Patents Assigned to Keyguard Limited
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Patent number: 7461727Abstract: An energy absorber comprises a helically coiled stores of at least partially yielding material that is drawn over a roller, or two rollers on perpendicular rotational axes, and securely fixed to a base that is attached to fragile structure such as a roof so that when an external force of sufficient size is applied to the roller or rollers through a connecting attachment eye the coil together with roller or rollers moves away from the attachment to the base whilst the coiled material is deployed over the roller or rollers. The absorber may be housed in a casing that is fixed to the base such that the strength of the fixing to the base is sufficient to withstand a predetermined load after which the fixing fails and the housing moves with the coiled store providing protection for both the coiled store and fragile structure.Type: GrantFiled: July 31, 2006Date of Patent: December 9, 2008Assignee: Keyguard LimitedInventor: Julian Renton
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Patent number: 7188704Abstract: An energy absorber comprises a housing (1), a store (15) of plastically deformable material (8) mounted in the housing and having an endstop (27), an attachment (3) for attaching the energy absorber to a structure, another attachment (10) for attaching the plastically deformable material (8) to a structure, and the housing mounting a pair of spaced pins (5, 6) around which the deformable material (8) from a coil is plastically deformed in different directions in a sequential manner to absorb energy. A pair of pins (7, 33) or a guide element (51) and a pin (33) are contacted by the endstop (27) to limit the plastic deformation.Type: GrantFiled: June 17, 2005Date of Patent: March 13, 2007Assignee: Keyguard LimitedInventors: Julian E. Renton, Peter Nott
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Publication number: 20060260892Abstract: An energy absorber comprises a helically coiled stores of at least partially yielding material that is drawn over a roller, or two rollers on perpendicular rotational axes, and securely fixed to a base that is attached to fragile structure such as a roof so that when an external force of sufficient size is applied to the roller or rollers through a connecting attachment eye the coil together with roller or rollers moves away from the attachment to the base whilst the coiled material is deployed over the roller or rollers. The absorber may be housed in a casing that is fixed to the base such that the strength of the fixing to the base is sufficient to withstand a predetermined load after which the fixing fails and the housing moves with the coiled store providing protection for both the coiled store and fragile structure.Type: ApplicationFiled: July 31, 2006Publication date: November 23, 2006Applicant: Keyguard LimitedInventor: Julian Renton
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Patent number: 7104371Abstract: An energy absorber comprises a helically coiled stores of at least partially yielding material that is drawn over a roller, or two rollers on perpendicular rotational axes, and securely fixed to a base that is attached to fragile structure such as a roof so that when an external force of sufficient size is applied to the roller or rollers through a connecting attachment eye the coil together with roller or rollers moves away from the attachment to the base whilst the coiled material is deployed over the roller or rollers. The absorber may be housed in a casing that is fixed to the base such that the strength of the fixing to the base is sufficient to withstand a pre-determined load after which the fixing fails and the housing moves with the coiled store providing protection for both the coiled store and fragile structure.Type: GrantFiled: May 16, 2001Date of Patent: September 12, 2006Assignee: Keyguard LimitedInventor: Julian Renton
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Publication number: 20050252718Abstract: An energy absorber comprises a housing (1), a store (15) of plastically deformable material (8) mounted in the housing and having an endstop (27), an attachment (3) for attaching the energy absorber to a structure, another attachment (10) for attaching the plastically deformable material (8) to a structure, and the housing mounting a pair of spaced pins (5, 6) around which the deformable material (8) from a coil is plastically deformed in different directions in a sequential manner to absorb energy. A pair of pins (7, 33) or a guide element (51) and a pin (33) are contacted by the endstop (27) to limit the plastic deformation.Type: ApplicationFiled: June 17, 2005Publication date: November 17, 2005Applicant: Keyguard LimitedInventors: Julian Renton, Peter Nott
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Patent number: 6918464Abstract: An energy absorber comprises a housing (1), a store (15) of plastically deformable material (8) mounted in the housing and having an endstop (27), an attachment (3) for attaching the energy absorber to a structure, another attachment (10) for attaching the plastically deformable material (8) to a structure, and the housing mounting a pair of spaced pins (5, 6) around which the deformable material (8) from a coil is plastically deformed in different directions in a sequential manner to absorb energy. The endstop (27) limits the plastic deformation.Type: GrantFiled: December 15, 2000Date of Patent: July 19, 2005Assignee: Keyguard LimitedInventors: Julian E. Renton, Peter Nott