Supports – Machinery support – Adjustable size
Reexamination Certificate
2000-02-28
2001-07-17
Braun, Leslie A. (Department: 3632)
Supports
Machinery support
Adjustable size
C248S678000, C248S176300, C248S188200, C052S019000, C285S044000
Reexamination Certificate
active
06260815
ABSTRACT:
TECHNICAL FIELD
This invention relates to a support for furnaces that is adjustable to enable the furnace to be supported a desired predetermined distance above a floor.
BACKGROUND OF THE INVENTION
It is a well known practice to provide support stands for furnaces, the stands maintaining the bottom of the furnace a fixed distance from a floor. Conventional furnace support stands, however, cannot be adjusted and it is standard practice for heating supply companies and heating contractors to maintain a stock of stands of many different sizes. In contrast, as will be seen in detail below, the furnace support stand of the present invention can be readily adjusted to provide a stable support for a furnace under varying conditions and circumstances. For example, using the furnace support stand of the present invention, the dimensions of replacement furnaces can readily be accommodated, the stand being adjusted to position the furnace at the desired location relative to the duct work and other structures associated with the replaced furnace even though there is a difference in furnace size. The furnace support stand of the present invention can be placed directly on an old stand or the old stand may be replaced in its entirety, as desired.
It is also important to note that with prior art fixed size furnace support stands even a large inexpensive inventory of different sizes might not necessarily be sufficient to accommodate the variations one encounters with regard to the furnace and related duct work, etc., requiring the installer to take time consuming actions, such as positioning shims or other supports under the furnace support stand or furnace, in order to bring the furnace to the desired elevation.
The following patents are directed to supports of various types: U.S. Pat. No. 2,882,810, issued Apr. 21, 1959, U.S. Pat. No. 5,454,538, issued Oct. 3, 1995, U.S. Pat. No. 5,255,887, issued Oct. 26, 1993, U.S. Pat. No. 5,407,171, issued Apr. 18, 1995, and U.S. Pat. No. 5,308,037, issued May 3, 1994. The patents do not teach or suggest the unique combination of structural elements disclosed and claimed herein.
DISCLOSURE OF INVENTION
The present invention relates to an adjustable furnace support including a first support member formed of sheet metal including interconnected first support member side walls forming spaced first support member corners. The first support member defines a first support member interior, an open first support member top and an open first support member bottom. The open first support member top and the open support member bottom both are in communication with the first support member interior.
The adjustable furnace support also includes a second support member formed of sheet metal having a second support member bottom and including interconnected second support member side walls extending upwardly from the second support member bottom and forming spaced second support member corners. The second support member defines a second support member interior and an open second support member top communicating with the second support member interior. The first support member and the second support member are telescopically interconnected.
Attachment means is cooperable with the first and second support members for selectively retaining the first and second support members at predetermined positions relative to one another to maintain the top end of the first support member a fixed predetermined distance from the second support member bottom.
REFERENCES:
patent: 2882810 (1959-04-01), Goetth
patent: 4428166 (1984-01-01), Burghart
patent: 4526091 (1985-07-01), Sharp
patent: 4895066 (1990-01-01), Carnahan
patent: 5255887 (1993-10-01), Schumacher et al.
patent: 5308037 (1994-05-01), Gonzalez
patent: 5407171 (1995-04-01), Gonzalez
patent: 5409266 (1995-04-01), Baker
patent: 5454538 (1995-10-01), Merideth
patent: 5595031 (1997-01-01), Commins
patent: 5997118 (1999-12-01), McBrayer
Braun Leslie A.
Lampe Thomas R.
Marsh Steven
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