Craig D Quarberg

US Patent:

7137655, Nov 21, 2006

Filed:

Apr 13, 2004

Appl. No.:

10/823137

Inventors:

Craig D. Quarberg - Monticello MN, US

International Classification:

E05C 17/54
E05F 5/02
A47F 5/00

US Classification:

292339, 292338, 292DIG 15, 16 82, 248351, 248354

Abstract:

A security brace for impeding forced entry into a room through an entry door. The brace comprises a plurality of elongated pole members with foot members secured at a first end of the pole member, and a block member operatively coupled to a second end of the pole members. The block member has a top planar surface with a yoke projecting upward from the top planar surface. The yoke is adapted to receive the shaft of a door knob lock set. When an uninvited intruder applies force to open the entry door, the force vector is directed down the pole members and holds the foot members against the floor, thus impeding the door from swinging open.

US Patent:

7621356, Nov 24, 2009

Filed:

Nov 17, 2006

Appl. No.:

11/601201

Inventors:

Craig D. Quarberg - Monticello MN, US

International Classification:

B60S 13/00

US Classification:

180 12, 180 11, 180 13, 180 191, 180 192, 180 193, 280259, 280260, 280261, 280475

Abstract:

A powered, directionally steerable trailer jack that can be used to elevate and lower a trailer tongue and having a caster wheel assembly affixed to a lower end of the jack. The caster wheel assembly includes a shroud having the wheels' axle journaled for rotation at a lower end thereof along with a pair of shafts also journaled for rotation in the shroud and oriented parallel to the axle. A chain and sprocket arrangement provides a low-speed, high torque transmission between one of the shafts and the axle and a high-speed, low torque transmission between the other of the shafts and the axle. The trailer jack assembly can be tilted out of its vertical disposition to provide adequate clearance when the trailer is being pulled over uneven road surfaces. The power for driving the wheels may be provided manually by means of a crank for turning one or the other of the shafts or by an electric motor coupled one of the shafts.

US Patent:

20040245787, Dec 9, 2004

Filed:

Dec 15, 2003

Appl. No.:

10/736362

Inventors:

Craig Quarberg - Monticello MN, US

International Classification:

E05C003/14

US Classification:

292/228000

Abstract:

A lock device for securing a building entry door that can be readily carried in a purse or pocket comprises a three-part assembly of a rigid, generally rectangular strap member of a predetermined length and width dimension and that has a cylindrical stud affixed to and projecting normally from a first major surface of the strap member proximate one end thereof, the strap member also including a pattern of apertures each at a differing distance from the first end of the strap. The second piece comprises a flat rigid plate that is sized to span a gap between a surface of the entry door and a surface of the adjacent door jam with the door closed and formed through the thickness dimension of the plate is a slot through which the strap member can slide. With the stud on the strap member inserted into a recess in the door jam, the door is closed and the plate is slid along the strap until it abuts the door and jam whereupon a pin is inserted through one of the holes in the strap to maintain the plate in engagement with the door and jam.

US Patent:

55494072, Aug 27, 1996

Filed:

Apr 10, 1995

Appl. No.:

8/419262

Inventors:

Avraham Y. Levi - St. Paul MN
Craig D. Quarberg - Big Lake MN

Assignee:

Structron Corporation - San Marcos CA

International Classification:

F16B 714

US Classification:

403109

Abstract:

A lock for selectively allowing and preventing relative longitudinal displacement of an outer and inner telescoping tube segments. It comprises a tubular cam adapted to plug into and rotate with one end of the inner tube segment. It has associated with it a pair of arcuate cam followers, each with an outer and an inner cylindrical surface where the outer cylindrical surface can be forced by the action of the tubular cam to frictionally engage the inner surface of the outer telescoping tube segment upon rotation of the inner telescoping tube segment.