WILLIAM T VAN WAGNER
Real Estate Commission in Gardenville, PA

6147759, Nov 14, 2000

Feb 3, 1999

9/243138

George R. Simmons - Haddon Heights NJ
Edmond J. Dougherty - Strafford PA
Anders G. Andersson - San Jose CA
Gregory M. Bone - West Chester PA
Albert Augustine - Belmont Hills PA
Charles T. Griswold - Westampton NJ
Gary D. Giegerich - North Woods PA
Paul T. Giegerich - Laverock PA
William G. Van Ocker - Doylestown PA

Laserscore, Inc. - Fort Washington PA

G01B 1103

356375

An apparatus detects the presence and location of at least one object in a field. The apparatus comprises a rotating arm which spins around the field, a position sensor for detecting the angular displacement of the rotating arm relative to a fixed point, and a processor. The rotating arm includes a transmitter and an opposing receiver array mounted thereon and fixed relative to each other. The receiver array includes a plurality of receivers located horizontally coplanar with each other. The receivers are concentrated towards one side of the receiver array which is aligned with a center region of the dartboard. The transmitter outputs a detection beam that emanates from a single point, such as a divergent beam. The detection beam overlaps the field and is simultaneously received at all times by the plurality of receivers of the receiver array. The receivers detect changes which occur in the field as a result of an object being in the field, manifested by shadows on the field.

3986310, Oct 19, 1976

Dec 18, 1974

5/534125

William A. van den Broek - Doylestown PA

KDI Sylvan Pools, Inc. - Doylestown PA

E04H 316, E04H 318

52169R

A modular swimming pool structure, for pools of the type having a water impermeable liner received in a cavity, utilizes a minimum of repeated components which permit the structure to be installed in-ground or above-ground in a wide variety of shapes and configurations. The cavity walls are defined by a plurality of positively interlocked metal boards which are articulatable with respect to each other and can thus be used for linear or arcuate pool configurations. The tops of the boards are received in a coping beam and the bottoms in a ground beam, variants of each being disclosed. The same boards may be used for a perimetrical decking, of particular benefit in the case of above-ground pools. An erection method for an in-ground pool is also disclosed which minimizes the excavation required. Above-ground versions with decks provide integral buttressing and all versions avoid conventional bracing structures.

4574048, Mar 4, 1986

Feb 27, 1984

6/583872

William A. van den Broek - Doylestown PA

KDI Sylvan Pools, Inc. - Doylestown PA

B10D 3500, E04H 316

210136

A vacuum filter system for swimming pools, which includes a filter tank carrying a plurality of replaceable filter cartridges, the filter tank being in the suction line from the pool, which tank has an outlet connected to a pump which has a return line to the pool, with air being purged from the filter tank by the vacuum created in the filter tank when in operation.

3933129, Jan 20, 1976

Mar 6, 1975

5/556033

William A. van den Broek - Doylestown PA

KDI-Sylvan Pools, Inc. - Doylestown PA

F22B 700, F22B 3306

122156

A combined liquid filtering and heating apparatus comprises a cylindrical filter section coaxially mounted on top of a water-jacketed combustion chamber section. Cold unfiltered water is fed through the filter section and a portion of the feed is directed through and is heated in the jacket. The feed water passing through the filter is heated to a lesser extent than the water passing through the jacket by heat transfer from the combustion chamber and a plurality of flues extending from the combustion chamber through the filter section. The filter medium may be sand, cartridges, bags or the like.

3959830, Jun 1, 1976

Apr 28, 1975

5/572578

William A. van den Broek - Doylestown PA

KDI Sylvan Pools, Inc. - Doylestown PA

E04H 316, E04H 318, F16L 2102

417219

An in-ground swimming pool of completely plastic construction is comprised of a wall portion having the upper edge thereof substantially at ground level and a flexible plastic liner which is secured to the top of the wall portion and completely covers the interior sides of said wall portion and the bottom portion of the pool. The wall portion is comprised of a plurality of extruded plastic panels interconnected with each other by means of integral tongue and groove members on the panels which are rigidly secured together by solvent bonding of each respective tongue and groove connection. An extruded plastic coping member is provided with an upwardly extending channel in the bottom surface thereof adapted to be force-fitted over the top of the wall portion to secure the vinyl liner therebetween. At least some of said wall panels are provided with externally opening slots adapted to receive extruded plastic support wall panels perpendicular thereto which are provided with tongue means along at least one edge thereof to help stabilize the wall portion. Each wall panel may be formed by two spaced apart walls interconnected by transverse connecting walls or may be comprised of a single wall having tongue and/or groove defining members integrally formed therewith adjacent opposite edges thereof and at at least one location intermediate the ends thereof.

4080670, Mar 28, 1978

Oct 12, 1976

5/731734

William A. van den Broek - Doylestown PA

KDI Sylvan Pools, Inc. - Doylestown PA

E04H 320

417217

A gutter system is described for use around the perimeter of a swimming pool for skimming the surface water of the pool, and for returning clean water to the pool, which includes an open box like gutter body, made in two vertical halves with a cover plate detachably connecting the vertical halves at the top and a vertical lip extending from each gutter half at the bottom abutting and connected together by bolts. The gutter halves are formed in sections of uniform length which each have an overlapping portion at one end for telescoping engagement with the adjacent gutter length, and with brackets adjacent the ends of the gutter sections with bolts therethrough to hold the sections together. The gutter halves are bolted at the bottom to adjustable anchoring and support brackets fastened to the pool wall. The meeting points of the front and rear gutter sections may be staggered so that the front and back seams are not at the same location.