DOOR SILL

• US 3,667,164 A
• Filed: 06/19/1969
• Issued: 06/06/1972
• Est. Priority Date: 06/19/1969
• Status: Expired due to Term

• Current Assignee: Cray J. Coppins
• Original Assignee: Cray J. Coppins
• Inventors: Coppins, Cray J.
• Primary Examiner(s): Williamowsky, David J.
• Assistant Examiner(s): Kannan, Philip C.
• Application Number:
  US04/834,674
• Time in Patent Office: 1,083 Days
• Field of Search: 49/467,468,469,470,471
• US Class Current: 49/469
• CPC Class Codes: E06B 1/70 Sills; Thresholds
• CPC Class Codes: E06B 2001/707 Thresholds with special provision for insulation

Abstract

Door sill includes a substrate or base member of wood or other insulating material having a metal sill cover secured to the exterior projecting portion of the substrate and terminating adjacent the exterior side of the door when in the closed position, and having a rigid vinyl thermal barrier member connected to the substrate directly beneath the door when in the closed position as by means of downwardly projecting ribs which extend into grooves in the substrate. A sealing strip on the bottom of the door provides sealing contact with the rigid vinyl member when the door is in the closed position.

Claims

1. A door sill comprising a base member of insulating material adapted to be secured to the threshold of a door frame, said base member including a threshold portion for disposition directly beneath the door supported in such frame when such door is in the closed position, and an exterior portion for extension outwardly beyond the door when closed, a sill cover of metal secured to said exterior portion of said base member, said sill cover terminating adjacent the exterior end of said threshold portion, and a rigid thermal barrier member of insulating material secured directly to said threshold portion to prevent a transfer of heat between said metal sill cover and thermal barrier member, said thermal barrier member including a substantially flat body portion having three ribs projecting downwardly therefrom for supporting said thermal barrier member on said base member, said threshold portion having three grooves therein for receipt of said ribs, said ribs having enlargements on the lower ends thereof received in said grooves, two of said grooves having one of their walls which are opposite each other of a reverse slope and their other walls vertical so that the wider part of said two grooves is at the bottom preventing direct upward movement of the associated ribs from said two grooves.

2. The door sill of claim 1 wherein both walls of the third groove are vertical.

3. The door sill of claim 1 wherein said sill cover has an upwardly projecting rear end portion and the forward end of said body portion extends over said upwardly projecting rear end portion for support thereby.

4. The door sill of claim 3 wherein the forward end of said body portion has a down-turned lip forwardly of the upwardly projecting rear end portion of said sill cover.

5. The door sill of claim 1 wherein said thermal barrier is made of a rigid vinyl plastic and said sill cover is aluminum.

6. The door sill of claim 1 wherein said threshold portion is substantially flat and said exterior portion is tapered, said sill cover intermediate its ends having direct mating engagement with said exterior portion, the forward end of said sill cover being turned downwardly for engagement with the forward end of said exterior portion of said base member, and the rear end of said sill cover overlying the forward end of said threshold portion, said rear end of said sill cover projecting downwardly to provide support therefor.

7. The door sill of claim 1 wherein said threshold portion is substantially flat and said exterior portion is tapered, said sill cover intermediate its ends having direct mating engagement with said exterior portion, the forward end of said sill cover being turned downwardly for engagement with the forward end of said exterior portion of said base member, and the rear end of said sill cover projecting upwardly to provide support for the forward end of said thermal barrier member, said base member having a step between said exterior portion and threshold portion providing support for said rear end of said sill cover.