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US 3,982,738 AGranted
Dash-pot arrangement for balance
AssigneeMettler Instrumente AG
InventorsEugen Meier, Milan Ellner
Life of this patent
Estimating the term…
Abstract
The dash-pot connected to the balance beam of a portable balance is sealed about the piston rod of the dash-pot by a rubber ring mounted in the cover of the dash-pot and resiliently deformed when an abutment leg projecting from the balance housing is lifted from a supporting surface. The dash-pot arrangement is held thereafter automatically in the locked position, thereby also immobilizing the balance beam, by a spring-loaded detent until the detent is manually released.
Claims9
A dash-pot arrangement for a balance beam comprising:
- a. a vessel enclosing a cavity and formed with an access opening to said cavity;
- b. a body of liquid in said cavity;
- c. a rod member received in said opening with sufficient clearance to permit free movement of the rod member in a direction inward and outward of said cavity;
- d. a piston mounted on said rod member in said cavity, said piston dividing said cavity into two compartments and bounding a restricted throttling passage connecting said compartments;
- e. an annular sealing member of resilient material mounted on said vessel adjacent said opening;
- f. an annular engagement member of a material more rigid than said resilient material,
- 1. said rod member passing freely through said annular members in the relaxed condition of the member;
- g. operating means for moving said engagement member toward and away from a position of engagement with said sealing member,
- 1. said engagement member when in said position of engagement resiliently deforming said sealing member sufficiently so that said sealing member seals said opening against flow of said liquid from said cavity;
- and
- h. securing means for securing said rod member to said balance beam.
8 more elements
A dash-pot arrangement comprising:
- a. a support;
- b. a balance beam pivotally mounted on said support;
- c. a vessel enclosing a cavity and formed with an access opening to said cavity, said vessel being mounted on said support;
- d. a body of liquid in said cavity;
- e. a rod member secured to said balance beam and received in said opening with sufficient clearance to permit free movement of the rod member in a direction inward and outward of said cavity during pivoting movement of said balance beam on said support;
- f. a piston mounted on said rod member in said cavity, said piston dividing said cavity into two compartments and bounding a restricted throttling passage connecting said compartments;
- g. a sealing member of resilient material mounted on said vessel adjacent said opening and said rod member, said sealing member when in the relaxed condition permitting said movement of the rod member;
- h. an engagement member movable toward and away from a position of engagement with said sealing member, said engagement member when in said position resiliently deforming said sealing member sufficiently so that said sealing member seals said opening against flow of said liquid from said cavity;
- and
- i. operating means for moving said engagement member toward and away from said position thereof including
- 1. an abutment member movably mounted on said support and projecting from said support in a downward direction in a position of said arrangement in which said opening is directed upward,
- 2. yieldably resilient means biasing said abutment member in said downward direction, and
- 3. linking means linking said engagement member to said abutment member for moving the engagement member toward said position of engagement when said abutment member moves against the biasing force of said yieldably resilient means.
10 more elements
Dependencies are inferred from the claim text.