U.S. patent application number 14/445399 was filed with the patent office on 2015-02-05 for linear actuator.
This patent application is currently assigned to Limoss US, LLC. The applicant listed for this patent is Limoss US, LLC. Invention is credited to Martin Kristen.
Application Number | 20150033885 14/445399 |
Document ID | / |
Family ID | 50670602 |
Filed Date | 2015-02-05 |
United States Patent
Application |
20150033885 |
Kind Code |
A1 |
Kristen; Martin |
February 5, 2015 |
Linear Actuator
Abstract
A linear actuator to provide the moving force for adjustable
furniture, such as beds, chairs or tables. The linear actuator
includes a drive assembly, rigid arm, and linkage assembly. The
rigid arm includes a pusher block with one or more attachment means
where the linkage assembly is attached.
Inventors: |
Kristen; Martin; (Wetter,
DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Limoss US, LLC |
Baldwyn |
MS |
US |
|
|
Assignee: |
Limoss US, LLC
Baldwyn
MS
|
Family ID: |
50670602 |
Appl. No.: |
14/445399 |
Filed: |
July 29, 2014 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61862409 |
Aug 5, 2013 |
|
|
|
Current U.S.
Class: |
74/89.23 |
Current CPC
Class: |
A47C 1/0242 20130101;
F16H 25/18 20130101; F16H 2025/2043 20130101; A47C 1/0246 20130101;
F16H 2025/2481 20130101; Y10T 74/18576 20150115; F16H 2025/204
20130101; F16H 25/16 20130101; A47C 20/042 20130101; Y10T 29/49826
20150115; F16H 25/20 20130101; F16H 25/24 20130101; F16H 2025/2031
20130101; A47C 20/041 20130101 |
Class at
Publication: |
74/89.23 |
International
Class: |
F16H 25/20 20060101
F16H025/20; F16H 25/16 20060101 F16H025/16 |
Claims
1. A linear actuator comprising a reversible drive assembly, rigid
arm assembly and linkage assembly; said drive assembly comprising a
controller means and a drive means; said rigid arm assembly
comprising an outer structure, a threaded spindle, a spindle nut,
and a pusher block, where the threaded spindle is retained within
the outer structure and attached to the drive assembly and outer
structure in such a fashion as to allow the threaded spindle 8 to
rotate when force is applied from the drive assembly; said spindle
nut is threaded onto the threaded spindle and attached to the
pusher block; said pusher block is attached to the spindle nut and
the pusher block straddles the outer structure; said linkage
assembly is attached to the pusher block by a plurality of
attachment means; as the threaded spindle is rotated by the drive
assembly the spindle nut moves along the threaded spindle, which
moves the pusher block along the outer structure; and movement of
the pusher block moves the linkage assembly, which causes
adjustment of the adjustable furniture.
2. The pusher block of claim 1 where the attachment means extends
from the right side of the pusher block.
3. The pusher block of claim 1 where the attachment means extends
from the left side of the pusher block.
4. The pusher block of claim 1 where the attachment means extends
from the top of the pusher block.
5. The pusher block of claim 1 where the attachment means extends
from the right side of the pusher block and the top of said pusher
block.
6. The pusher block of claim 1 where the attachment means extends
from the left side of the pusher block and the top of said pusher
block.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
TABLE-US-00001 [0001] -- -- Kristin 61-862409 August, 2013 Kristin
20110298323 December, 2011 Brieschke 20090308187 December, 2009
Schmid
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[0002] Not Applicable
REFERENCE TO SEQUENCE LISTING, A TABLE, OR A COMPUTER PROGRAM
LISTING COMPACT DISC
[0003] Not Applicable
DESCRIPTION
[0004] 1. Field of the Invention
[0005] The present disclosure reveals a new design for a linear
actuator that modifies the positioning in adjustable furniture. A
linear actuator is an actuator that creates motion in a straight
line, which is widely used within the area of adjustable furniture,
where they are used to adjust the position of adjustable furniture
such as the lifting and reclining of motion chairs, the height of a
table, or the position of the mattress surface of a bed.
[0006] 2. Background of the Invention
[0007] Prior art of linear actuators reveals drive assembly, a
rotating member and an extending member or a drive assembly and
rigid arm and pusher block. In the first category, the rotating
member is threaded and rotated by the drive assembly. The extending
member cannot rotate and is threaded in conjunction with the
rotating member. As the rotating member is rotated the extending
member is extended or retracted relative to the location of the
drive assembly, which also extends the overall length of the linear
actuator. In the second category of prior art, the linkage assembly
is attached to both sides of the pusher block.
[0008] The present disclosure reveals a linear actuator comprising
a reversible drive assembly, rigid arm assembly and linkage
assembly where the linkage assembly attaches to both sides of the
pusher block or to one side of the pusher block and the top portion
of the pusher block. The linear actuator is attached to a piece of
adjustable furniture by means of a rear mounting bracket and by
means of a linkage assembly. The rear mounting bracket stabilizes
the linear actuator relative to the adjustable furniture, while the
linkage assembly facilitates the adjustment of the adjustable
furniture.
[0009] The reversible drive assembly comprises a control means for
operating the linear actuator and a drive means for supplying the
forces necessary to manipulate the linear actuator. The drive
assembly is attached to the rigid arm assembly by an attachment
means and provides the force by which the adjustable furniture is
adjusted.
[0010] The rigid arm assembly comprises an outer structure, a
threaded spindle, a spindle nut, and a pusher block. The threaded
spindle is attached to the reversible drive assembly and the outer
structure of the rigid arm in such a way as to allow the threaded
spindle to rotate axially. The spindle nut is attached to the
threaded spindle and the pusher block. The pusher block also
straddles the outer structure and is secured in linear recesses
that run the length of the outer structure. As the reversible drive
assembly turns the threaded spindle, the spindle nut is moved along
the threaded spindle and the spindle nut in turn moves the pusher
block along the outer structure. The linkage assembly is attached
to the pusher block by a plurality of attachment means located on
either side of the pusher block or the top of the pusher block. As
the reversible drive assembly rotates the threaded spindle, the
spindle nut moves along the threaded spindle causing the pusher
block to move along the outer structure. Movement of the pusher
block adjusts the linkage assembly and causes the adjustment of the
adjustable furniture.
[0011] Several attempts have been made to develop a linear actuator
but all involve a system distinct from the present disclosure.
Prior art can be generally described as including a drive assembly,
a rotating member and an extending member. The rotating member is
threaded and rotated by the drive assembly. The extending member
cannot rotate and is threaded in conjunction with the rotating
member. As the rotating member is rotated the extending member is
extended or retracted relative to the location of the drive
assembly, which also extends the overall length of the linear
actuator.
[0012] In U.S. Pat. App. 20110298323, Brieschke discloses a linear
actuator that includes an input member that rotates, an output
member attached to the input member by means of a nut and with a
flanged portion that extends into a guide rail that runs the length
of the outer casing of the linear actuator. The flanged portion
prevents the output member from rotating while the input member is
rotating. As the input member is rotated, the output member moves
along the axis of the input member and extends or retracts the
output member away from the drive mechanism and adjusts the overall
length of the linear actuator. The present disclosure reveals a
pusher block attached to the threaded spindle, where the pusher
block is moved along the threaded spindle as the threaded spindle
is rotated but the overall length of the present disclosure never
changes.
[0013] In U.S. Pat. App. 20090308187, Schmid discloses a linear
actuator that includes a drive mechanism, an inner tube that
rotates and an outer tube that does not rotate. As the inner tube
rotates the outer tube is extended or retracted, extending the
overall length of the linear actuator. The present disclosure
reveals a pusher block attached to the threaded spindle, where the
pusher block is moved along the threaded spindle as the threaded
spindle is rotated but the overall length of the present disclosure
never changes.
SUMMARY OF THE INVENTION
[0014] A linear actuator comprising a reversible drive assembly,
rigid arm assembly and linkage assembly for use with adjustable
furniture. The reversible drive assembly comprises a control means
for operating the linear actuator and a drive means for supplying
the forces necessary to manipulate the linear actuator. The drive
assembly is attached to the rigid arm assembly by an attachment
means and provides the force by which the adjustable furniture is
adjusted.
[0015] The rigid arm assembly includes a rigid arm assembly, a
threaded spindle, a spindle nut, a pusher block, and a linkage
assembly. The threaded spindle is attached to the reversible drive
assembly and the outer structure of the rigid arm in such a way as
to allow the threaded spindle to rotate axially. The spindle nut is
attached to the threaded spindle and the pusher block. The pusher
block also straddles the outer structure and is secured in linear
recesses that run the length of the outer structure. As the
reversible drive assembly turns the threaded spindle, the spindle
nut is moved along the threaded spindle and the spindle nut in turn
moves the pusher block along the outer structure. The linkage
assembly is attached to the pusher block by a plurality of
attachment means located on either side of the pusher block or the
top of the pusher block. As the reversible drive assembly rotates
the threaded spindle, the spindle nut moves along the threaded
spindle causing the pusher block to move along the outer structure.
Movement of the pusher block adjusts the linkage assembly and
causes the adjustment of the adjustable furniture.
[0016] In one preferred embodiment of the pusher block the
plurality of attachment means includes the attachment means
extending from the right side of the pusher block.
[0017] In a second preferred embodiment of the pusher block the
plurality of attachment means includes the attachment means
extending from the left side of the pusher block.
[0018] In a third preferred embodiment of the pusher block the
plurality of attachment means includes the attachment means
extending from the top of the pusher block.
[0019] In a fourth preferred embodiment of the pusher block the
plurality of attachment means includes an attachment means
extending from the right side of the pusher block and an attachment
means extending from the top of the pusher block.
[0020] In a fifth preferred embodiment of the pusher block the
plurality of attachment means includes an attachment means
extending from the left side of the pusher block and an attachment
means extending from the top of the pusher block.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
[0021] FIG. 1 is an objective view of the disclosed linear
actuator;
[0022] FIG. 2 is an objective view of an alternative embodiment of
the disclosed linear actuator;
[0023] FIG. 3 is a cross sectional view of an alternative
embodiment of the disclosed linear actuator;
[0024] FIG. 4 is a side view of the disclosed linear actuator;
DETAILED DESCRIPTION OF THE INVENTION
[0025] A linear actuator 1 comprising a reversible drive assembly
2, rigid arm assembly 3 and linkage assembly 4. The reversible
drive assembly 2 comprises a controller means and a drive means
6.
[0026] The reversible drive motor assembly 2 is connected to the
rigid arm assembly 3. The rigid arm assembly 3 an outer structure
7, a threaded spindle 8, a spindle nut 9, and a pusher block 10.
The threaded spindle 8 is retained within the outer structure 7 and
attached to the drive assembly 2 outer structure 7 in such a
fashion as to facilitate the threaded spindle 8 being allowed to
rotate. The spindle nut 9 is threaded onto the threaded spindle 8
and attached to the pusher block 10. The pusher block 10 is
attached to the spindle nut 9 and the pusher block 10 straddles the
outer structure 7. The pusher block 10 is attached to the linkage
assembly 4 and the linkage assembly is attached to the adjustable
portion of the adjustable portion of the adjustable furniture.
[0027] As the threaded spindle 8 is rotated by the reversible drive
assembly 2 the spindle nut 9 moves along the threaded spindle 8,
which moves the pusher block 10 along the outer structure 7.
Movement of the pusher block 10 moves the linkage assembly 4, which
causes adjustment of the adjustable furniture.
* * * * *