David Joel Workman

US Patent:

53327012, Jul 26, 1994

Filed:

Dec 14, 1990

Appl. No.:

7/628532

Inventors:

Nathan Bryson - Haguenau, FR
Dietmar Seyferth - Lexington MA
Henry J. Tracy - Portsmouth NH
David P. Workman - Somerville MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

C04B 3556
C04B 3558

US Classification:

501 87

Abstract:

Ceramic compositions can be formed by the pyrolysis of a particulate metal, which forms a component of the ceramic, and another metal, which forms another component of the ceramic.

US Patent:

61418412, Nov 7, 2000

Filed:

Mar 3, 1998

Appl. No.:

9/033875

Inventors:

David E. Workman - Princeton NJ

Assignee:

Tumi, Inc. - South Plainfield NJ

International Classification:

A44B 2100

US Classification:

24701

Abstract:

An add-a-bag assembly for luggage has a base attached to a top wall of the luggage and a buckle that is detachably received on the base. The base has a buckle-receiving portion defined by spaced-apart side walls, each of which has a front overhanging abutment surface that slopes downwardly and rearwardly from a front upper surface. A retainer boss projects laterally from each side wall of the buckle and engages one of the overhanging abutment surfaces of the side wall. Releasable rear locking surfaces on the base and the buckle located rearwardly of the bosses and overhanging abutment surfaces engage each other so as to prevent translatory forward movement of the buckle relative to the base and maintain the bosses on the buckle in engagement under the overhanging abutment surfaces of the base. Tab and slot detents latch the buckle in place. A strap is secured to the rear edge of the body portion of the buckle and is adapted to be joined to an article that is piggybacked on the luggage.

US Patent:

D4171349, Nov 30, 1999

Filed:

Mar 3, 1998

Appl. No.:

D/084469

Inventors:

David E. Workman - Princeton NJ

Assignee:

Tumi, Inc. - Middlesex NJ

International Classification:

1105

US Classification:

D 8350

US Patent:

60474424, Apr 11, 2000

Filed:

Mar 3, 1998

Appl. No.:

9/033876

Inventors:

David E. Workman - Princeton NJ

Assignee:

Tumi, Inc. - South Plainfield NJ

International Classification:

E05B 700

US Classification:

161131

Abstract:

A releasable lock mechanism includes a base having guideways that carry a pair of lock rods for lateral movement along a drive axis in opposite directions with respect to each other between outward, locking positions in which noses on the distal ends of the lock rods are received in holes in each of the two legs of a U-shaped towing handle and inward, release positions, in which the noses are withdrawn from the holes so that the handle can be moved. A push-button driver plate moves along the base perpendicular to the drive axis and pushes the lock rods in and out along drive axis by cam slots on the driver plate that work against cam posts on the lock rods. A compression spring biases the driver plate to an upward position, in which the lock rods are engaged in, or are biased outwardly in readiness to be engaged in, the holes in the towing handle.

US Patent:

62985280, Oct 9, 2001

Filed:

Oct 18, 1999

Appl. No.:

9/420394

Inventors:

David Workman - Princeton NJ

Assignee:

Tumi, Inc. - South Plainfield NJ

International Classification:

A44B 1700
F16L 500

US Classification:

24700

Abstract:

A D-ring of metal wire is specially shaped to accept and retain a special grommet of a hard, wear-resistant polymeric material. The D-ring has a base leg, a pair of side legs joined to opposite ends of the base leg and converging toward each other from junctures with the base leg, and a substantially arcuate head joined to the side legs at junctures forming a neck opening that is constricted relative to a head opening defined within the head. The grommet is received within the head opening and neck opening of the D-ring and has a hole adapted to receive a hook and a peripheral groove that is in captured engagement with the head of the D-ring and with the junctures of the head and the leg portions. Portions of the groove located at the neck opening of the D-ring are deepened relative to adjacent portions of the groove within the head opening so as to retain the grommet while enabling the grommet to be pressed endwise through the neck opening and into the head opening of the D-ring.

US Patent:

D4244036, May 9, 2000

Filed:

Apr 13, 1999

Appl. No.:

D/103330

Inventors:

David E. Workman - Princeton NJ
Timm Fenton - Lebanon NJ

Assignee:

Tumi, Inc. - South Plainfield NJ

International Classification:

0806

US Classification:

D 8320

US Patent:

62204114, Apr 24, 2001

Filed:

Nov 3, 1999

Appl. No.:

9/433405

Inventors:

Paul Scicluna - Penndel PA
David Workman - Princeton NJ

Assignee:

Tumi, Inc. - South Plainfield NJ

International Classification:

A45C 700

US Classification:

190103

Abstract:

An item of expandable luggage includes a substantially rigid main peripheral frame and a substantially rigid secondary peripheral frame. A peripherally continuous gusset of flexible material is connected between the two peripheral frames. Opposite wall panels of the main peripheral frame are joined to corresponding opposite wall panels of the secondary peripheral frame by bridge assemblies, one such assembly being associated with each of the opposite wall panels of the respective frames. Each bridge assembly includes a pair of parallel spaced-apart slide rails affixed to the wall panel of the main peripheral frame, a substantially rigid bridge plate affixed to the wall panel of the secondary peripheral frame and slidably received by the slide rails, and a releasable latch that couples the bridge plate to the wall panel of the main peripheral frame in at least one position in which the secondary peripheral frame is held securely in a position spaced apart from the main peripheral frame.

US Patent:

D4198530, Feb 1, 2000

Filed:

Mar 3, 1998

Appl. No.:

D/084470

Inventors:

David E. Workman - Princeton NJ
Timm John Fenton - Lebanon NJ

Assignee:

Tumi, Inc. - Middlesex NJ

International Classification:

0806

US Classification:

D 8317