Leo R Gurfinkel

US Patent:

20020033126, Mar 21, 2002

Filed:

Jun 1, 2001

Appl. No.:

09/870645

Inventors:

Samuel Tolkoff - Boston MA, US
Leo Gurfinkel - Newton MA, US
Knut Streitlien - Jamaica Plain MA, US

International Classification:

F42B019/00

US Classification:

114/020100

Abstract:

An apparatus for joining cylindrical sections, including a semi-cylindrical profile member adapted to be coupled to a cylindrical section on an outer circumferential portion of the profile member and including an outer circumferential groove and an inner circumferential ridge; a ring-shaped compression member coupled to the profile member and including a circumferential groove on an outer portion thereof and attachment members on opposite sides thereof; and a pair of semi-cylindrical tension members forming a ring shape and each including a pair of inner circumferential ridges and attachment members on end portions thereof. The circumferential ridge of the profile member couples to the circumferential groove of the compression member. One of the circumferential ridges of one of the tension members couples to respective of the circumferential groove of the profile member. The attachment members of the tension members couple to respective of the attachment members of the compression member.

US Patent:

20150144051, May 28, 2015

Filed:

May 30, 2013

Appl. No.:

14/404395

Inventors:

- Quincy MA, US
Leo Gurfinkel - Newton MA, US

International Classification:

B63G 8/14

US Classification:

114330, 294011

Abstract:

Autonomous, unmanned submersible can turn upside down in order to use instrumentation placed on one side only. Batteries () and instrumentation housing () are installed on frame rails () and can change their relative positions, thus inverting the relative positions between center of buoyancy and center of gravity and subsequently inverting the submersible.