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US 5,373,887 AGranted
Security gate
OwnerThomas H. C. Gloverinventor
Life of this patent
Estimating the term…
Abstract
A security gate for protecting an opening in a building such as a door, window or the like comprises an upper guide-way which extends along the length of the opening an elongated vertical rods which extend across the opening with horizontal links pivotally connecting the rods. Roller are connected to every four uppermost link. The rollers engage in the upper guide-way so that the gate can be moved easily.
Claims19
A security gate comprising:
- a plurality of vertical members including pairs of guided members and pairs of intermediate members located between the pairs of guided members,
- first sets of horizontal links, each first set of links connecting together the guided members of the pairs of guided members, and said first sets of links forming a first group of sets of links, one of the links of each first see of horizontal links being the uppermost link of said set,
- second sets of horizontal links, each said second set of links connecting together the intermediate members of the pairs of intermediate members,
- third sets of horizontal links, said third sets of links forming a second group of sets of links, each said third set of links connecting together a guided member with an intermediate member, one of the links of each third set of horizontal links being the uppermost link of said set,
- an elongated upper horizontal guide with horizontal support surface means and
- carrier means engaging the support surface means to be able to move along the guide, said carrier means being mounted respectively on the uppermost links of the sets of links of one of said groups of sets of links,
- the arrangement being such that the gate can be moved from
- (a) an extended protective position in which said sets of links are aligned, to
- (b) a retracted open position in which the first and second sets of links are laterally spaced from and substantially parallel to each other.
6 more elements
A security gate comprising
- a main upper guide incorporating a support surface,
- a plurality of pairs of main vertical rods,
- a plurality of sets of main horizontal links, each said set connecting together a pair of said main rods, the upper link of each set of main links constituting a carrier link,
- a plurality of pairs of intermediate vertical rods,
- a plurality of sets of intermediate links, each said set of intermediate links connecting together a pair of said intermediate rods,
- a plurality of sets of horizontal connecting links, each set of connecting links connecting a main rod with an intermediate rod, and
- a plurality of carriers supported by said support surface to move therealong, said carriers being respectively mounted on said carrier links between their connections to the main rods.
4 more elements
Dependencies are inferred from the claim text.