A display case includes a housing partially surrounding a display space, a door pivotably coupled to the housing and cooperating with the housing to further enclose the display space, and a hinge assembly for pivotably coupling the door to the housing. The hinge assembly includes a biasing member ap
A display case includes a housing partially surrounding a display space, a door pivotably coupled to the housing and cooperating with the housing to further enclose the display space, and a hinge assembly for pivotably coupling the door to the housing. The hinge assembly includes a biasing member applying a biasing force on the door and a gear drive for adjusting a pre-tension force on the biasing member.
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1. A hinge assembly attached to a door of a display case, the hinge assembly comprising: a pin for supporting the door, the pin defining a pivot axis;a shell including a bore receiving at least a portion of the pin, the shell being movable relative to the pin;a spring coupled between the pin and the
1. A hinge assembly attached to a door of a display case, the hinge assembly comprising: a pin for supporting the door, the pin defining a pivot axis;a shell including a bore receiving at least a portion of the pin, the shell being movable relative to the pin;a spring coupled between the pin and the shell, the spring member exerting a biasing force on the pin about the pivot axis;a first gear secured to the shell; anda second gear engaging the first gear, rotation of the second gear causing the shell to pivot relative to the pin, thereby changing the biasing force exerted by the spring member, wherein the shell, the spring, the first gear, and the second gear are disposed completely outside of the door and a portion of the pin is received by the door to facilitate movement of the door with respect to the shell. 2. The hinge assembly of claim 1, wherein the spring member is a torsional coil spring positioned within the bore around the pin, the spring including a first end secured to the shell and a second end secured to the pin. 3. The hinge assembly of claim 1, wherein the second gear is a worm gear mounted on a gear shaft defining a gear shaft axis, rotation of the gear shaft driving the first gear to rotate. 4. The hinge assembly of claim 3, wherein the gear shaft includes a slot for receiving a tool to rotate the gear shaft about the gear shaft axis. 5. The hinge assembly of claim 1, wherein the shell supports the pin for rotation relative to the shell. 6. A hinge assembly attached to a door of a display case, the door having a main housing and a closed position, the hinge assembly comprising: a support member;a shell including a first gear, the shell coupled to the support member;a second gear supported for rotation by the support member and in meshing relationship with the first gear, rotation of the second gear producing a corresponding rotation of the first gear and the shell;a pin defining a pin axis, the pin supported for rotation about the pin axis by the shell; anda biasing member connected to the pin and the shell and operable to provide a biasing force to the pin, the biasing force being adjusted in response to rotation of the shell, wherein the biasing force is configured to bias the door toward the closed position, wherein the support member, the shell, the second gear, and the biasing member are disposed completely outside of the door and a portion of the support member is received by the door to facilitate movement of the door with respect to the shell. 7. The hinge assembly of claim 6, wherein the shell and the first gear are rotatable about the pin axis, and wherein the biasing member exerts a biasing force about the pin axis. 8. The hinge assembly of claim 7, wherein the second gear is rotatable about a gear axis that is perpendicular to the pin axis. 9. The hinge assembly of claim 6, wherein the shell includes a bore receiving at least a portion of the pin, and wherein the biasing member is a torsional coil spring positioned within the bore between the shell and the pin. 10. The hinge assembly of claim 6, wherein the support member includes an elongated sleeve having a bore, and wherein the shell is positioned within the bore of the sleeve. 11. The hinge assembly of claim 6, wherein the second gear is a worm gear mounted on a gear shaft, rotation of the gear shaft driving the first gear to rotate. 12. The hinge assembly of claim 11, wherein the gear shaft includes a slot for receiving a tool to rotate the gear shaft about a gear shaft axis. 13. A hinge assembly attached to a door of a display case, the hinge assembly comprising: a pin for supporting the door, the pin defining a pin axis;a shell having a bottom end and a top end, the bottom end including a bore receiving at least a first portion of the pin, the shell being rotatable about the pin axis relative to the pin;a biasing member coupled to the pin and the shell, the biasing member exerting a biasing force on the pin about the pin axis;a first gear coupled to the top end; anda gear shaft having a second gear engaging the first gear, rotation of the second gear causing the rotation of the first gear and causing the shell to pivot relative to the pin axis to change the biasing force exerted by the biasing member, wherein the shell, the biasing member, the first gear, and the second gear are disposed completely outside of the door and a portion of the pin is received by the door to facilitate movement of the door with respect to the shell. 14. The hinge assembly of claim 13, wherein the gear shaft defines a gear shaft axis and includes a slot for receiving a tool to rotate the gear shaft about the gear shaft axis. 15. The hinge assembly of claim 14, wherein the gear shaft axis is perpendicular to the pin axis. 16. The hinge assembly of claim 14, wherein the slot is on a first end of the gear shaft, and wherein the second gear is a worm gear, the worm gear being arranged along the gear shaft axis between the slot and a second end of the gear shaft opposite the first end. 17. The hinge assembly of claim 13, wherein rotation of the gear shaft in a first direction causes the first gear and the shell to pivot in a first direction relative to the pin axis, thereby increasing the biasing force of the biasing member on the pin. 18. The hinge assembly of claim 17, wherein rotation of the gear shaft in a second direction opposite the first direction causes the first gear and the shell to pivot in a second direction relative to the pin axis, thereby decreasing the biasing force of the biasing member on the pin.
Rapp Sandu Z. (1865 79th St. Causeway ; #15-I The Kennedy House North Bay Village FL 33141), Toilet seat spring hinge having an adjustable spring force.
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