IP Library › Granted Patent US 12,637,878
Granted Patent B2
US 12,637,878 · App. 18/775,376 · Granted May 26, 2026

Lockbox with double bend shackle

Inventors: Scott R. Fisher (West Chester, OH); Jeffrey W. Stone (Lebanon, OH); Alex R. Hulteen (Hilliard, OH); William P. Kefauver (Cincinnati, OH)
Assignee: SentriLock, LLC
E05B67/063E05B19/0005
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,637,878
App. No.
18/775,376
Granted
May 26, 2026
Kind
B2
Abstract

An electronic lockbox having a reversible shackle that exhibits two pairs of angled bends so that the lockbox can be mounted on door handles or door knobs, with the angled bends facing toward the rear of the lockbox, or by reversing the shackle, the angled bends can be arranged to be facing toward the front of the lockbox.

Claims (80)

1 . An electronic lockbox, comprising:

a main body that includes an exterior housing;

a shackle that is installed in first and second openings of the exterior housing;

the shackle extending:

from the first opening through a first segment to a first angled bend, through a second segment to a second angled bend, through a third segment, then through a curved portion;

further through a fourth segment to a third angled bend, through a fifth segment to a fourth angled bend, and through a sixth segment that is extends to the second opening of the exterior housing, wherein:

the first segment and the sixth segment define a first plane; and

the second segment and the fifth segment define a second plane that is different from the first plane.

2 . The electronic lockbox of claim 1 , wherein:

the first angled bend and the fourth angled bend substantially comprise the same angle.

3 . The electronic lockbox of claim 2 , wherein:

the second angled bend and the third angled bend substantially comprise the same angle;

the third segment and the fourth segment define a third plane; and

the curved portion lies in the third plane.

4 . A method for installing an electronic lockbox onto an exterior entrance handle, the method comprising:

providing a door with an exterior entrance handle which includes:

a grip portion that at least partially surrounds an open space;

providing an electronic lockbox that comprises:

a main body that includes an exterior housing;

a shackle that is installed in a pair of openings in a first surface of the exterior housing, in which the shackle includes:

a first leg that includes two angled bends,

a U-shaped middle portion, and

a second leg that includes two angled bends;

detaching the shackle from the pair of openings of the exterior housing;

installing the shackle around the grip portion of the exterior entrance handle, so that the U-shaped middle portion is in contact with both the grip portion and the door; and

re-attaching the shackle to the pair of openings of the exterior housing, thereby mounting the electronic lockbox to the grip portion of the exterior entrance handle and allowing the electronic lockbox to hang substantially flush against the door, wherein:

the shackle is reversible and may be installed in at least one of:

a first orientation in which the angled bends aim the shackle towards a rear portion of the electronic lockbox; and

a second orientation in which the angled bends aim the shackle towards a front portion of the electronic lockbox.

5 . The electronic lockbox of claim 3 , wherein:

the first plane and the third plane are parallel to one another.

6 . The electronic lockbox of claim 1 , wherein:

the shackle is detachable from the first and second openings of the exterior housing, and is re-attachable in a reverse orientation to the first and second openings.

7 . An electronic lockbox, comprising:

a main body that includes an exterior housing;

a shackle that is installed in a pair of openings in a first surface of the exterior housing;

the shackle exhibiting:

a first leg that includes two angled bends,

a U-shaped middle portion, and

a second leg that includes two angled bends;

wherein the shackle is reversible and may be installed in at least one of:

a first orientation in which the angled bends aim the shackle towards a rear portion of the electronic lockbox; and

a second orientation in which the angled bends aim the shackle towards a front portion of the electronic lockbox.

8 . The electronic lockbox of claim 7 , wherein:

the exterior housing includes a second portion at a bottom rear portion of the electronic lockbox, in which the second portion includes a planar area;

the U-shaped middle portion is in a first plane; and

if the shackle is in the first orientation, the U-shaped middle portion and the second portion are co-planar.

9 . The electronic lockbox of claim 8 , wherein:

if the shackle is in the second orientation, the U-shaped middle portion is in a second plane that is substantially parallel to the first plane when the shackle was in the first orientation.

10 . The method of claim 4 , wherein:

when the shackle is installed in the first orientation, the electronic lockbox will hang substantially flush against the door; and

when the shackle is installed in the second orientation, the electronic lockbox will hang at a non-flush angle against the door.

11 . The method of claim 4 , wherein, the electronic lockbox includes:

a front portion of the main body that faces away from the door after the electronic lockbox has been mounted to the grip portion of the exterior entrance handle;

a rear portion of the main body that faces toward the door after the electronic lockbox has been mounted to the grip portion of the exterior entrance handle; and

a substantially planar surface proximal to a bottom portion of the rear portion of the main body, which is substantially co-planar with a surface of the shackle that touches the door.

12 . A method for installing an electronic lockbox onto a door knobset, the method comprising:

providing a door with a door knobset, the door knobset including:

a door knob;

a spindle; and

a support cylinder;

providing an electronic lockbox that comprises:

a main body that includes an exterior housing;

a shackle that is installed in a pair of openings in a first surface of the exterior housing, the shackle including:

a first leg that includes two angled bends,

a U-shaped middle portion, and

a second leg that includes two angled bends;

detaching the shackle from the surface of the exterior housing;

installing the shackle around the spindle of the door knobset, so that the U-shaped middle portion is in contact with the spindle; and

re-attaching the shackle to the electronic lockbox, thereby allowing the electronic lockbox to hang substantially flush against the door, wherein:

the two angled bends of the first leg aim the shackle towards a rear portion of the electronic lockbox.

13 . The method of claim 12 , wherein:

the shackle is reversible and may be installed in at least one of:

a first orientation in which the angled bends aim the shackle towards a rear portion of the main body; and

a second orientation in which the angled bends aim the shackle towards a front portion of the main body.

14 . The method of claim 13 , wherein:

when the shackle is installed in the second orientation, the electronic lockbox will hang substantially flush against the door; and

when the shackle is installed in the first orientation, the electronic lockbox will hang at a non-flush angle against the door.

15 . The method of claim 14 , wherein:

if the shackle is installed in the second orientation, a substantially planar surface proximal to a bottom portion of the rear portion of the main body will contact the door at an angle that is substantially parallel to an outer surface of the door.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 17, 2024
From: FISHER, SCOTT R.; STONE, JEFFREY W.; HULTEEN, ALEX R.; KEFAUVER, WILLIAM P.
To: SENTRILOCK, LLC
Reel/Frame 068009/0451 →
Continuity (3)
Provisional Application 63612804 · Dec 20, 2023
Provisional Application 63528599 · Jul 24, 2023
Related Publication 20250034910A1 · Jan 30, 2025
References Cited (82)
US 2A · Goulding · 1836 [cited by examiner]
US 436834A · Mann · 1890 [cited by examiner]
US 621742A · Blickensderfer · 1899 [cited by examiner]
US 957705A · Nerhaft · 1910 [cited by examiner]
US 1227826A · Raff · 1917 [cited by examiner]
US 1308458A · Voight · 1919 [cited by examiner]
US 1332821A · Enos · 1920 [cited by examiner]
US 1420578A · Reichstein · 1922 [cited by examiner]
US 1666453A · Jakopets · 1928 [cited by examiner]
US 3695067A · Bays · 1972 [cited by examiner]
US 4598561A · Girard · 1986 [cited by examiner]
US 4609780A · Clark · 1986 [cited by examiner]
US 4918951A · Kavizky · 1990 [cited by examiner]
US 5253496A · Wang · 1993 [cited by examiner]
US 5280518A · Danler · 1994 [cited by examiner]
US 5475993A · Kuo · 1995 [cited by examiner]
US 5654696A · Barrett · 1997 [cited by examiner]
US 5705991A · Kniffin · 1998 [cited by applicant]
US D392540S · McDaid · 1998 [cited by examiner]
US 5791172A · Deighton · 1998 [cited by examiner]
US 5901588A · Frost · 1999 [cited by examiner]
US D436834S · Aichmann · 2001 [cited by applicant]
US D454486S · Striebel · 2002 [cited by examiner]
US 6427973B1 · Wagner · 2002 [cited by examiner]
US 6624742B1 · Romano · 2003 [cited by applicant]
US 6662607B2 · O'Neal · 2003 [cited by examiner]
US 6683833B2 · Dekker · 2004 [cited by examiner]
US 6761051B1 · Tsai · 2004 [cited by examiner]
US 6822553B1 · Henderson · 2004 [cited by examiner]
US 6842105B1 · Henderson · 2005 [cited by applicant]
US 6937140B1 · Outslay · 2005 [cited by examiner]
US 7177819B2 · Muncaster · 2007 [cited by examiner]
US D540155S · Czerewko · 2007 [cited by examiner]
US 7606558B2 · Despain · 2009 [cited by applicant]
US D603685S · Jackson · 2009 [cited by examiner]
US 7880584B2 · Larson · 2011 [cited by examiner]
US 8040218B2 · Hays · 2011 [cited by examiner]
US 8683833B2 · Marschalek · 2014 [cited by applicant]
US D723353S · Lin · 2015 [cited by examiner]
US 9336637B2 · Neil · 2016 [cited by examiner]
US 10648196B2 · Neau · 2020 [cited by examiner]
US 11274467B1 · Marton · 2022 [cited by examiner]
US 11352817B2 · Gengler · 2022 [cited by examiner]
US 11598120B2 · Fisher · 2023 [cited by examiner]
US 11655653B1 · Zhang · 2023 [cited by examiner]
US 20020107010A1 · Witte · 2002 [cited by examiner]
US 20040219903A1 · Despain · 2004 [cited by examiner]
US 20050207087A1 · Fisher · 2005 [cited by applicant]
US 20060283216A1 · Marcelle · 2006 [cited by applicant]
US 20070156758A1 · Adiga · 2007 [cited by examiner]
US 20080246587A1 · Fisher · 2008 [cited by examiner]
US 20090153291A1 · Larson · 2009 [cited by examiner]
US 20090203562A1 · Varadaraj · 2009 [cited by examiner]
US 20090293562A1 · Fisher · 2009 [cited by applicant]
US 20100245107A1 · Fulker · 2010 [cited by examiner]
US 20110251876A1 · Fisher · 2011 [cited by examiner]
US 20110254659A1 · Bowen · 2011 [cited by examiner]
US 20120068817A1 · Fisher · 2012 [cited by examiner]
US 20120213362A1 · Bliding · 2012 [cited by examiner]
US 20130214903A1 · Kalous · 2013 [cited by examiner]
US 20140236350A1 · Woodard · 2014 [cited by examiner]
US 20140266586A1 · Fisher · 2014 [cited by examiner]
US 20140359292A1 · Kawamura · 2014 [cited by examiner]
US 20160119961A1 · Hrabak · 2016 [cited by applicant]
US 20190234113A1 · Neau · 2019 [cited by examiner]
US 20190383057A1 · Larson · 2019 [cited by examiner]
US 20200002973A1 · Hill · 2020 [cited by examiner]
US 20200071955A1 · Binek · 2020 [cited by examiner]
US 20200071965A1 · Zacchio · 2020 [cited by applicant]
US 20200312067A1 · Fisher · 2020 [cited by examiner]
US 20210027559A1 · Fisher · 2021 [cited by examiner]
US 20210074103A1 · Fisher · 2021 [cited by examiner]
US 20210324662A1 · Ng · 2021 [cited by examiner]
US 20220180681A1 · Ufkes · 2022 [cited by examiner]
US 20220284751A1 · Fisher · 2022 [cited by examiner]
US 20220341222A1 · Matthews · 2022 [cited by applicant]
CN 308105321 · 2021 [cited by applicant]
SG 30201906681 · 2019 [cited by applicant]
WO 1993014571 · 1993 [cited by applicant]
WO 2011065892 · 2011 [cited by applicant]
WO 2016200814 · 2016 [cited by applicant]
ISA Int'l Search Report for PCT/US2024/038317, 19 pages, mailed on Nov. 25, 2024. [cited by applicant]