Jeffrey Brian Christensen

US Patent:

51996278, Apr 6, 1993

Filed:

Mar 29, 1991

Appl. No.:

7/678534

Inventors:

Jeffrey M. Christensen - Tujunga CA

International Classification:

B27F 709

US Classification:

227130

Abstract:

A hammer including a magazine for holding and feeding fasteners such as nails including hydraulic means for driving the fasteners. The hammer head is movable to the rearward with respect to the body and the handle upon impacting a work surface driving one or more pistons rearwardly. Cylinders for the pistons surround a single fastener driver cylinder and piston of smaller surface area than rearward traveling piston or pistons. Hydraulic fluid flows from the large or multiple piston(s) through a manifold to the rear of the fastener drive cylinder piston. Rapid forward movement of the fastener drive piston sets the fastener. Forward movement of the movable head by a return spring opens a chamber for the next fastener to be placed by spring action in front of the fastener drive blade, ready for the next fastener placement. The body of the hammer is secured to the handle at an angle A which is between 95. degree. and 116. degree. and the center of gravity of the hammer is located between at handle location. +-.

US Patent:

20230034355, Feb 2, 2023

Filed:

Oct 7, 2022

Appl. No.:

17/938870

Inventors:

- Englewood CO, US
Jeffrey CHRISTENSEN - Everett WA, US
Aaron KANNARD - Los Angeles CA, US
Daniel J. LEE - Denver CO, US
Joseph DOGUÉ - Aurora CO, US

Assignee:

Paragon 28, Inc. - Englewood CO

International Classification:

A61B 17/15
A61B 90/00
A61B 17/17
A61B 17/02
A61B 17/16
A61F 2/46

Abstract:

A distractor system for use in a joint between two bone surfaces of an anatomical structure includes, for example, distractor and at least one detachable tool comprising a body having a proximal portion and a distal portion, said proximal portion being releasably attachable to at least one of a first end of the distractor and/or a second end of the distractor. The distal portion of the detachable tool being operably positionable in the joint between the two bone surfaces of the anatomical structure. The detachable tools may include a detachable paddle.

US Patent:

20210361293, Nov 25, 2021

Filed:

Jun 11, 2021

Appl. No.:

17/345402

Inventors:

- Englewood CO, US
Jeffrey CHRISTENSEN - Everett WA, US
Aaron KANNARD - Los Angeles CA, US
Daniel J. LEE - Denver CO, US
Joseph DOGUÉ - Aurora CO, US

Assignee:

Paragon 28, Inc. - Englewood CO

International Classification:

A61B 17/15
A61B 17/16
A61B 17/17
A61B 17/02
A61B 90/00
A61F 2/46

Abstract:

A distractor system for use in a joint between two bone surfaces of an anatomical structure includes, for example, distractor and at least one detachable tool comprising a body having a proximal portion and a distal portion, said proximal portion being releasably attachable to at least one of a first end of the distractor and/or a second end of the distractor. The distal portion of the detachable tool being operably positionable in the joint between the two bone surfaces of the anatomical structure. The detachable tools may include a detachable paddle.

US Patent:

20210298911, Sep 30, 2021

Filed:

Jun 14, 2021

Appl. No.:

17/304064

Inventors:

- Englewood CO, US
Jeffrey CHRISTENSEN - Everett WA, US
Daniel J. LEE - Denver CO, US
Joseph DOGUÉ - Aurora CO, US
Francis D. BARMES - Parker CO, US
Albert DACOSTA - Lone Tree CO, US
Aaron KANNARD - Los Angeles CA, US

Assignee:

Paragon 28, Inc. - Englewood CO

International Classification:

A61F 2/42
A61F 2/46
A61B 17/16
A61B 17/02

Abstract:

Methods for total ankle replacement procedures are disclosed. A method includes making an initial incision, obtaining an alignment guide, performing an alignment, performing a tibia and talar resection, trialing the implant components, performing a talar chamfer resection, and implanting the components.