another object of the present invention is to provide an improved
positive-acting quick-release device mounting slide structure.
Still another object of the present invention is to provide an
improved slide structure which is releasably and positively locked
against full extension and separation.
A further object of the present invention is to provide an improved
releasable locking mechanism for a slide assembly, which is
positive-acting, easy and simple to release, and which is
automatically returned to a locked condition upon a predetermined
movement of the slide assembly.
Another object of the present invention is to maintain the ball
bearing retainer in fixed position, while the removed slide member
is being reinserted or reassembled.
A still further object of the present invention is to provide a
structure and mechanism of the above nature which is characterized
by its ruggedness, reliability, positive-acting, adaptability,
versatility and ease of operation.
The above and other objects of the present invention will become
apparent from a reading of the following description taken in
conjunction with the accompanying drawings, which illustrate
preferred embodiments thereof.
In a sense the present invention contemplates the provision of a
slide structure comprising at least a pair of first and second
elongated slide members intercoupled for relative longitudinal
sliding between retracted and extended positions, and means located
on said slide members for releasably restricting said relative
sliding of said slide members from said retracted position to a
predetermined position short of said extended position, and
including a first stop member mounted on the first slide member and
movable between a stop position and a releasably retained retracted
position when the slide members are in the predetermined position.
Another feature of the present invention resides in the provision
of a bearing assembly slideably supported by a second of the slide
members for movement between an advanced or forward position and
retracted or rearward position, and slideably supporting the first
slide member, and means automatically releasable by the retraction
of the first slide member for locking said bearing assembly in its
advanced position.
In the preferred form of the slide structure the slide members are
defined by at least two, but preferably three, telescopically
slideable confronting channel members, the legs of which define
bearing races. A retainer member contains a plurality of ball
bearings between confronting channel legs to afford free sliding
between the slide members with concurrent movement of the bearing
assembly. A retractable shoulder on the second slide member
restricts the retraction of the advanced bearing assembly, and
means on the first slide member effects the retraction of the
bearing assembly locking shoulder as the first slide member is
retracted to a predetermined position.
The second slide member has an opening formed in its cross-web
proximate its forward end, and a resilient latch arm is slideably
mounted on the first slide member and is provided with a
transversely projecting shoulder, which registers with the opening
when the slide members are short of their longitudinally separated
position. The latch arm is accessible through the opening and may
be depressed and advanced forwardly of the opening into sliding
engagement with the ball retainer cross-web where it is retained in
its retracted position. In the alternative, the latch arm is
provided with side wings, which releasably engage notches in the
sides of the second slide member, and a longitudinally slideable
latch retracting member is carried by the first slide member and is
movable between a rearward latch arm disengagement position and a
forward latch arm engagement position, the latch retracting member
being automatically returned to its rearward position upon
retraction of the slide members.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fragmentary inside elevational view of one form of a
slide assembly embodying the present invention;
FIG. 2 is an enlarged sectional view taken along line 2--2 in FIG.
1;
FIG. 3 is an enlarged sectional view taken along line 3--3 in FIG.
1;
FIG. 4 is a fragmentary inside elevational view of another
embodiment of the present invention, with the slide members shown
in a locked intermediate position;
FIG. 5 is a sectional view taken along line 5--5 in FIG. 4;
FIG. 6 is a sectional view taken along line 6--6 in FIG. 4;
FIG. 7 is a sectional view taken along line 7--7 in FIG. 4;
FIG. 8 is a sectional view taken along line 8--8 in FIG. 4;
FIG. 9 is a view similar to FIG. 5, with the slides illustrated
partially retracted; and
FIG. 10 is a sectional view taken along line 10--10 in FIG. 9.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawings, and particularly FIGS. 1 to 3
thereof, which illustrate a preferred embodiment of the present
invention, the reference numeral 10 generally designates an
improved slide assembly illustrated as applied to the slide
mounting in an opening of a drawer 11 or the like, on a support
frame of cabinet 12, a pair of assemblies 10 being employed on
opposite sides of the opening. As related to the present invention,
slide assembly 10 includes an intermediate slide member 13
slideable mounted on frame 12 in any suitable manner, such as by
means of a slide member 14 affixed to slide member 13 and supported
by frame 12 by an associated slide member 15 and slide bearings
15a. Slide member 15 is affixed to frame 12. An inner slide member
16 is affixed to the side wall of drawer 11 in any convenient
manner, such as screws, bolts, brackets, or the like, and
longitudinally slideably registers with slide member 13.
Slide member 13 is channel-shaped and includes a cross-web 17 and
upper and lower inwardly directed flanges 18, terminating in
underfolded transversely cylindrical sections defining longitudinal
outer races 19. The inner slide member 16 is likewise
channel-shaped, and includes an inner cross-web 20 and outwardly
directed cylindrical race-defining flanges 21 spaced from and
confronting corresponding races 19. Registering circular access
opening 22 and 23 are formed in the webs of slide members 13 and 14
respectively, proximate their forward ends; the cross-web 17 of
slide member 13 having front and rear tongues 24 and 26,
respectively formed therein on opposite sides of opening 22, with
tongues 24 and 26 being inwardly inclined as they approach opening
22 to form cam surfaces 27 and 28 respectively and terminating in
inwardly offset stop shoulders 29 and 30 bordering the front and
rear of opening 22.
Slide members 13 and 16 are slideably coupled by a slide-bearing
32, which comprises a ball-retainer or ball-spacer 33 including a
cross-web 34 bearing at its outer edges on web 17, and having an
inwardly offset intermediate section 36, which terminates at a
point forwardly of the trailing end of retainer 33. Projecting
inwardly from opposite edges of retainer web 34 between races 19
and 21 are flanges 37 having longitudinally spaced openings which
engage balls 38, which are of larger diameter than the openings and
are entrapped between confronting races 19 and flanges 37. Stop
ears or pins 39 are formed at the front end of web 17 to prevent
the separation of slide bearing 32.
Formed in slide member cross-web 20, proximate its rear end, are
relatively long and short front longitudinally extending
rectangular openings 40 and 41 respectively, separated by a
crosspiece 42. Integrally formed with web 20, and outwardly offset
relative thereto, is a plate section 43 parallel to web 20 and
extending from the front border of opening 40 to a point short of
crosspiece 42. At the rear border of opening 41 is an outwardly
offset ear 44 parallel to and integrally formed with web 20.
Means for releasably restraining slide member 16 from advancing out
of engagement with slide member 13 includes a latch member 46,
slideably supported by slide member 16 and formed of a strip of
resilient material such as a spring steel or the like. Latch member
46 includes a rectangular front tail section 47, registering with
and of smaller length than opening 40 and slideably engaging the
inner face of section 43. Tail section 47 terminates in a
rear-outwardly directed shoulder 48, confronting the front edge of
crosspiece 42 and connected to a rearwardly-outwardly inclined
strip section 49, disposed outwardly of crosspiece 42 and opening
41. The rear part of section 49 is bifurcated by a triangular slot
25 formed therein, and terminates in a pair of spaced, outwardly
directed bent legs 50, which are integrally formed with a
rearwardly-inwardly inclined rectangular latch plate 51 having
longitudinally projecting front and rear coplanar fingers 52 and
53. It should be noted that latch plate 51 and fingers 52 and 53
are of lesser length than opening 22 in slide 13, and are movable
into engagement therewith, with the edge of finger 52 engaging
shoulder 29, and the end of finger 53 being spaced inwardly of the
inner edge of shoulder 30. The rear border of latch plate 51 is
joined by a pair of transversely spaced, upwardly-inwardly inclined
legs 54 to a flat crosspiece 56, which slideably engages the front
face of ear 44 and is limited in its rearward movement by a
shoulder 57 at the rear border of opening 41.
The retainer web section 36 is of such length, the openings 22 and
23 so disposed in slide members 13 and 14 respectively, and latch
member 46 so relatively located, that when slide-bearing 32 is in
its forward position with slide member 16 advanced to its forward
latched position, openings 22 and 23 are uncovered by retainer web
section 36 to provide access to latch plate 51.
An interlock or lock lever 58 is pivoted to the rear end of slide
member 14, and functions to releasably lock the slide members in
their fully extended positions, and forms no part of the
invention.
Considering now the operation of the mechanism described above,
when slide members 13 and 16 are in their extended latched
intermediate position, as illustrated in the drawings, latch plate
51 registers with opening 22 in slide member 13, with finger 52
bearing on shoulder 29 of slide member 13 to prevent any further
advance of slide member 16, slide-bearing 32 is in its forward
position exposing openings 22 and 23, and latch member 46 is in a
relatively retracted position. If it is desired to further extend
and separate slide members 16 from slide members 13 so as to detach
drawer 11, each latch plate 51 is finger-pushed inwardly by access
through openings 22 and 23, and latch member 46 is advanced
forwardly along slide member 16 (to the left as viewed in FIG. 2)
until finger 52 slideably engages the inside face of tongue 24,
whereby to release slide member 16 for advance and detachment from
slide member 13. Drawer 11 may then be pulled and separated from
frame 12.
To replace drawer 11 and recouple slide members 13 and 16, they are
reconnected mereby by slideably inserting slide members 16 into
corresponding slide members 13, and pushing them rearwardly (to the
right as viewed in FIGS. 1 and 2). Inclined legs 54 of latch member
46 engaging the leading edge of retainer web 36 cause latch plate
51 to move or be biased inwardly, so that it may slide along the
inside face of retainer web 36, past the trailing edge of web 36
where it is then released to spring outwardly of the plane of web
36, as seen in the drawings.
Forward movement of slide member 16 from its retracted position
moves latch plate 51 inwardly along cam surface 28 of slide member
13, and rearwardly along slide member 16 until it registers with
opening 22, where it snaps into engagement with its periphery. When
latch plate 51 engages the periphery of opening 22, finger 53 is
generally aligned with shoulder 30 of slide member 13, so that
rearward movement of slide member 16 is prevented until latch plate
51 is pushed inwardly to clear shoulder 30, and permit the free and
unimpeded retraction of slide member 16 into slide member 13. This
lockout holds the slide in its forward position. If this lockout
feature is not desired, cam surface section 28 can be eliminated,
so that shoulder 30 is positioned outwardly of finger 53 and cannot
be engaged by finger 53 when slide member 16 is urged rearwardly
allowing unimpeded movement of slide member 16 into slide member
13.
Referring now to FIGS. 4-10 of the drawings, which illustrate
another embodiment of the present invention, the reference numeral
63 designates the improved slide assembly, which is employed in the
manner of that first described, and includes an outer slide member
64 suitably slidably mounted on frame 65, and preferably slidable
relative thereto by means of a cooperating slide and bearing
assembly 60 slideably mounted to a slide member 59, affixed to
frame 65, an inner slide member 66 affixed to the sidewall of
drawer 67, and slide-bearing assembly 68 slideably coupling members
64, 66.
Outer slide member 64 is channel-shaped and includes an outer
vertical cross-web 69 provided along its upper and lower edges with
race-defining, shaped, inwardly directed flanges 70. A rectangular
recess 71 is formed in the front end of web 69 and inwardly
directed flanges 72 are integrally formed along its longitudinal
edges spaced from and parallel to flanges 70. The front and rear
edges 73 and 74 respectively, of flanges 72 define cam surfaces
which are forwardly and rearwardly inwardly inclined respectively,
and a rectangular latching notch 76 is formed in the inner edge of
each flange 72.
A medial rectangular slot 77 is formed in outer vertical web 69
rearwardly of recess 71, as seen best in FIG. 6. A slide-bearing
latch member 78 registers with slot 77 and is cantileverly secured
to web 69 at the rear border of slot 77. Latch member 78 is formed
of a resilient metal strip and includes an inwardly-forwardly
inclined outer section 79 extending from the rear border of slot 77
(to the right as viewed in FIG. 6) to a point rearwardly of the
front edge of slot 77, and an inner section 80, provided with a
rear tail 81, superimposed on the rear part of outer section 79 and
riveted therewith on web 69, adjacent to the rear border of slot 77
by fasteners 75. Section 80 terminates at its front in a tab 82
overlying and joined, such as spot welded, to the front end of
section 79, and provided at its rear edge with an inwardly
directed, stop-defining shoulder 83, perpendicular to tab 82. The
inner end of shoulder 83 and the front end of tail 81 are joined by
integrally formed cam, defining rearwardly and forwardly,
inwardly-inclined, converging sections 84 and 86, respectively.
Latch member 78 is normally resiliently urged to a latch position
inwardly of web 69, and may be outwardly retracted to swing about
its rear end to a bearing release position.
Slide bearing assembly 68 is disposed between race 70 of slide
member 64 and flanges 97 of slide member 60 and comprises a
ball-retainer or ball-spacer 87 including a vertical medial
cross-web 88 spaced inwardly from outer slide member web 69,
outwardly offset longitudinal sections 89, engaging the inner face
of outer slide member web 69, and inwardly directed flanges 90
spaced from flanges 70. Flanges 90 are provided with longitudinally
spaced apertures, in which balls 91 of larger diameter rest, and
which are entrapped between flanges or races 90 and 70, and project
to the opposite sides of flanges 90.
As seen best in FIGS. 5, 6, and 9, a medial longitudinal slot 92 is
formed in ball-retainer web 88, and when slide bearing assembly 68
is in its forwardmost position with the front edge of ball-retainer
88 abutting rear shoulders 94 of flanges 72, latch member 78 is
resiliently urged through slot 92 in ball-retainer web 88, with
latch shoulder 83 confronting and engaging the front edge of slot
92 to releasably lock slide-bearing assembly 68 in its forward
position. Abutments are formed on the rear of outer slide member
web 69 to restrict the rearward movement of slide-bearing assembly
68.
Inner slide member 66 longitudinally slideably registers with outer
slide member 64 and includes a cross-web 96 abutting and secured to
a side wall of drawer 67 in any convenient manner, such as bolts
118, and outwardly directed, race-defining flanges 97 confronting
races 70 and engaging balls 91. Cross-web 96 is offset from and
projects rearwardly of flanges 97 to define a tongue 98. As seen in
FIG. 5, a longitudinally extending slot 99 is formed in cross-web
96 in the rear section thereof, and is transversely enlarged
proximate the rear part thereof. A stop member 100 is secured to
the outer face of web 69 proximate the rear end of slot 99, and
includes an outwardly offset shoulder 101 registering with the rear
part of slot 99.
A latch member 102 is affixed to the outer face of web 96 of slide
member 66 in register with slot 99, and is formed of resilient
metal. Latch member 102 includes a rearwardly-outwardly inclined
elongated arm 103, secured at its forward end by rivets 115, or the
like, to the outer face of inner slide member web 96 at the front
border of opening 99. Integrally formed and coplanar with the rear
end section of resilient arm 103 are transversely-projecting
opposite latch wings 104, and a relatively sharply
rearwardly-inwardly inclined arm 106 projects longitudinally from
the rear end of arm 103, and terminates in a rearwardly projecting
ear 107, bearing on the inner face of shoulder 101 to restrict the
outward movement of latch member 102.
A longitudinally extending latch-retracting member 108 is
positioned along the outer face of slide member web 96, and
includes a medial longitudinal web 109, parallel to and spaced
outwardly from web 96, and inwardly directed top and bottom flanges
105, which terminate in oppositely directed lips slideably
registering with the longitudinal corners between web 96 and races
97, to support retracting member 108 for relative longitudinal
sliding movement. A longitudinal slot 110 is formed in web 109, and
is engaged by a large flat-headed rivet 111, which limits the
longitudinal movement of retractor member 108, so that when
retractor member 108 is moved to its rearward position, the rear
edge of web 109 moves rearwardly along resilient inclined arm 103
to retract latch member 102 inwardly into slot 99, as viewed in
FIG. 9. When retractor member 108 is returned to its forward
position, latch member 102 is released to resiliently swing out of
slot 99 to its outermost position as restricted by ear 107 and
shoulder 101, as shown in FIG. 5. The forward end of web 109
terminates in an outwardly directed finger 112 to aid in grasping
and moving.
An interlock 119 is pivotally mounted to the rear end of slide
member 64, and functions to releasably lock the cabinet slide
member to the intermediate slide member in their fully extended
positions, and forms no part of this invention.
Considering now the operation of the improved slide assembly 63
last described, when slide members 64 and 66 are in their
relatively retracted condition, slide bearing assembly 68 is in its
rearmost position, retractor member 108 is in its forward position
releasing latch member 102, which resiliently slideably bears on
the inner face of retainer web 88 as shown in FIG. 9, and
slide-bearing latch member 78 is inwardly sprung to slideably bear
on the outer face of web 96.
As drawer 67 is pulled forwardly, slide member 66 and slide-bearing
assembly 68 move forwardly along slide member 64. Toward the end of
the initial withdrawal movement of drawer 67, latch wings 104 of
latch member 102 engage cam surface 74 of flange 72 to retract
latch member 102 inwardly, until wings 104 register with notch 76,
and snap into engagement therewith, to prevent any further sliding
of latch member 102 and slide member 66 in a forwardly or
rearwardly direction. In the locked position of inner slide member
66, ball-retainer member 88 abuts shoulder 94 of flange 72 to
prevent its forward movement, and latch member 78 springs inwardly
into engagement with slot 77, with shoulder 83 confronting the
front end edge of slot 77, as shown in shadow in FIG. 6 to hereby
prevent the rearward movement of slide bearing assembly 68.
In order to permit the separation or removal of drawer 67 from
frame 65, retractor member 108 is manually pushed rearwardly by way
of finger 112, so that the rear edge of web 109 slides rearwardly
along inclined arm 103 of latch member 102, to retract wings 104
out of engagement with notches 76 in flange 72 and permit the easy
withdrawal and separation of slide members 66 from slide bearings
68 and slide members 64, without restricting the position of the
hands in the withdrawal.
To reassemble the slide members, the rear ends of inner slide
members 66 are inserted into the front ends of slide members 64, as
directed by opposite plastic bearing guides 113 at the front ends
of slide members 64, and are pushed rearwardly. Slide bearings
assembly 68 will remain stationary in its locked position to
receive its corresponding ends of slide members 66, until the rear
edge of tongue 98 on slide member 66 engages and rides along cam
arm 84 to outwardly retract latch member 78 and shoulder 83,
whereupon slide assembly 68 will move rearwardly to its rearmost
position with the full retraction of slide members 66. While
slide-bearing assembly 68 is in its locked forward position, balls
91 will rotate about their own axes and provide some drag on moving
slide member 66, since there is no rolling movement of the balls
until assembly 68 moves relatively with slide members 66. As slide
member 66 approaches its retracted position, the front edge of
slower moving retainer web 96 engages the rear face of finger 112
of retractor member 108 to move retractor member 108 to its
forwardmost position along web 96 whereby to release latch member
102. It should be noted that when wings 104 engage notches 76,
retractor member 108 must be shifted rearwardly to unlock slide
member 66 for either forward or rearward movement.
While one form of slide assembly is shown, other common types may
be used with the present invention, such as three telescoping
members with the inner slide member attached to the drawer and the
outer slide member attached to the cabinet. If three slide members
are used, an interlock should be used between intermediate and
outer members.
Inner slide members 15 and 59 allow slides 13 and 64, respectively,
to telescope outwardly to a greater distance, and have not been
discussed in greater detail.
As used in the specification and claims, "extended position" refers
to the maximum relative position that the slide member attached to
the drawer is supported by the slide member to which it is
slideably coupled. This latter slide member could be the
intermediate slide member in a three part slide or inner slide
member in a two part assembly.
While there have been described and illustrated preferred
embodiments of the present invention, it is apparent that numerous
alterations, omissions and additions may be made without departing
from the spirit thereof.
* * * * *