Spring devices – Vehicle – Comprising compressible fluid
Patent
1991-08-12
1994-04-05
Graham, Matthew C.
Spring devices
Vehicle
Comprising compressible fluid
188 67, F16F 902, F16F 1100, A61N 506
Patent
active
052997871
DESCRIPTION:
BRIEF SUMMARY
The present invention pertains to a gas-spring arrangement in which the so-called gas spring includes a substantially tubular outer casing and a rod which is guided for axial movement in the tubular casing, between two terminal positions and is dampened with the aid of gas constrictions, and further includes means for attachment of the gas spring.
BACKGROUND OF THE INVENTION
Gas springs are used, inter alia, to dampen the relative movement between two movable parts. One example of such use is found in so-called sun-bed constructions in which the upper part, or canopy, of the bed structure can be moved between a position in which the canopy lies essentially contiguous with the bottom part of said structure, i.e. the bed surface, and an upwardly swung position, in which the canopy is positioned at an angle to the bed surface.
SUMMARY OF THE INVENTION
The present invention relates to a gas-spring arrangement which enables the gas-spring to be secured readily and detachably in selected locations between said terminal positions, therewith obviating the need to provide separate, complicated stop and fixating devices, among other things.
The invention thus relates to a gas-spring arrangement in which the so-called gas-spring includes a substantially tubular outer casing, a rod which is guided for axial movement in the casing between two terminal positions and is dampened with the aid of gas constrictions, and which further includes means for attaching the gas-spring between devices or structures capable of movement therebetween. The gas-spring arrangement is particularly characterized in that it includes a friction device which is operative to brake or retard the relative axial movement of the casing and the rod and also to fixate the casing and rod in selective relative positions, essentially positions located between terminal positions of extension and retraction of the gas-spring.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail with reference to exemplifying embodiments thereof and also with reference to the accompanying drawings, of which
FIG. 1 illustrates schematically a first embodiment of an inventive arrangement, and shows the friction device in axial section;
FIG. 2 is an axial sectional view of a friction device substantially according to FIG. 1;
FIG. 3 is a sectional view taken on the line 3--3 in FIG. 2;
FIG. 4 is an end view of the friction device housing looking in the direction of 4--4 in FIG. 2;
FIG. 5 is and end view of the sleeve of the friction device seen in FIG. 2;
FIG. 6 is a schematic axial sectional view taken on line 6--6 according to of FIG. 8, through a second embodiment of the inventive arrangement;
FIG. 7 shows the arrangement illustrated in FIG. 6 from beneath;
FIG. 8 shows the arrangement illustrated in FIG. 6 from above;
FIG. 9 illustrates schematically an inventive gas-spring arrangement fitted to a sun-bed construction provided with an electric hoist arrangement for movement of the canopy part of the sun-bed, said sun-bed being seen in its longitudinal direction;
FIG. 10 shows the sun-bed of FIG. 9 from the left in said Figure;
FIG. 11 shows the sun-bed of FIG. 9 from the right in said Figure;
FIG. 12 illustrates schematically a sun-bed panel construction as shown in FIG. 11, but without a backpiece;
FIG. 13 is a schematic sectional view taken on 13--13 of FIG. 12; and
FIG. 14 is a schematic sectional view taken on 14--14 of FIG. 12.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
In FIG. 1, the reference 1 identifies a gas-spring which is shown in chain lines and which includes a substantially tubular, outer casing 2, a rod 3 which is guided for axial movement into and out of the hollow casing 2, between two terminal positions and is dampened herewith by means of gas constrictions (not shown), said gas-spring further including attachment parts 4, 5 for attachment of the gas-spring between relatively movable devices or structures, not shown.
FIGS. 1 and 2-5 illustrate an embodiment of a friction device 6 which is effective in braking or
REFERENCES:
patent: 2237318 (1941-04-01), Snyder
patent: 2889895 (1959-06-01), Snow
patent: 4078778 (1978-03-01), Hubweber
patent: 4309027 (1982-01-01), Molders et al.
patent: 4606442 (1986-08-01), Paton et al.
patent: 4881723 (1989-11-01), Bauer et al.
Graham Matthew C.
Ultra Tan International AB
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