Patent
   D801168
Priority
Jun 01 2016
Filed
Jun 01 2016
Issued
Oct 31 2017
Expiry
Oct 31 2032
Assg.orig
Entity
unknown
5
18
n/a
The ornamental design for a torsion spring to aid in keeping an interior door open, as shown and described.

FIG. 1 is a perspective of a torsion spring to aid in keeping an interior door open showing the design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is another side elevational view thereof;

FIG. 4 is a bottom elevational view thereof; and

FIG. 5 is a top elevational view thereof;

FIG. 6 is an end elevational view thereof; and,

FIG. 7 is another end elevational view thereof.

Vavrinak, Robert, Vavrinak, Jacque

Patent Priority Assignee Title
11047162, Mar 03 2020 Torsion spring door closing apparatus
11203888, Nov 22 2013 Gecom Corporation Vehicle hood latches
D895416, Jan 12 2018 SENJU SPRINKLER CO., LTD. Spring for sprinkler head
D926026, May 23 2019 Door stop
ER1115,
Patent Priority Assignee Title
1715590,
2037411,
3339225,
3825973,
4823473, Sep 19 1986 Illinois Tool Works Inc Extensometer for material testing machine
4894019, Jun 16 1988 Delta Systems, Inc. Torsion spring shorting connector
5031270, Mar 15 1990 Friction hinge
5649339, Jul 29 1996 Door closing device
5826306, Oct 28 1997 FCA US LLC Sliding door center adjustable hinge
6205618, Jul 09 1999 HANGER SOLUTIONS, LLC Hinge
6553623, Mar 27 2001 Automatic pivot door opener
7011329, Mar 08 2004 Yoder Brake & Manufacturing Company Tow bar with torsion spring lift assist and method
7520022, Apr 07 2005 Bobrick Washroom Equipment, Inc. Spring and hinge assembly for installing a door on toilet partitions
8671521, May 06 2010 Robert F., Irwin Control motion hinge with torsion spring
8756762, Jan 18 2011 Samsung Electronics Co., Ltd. Tilt angle switchable hinge assembly for portable electronic devices
9163438, May 24 2013 Maxtech Consumer Products Limited Door stay
9297193, Aug 15 2015 Door opener aid
D533447, Feb 06 2004 SUGATSUNE KOGYO CO , LTD Door stay
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