BLOC-O-LIFT Gas Spring0 pages

BLOC-O-LIFT Gas Spring
| general

BLOC-O-LIFT
| rigid, locking, can be mounted in any orientation

BLOC-O-LIFT
| rigid locking, vertical installation

The BLOC-O-LIFT gas springs are so-called
locking gas springs. They are used for
functions such as adjustments with force
support, damping, as well as innitely
variable locking. This is achieved with
a special piston valve system. If the
valve is open, BLOC-O-LIFT provides
force support and damping. If the valve
is closed, the gas spring locks and
provides high resistance to any motion.

Unlike the purely gas-lled BLOC-O-LIFT,
where the gas characteristics cause spring
locking, in this type of BLOC-O-LIFT, the
entire working range of the piston is lled
with oil. Depending on the installation of
so-called separating pistons, which separate the gas chamber from the oil chamber,
different locking forces can be achieved in
the extension or compression directions.
The maximum allowable locking force
depends on the extension force and/or the
overall device strength.

In this version of rigid locking gas springs,
the entire working range of the piston is
in oil, resulting in rigid locking, since oil
cannot be compressed. Unlike the orientation-independent BLOC-O-LIFT, separating
pistons were foregone in favor of lower
costs. Flawless function is maintained by
gravity; therefore, vertical or almost vertical
installation must be ensured.
Here, the alignment of the piston rod denes the locking behavior in the pull or push
direction.

Tube end tting

Pressure tube

Nitrogen

Piston package
With valve

Basically, there are two types of valve
design: a sliding valve with standard
actuation of 2.5 mm, and the seat valve
with an actuation of 1 mm for extremely
short actuation distances.
BLOC-O-LIFT can have spring or rigid
locking. The rigid locking version is
available as orientation-specic or nonorientation specic. Depending on the
application, BLOC-O-LIFT can be equipped
with a patented, corrosion-free actuation
tappet.
Primary application areas for BLOC-O-LIFT
gas springs are furniture manufacture,
medical technology, building technology,
aviation and aeronautics, automotive
design, and many industrial applications.

Oil

“PULL-LOCKED”

Nitrogen

Oil

• Very high oil locking force
• Can be installed in any orientation

Separating piston
Stickstoff

Guide and

Same areas of application as for the
BLOC-O-LIFT described before.

BLOC-O-LIFT OBT
| without locking in extension direction

A special form of this BLOC-O-LIFT gas
spring is the additional override function.
This function, which was designed for
special customer requests, is to protect
the application from overload.

BLOC-O-LIFT OBT permits comfortable upward movements of applications, such as
table tops, without the need to actuate a
release. This is made possible by a special
valve system in the piston package.

The override function is available for tension and compression direction; it can be
realized in locking gas springs featuring
orientation-independent or vertical installation. The override force can be freely
dened within certain limits.

In the compression direction, BLOC-O-LIFT
OBT can be locked in any direction.

Advantage:

Product Overview

Piston package
with valve and coil
compression spring

Usually, the OBT function of gas springs is
used in vertical installations.
Typical areas of application are table
adjustment systems in hospital nightstands
and in student furniture.

The BLOC-O-LIFT override function is used
in backrest and footrest adjustment of
chairs and beds, or in foot panel adjustments of treatment tables and beds.

• Cost-effective

Specic advantages:
Oil

“PULL-LOCKED“

BLOC-O-LIFT
| with override function

Specic advantage:

Piston package
with valve and
reset spring

sealing package

• Overload protection
Piston rod

“PUSH-LOCKED”

“PUSH-LOCKED”

Actuation tappet

Nitrogen

Nitrogen

Separating piston

Advantage:
• Innitely variable locking into position

Oil

Oil

BLOC-O-LIFT T
| with especially at spring characteristic curve

BLOC-O-LIFT
| actuation systems

STAB-O-SHOC HD15
| for low damping forces

STAB-O-SHOC HD24/29
| for high loads

STAB-O-SHOC TA20
| for the smallest installation lengths

BLOC-O-LIFT T is the design of a gas spring
with a particularly at spring characteristic curve, providing an almost even force
over the entire stroke. It provides precise,
comfortable adjustment and locking of the
application. BLOC-O-LIFT T stands out due
to its compact design and can be mounted
in any position. The actuation mechanism
can be operated by hand or foot, via lever
or Bowden cable.

Stabilus offers different actuation systems
for the BLOC-O-LIFT gas spring.

The standard STAB-O-SHOC HD15 is a nopressure hydraulic damper. STAB-O-SHOC
HD15 is orientation-specic and achieves
its optimum function in almost vertical installation with force transmission without
a return stroke, in one direction of movement. Horizontal special variations are
possible, as are models providing force
support during extension or length-controlled damping.

STAB-O-SHOC HD24/HD29 is a hydraulic
vibration damper for high loads. The
dampers are orientation-specic as standard.

The TA20 damper is a high-performance,
non-pressure, hydraulic vibration damper.
It is not orientation-specic, meaning that
force transmission without a return stroke
is possible in any installation position.
Equipping the outside of the pressure tube
with a diaphragm allows very short installation lengths.

The BLOC-O-LIFT T has been installed successfully in furniture, especially in single
and double-column tables, desks, nightstands, or height-adjustable desk tops.

Different release heads with lever are available for applications with direct actuation
on the gas spring.

Special

Release head with
lever for direct actuation

Bowden cables are used for indirect
actuation, i.e., not on the gas spring itself.
This system consists of a release head, a
Bowden cable, and the actuation unit.

Typical areas of application are automotive design, plant design, industrial
applications, and the furniture industry.
Here, the simple STAB-O-SHOC HD15 is
used as a motion damper in ap systems,
allowing gentle opening or closing.

separating piston

Oil

Specic advantage:
• Even force distribution over the entire
stroke
• Compact design with a long stroke

Equalization chamber

STABILUS also provides a wide range of
special forms, for example for force transmission without a return stroke in any
direction of movement. The characteristic
curve can be adapted individually at the
factory. Different piston variations allow
decreasing, progressive, or almost linear
curves. Pressure-loaded and length-controlled variations are also possible.

Equalization chamber
Separating piston

Individual Solutions for Many Applications
With its gas springs and hydraulic vibration dampers,
STABILUS is the world market leader with an annual production of more than 120 million units.
By now, the range of applications for STABILUS products is
nearly unlimited. In many areas, STABILUS products make
everyday life easier and simply more comfortable.

Equalization chamber

STABILUS is known for technical innovation, quality, and competitive pricing. Of course, individual, extensive consultation
and support with installation in the application can be taken
for granted with STABILUS.

Bottom valve

Oil

TA dampers are available in different dimensions, even for high loads. The damper
characteristic curve can be adapted to the
respective application at the factory.

Diaphragm

The STABILUS application consultants and technicians will
work out optimized solutions for you and will be glad to netune them with you on-site.

Specic areas of application in utility
vehicles are steering dampers in trailing
axles or medical technology, e.g., backrest
adjustments in hospital and nursing home
beds.

Areas of application are, among others,
seat dampers, washing machines, and
motion dampers with high force requirements for especially heavy aps.
One special design is the overrunning
brake damper in automotive design.

Nitrogen

Bowden cable

Stabilus GmbH
Wallersheimer Weg 100
56070 Koblenz
Germany
Telefon: ++49-261-8900-0
Fax:
++49-261-8900-204
E-Mail: info@de.stabilus.com

Equalization chamber

Oil

11/06

Separating piston

www.stabilus.de

Release head

Actuation unit

StabilusProdukte RZ.indd 2

02.11.2006 12:17:20 Uhr