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US 4,287,638 AGranted
Inside/outside link
OwnerFrancis J. McCabeinventor
Life of this patent
Estimating the term…
Abstract
A releasable link is mounted on the wall of a duct, plenum, chamber or the like. The link releases in response to a predetermined increase of temperature within the duct. The link is resettable without having to gain access to the interior of the duct. In addition, the link can be released manually or remotely from the outside. In another embodiment, in addition to being resettable as well as manually and/or remotely releasable from the outside, the link is releasable in response to a predetermined temperature increase occurring either within or outside of the duct.
Claims28
A releasing device comprising:
- (a) a releasable member;
- (b) a substantially dome-shaped, mounting member, said dome-shaped member having a flattened portion at an apex thereof, a concave inner portion and a convex outer portion, said mounting member being adapted for mounting over an aperture in a fluid barrier, and further having an aperture therein for receiving said releasable member, said releasable member being adapted for insertion through said aperture in said mounting member from said outside portion to said inside portion;
- and
- (c) gripping means, mounted on said mounting member for engaging said releasable member when in a normal position after said releasable member has been inserted through said aperture in said mounting member said gripping means further being adapted to release said releasable member when in an activated position, said gripping means further comprising heat responsive means, said heat responsive means being mounted on the inside portion of the flattened portion of said dome-shaped member and further being adapted to cause said gripping means to move to said normal position in response to a preselected ambient temperature and to cause said gripping means to move to said activated position in response to a preselected increase in said ambient temperature.
1 more element
A releasing device comprising:
- (a) a first releasable member;
- (b) a mounting member adapted for mounting over an aperture in a fluid barrier, said mounting member having an aperture therein for receiving said first releasable member therethrough;
- (c) a first gripping means, mounted on said mounting member, for engaging said first releasable member in a normal position and for releasing said first releasable member in an activated position, said first gripping means comprising first heat responsive means for causing said first gripping means to move to the normal position in response to a preselected first ambient temperature on one side of said fluid barriers and for causing said first gripping means to move to the activated position in response to a preselected increase in said ambient first temperature;
- (d) a second releasable member;
- (e) a second gripping means, connected to said first releasable member, for engaging said second releasable member in a normal position and for releasing said second releasable member in an activated position, said second gripping means comprising second heat responsive means for causing said second gripping means to move to the normal position in response to a preselected second ambient temperature on another side of said fluid barrier opposite said one side and for causing said second gripping means to move to the activated position in response to a preselected increase in said second ambient temperature.
2 more elements
Dependencies are inferred from the claim text.