HERMAN ERNST FRENTZEL
Pilots at Corte Morada, San Rafael, CA

4592378, Jun 3, 1986

Mar 6, 1985

6/708756

Herman E. Frentzel - Kentfield CA

B08B 302, B08B 908

134111

An improved water jet pool cleaner system includes a pool cleaner with a buoyant housing powered about the pool by forward and reverse driving nozzles so dirt and other debris is gathered at the low point on the bottom of the pool by the action of depending cleaner hoses. Water from the filter pump enters a fluid reservoir from which it flows along parallel flow paths to the forward and reverse driving nozzles, to a turbine, and to the cleaner hoses. Pressurized water is directed to the forward and reverse nozzles through a rotary valve which is rotated by the drive train connected to the turbine. The parallel flow paths permits water to be provided to the driving nozzles, to the turbine and to the cleaner hoses at pressures substantially equal to the fluid reservoir pressure. The system uses a flow diverter downstream of the main pool filter to divert the proper amount of water to the cleaner. Manual and automatic flow diverters and a novel in-line filter are also disclosed.

4569361, Feb 11, 1986

Dec 28, 1984

6/687084

Herman E. Frentzel - Kentfield CA

Arneson Products, Inc. - Corte Madera CA

B08B 302, B08B 908, E04H 320

134167R

An improved water jet pool cleaner system includes a pool cleaner with a buoyant housing powered about the pool by forward and reverse driving nozzles so dirt and other debris is gathered at the low point on the bottom of the pool by the action of depending cleaner hoses. Water from the filter pump enters a fluid reservoir from which it flows along parallel flow paths to the forward and reverse driving nozzles, to a turbine, and to the cleaner hoses. Pressurized water is directed to the forward and reverse nozzles through a rotary valve which is rotated by the drive train connected to the turbine. The parallel flow paths permits water to be provided to the driving nozzles, to the turbine and to the cleaner hoses at pressures substantially equal to the fluid reservoir pressure. The system uses a flow diverter downstream of the main pool filter to divert the proper amount of water to the cleaner. Manual and automatic flow diverters and a novel in-line filter are also disclosed.

4729406, Mar 8, 1988

Nov 24, 1986

6/933974

Herman E. Frentzel - Kentfield CA

Arneson Products, Inc. - Corte Madera CA

G05D 1100

13762414

An automatic valve is disclosed for controlling the direction of fluid flow. The valve is particularly suited for use with automatic pool cleaning systems to alternately direct fluid flow to the filtration system of an automatic pool cleaner. The valve includes a primary conduit and a branch segment to define an alternate path for fluid flow. A reciprocating piston is mounted within the branch segment. Indexing is provided by a first cammed surface, formed at one end of the piston which includes a plurality of slots. The slots are selectively engaged with a stop pin. The condition of the valve is determined by the length of the particular slot engaged with the stop pin. A spring is provided for biasing the piston out of engagement with the stop pin when the fluid flow is interrupted. In one embodiment of the subject valve, the volume and pressure of the fluid flow are automatically controlled.

4343603, Aug 10, 1982

Jul 16, 1980

6/170312

Roger Pavlow - San Rafael CA
Herman E. Frentzel - Kentfield CA

A21C 304, A23L 110, A23L 131

425114

A machine for extruding dough, typically of the bagel variety, about a food, such as a frankfurter, is disclosed. Typically, the frankfurters are loaded into a magazine. The magazine feeds a star wheel at the bottom. The star wheel singulates, rotates and discharges the frankfurters into a chute. Once the frankfurters are deposited in the chute, an endless chain with propelling pawls propels each sequential frankfurter through the chute concentrically to an extruder. The extruder continuously dispenses bagel dough concentrically around the frankfurters and is supplied with bagel dough under pressure by an auger flight extruder or other propelling mechanism. Extrusion occurs from an extrusion head having a frankfurter passageway centrally thereof. Dough is extruded into first and second extrusion chambers and out first and second immediately concentric extrusion annuluses about the frankfurter passageway. The dough encased frankfurter passes from the chamber onto a conveyor belt and under a sensing roller and a downstream knife.

4643217, Feb 17, 1987

May 24, 1985

6/737521

Herman E. Frentzel - Kentfield CA

Arneson Products, Inc. - Corte Madera CA

G05D 1100

137112

An automatic valve is disclosed for controlling the direction of fluid flow. The valve is particularly suited for use with automatic pool cleaning systems to alternately direct fluid flow to the filtration system of an automatic pool cleaner. The valve includes a primary conduit and a branch segment to define an alternate path for fluid flow. A reciprocating piston is mounted within the branch segment. Indexing is provided by a first cammed surface, formed at one end of the piston which includes a plurality of slots. The slots are selectively engaged with a stop pin. The condition of the valve is determined by the length of the particular slot engaged with the stop pin. A spring is provided for biasing the piston out of engagement with the stop pin when the fluid flow is interrupted. In one embodiment of the subject valve, the volume and pressure of the fluid flow are automatically controlled.

4654141, Mar 31, 1987

Feb 21, 1986

6/831535

Herman E. Frentzel - Kentfield CA

Arneson Products, Inc. - Corte Madera CA

B01D 2708, B01D 3516

210232

An improved water jet pool cleaner system includes a pool cleaner with a buoyant housing powered about the pool by forward and reverse driving nozzles so dirt and other debris is gathered at the low point on the bottom of the pool by the action of depending cleaner hoses. Water from the filter pump enters a fluid reservoir from which it flows along parallel flow paths to the forward and reverse driving nozzles, to a turbine, and to the cleaner hoses. Pressurized water is directed to the forward and reverse nozzles through a rotary valve which is rotated by the drive train connected to the turbine. The parallel flow paths permits water to be provided to the driving nozzles, to the turbine and to the cleaner hoses at pressures substantially equal to the fluid reservoir pressure. The system uses a flow diverter downstream of the main pool filter to divert the proper amount of water to the cleaner. Manual and automatic flow diverters and a novel in-line filter are also disclosed.

4221515, Sep 9, 1980

Mar 17, 1978

5/887571

James A. Brown - Moraga CA
Herman E. Frentzel - Kentfield CA

Matson Navigation Company - San Francisco CA

B65G 114

410 32

A deck container restraint system is disclosed which unitizes discrete containers against vertical movement in modules of three-wide, typically four-high stacks or columns to prevent overboard loss due to static and dynamic load conditions experienced at sea. A three-wide, one-high bottom tier of containers is secured against side to side and vertical movement by deck cones having locking devices. The overlying three-wide second tier is secured against side to side and vertical movement by cones having locking devices at the top of the first tier. Finally the three-wide, two-high top third and fourth tiers of containers are loaded, first by being tied vertically together by cones having locking devices and second, by being lifted in vertically tied pairs onto stacking fittings at the second-third tier interface. The stacking fittings restrain side to side movement at the second-third tier interface only. Upon completion of placement of the third and fourth tier, an equalizing spreader fits over the top of the three-wide, four-high container columns or stacks, restraining relative vertical and horizontal movement between the corners of adjacent containers.

D345056, Nov 7, 1989

Oct 2, 1986

6/914749

Robert W. Maier - Kentfield CA
Charles J. Patterson - Orinda CA
Deiter Rief - Rohnert Park CA
John Gard - Mountain View CA
Herman E. Frentzel - Kentfield CA

Aquanaut, Inc. - Corte Madera CA

D32 1

4817991, Apr 4, 1989

Jun 19, 1987

7/064241

Herman E. Frentzel - Kentfield CA
Deiter Rief - Rohnert Park CA

Arneson Products, Inc. - Corte Madera CA

F16L 500

285 7

A fitting is disclosed for covering the vacuum orifice formed in the wall of the swimming pool. The fitting includes a hollow body member connectable to the vacuum orifice and having an opening for receiving a vacuum hose. A spring loaded cap is connected to the body member and is designed to seal the orifice when the cap is in the closed position. A safety locking mechanism is provided to prevent the inadvertent opening of the fitting. In the preferred embodiment, the cap further includes a lug for engaging a vacuum hose to enhance the connection between the hose and the fitting.

3951054, Apr 20, 1976

Sep 24, 1974

5/508798

Herman E. Frentzel - Kentfield CA

Collins Foods International, Inc. - Los Angeles CA

A22C 1700, A22C 1702, A22C 1712

99538

A spiral meat slicer especially for cutting ham, wherein the ham is mounted vertically on a spiked platform which slowly revolves. A rotating disk blade is brought into engagement with the periphery of the ham to cut the ham to the bone. The blade support is mounted on a lead screw so that the blade steadily rises as the ham rotates. Thus an unbroken spiral cut of ham is produced. In order to permit selective manual control when cutting around the aitch bone, a manually manipulatable arm is provided, by which the blade may be selectively moved toward and away from the rotative axis of the ham. Once the aitch bone has been cleared, the arm is detented into an extreme position and thereafter the blade is automatically biased toward the ham with a predetermined spring force, by means of a biasing spring. When the arm causes the blade to swing completely free of the ham to its extreme retracted position, a fractional nut disengages from the lead screw and allows the blade support to drop by gravity to its starting position at the base.