John Henry Mccullough

US Patent:

52228827, Jun 29, 1993

Filed:

Feb 20, 1992

Appl. No.:

7/837966

Inventors:

John E. McCullough - Carlisle MA

Assignee:

Arthur D. Little, Inc. - Cambridge MA

International Classification:

F01C 104
F01C 1908

US Classification:

418 552

Abstract:

A tip seal supporting structure for use in a scroll fluid device includes intermeshing involute scroll elements mounted for relative orbital movement. Each of the scroll elements includes an involute spiral wrap which is secured to a respective wrap support plate at one axial end thereof. Each involute spiral wrap is provided with a tip seal in the other axial end thereof which engages with the wrap support plate of the other scroll element. One of the wrap support plates includes a substantially, centrally located fluid passage into which the innermost end of the involute spiral wrap of the other scroll element extends during a predetermined portion of the relative orbital movement between the scroll elements. In one embodiment of the invention, a tip seal supporting structure in the form of a bridge extends across a predetermined portion of this central fluid passage and functions to axially support the innermost portion of the tip seal that extends into this fluid passage during relative orbital movement of the scroll wraps to thereby prevent destructive vibrational effects, to permit the tip seals to extend into the center of the involute scrolls as much as possible, and to maximize the efficiency of the scroll fluid device. In other embodiments, the tip seal is attached to the involute spiral wrap by a fastener.

US Patent:

45120668, Apr 23, 1985

Filed:

Mar 2, 1981

Appl. No.:

6/239414

Inventors:

John E. McCullough - Carlisle MA

Assignee:

Arthur D. Little, Inc. - Cambridge MA

International Classification:

B23D 1502

US Classification:

29 235

Abstract:

Method for forming scroll members comprising an end plate having an involute wrap rigidly affixed thereto. The end plate and involute wrap are precision formed, e. g. , by casting, either as an integral element or as two separate elements and then the scroll member is broached to the desired dimensional accuracy and finish. Push broaching is accomplished with an involute broaching tool which has a single terminating cutting edge on one or both sides of an involute blade cutter.

US Patent:

52861791, Feb 15, 1994

Filed:

Feb 20, 1992

Appl. No.:

7/837965

Inventors:

Ronald J. Forni - Lexington MA
Robert M. Lucas - Lynnfield MA
John E. McCullough - Carlisle MA
Richard J. Whitehead - Chelmsford MA
Shigeki Hagiwara - Sakai, JP
Hiromichi Ueno - all os Sakai, JP
Katsumi Sakitani - all os Sakai, JP
Yoshitaka Shibamoto - all os Sakai, JP
Hiroyuki Taniwa - all os Sakai, JP

Assignee:

Arthur D. Little, Inc. - Cambridge MA

International Classification:

F01C 104
F01C 2104
F01C 2106

US Classification:

418 551

Abstract:

A thermal isolation arrangement for use in a co-rotating scroll refrigerant compressor includes various thermal insulation elements adapted to minimize heat transfer between hot rotating members of the scroll fluid device and the return refrigerant to be compressed, and between hot lubricant in the compressor and the return refrigerant. The thermal isolation elements of the present invention may be used individually or collectively to minimize the preheating of the inlet refrigerant so as to maintain the density of the return refrigerant being compressed to thereby increase the total efficiency of the scroll fluid device.

US Patent:

52477959, Sep 28, 1993

Filed:

Apr 1, 1992

Appl. No.:

7/861574

Inventors:

John E. McCullough - Carlisle MA

Assignee:

Arthur D. Little, Inc. - Cambridge MA

International Classification:

F02B 3344

US Classification:

606051

Abstract:

An expander driven compressor assembly is disclosed comprising a scroll-type expander having at least one pair of meshed axially extending involute spiral wraps wherein one of the wraps orbits relative to the other wrap and a scroll-type compressor having at least one pair of relatively orbiting meshed axially extending involute spiral wraps. The orbital wrap of the expander is drivingly connected to the orbital wrap of the compressor through a common synchronizer and counterweight assembly. Auxiliary drive power developed by the expander and not required to drive the compressor is used to drive a power take-off shaft. In addition, expansion struts are proved to compensate for thermal expansion or contraction of the relatively orbiting scroll wraps. By this arrangement, a compact and efficient expander driven compressor assembly is achieved.

US Patent:

44034946, Sep 13, 1983

Filed:

Mar 2, 1981

Appl. No.:

6/239564

Inventors:

John E. McCullough - Carlisle MA

Assignee:

Arthur D. Little, Inc. - Cambridge MA

International Classification:

B21D 2200
B21D 3100
B21D 1702

US Classification:

72360

Abstract:

Method and apparatus for forming scroll members comprising an end plate having an involute wrap rigidly affixed thereto. The end plate and involute wrap are precision formed, e. g. , by casting, either as an integral element or as two separate elements and then the scroll member is coined to the desired dimensional accuracy and finish. If a separate end plate and an involute wrap are provided for coining, then they are rigidly joined during coining, an embodiment which permits the use of two different materials and/or the attainment of two different surface characteristics for the involute wrap and the end plate.

US Patent:

52283097, Jul 20, 1993

Filed:

Sep 2, 1992

Appl. No.:

7/939696

Inventors:

John E. McCullough - Carlisle MA

Assignee:

Arthur D. Little, Inc. - Cambridge MA

International Classification:

F25B 2700

US Classification:

623231

Abstract:

An integrated, self-contained portable power and cooling system includes a combustion generator and a scroll-type expander driven by combustion gas discharged from the gas generator, wherein the expander is connected in driving relationship to a scroll air compressor that provides compressed combustion air to the gas generator. Inlet air to the gas generator may be preheated by spent combustion gas discharged from the expander. A drive shaft driven by the expander is connected to a fuel pump, an electrical generator, and a refrigerant compressor. The scroll refrigerant compressor supplies refrigerant to a condenser evaporator cooling circuit for cooling a zone directly or indirectly via an auxiliary cooling loop in heat exchange relationship with the evaporator. The system has application in a man-portable system capable of cooling an individual in a high temperature environment and supplying electrical power.

US Patent:

42590434, Mar 31, 1981

Filed:

Apr 23, 1979

Appl. No.:

6/032178

Inventors:

William P. Hidden - Wenham MA
John E. McCullough - Carlisle MA

Assignee:

Arthur D. Little, Inc. - Cambridge MA

International Classification:

F01C 2102

US Classification:

418 55

Abstract:

A thrust bearing/coupling component for use in scroll-type apparatus which may be a compressor, expander, fluid pump or vacuum pump. The resulting apparatus is particularly suited for use as auxiliary equipment in automotive power systems. The component of this invention comprises rotating or oscillating load carrying members, preferably ball bearings, confined within facing indentations cut in the orbiting scroll member end plate surface and an associated surface in a member stationary with respect to the orbiting scroll member. The thrust bearing/coupling component couples the stationary and orbiting scroll members in a predetermined angular relationship and it may be used to carry either expansive or compressive axial loads on the scroll members to achieve efficient radial sealing of the moving scroll fluid pockets while controlling surface wearing so that the scroll apparatus may be operated for an extended period of time without servicing.

US Patent:

RE344133, Oct 19, 1993

Filed:

May 22, 1992

Appl. No.:

7/886807

Inventors:

John E. McCullough - Carlisle MA

Assignee:

Arthur D. Little, Inc. - Cambridge MA

International Classification:

F01C 104
F16D 304

US Classification:

418 553

Abstract:

A scroll fluid device is provided with a synchronizer arrangement that prevents relative rotation between the involute scroll wraps defining fluid working chambers while permitting the wraps to orbit relative to each other to perform work on fluid moved through the device or to expend work through the reaction of fluid moving through the device. The synchronizer comprises axially extending teeth affixed to one of the scroll support end plates interdigited with grooves affixed to the other end plate. The grooves of the synchronizer each have a width that accommodates the orbital excursion of each tooth extending into the groove such that, during orbital movement of one scroll wrap relative to the other, the teeth engage the side walls of the groove to prevent rotation of the scroll wraps relative to each other in either direction. The synchronizer also permits movement of one scroll wrap relative to the other along a line generally extending between the involute centers of the wraps in a direction that reduces the orbit radius.