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Патент USA US3044116

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July 17, 1962
Filed Nov. 30, 1959
Fig. 2
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FRANK /? Zack/M652
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Patented July 17, 1962
Frank P. Lackinger, 529 Allen Ave, MeKees Rocks, Pa.
Fiied Nov. 30, 1959, §er. No. 856,071
2 Claims. (Cl. 16—44)
the aligned holes 17 for receiving the shaft 18 that ro
'tatably supports the roller 20 within the slide 12.
As shown in FIG. 3 the slot 3 is cut larger than the
roller 20 and may also be cut out showing the bottoms
of the legs 13 as illustrated in this view.
ment to the bottom of hollow legs of furniture and more
In securing the guide 5 to the bottom 2 of the cup 1
the bottom may be provided with the small openings 21
into which the projections 22 on the ends of the legs v6
particularly to resiliently extended rollers for supporting
are secured.
This invention relates generally to rollers" for attach
When the guide 5 is soured in this manner to the bot
chairs which rollers move upwardly into the hollow legs 10
tom 2 of the cup 1 the roller 20‘ is mounted between I
of the chair when the latter is occupied.
A principal object of this invention is the provision
of an improved furniture roller that may be readily as
sembled and disassembled upon manufacture and for the
the legs 13 of the slide 12 and the shaft 18 is inserted ,
through the aligned holes 17 and to rotatably support
the roller 20 therein. The ?anges 15 of the end section
purpose of readily removing the roller for cleaning the 15 14 of the slide do not extend beyond the surface of
the legs 13 which permits the slide with the roller 20
mounted therein to be inserted between the legs 6 at the
Another object of this invention is the provision of an
window indicated at 23. The slide may be cocked
improved chair roller support structure containing a
slightly so as to insert the roller and the lower ends of
spring biased roller rotatably supported in a slide that has
limited travel within the support which determines the 20 the legs 13 through the window 23 of the guide 5 and
when the ?rst ?ange 15 passes under the ?ange 8 the
extent of the projection of the roller.
slide is straightened and permitted to drop into position
Another object is the provision of a retractable chair
as shown in FIG. 1. With the slide in position as shown
supporting roller that is held in assembled position by
in FIG. 1 the ?anges 15 engage the stops 11 and limit
the compressing of a spring into its biased position.
Another object is the provision of a resiliently spring 25 the extension of the roller 20 through the slot 3 as shown
in FIGS. 1 and 2. The inner surface of the legs 6 of
biased roller rot-stably supported in a slide reciprocal in
the guide 5 thus retain the shaft 18 in position regardless
a guide with the spring disposed directly above the roller
of the up and down movement of the slide within this
and extended between the slide and guide members with
sockets in the members to retain the spring in position.
Other objects and advantages appear in the following 30 When the slide is in this lower positionv as shown in
FIGS. 1 and 2 the spring 24 may be compressed and
description and claims.
inserted between the sockets 9 and 16 of the guide and
The accompanying drawings show for the purpose of
slide respectively and the ?anges 8 and 15 will there
exempli?cation but without limiting the invention or
after retain the spring in its proper position. If it is
claims thereto, certain practical embodiments of the in
35 desired to remove this spring, one can employ a screw
vention wherein:
driver or any hard member to partially compress the
FIG. 1 is a view in vertical section of the structure
spring and draw its end out of one of the sockets 9 and
comprising this invention.
16 and thus disassemble the structure. Thus if the rollers '
FIG. 2 is a view taken at right angles to that shown in
20 become gummy or ‘dirt lodges within the slide 12
FIG. 1 with the cup member shown in section.
FIG. 3 is a bottom plan view of the roller comprising 40 and around the shaft 18, the cup may be removed from
the end of the furniture leg and the parts disassembled
this invention.
and cleared and replaced.
FIG. 4 is a perspective exploded view of the parts
‘It is preferable to make this structure from a good
making up this invention.
quality metal such as ‘stainless steel. It is also prefer
Referring to the drawings the chair roller consists of
the annular cup 1 which is provided with a bottom 2 45 able to employ a spring that is sui?ciently strong to sup
port‘the weight of the chair alone but when one places
having the roller slot 3 in the center thereof. An up
an object or sits on a chair this additional weight causes
standing annular wall 4 surrounds the perimeter of the
the springs in each of the four rollers to compress the
cup and is shaped to receive the bottom of the hollow
spring and cause the bottom of the cup to engage the
legged furniture, there being ample clearance. The fur
niture leg is preferably inserted into the cup and snugly 50 ?oor surface and thus prevent the chair from otherwise
sliding or moving with ease. When the weight is re
?ts the inner face of the upstanding annular wall 4. Thus
moved from the chair the springs again extend the rollers
the Wall 4 has to be constructed to properly mate with
29 and the chair is readily movable along the ?oor sur
the bottom of the furniture leg. The U-shaped guide
face. Ordinarily, the more weight of the chair is insu?i
member 5 has the depending legs 6 connected at their
upper end by the top section '7 having the downwardly 55 cient to cause the rollers to ‘create indentations on the
?oor covering and when the chair is occupied the only
turned ?ange portions 8 which form the socket 9 there
pressure applied to the line contact of the roller against
'between on the under side of the top section 7. Half
the ?oor surface is that of the pressure of, the spring.
the length of the legs 6 are provided with the ?anges
10 on both sides of the U-shaped guide member. The
I claim:
1. A chair roller compirsing a cup having an upstand
top surface 11 of these ?anges 1t} lie in a common, hori 60
zontal plane and function as a stop for the slide mem
ber 12. The slide member 12 is also a U-shaped mem
ing annular wall and a bottom with a transverse roller
slot therein, an inverted U-shaped guide frame having
a connected frame end at the top with a spring socket
therein, spaced parallel frame legs extending from said
guide member 5 which legs are connected by the cross
end section 14, the ends of which are provided with the 65 connected frame end, the other ends ‘of said frame legs
secured to the bottom of said cup on opposite sides of
upstanding ?anges 15 that form the socket 116 that op- '
said roller slot, opposed inturned coextensive ?anges on
poses the socket 9 of the guide member. The ?anges 15
the adjacent edges of said frame legs and extending up
engage the stops 11 to limit the downward travel of the
wardly from said cup bottom and stopping in spaced
slide within the guide and the legs 13 of the slide stop
70 relation from said connected frame end to provide a
short of the under side of the bottom 2 as shown in
stop on the ends of said ?anges, means de?ning a win
FIG. 2. The legs 13 of the slide 12 are provided with
ber having the legs 13 which ‘slide within the U-shaped
' 3,044,102
'dow on opposite sides of said frame between said ?ange
stops and said connected frame end, a slide having a
top with oppositely projecting shoulders and a socket
opposed to said frame socket, spaced depending legs from
said top and having slidable contact between said guide 5
frame legs and retained therein by said ?anges, a shaft -
supported in aligned holes in’said slide legs and retained
-by said frame legs, a roller mounted on said shaft be
tween said slide legs to extend through said slot, said
shoulders on said slide top engaging said stops on said 10
'?anges to limit the projection of said roller through said
slot, ‘said windows vpermitting said slide and roller to be
2. The chair roller of claim 1 characterized in that
said roller slot in said cup bottom is open to expose the
under side of said slide to permit dirt to drop from the
chair roller.
References Gated in the ?le of this patent
Wolfe _______________ __ Ian. 22, 1901
Andresen ____________ __ Jan. 11, 1949
Edhlund _____________ __ July 10, 1951
Lackinger ___________ __ Mar. 17, 1959
inserted therethrough to its operating position between
said frame leg ?anges, and a spring mounted through
said widnow and having its ends engaging in said opposed
sockets under partial compression to project said roller
‘ _ through said slot.
Great Britain _________ __ Aug. 26, 1953
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